Rong Zheng

Peking Union Medical College Hospital, Peping, Beijing, China

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Publications (29)75.98 Total impact

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    ABSTRACT: Objective: To investigate 18F-fluorodeoxyglucose (18F-FDG, hereinafter abbreviated as FDG) uptake levels of the pancreas in healthy subjects undergoing positron emission tomography-computed tomography (PET-CT) scans and the various influential factors. Methods: This study included a total of 261 cases of healthy subjects enrolled from January 2007 to December 2011 who underwent a PET-CT scan at our center. The maximum standardized uptake values (SUVmax) of the pancreatic head, body, and tail were recorded. The subjects were grouped according to their gender, age, body mass index (BMI), history of diabetes, fasting blood glucose level, injection dose, and the time of acquisition after FDG injection. Results: The SUVmax of the pancreatic head, body, and tail of healthy subjects were 1.700 ± 0 3675, 1.729 ± 0.4105, and 1.482 ± 0.3983, respectively. The SUVmax of the pancreatic body and tail of males and the obesity group were higher than those of females and the normal group (including both the normal weight group and the underweight group), and the differences were statistically significant (P max of the pancreatic tail in youth and middle-aged groups were higher than those in the older age group, showing a statistically significant difference (F = 3.451, P = 0.033). In addition, the SUVmax of the pancreatic tail in subjects scanned 90 min post-FDG injection were higher than those scanned at ≤90 min, and the difference was statistically significant (F = 8.539, P = 0.000). Multivariate analysis showed that gender and the time of acquisition after the FDG injection were the two most influential factors of the SUVmax of the pancreatic tail. The differences between the groups with and without a history of diabetes, the four groups with different fasting fingertip blood glucose levels (P > 0.05) in this study. Conclusions: The SUVmax of the pancreatic head, body, and tail of healthy subjects and the influential factors were preliminarily determined. Gender, age, BMI, and in particular, the time of acquisition after the FDG injection had a greater impact on the FDG uptake levels of pancreas. However, a history of diabetes and fasting fingertip blood glucose values of Keywords: COMPUTED TOMOGRAPHY; FLUORODEOXYGLUCOSE; HEALTHY SUBJECTS; PANCREAS; POSITRON EMISSION TOMOGRAPHY; STANDARDIZED UPTAKE VALUE Document Type: Research Article DOI: http://dx.doi.org/10.1166/jmihi.2015.1554 Publication date: November 1, 2015 More about this publication? Journal of Medical Imaging and Health Informatics (JMIHI) is a medium to disseminate novel experimental and theoretical research results in the field of biomedicine, biology, clinical, rehabilitation engineering, medical image processing, bio-computing, D2H2, and other health related areas. Editorial Board Information for Authors Subscribe to this Title ingentaconnect is not responsible for the content or availability of external websites $(document).ready(function() { var shortdescription = $(".originaldescription").text().replace(/\\&/g, '&').replace(/\\, '<').replace(/\\>/g, '>').replace(/\\t/g, ' ').replace(/\\n/g, ''); if (shortdescription.length > 350){ shortdescription = "" + shortdescription.substring(0,250) + "... more"; } $(".descriptionitem").prepend(shortdescription); $(".shortdescription a").click(function() { $(".shortdescription").hide(); $(".originaldescription").slideDown(); return false; }); }); asp/jmihi/2015/00000005/00000007/art00028 dcterms_title,dcterms_description,pub_keyword 6 5 20 40 5 GA_googleFillSlot("Horizontal_banner_bottom");
    No preview · Article · Nov 2015 · Journal of Medical Imaging and Health Informatics
