K M Yeon

Gachon University, Seongnam, Gyeonggi, South Korea

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Publications (149)371.21 Total impact

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    ABSTRACT: PURPOSE To determine the relevance of meniscal deformation and displacement in MR imaging to tears using arthroscopic findings as a standard of reference in children with discoid lateral meniscus (DLM). METHOD AND MATERIALS MR imaging and intraoperative videos of 69 consecutive patients (79 knees), treated arthroscopically for suspicious DLM tears, were reviewed. Mean age at surgery was 10.9 years (range, 4.3-17.6). Signal changes and morphologic changes (deformation or displacement) of DLM in MR images were graded by two independent observers using authors’ modifications of previously described classification schemes, and then the grades were determined by consensus of the observers. Meniscal tears were assessed by an observer, blinded to the MR imaging, based on arthroscopic findings. Signal changes and morphologic changes of DLM in MR images were correlated with tears. Fisher's exact test was used to determine the significances of correlations. P-values < 0.05 were considered significant. RESULTS Tears were found more frequently in menisci showing morphologic changes in MR images (p=0.00124). Of the 25 menisci with a grade 3 signal change (linear or band-like signal intensity extending to the superior or inferior meniscal surface), 24 had tears and a horizontal cleavage was the most commonly associated tear type. Of the 50 menisci with a grade 1 (dot-like intrameniscal signal change), a grade 2 (linear or band-like intrameniscal signal change) or a diffuse signal change, 34 menisci were morphologically changed in MR images and 29 of these (85%) were torn, while 9 of 16 menisci (56%) not morphologically changed were torn (p=0.0363). CONCLUSION Meniscal deformation or displacement observed in preoperative MR imaging was correlated with meniscal tears with a higher risk. These MR imaging findings may be helpful for predicting tears especially when the DLM shows a signal intensity other than a grade 3 change. CLINICAL RELEVANCE/APPLICATION Meniscal deformation or displacement observed in preoperative MR imaging can be helpful for predicting tear especially when discoid lateral meniscus shows indetermined intrameniscal signal abnormality
    Radiological Society of North America 2011 Scientific Assembly and Annual Meeting; 12/2011
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    ABSTRACT: We report a case of thymic hyperplasia accompanied by pericardial lipomatosis and right facial hemihypertrophy in an 8-year-old boy. On imaging studies, the hyperplastic thymus had prominent curvilinear and nodular fatty areas simulating a fat-containing anterior mediastinal mass, which is an unusual finding in children. To our knowledge, this is the first report on a child with a combination of thymic hyperplasia, pericardial lipomatosis, and right facial hemihypertrophy. The radiologic findings are presented with a brief discussion.
    Korean journal of radiology: official journal of the Korean Radiological Society 05/2011; 12(3):376-81. · 1.32 Impact Factor
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    ABSTRACT: Sinus pericranii is a rare venous anomaly, which shows abnormal communication between the intracranial and extracranial venous systems. Sonograms of sinus pericranii in 4 children were retrospectively reviewed to evaluate the following imaging findings: the overall sonographic appearance, change in size and shape, Doppler flow pattern, and associated anomalies. All 4 patients had irregularly shaped anechoic lesions with lobulating and bulging contours. They all showed intracranial and extracranial venous communication through a calvarial defect. Two patients had changes in the sizes and shapes of the lesions, and 2 patients had bidirectional turbulent flow on Doppler images. Two patients had isolated sinus pericranii, and the other 2 were associated with Crouzon syndrome. By identifying a venous scalp mass with intracranial and extracranial venous communication and changes in its size, shape, and venous flow pattern, radiologists will be able to make a definitive diagnosis of sinus pericranii by using gray scale and Doppler sonography.
    Journal of ultrasound in medicine: official journal of the American Institute of Ultrasound in Medicine 03/2011; 30(3):411-7. · 1.40 Impact Factor
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    ABSTRACT: We report a case of isolated periostitis associated with Takayasu arteritis in a 10-year-old boy presenting with calf pain. Radiographs revealed a localized, thick periosteal reaction with irregular margin in the proximal left fibula. MRI revealed irregular thickening with enhancement of the periosteum in the proximal fibula and heterogeneous enhancement along vascular bundles in the calf. Isolated periostitis is a rare skeletal manifestation of systemic vasculitis that could be misdiagnosed as neoplastic or traumatic periosteal reaction.
    Pediatric Radiology 12/2010; 40 Suppl 1:S116-9. · 1.57 Impact Factor
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    ABSTRACT: To determine whether there is a correlation between liver MR findings and the clinical manifestations and severity of liver dysfunction in patients with Wilson's disease. Two radiologists retrospectively evaluated MR images of the liver in 50 patients with Wilson's disease. The Institutional Review Board approved this retrospective study and informed consent was waived. MR images were evaluated with a focus on hepatic contour abnormalities and the presence of intrahepatic nodules. By using Fisher's exact test, MR findings were compared with clinical presentations (neurological and non-neurological) and hepatic dysfunction, which was categorized by the Child-Pugh classification system (A, B and C). Follow-up MR images were available for 17 patients. Contour abnormalities of the liver and intrahepatic nodules were observed in 31 patients (62%) and 25 patients (50%), respectively. Each MR finding showed a statistically significant difference (p < 0.05) among the three groups of Child-Pugh classifications (A, n = 36; B, n = 5; C, n = 9), except for splenomegaly (p = 0.243). The mean age of the patients with positive MR findings was higher than that of patients with negative MR findings. For patients with Child-Pugh class A (n = 36) with neurological presentation, intrahepatic nodules, surface nodularity, and gallbladder fossa widening were more common. Intrahepatic nodules were improved (n = 8, 47%), stationary (n = 5, 29%), or aggravated (n = 4, 24%) on follow-up MR images. MR imaging demonstrates the contour abnormalities and parenchymal nodules of the liver in more than half of the patients with Wilson's disease, which correlates with the severity of hepatic dysfunction and clinical manifestations.
    Korean journal of radiology: official journal of the Korean Radiological Society 11/2010; 11(6):665-72. · 1.32 Impact Factor
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    ABSTRACT: The purpose of this study was to examine the clinical applicability of Doppler sonography by evaluating Doppler sonographic findings in an experimental rabbit model of necrotizing enterocolitis (NEC). Necrotizing enterocolitis was experimentally induced using a combination of endotoxin, hypoxia, and cold stress in 23 rabbits. Doppler sonography was performed to obtain the Doppler spectrum of the superior mesenteric artery. From the flow profile, the peak systolic velocity (PSV) and resistive index (RI) were calculated at 5 time sessions: initial and 1 to 2, 3 to 4, 5 to 6, and 20 to 24 hours. Animals were divided into 2 groups based on pathologic NEC scores (NEC-positive [NEC+] group versus NEC-negative [NEC-] group). Differences between the groups with regard to RI and PSV values were evaluated for each time session. Comparison of RI and PSV values between the NEC+ and NEC- groups revealed a significant increase in the PSV in the NEC+ group during the 1- to 2-hour session (P = .0199). Comparison of RI and PSV differences revealed a significant increase in RI and PSV differences in the NEC+ group during the 1- to 2-hour session (P = .0095 and .0013, respectively). In the other time sessions, there was no difference between the groups. The NEC+ group showed a significant increase in the PSV and RI during the 1- to 2-hour period.
    Journal of ultrasound in medicine: official journal of the American Institute of Ultrasound in Medicine 03/2010; 29(3):379-86. · 1.40 Impact Factor
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    ABSTRACT: We retrospectively evaluated the effectiveness of the esophageal balloon dilatation (EBD) in children with a corrosive esophageal stricture. The study subjects included 14 patients (M:F = 8:6, age range: 17-85 months) who underwent an EBD due to a corrosive esophageal stricture. The causative agents for the condition were glacial acetic acid (n = 9) and lye (n = 5). A total of 52 EBD sessions were performed in 14 patients (range 1-8 sessions). During the mean 15-month follow-up period (range 1-79 months), 12 patients (86%) underwent additional EBD due to recurrent esophageal stricture. Dysphagia improved after each EBD session and oral feeding was possible between EBD sessions. Long-term success (defined as dysphagia relief for at least 12 months after the last EBD) was achieved in two patients (14%). Temporary success of EBD (defined as dysphagia relief for at least one month after the EBD session) was achieved in 17 out of 52 sessions (33%). A submucosal tear of the esophagus was observed in two (4%) sessions of EBD. Only a limited number of children with corrosive esophageal strictures were considered cured by EBD. However, the outcome of repeated EBD was sufficient to allow the children to eat per os prior to surgical management.