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    ABSTRACT: To assess the relationship between preoperative maximum standardized uptake value (SUVmax) measured on (18)F-FDG PET-CT and clinicopathologic parameters in patients with surgically resected non-small cell lung cancer (NSCLC). A total of 540 patients (348 men and 192 women, mean age 60 ± 10 years) with histologically proven non-small cell lung cancer, who had undergone both preoperative (18)F-FDG PET-CT imaging and curative surgery in our institution from October 2006 to January 2013, were analyzed retrospectively in this study. Primary tumor (18)F-FDG uptake, measured as SUVmax corrected for lean body mass, was compared among different variables and correlated with tumor size, histologic grade and postoperative pathologic TNM stage. Histologic grade was categorized into three degrees, where grade Irepresents highly, gradeIImoderately and grade III poorly differentiated. Large cell carcinomas were all assessed as poorly differentiated (grade III). Pathologic stage was assigned according to the seventh AJCC TNM staging system. There were 344 adenocarcinomas (AC, non- BAC type), 146 squamous cell carcinomas (SCC), 28 bronchioloalveolar carcinomas (BAC), 10 adenosquamous carcinomas (ASC) and 12 other type carcinomas (OTC, including 6 large cell carcinomas, 5 sarcomatoid carcinomas and 1 lymphoepitheloid carcinoma); the SUVmax in ascending order was BAC (1.3 ± 1.1), AC (5.1 ± 3.4), ASC (8.5 ± 2.8), SCC (9.9 ± 4.6) and OTC (10.9 ± 5.1), respectively. There were 76 grade I, 251 grade IIand 213 grade III; the SUVmax in ascending order was grade I (2.4 ± 2.2), grade II(5.9 ± 3.9), grade III (8.4 ± 4.4), respectively, and significant difference was identified among grade I, grade IIand gradeIII (all P < 0.01). The SUVmax was positively correlated with tumor size (r = 0.564, P < 0.01), histologic grade (r = 0.492, P < 0.01), T stage (r = 0.306, P < 0.01), N stage (r = 0.368, P < 0.01), and TNM stage (r = 0.437, P < 0.01). The preoperative SUVmax of the primary tumor differed significantly among histologic types in NSCLC. There were positive correlations between SUVmax and tumor size, histologic grade and pathologic stage. Our findings may suggest that a high SUVmax could be used to identify a high-risk population who would benefit most from adjuvant therapies.
    No preview · Article · Oct 2013 · Zhonghua zhong liu za zhi [Chinese journal of oncology]
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    ABSTRACT: To investigate the correlation between (18)F-FDG uptake in positron emission tomography/computed tomography imaging and tumor-proliferating antigen Ki-67 expression in aggressive lymphoma. Data of (18)F-FDG PET-CT imaging and immunohistochemical detection of Ki-67 expression of seventy-seven cases with initially diagnosed aggressive lymphoma were retrospectively analyzed. The intensity of (18)F-FDG accumulation was determined by calculating the maximum standardized uptake value (SUVmax) and average standardized uptake value (SUVave). The average SUV at biopsy site (BxSUVave), SUVmax at biopsy site (BxSUVmax) and SUVmax at the highest tumor activity site of the body (BmSUVmax) were collected. The BmSUVmax, BxSUVmax, and BxSUVave were 13.4 ± 6.8, 11.9 ± 6.8 and 7.3 ± 4.4, respectively,and Ki-67 was (61.2 ± 20.4)% in the 77 aggressive lymphomas. The BmSUVmax was significantly higher than the BxSUVmax or BxSUVave (P < 0.05). The BmSUVmax, BxSUVmax and BxSUVave were positively correlated with the Ki-67 expression in aggressive lymphoma (P < 0.05). A positive correlation was revealed between the BxSUVmax and BmSUVmax (P < 0.05), and between the BxSUVmax and BxSUVave (P < 0.05). No significant correlation was found between the BmSUVmax or BxSUVmax and the Ki-67 in DLBCL (P > 0.05). A positive correlation was observed between the BmSUVmax or BxSUVmax and the Ki-67 expression in NK/T cell lymphoma (P < 0.05). The increasing trend of (18)F-FDG uptake is correlated with the Ki-67 expression in aggressive lymphoma. The results of this study suggest that the metabolic information obtained by using BmSUVmax may help to compensate the limited sampling of histological examination at the biopsy site. Significant correlation in NK/T cell lymphoma suggests that the metabolic information from positron emission tomography-computed tomography may offer a useful parameter in the prognosis and management of this disease.