    Korean journal of radiology: official journal of the Korean Radiological Society 03/2010; 11(2):203-10. · 1.32 Impact Factor
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    ABSTRACT: Congenital esophageal stenosis (CES) can be associated with esophageal atresia/tracheoesophageal fistula (EA/TEF). Because there are a variety of degrees of obstruction and symptoms of CES, it is frequently difficult to make a pre- and post-operative diagnosis of the distal CES associated with EA/TEF. To evaluate the clinical and radiologic features of congenital esophageal stenosis associated with esophageal atresia/tracheoesophageal fistula. We retrospectively reviewed postoperative esophagograms and medical records of 187 children (107 boys, 80 girls) who had primary repair of EA/TEF from 1992 to 2009 at our institution. We evaluated the incidence of CES, clinical findings, radiologic features and management of CES in these children. CES was diagnosed in 22 of 187 EA/TEF children (12%); one child had double CES lesions, for a total of 23 lesions. Ten of those 22 children (45%) had presented with significant symptoms of esophageal obstruction. The diagnosis of CES was delayed in 10 children (45%) until 1-10 years of age. On esophagogram, CES (n = 23) was located in the distal esophagus (n = 20, 87%) or mid-esophagus (n = 3, 13%). The degree of stenosis was severe (n = 6, 26%), moderate (n = 10, 43%), or mild (n = 7, 30%). Eight children, including two with unsuccessful esophageal balloon dilatation of CES, were treated surgically. Histologic examination revealed tracheobronchial remnant (n = 7) or fibromuscular hyperplasia (n = 1). One child with surgically treated CES developed achalasia at the age of 3 years 9 months. Esophagography after EA/TEF repair should be performed with a high index of suspicion for the presence of distal CES, because the diagnosis and adequate management of CES can often be delayed.
    Pediatric Radiology 03/2010; 40(8):1353-9. · 1.57 Impact Factor
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    ABSTRACT: OBJECTIVE: The purpose of this study was to evaluate retrospectively the CT and sonographic features in nine children with pathologically proven inflammatory myofibroblastic tumors of the abdomen. CONCLUSION: Although inflammatory myofibroblastic tumors occur in various sites and the imaging characteristics are variable, tumors showed different imaging patterns that were dependent on the site at which the tumor had originated.
    American Journal of Roentgenology 11/2009; 193(5):1419-24. · 2.90 Impact Factor
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    ABSTRACT: The purpose of our study was to determine whether CT provides additional information for children with a suspected residual foreign body in the airway after bronchoscopy. We reviewed the CT findings and medical records of nine patients (five girls and four boys; mean age, 17.9 months) who underwent CT between March 1999 and February 2007 for the evaluation of a clinically suspected residual foreign body in the airway after bronchoscopy. We evaluated the location and pattern of bronchial obstruction and associated parenchymal abnormalities on CT. CT findings were compared with a second bronchoscopy in five patients. The remaining four patients were followed clinically. Association between CT findings and results on second bronchoscopy was evaluated with Fisher's exact test. CT after bronchoscopy (n = 9) showed bronchial obstruction in eight patients with focal complete (n = 3), diffuse (n = 3), or combined type (n = 2) bronchial obstruction. These obstructions were not seen at chest radiography. CT revealed unilateral or lobar emphysema (n = 6), atelectasis (n = 6), and consolidation (n = 1). The remaining one patient showed no abnormality on CT. A second bronchoscopy (n = 5) confirmed the focal complete bronchial obstruction at CT (n = 3) as retained foreign body fragments (n = 2) or mucus plug (n = 1) and the combined type at CT (n = 2) as retained foreign body fragments, granulation tissue, and edema of the bronchus (n = 1) or retained foreign body fragments, granulation tissue, and mucus plug (n = 1). There was a significant association between CT findings of type of bronchial obstruction and intrabronchial obstructive lesion on the second bronchoscopy (p = 0.036). CT after bronchoscopy can provide additional information regarding the presence and pattern of bronchial obstruction in children with a suspected residual foreign body.