    No preview · Article · May 2013 · Zhonghua zhong liu za zhi [Chinese journal of oncology]
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    Meng Li · Ning Wu · Rong Zheng · Ying Liang · Ying Liu · Wenjie Zhang · Ni Li · Ping Zhao
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    ABSTRACT: Aim: To investigate the correlation between [¹⁸F]fluorodeoxyglucose (FDG) uptake in a primary tumor and pathologic N stages, and to further analyze the possible risk factors contributing to the regional lymph node metastasis. Patients and methods: Eighty patients with non-small cell lung cancer (NSCLC) who underwent positron emission tomography/computed tomography were enrolled in the study. The FDG uptake in the primary tumor was compared for the different N staging groups and further correlation was performed. The degree of FDG uptake in the primary tumor and other possible variables related to the incidence of lymph node metastasis were examined by univariate and logistic multivariate analysis. FDG uptake was quantitated using the maximum standardized uptake value (SUVmax). Results: Statistically significant differences were found in the SUVmax of the primary tumors among different N staging groups (F = 4.124, P = 0.023), and the correlation between them was also statistically significant (r = 0.438, P = 0.000). Univariate analysis showed that blood tumor markers, primary tumor size, histologic grade, and SUVmax of the primary tumor were significantly associated with lymph node involvement. Logistic multivariate analysis showed that blood tumor makers and SUVmax of primary tumor might be considered as significant predictive factors for lymph node metastasis in patients with NSCLC. Conclusion: Our results show that there is a significant relationship between the SUVmax of the primary tumor and the pathologic N stage of NSCLC. FDG uptake by the primary tumor may be an independent predictor of regional lymph node metastasis in patients with NSCLC.
    Preview · Article · Feb 2013 · Cancer Imaging
  • Meng Li · Ning Wu · Ying Liu · Rong Zheng · Ying Liang · Wenjie Zhang · Ping Zhao
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    ABSTRACT: [Fluorine-18]-fluorodeoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET-CT) is widely performed in the regional nodal staging of non-small cell lung cancer (NSCLC). However, the uptake of (18)F-FDG by tubercular granulomatous tissues may lead to false-positive diagnosis. This is of special concern in China, where tubercular granulomatous disease is epidemic. Herein, we evaluated the efficacy of an additional CT attenuation and a dual-time-point scan in determining the status of lymph nodes. Eighty NSCLC patients underwent curative surgical resection after (18)F-FDG PET-CT and separate breath-hold CT examinations. The initial images were analyzed by two methods. In method 1, nodal status was determined by (18)F-FDG uptake only. In Method 2, nodal status was determined by (18)F-FDG uptake associated with CT attenuation. For dual-time-point imaging, the retention index (RI) of benign and malignant nodal groups with positive uptake in the initial scan was examined. A total of 265 nodal groups were documented. On a per-nodal-group basis, the diagnostic sensitivity, specificity, and accuracy of Method 1 were 66.7%, 89.7%, and 85.3%, respectively, whereas those of Method 2 were 64.7%, 96.7%, and 90.6%, respectively. The improvement in diagnostic specificity and accuracy associated with the addition of CT attenuation in Method 2 as compared to Method 1 was statistically significant (p<0.01). Thirty-nine nodal groups with positive uptake in the initial scan underwent dual-time-point imaging and the difference in the RI between benign and malignant groups showed no statistical significance (p>0.05). (18)F-FDG PET-CT has high diagnostic value for preoperative lymph-node (N) staging of NSCLC patients. We show that (18)F-FDG uptake combined with CT attenuation improves the diagnostic specificity and accuracy of nodal diagnosis in NSCLC. For the lymph nodes with positive uptake in the initial scan, dual-time-point imaging has limited effect in differentiation.
    No preview · Article · Apr 2011 · European journal of radiology
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    ABSTRACT: To study the role of (125)I seed implantation in the treatment of unresectable pancreatic cancer. From April 2004 to march 2006, 66 untreated patients with locally advanced pancreatic cancer (LAPC) were randomized into two groups: Group A: (125)I seeds implantation (n = 31) and Group B: control (n = 34). The objective tumor response, clinical benefit response, toxicity, complications and survival of two groups were observed. In Group A, the overall response rate (PR + NC) was 80.6%. Clinical benefit response rate was 54.8%. No toxicity was observed. Gastrointestinal hemorrhage and pancreatic fistula occurred in 1 patient respectively in Group A. The survival rates of 6 and 12 months were 56.0% vs 31.4% and 16.8% vs 2.9% respectively in two groups (P < 0.05). The median survival time of two groups was 8.0 months vs 4.0 months (P < 0.05). (125)I seed implantation is a simple, safe and effective method in the treatment of locally advanced pancreatic cancer.