    American Journal of Roentgenology 07/2009; 192(6):1744-51. · 2.90 Impact Factor
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    ABSTRACT: To evaluate whether perfusion magnetic resonance (MR) imaging can depict hemodynamic status after revascularization surgery and whether changes at perfusion MR imaging after revascularization surgery correspond with clinical outcome in moyamoya disease. An institutional review board approved this retrospective study; informed consent was waived. Pre- and postoperative perfusion MR imaging data in 67 children with moyamoya disease (mean age, 7.2 years; range, 2-13 years) were included. Regional time to peak (rTTP) and regional cerebral blood volume (rCBV) were calculated by adjusting cerebral time to peak (TTP) and cerebral blood volume (CBV) values by using cerebellar reference values. For quantitative regional analysis, pixel values were divided into five categories (>0, >2, >4, >6, and >8 seconds), and percentages of pixels in rTTP meeting these time conditions were calculated. Changes in the values after revascularization were calculated. Postoperative clinical outcomes were categorized as follows: 1 indicated excellent; 2, good; 3, fair; and 4, poor. Pre- and postoperative perfusion parameters were compared by using a paired t test; relationships between perfusion parameters and clinical outcomes were investigated by using one-way analysis of variance, with a significance level of .05. rTTP, rCBV, and percentage of pixels of rTTP decreased significantly after revascularization surgery. Pre- and postoperative rTTP were significantly different for the clinical outcome categories. Change in rTTP and change in percentage of pixels of rTTP (>0 seconds to >6 seconds) were significantly different for the clinical outcome categories. TTP and CBV perfusion maps can depict hemodynamic status after revascularization surgery in moyamoya disease. Furthermore, changes in TTP perfusion maps after revascularization surgery correspond with clinical outcome in patients with moyamoya disease.
    Radiology 05/2009; 251(1):216-23. · 6.34 Impact Factor
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    ABSTRACT: Patients with complex congenital heart defects palliated by connecting the systemic veins directly to the pulmonary circulation are known to develop hepatopulmonary syndrome (HPS). Although rare, HPS can develop following the Fontan operation. To present and analyse the CT findings of HPS in patients with a Fontan circulation. From May to December 2005, six patients with HPS following the completion of a Fontan circulation were evaluated. CT findings were reviewed and were compared with angiographic findings. All six patients showed unilateral involvement. All patients except one had inferior vena cava (IVC) interruption with azygos continuation. CT scans showed abnormal vascular dilatation in one lung, and properly demonstrated the anatomy causing the hepatic venous blood to flow preferentially into one lung. These CT findings correlated well with the angiography findings. HPS that develops after the Fontan procedure is typically unilateral and is often associated with IVC interruption and azygos or hemiazygos continuation. CT demonstrates dilatation of pulmonary vessels in the affected lung and may be able to demonstrate the underlying anatomical cause for the predilection of hepatic venous flow to the contralateral lung.
    Pediatric Radiology 03/2009; 39(4):336-42. · 1.57 Impact Factor
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    ABSTRACT: This study was designed to assess the usefulness of transperineal ultrasonography (US) for the determination of imperforate anus (IA) type. From January 2000 to December 2004, 46 of 193 patients with an IA underwent transperineal US prior to corrective surgery. Sonographic findings were reviewed to identify the presence of internal fistulas and to determine "distal rectal pouch to perineum (P-P)" distances. IA types were determined based on the sonographic findings, and the diagnostic accuracy of transperineal US was evaluated based on surgical findings. Of the 46 patients, 17 patients were surgically confirmed as having a high-type IA, three patients were confirmed as having an intermediate-type IA and 26 patients were confirmed as having a low-type IA. The IA type was correctly diagnosed by the use of transperineal US in 39 of the 46 patients (85%). In 14 of the 17 patients with a high-type IA, internal fistulas were correctly identified. All cases with a P-P distance > 16 mm were high-type IAs and all cases with a P-P distance < 5 mm were low-type IAs. Transperineal US is a good diagnostic modality for the identification of internal fistulas in cases of high-type IA and for defining the IA level.
    Korean journal of radiology: official journal of the Korean Radiological Society 01/2009; 10(4):355-60. · 1.32 Impact Factor
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    ABSTRACT: PURPOSE To develop high-resolution CT (HRCT) scoring system for bronchopulmonary dysplasia (BPD) and assess its usefulness in evaluating clinical severity in infants with BPD. METHOD AND MATERIALS Preterm infants with BPD (n=42) were evaluated prospectively by HRCT at the time of discharge (corrected gestational age 35 ~ 55 weeks) between March 2007 and March 2008. HRCT scores (range, 0-36) of each patient were calculated based on the sum of the number of bronchopulmonary segments which showed 1) parenchymal lesions (subpleural triangular or linear opacities, atelectasis and distortion of architecture) or 2) emphysema, respectively. We statistically analyzed interobserver reproducibility and investigated whether this scoring system reflected the clinical severity of BPD as defined by NICHD (2001) in these patients. We also compared HRCT scores with chest radiographic scores [Toce score (1984)] in terms of correlation with clinical severity. RESULTS The HRCT scores had good interobserver reproducibility (ĸ=0.767, p<0.001) and showed more significant correlation (observer 1, r=0.661, p<0.001; observer 2, r=0.649, p<0.001) with the clinical severity of BPD than chest radiographic scores (r=0.440, p=0.004; r=0.388, p=0.011, respectively). The HRCT scores for emphysema showed better correlation (r=0.740, p<0.001; r=0.690, p<0.001, respectively) with clinical severity than those for parenchymal lesions (r=0.508, p=0.001; r=0.547, p<0.001, respectively). CONCLUSION Our HRCT scoring system can be used for assessing patients with BPD. Scores for emphysema correlated better with clinical severity than those for parenchymal lesions. CLINICAL RELEVANCE/APPLICATION HRCT scoring system revealed more significant correlation with the clinical severity of BPD than chest radiographic scoring system.