    No preview · Article · Jan 2010 · Zhonghua yi xue za zhi
  • Meng Li · Ning Wu · Ying Liang · Rong Zheng · Ying Liu · Wen-jie Zhang · Ping Zhao
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    ABSTRACT: To evaluate the diagnostic value of PET-CT with (18)F-FDG in preoperative N staging of non-small cell lung cancer (NSCLC), especially the additional value of CT attenuation and the dual-time-point imaging in determining the lymph nodes status. Forty-three NSCLC patients underwent curative surgical resection after integrated (18)F-FDG PET-CT examination. The initial scan images were analyzed by two methods. In the first method, the nodal status was determined by (18)F-FDG uptake only (method PET). In the second method, the nodal status was determined by uptake associated with CT attenuation (method PET and CT attenuation). Nodal uptake was interpreted visually and semi quantitatively. For dual-time-point imaging, a retention index (RI) > 10% was regarded as increasing trend. Histopathologic results served as the reference standard. On the per-nodal-station (group) basis, the diagnostic sensitivity, specificity, accuracy, PPV, and NPV were 88.0%, 88.4%, 88.3%, 59.5% and 97.4%, respectively, by the method 1; 84.0%, 94.6%, 92.9%, 75.0% and 96.8%, respectively, by the method 2. The specificity and accuracy between these two methods had statistically significant difference (P < 0.05). Twenty-eight nodal groups underwent dual-time-point imaging and the differences of DeltaSUV(max) and RI between benign and malignant groups had no statistically significant difference (P > 0.05). Eleven groups were malignant in 23 lymph nodal groups which had an increasing trend. Among the 5 nodal groups which did not show increase in delayed scan, one group was malignant. (18)F-FDG PET-CT has high diagnostic value in the preoperative N staging of NSCLC, and combining uptake with CT attenuation of lymph nodes can improve the specificity and accuracy. For the lymph nodes with high uptake in the initial scan, increasing uptake in delayed scan has little effect in differential diagnosis, but no increasing in delayed phase is more prone to benign diagnosis.
    No preview · Article · May 2009 · Zhonghua zhong liu za zhi [Chinese journal of oncology]
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    ABSTRACT: The purpose of this study was to examine the association between 4 Fas single nucleotide polymorphisms (SNPs) and risk of differentiated thyroid carcinoma (DTC) and salivary gland carcinoma (SGC). We conducted a case-control study including 279 DTC cases, 165 benign thyroid disease (BTD) cases, 154 SGC cases, 61 benign salivary gland disease (BSGD) cases, and 510 controls. The A744G SNP genotype distribution was significantly different between subjects with SGC or BSGD and controls, while that of the A18272G SNP was significantly different between subjects with DTC or SGC and controls. Risk of SGC was significantly elevated for the 22628 heterozygous CT genotype (odds ratio [OR] = 1.5, p = .050), and risk of BSGD was elevated for the 22628 homozygous TT genotype (OR = 2.9, p = .023). Fas C22628T SNP may be associated with risk of SGC and BSGD, but none of the investigated Fas SNPs was associated with risk of DTC. © 2007 Wiley Periodicals, Inc. Head Neck 2008
    Full-text · Article · Mar 2008 · Head & Neck
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    ABSTRACT: To determine the association between glutathione S-transferase (GST) polymorphisms and the risk of differentiated thyroid carcinoma (DTC) and benign thyroid tumors. Case-control study. Tertiary care cancer center. Two hundred one patients with DTC, 103 patients with benign thyroid tumors, and 680 cancer-free control subjects. Results of a polymerase chain reaction-based assay for genotyping. A multivariate logistic regression analysis was performed with adjustment for age, sex, ethnicity, tobacco use, and alcohol use. The patients with DTC were younger, more likely to be female and nonwhite, and less likely to smoke or consume alcohol than the controls. Overall, 55.2% of the DTC cases and 52.6% of the controls were null for the gene for GST-mu1 (GSTM1) (P = .52), and 25.4% of the DTC subjects and 20.6% of the controls were null for the GST-theta1 gene (GSTT1) (P = .15). However, 15.9% of the DTC cases but only 9.4% of the controls were null for both genes (P = .009). In addition, the results of the adjusted multivariate regression analysis suggested that having both null genotypes was associated with an increased risk for DTC (odds ratio [OR], 2.1 [95% confidence interval, 1.3-3.5; P = .003]). This was particularly true for women (OR, 2.5), current smokers (OR, 3.6), and nonwhites (OR, 5.6). A similar analysis demonstrated a nonsignificant association between these genotypes and benign thyroid tumors (OR, 1.5 [95% confidence interval, 0.7-3.0; P=.30). Our results suggest that the simultaneous presence of the GSTM1- and GSTT1-null genotypes is a susceptibility factor for DTC. Such knowledge may ultimately help refine cancer prevention efforts; however, larger studies are needed to verify these findings.
    No preview · Article · Aug 2006 · Archives of Otolaryngology - Head and Neck Surgery
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    ABSTRACT: To evaluate single photon emission computed tomography (SPECT) lung perfusion in predicting radiation pneumonitis in lung cancer patients. From April 2003 to March 2004, 31 lung cancer patients treated with radical radiotherapy received SPECT lung perfusion scans, among whom, 23 had had perfusion scans both before and at the time of 40 Gy irradiation. The perfusion changes in the region of interest (ROI) after irradiation were obtained through comparing post-radiotherapy with pre-radiotherapy average proportion of SPECT counts within the ROI relative to average counts of the whole lung. Endpoint was defined as grade 2 and above radiation pneumonitis according to RTOG criteria. Lung perfusion defect was observed in all the patients at baseline. > or = grade 2 lung perfusion defect was found in 68.2% (15/22) of patients with central lesion and in 22.2% (2/9) of patients with peripheral lesions (P = 0.04). Seventy percent of the patients (16/23) experienced improved perfusion at 40 - 50 Gy. > or = grade 2 radiation pneumonitis was observed in 12 patients (38.7%) in the whole group, with 6 in those with grade 1 perfusion defects and another 6 in > or = grade 2 group, respectively; Of the 23 patients who had had both pre- and post-radiotherapy SPECT perfusion scan, 5 > or = grade 2 radiation pneumonitis occurred in the 16 perfusion-improved patients and 3 in the 7 unimproved patients. There is no significant correlation between radiation pneumonitis and the extent of perfusion defect either before or after 40 - 50 Gy irradiation based on our limited data analysis in this series.
    No preview · Article · Mar 2006 · Zhonghua zhong liu za zhi [Chinese journal of oncology]
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    ABSTRACT: Sentinel lymph node (SLN) identification has been increasingly used in the treatment design of a variety of solid tumors, particularly breast cancer and melanoma. A negative SLN predicts the absence of tumor metastases in the regional lymph nodes with high accuracy. This study was to investigate the clinical value of combined isotope-dye technique for detecting SLN, and to evaluate the accuracy of SLN in predicting the pelvic lymph nodes status in patients with early stage cervical cancer. A total of 27 patients with early stage cervical cancer,scheduled for radical hysterectomy and total pelvic lymphadenectomy, were eligible for the study. Lymphoscintigraphy was performed with injection of radioactivity isotope (99m)Tc-labeled dextran ((99m)Tc-DX) into the uterine cervix 16 h before surgery. Methylthioninium (4 ml) was injected into the same points as (99m)Tc-DX during surgery, and the patients underwent lymphatic mapping with a handheld gamma-detecting probe. After resection of SLNs, standard radical hysterectomy with pelvic lymph node dissection was performed. All removed lymph nodes, including the SLNs, were examined by routine histopathology. The histopathologic results of SLNs and non-SLNs were compared. The detection rates of SLN were 96.3% by blue dye method, and 100% by radiolabeled tracer or combined isotope-dye. Blue dye method identified 61 SLNs, radiolabeled tracer identified 69 SLNs, and combined isotope-dye identified 70 SLNs. Preoperative SPECT/CT fusion images detected 4 SLNs in the parametrium. Seven (25.9%) patients had lymph node metastasis. The sensitivity, accuracy, negative predictive value, and false negative rate of SLN detection were 85.7% (6/7), 96.3% (26/27), 95.2% (20/21), and 14.3% (1/7), respectively. SPECT/CT imaging not only is superior to planar imaging in detecting SLN but also enables precise localization of SLNs. The combined isotope-dye method can improve the accuracy of SLN detection. SLN detection can accurately predict the pelvic lymph nodes status in early stage cervical cancer.
    Preview · Article · Mar 2006 · Ai zheng = Aizheng = Chinese journal of cancer
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    ABSTRACT: This case-control study was designed to detect the association between STK15 Phe31Ile polymorphism and colorectal cancer. Genotypes were determined in 283 patients with colorectal cancer and 283 controls. The adjusted odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using logistic regression model. The frequency of the STK15 Ile/Ile genotype was significantly higher in cancer cases than in controls (50.2% vs. 36.8%; P = 0.02). Subjects with the Ile/Ile genotype had an increased risk for the occurrence of colorectal cancer compared with those with the STK15 Phe/Phe genotype (adjusted OR, 1.92; 95% CI, 1.13 - 3.27). No significant association was observed between this STK15 polymorphism and risk of metastasis of the cancer. These findings suggest that STK15 Phe/Ile polymorphism may be a genetic susceptibility factor for colorectal cancer among Chinese.
    No preview · Article · Feb 2006 · Zhonghua zhong liu za zhi [Chinese journal of oncology]
  • Erich M Sturgis · Chong Zhao · Rong Zheng · Qingyi Wei
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    ABSTRACT: Radiation is the only clear etiologic agent for differentiated thyroid cancer (DTC). Understanding the factors affecting sensitivity to gamma radiation and susceptibility to DTC will be critical to early detection and prevention of DTC. Germline variants of double-strand break repair genes are markers of DTC risk. Determine the frequency of common single nucleotide polymorphisms of genes of the double-strand break repair pathway in patients with DTC and cancer-free controls. Case-control study. This study included 134 patients with DTC, 79 patients with benign thyroid lesions, and 166 cancer-free control subjects. To avoid ethnic confounding, all subjects were non-Hispanic whites. Genotype analyses were performed on DNA isolated from peripheral blood lymphocytes. Multivariate logistic regression analyses were performed to estimate the risk of DTC associated with each variant genotype. The XRCC3 18067T polymorphic allele was found significantly more commonly among the DTC cases than for the control subjects (P=.006). After multivariate adjustment, having the XRCC3 18067T allele was associated with an increased risk of DTC (adjusted odds ratio [OR] = 2.1; 95% confidence interval [CI] = 1.3 to 3.4; P = .004). In addition, there was a suggestion that the XRCC3 18067T polymorphic allele was more common among the patients with benign thyroid disease (P = .054), and the homozygous polymorphic genotype was associated with risk for benign thyroid disease (adjusted OR = 2.1; 95% CI = 0.9-4.9; P = .078). In this case-control analysis, the XRCC3 18067T polymorphism is associated with DTC risk. However, such work needs confirmation in larger studies.
    No preview · Article · Jul 2005 · The Laryngoscope
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    ABSTRACT: ObjectiveRadiation-induced lung injury commonly follows radiotherapy (RT) for tumors within and near the thorax. Lung function is usually measured by pulmonary function tests (PFTs). But RT-induced regional changes of pulmonary function cannot be accurately evaluated by PFTs. Lung perfusion scintigraphy compared with other radiographic methods can assess well regional pulmonary physiological function, and a 3-dimensional conformai radiotherapy planning system can quantitatively calculate irradiation dosage. The purpose of this study is to assess, by lung perfusion scintigraphy, early changes in the pulmonary function of patients with lung cancer when receiving thoracic 3-dimensional conformaL radiotherapy (3D-CRT). MethodsNineteen patients receiving thoracic 3D -CRT for lung cancer were studied. A single photon emission computed tomography (SPECT) lung perfusion scan, X -ray or CT scan before RT and after 40 ∼50Gy radiation were performed. Pre -RT SPECT lung perfusion images were classified by comparing lung perfusion defects with radiological abnormalities before RT. Grade 0: There was no lung perfusion defect in the area of radiological abnormality. Grade 1: The size of the radiological abnormality was similar to the area of the lung perfusion defect. Grade 2: The area of the lung perfusion defect was bigger than the size of the radiological abnormality and extended to one lobe of the lung. Grade 3: The area of lung perfusion defect exceeded one lobe of the lung. The radiation field with more than 20 Gy was drawn as a region of interest (ROI). The proportion of radioactive dose within this ROI relative to total lung dose in one slice was calculated. ResultsAll patients had lung perfusion defects, nine patients with grade 1, five patients with grade 2 and five patients with grade 3 damage, respectively. All tumors in the 19 patients were reduced in CT or X-ray images to various degrees after 40∼50 Gy radiation. The mean proportion of ROI in 19 patients was 53.7±29.8% before radiation as compared to 57.6± 22.6% during RT. The difference between these two groups was not significant (P=0.280). The decreased relative lung perfusion post-RT was found in six patients, whereas the increased relative lung perfusion post-RT was observed in 13 patients. ConclusionSPECT lung perfusion scaning is a simple, convenient and useful method for assessing regional lung function pre -RT and for monitoring the changes in regional lung function after irradiation.
    No preview · Article · Mar 2005 · Chinese Journal of Clinical Oncology
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    ABSTRACT: In vitro gamma-radiation-induced chromatid breaks per cell (b/c) in lymphocytes may be associated with risk of papillary thyroid cancer (PTC). This pilot case-control study involved 106 patients with thyroid disease (57 with PTC and 49 with benign thyroid disease) and 105 cancer-free matched controls. Multivariate logistic regression analyses identified that an elevated gamma-radiation-induced b/c value was a risk factor for PTC (adjusted odds ratio = 4.54; 95% CI, 2.07-9.95), and a dose-response relationship was evident when the b/c values were categorized into tertiles. High levels of chromatid breaks induced by gamma-radiation may constitute an independent risk factor for PTC, but further study is needed.
    No preview · Article · Mar 2005 · Thyroid
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    ABSTRACT: Radiation-induced lung injury is commonly following radiotherapy (RT)for tumors in,and around the thorax. Lung function is usually assessed by pulmonary function tests (PFTs), but RT-induced regional changes of pulmonary function cannot be accurately evaluated by PFTs. Lung perfusion scintigraphy compared with other radiographic methods can well assess the regional pulmonary physiological function,and 3-dimension conformal radiotherapy (3D-CRT) planning system can quantitatively calculate irradiation dosage. This study was to assess early changes in the pulmonary function of patients with lung cancer receiving thoracic 3D-CRT by lung perfusion scintigraphy. Nineteen patients receiving thoracic 3D-CRT for lung cancer were studied. Single photon emission computed tomography (SPECT) lung perfusion scan,and X-ray or CT scan before RT, and after 40-50 Gy radiation were performed. Pre-RT SPECT lung perfusion images were classified by comparing lung perfusion defect with area of radiological abnormality before RT. Grade 0: no lung perfusion defect in the area of radiological abnormality. Grade 1: the size of radiological abnormality is similar to the area of lung perfusion defect. Grade 2: the area of lung perfusion defect is bigger than that of radiological abnormality,and extend to 1 pulmonary lobe. Grade 3: the area of lung perfusion defect exceed 1 pulmonary lobe. The radiation field with more than 20 Gy was drawn as a region of interest (ROI). The proportion of radioactive count within this ROI to total lung count in one slice was calculated to assess changes in pulmonary function after RT. Student's t test was used for statistical analyses. All patients had lung perfusion defect, 9 patients with grade 1 damage, 5 patients with grade 2 damage, and 5 patients with grade 3 damage. All tumors in the 19 patients were reduced with variant degree after 40-50 Gy radiation in CT or X-ray images. The mean radioactive proportions of ROI in 19 patients were (53.7+/-29.8)% before radiation,and (57.6+/-22.6)% during RT, the difference wasn't significant (P=0.280). The relatively decreased post-RT lung perfusion was observed in 6 patients, whereas the relatively increased post-RT lung perfusion was observed in 13 patients. SPECT lung perfusion scans is a simple, convenient, and useful method for assessing pre-RT regional lung function,and monitoring the changes in regional lung function after irradiation.
    No preview · Article · Nov 2004 · Ai zheng = Aizheng = Chinese journal of cancer
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    ABSTRACT: While radiation has been the only well-established risk factor for salivary and thyroid cancers, the exact mechanisms remain unknown. We hypothesized that individuals with altered apoptotic response to gamma irradiation may be susceptible to salivary and thyroid cancers. We tested our hypothesis in a pilot case-control study of 29 patients with neoplasms of the salivary and thyroid glands and 29 cancer-free control subjects. Patients and control subjects were matched on age, sex, and ethnicity. In vitro gamma radiation-induced apoptosis in lymphocytes was quantified utilizing the TUNEL assay and flow cytometry. The mean apoptotic capacity was 13.55 +/- 10.54 for control subjects, 5.75 +/- 4.96 for patients with salivary gland carcinomas (p =.003), and 6.87 +/- 4.45 for patients with thyroid carcinomas (p =.006). These differences were associated with a 10-fold increased risk of salivary gland carcinoma (odds ratio [OR] = 10.71; 95% confidence interval [CI], 1.21-94.86) and a four-fold increased risk of thyroid carcinoma (OR = 3.93; 95% CI, 0.90-17.08). Our data suggests that gamma radiation-induced apoptosis may serve as a biomarker of genetic susceptibility to salivary and thyroid carcinoma, and further confirmatory studies with larger sample size are warranted.
    Full-text · Article · Jul 2004 · Head & Neck

  • No preview · Article · Jun 2004 · Shock
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    ABSTRACT: The salivary gland is a highly radiosensitive organ. Exposure to gamma radiation is a risk factor for both malignant (MSTs) and benign salivary gland tumors (BSTs), but the exact mechanisms remain unknown. The objectives of the current study were to determine whether gamma radiation-induced chromatid breaks increase the risk of MSTs and BSTs and whether there is any difference in risk between these two diseases. The authors performed a pilot case-control study of 57 patients with salivary gland diseases (45 patients with MSTs and 12 patients with BSTs) and 105 cancer-free controls. Peripheral blood lymphocytes from these participants were cultured and exposed to gamma radiation (1.5 grays). Five hours later, metaphase spread slides were evaluated. The chromatid breaks in 50 well-spread metaphase slides were counted to determine the average number of chromatid breaks per cell (b/c). Multivariate logistic regression analyses revealed that gamma radiation-induced b/c values greater than the median of the controls were a significant risk factor for salivary gland tumors (adjusted odds ratio [OR], 17.25; 95% confidence interval [CI], 4.92-60.49). The risk remained significant for MSTs (adjusted OR, 40.45; 95% CI, 5.27-310.17) but was of borderline significance for BSTs (adjusted OR, 4.73; 95% CI, 0.94-23.87) when these tumors were analyzed separately. In the current study, high levels of chromatid breaks in lymphocytes induced by gamma irradiation were associated with an independent risk for MSTs and were likely to increase the risk of BSTs. However, larger studies are needed to verify these findings.
    Full-text · Article · Feb 2004 · Cancer
  • S. Yang · R. Zheng · K. I. Bland · I H Chaudry

    No preview · Article · Jun 2003 · Shock

Publication Stats

597 Citations
75.98 Total Impact Points

Institutions

  • 2011-2015
    • Peking Union Medical College Hospital
      Peping, Beijing, China
  • 2005-2013
    • Fuda Cancer Hospital
      Shengcheng, Guangdong, China
  • 2010
    • Chinese Academy of Medical Sciences
      Peping, Beijing, China
  • 2008
    • Baylor College of Medicine
      Houston, Texas, United States
  • 2001-2005
    • University of Texas MD Anderson Cancer Center
      • • Department of Head and Neck Surgery
      • • Department of Epidemiology
      Houston, Texas, United States
  • 2002-2004
    • University of Alabama at Birmingham
      • • Department of Surgery
      • • Department of Medicine
      Birmingham, Alabama, United States
  • 1999
    • University of Houston
      Houston, Texas, United States