    Radiological Society of North America 2008 Scientific Assembly and Annual Meeting; 12/2008
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    ABSTRACT: PURPOSE To describe the MR imaging appearance of germ cell tumors (GCT) in the basal ganglia and thalamus and their temporal changes. METHOD AND MATERIALS Twenty-four patients with pathologically confirmed GCT involving basal ganglia and thalamus (mean age 12.5 years; range 7-18 years, 92% boys) were retrospectively evaluated. All patients were confirmed as GCT by stereotactic biopsy or excision of the tumor [germinoma (n=22), mixed germ cell tumor (n=1) and mature teratoma (n=1)]. MR images prior to diagnosis were available in eight patients. MR imaging analysis was focused on the morphology and signal characteristics of the tumor, atrophy of ipsilateral cerebral peduncle, and temporal changes of the tumors. Germinoma with negative serum tumor markers (HCG/αFP) were compared with germinoma with positive tumor markers. RESULTS GCT involving the basal ganglia and thalami were unilateral in 22 patients (92%) and bilateral in two patients (8%). Tumors (n=26) were mostly cystic with solid portion (n=14, 54%), mostly solid with a few tiny cysts (n=7, 27%), or ill-defined, subtle signal changes on T2WI (n=5, 19%) at the time of diagnosis. Solid portion of the tumor was isointense relative to the cerebral cortex for all MR pulse sequences. The cystic portion showed various signal intensity on T1WI. Intratumoral hemorrhage with fluid-fluid level was seen in seven lesions. In 22 patients with unilateral lesions, ipsilateral rainstem atrophy was found in 17 patients (81%). Patients with ill-defined lesions showed ipsilateral atrophy of the basal ganglia in all patients. Enhanced T1WI showed heterogeneous enhancement in the solid portions, peripheral enhancement of the cystic portions, and poor enhancement of the ill-defined lesions. In eight patients with follow-up MR images, ill-defined, subtle signal abnormalities in the basal ganglia and thalamus changed into mostly cystic(n=3) or mostly solid lesions (n=2). Germinoma with positive tumor markers showed a lager mass (p< 0.001) with mostly cystic component (p=0.029). CONCLUSION GCT involving the basal ganglia and thalamus showed a spectrum of MR features from ill-defined subtle signal abnormalities to a mixed solid and cystic tumor. CLINICAL RELEVANCE/APPLICATION GCT should be included in the differential diagnosis of the ill-defined basal ganglia and thalamic lesion in teenage boy and may require serum/CSF markers and biopsy for diagnosis.
    Radiological Society of North America 2008 Scientific Assembly and Annual Meeting; 11/2008
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    ABSTRACT: Central skull base tumours are rare in children. To characterize the imaging features of central skull base lymphoma in children to aid its diagnosis. The authors reviewed the CT findings (available in three patients) and MR findings (available in four patients) in four patients (three boys, one girl; age 2-12 years) with pathologically proven lymphoma (two with Burkitt lymphoma, two with B-cell lymphoma) involving the central skull base. Tumour location and extent, MRI signal intensities, noncontrast CT attenuation, patterns of enhancement, and changes in adjacent structures were evaluated. All four tumours involved the sphenoid bone. In three patients, the tumour extended to the ethmoid sinus and both cavernous sinuses. All lesions were isointense solid masses on T2-weighted images and showed avid enhancement, except for one lesion with a focal necrosis. All tumours were associated with adjacent dural thickening. Non-contrast CT showed highly attenuating masses and permeative bone destruction in the central skull base. Lymphoma involving the central skull base in children is visualized as an isointense mass on T2-weighted MRI with marked contrast enhancement and adjacent dural thickening, and as a highly attenuating mass on noncontrast CT with permeative or erosive bone destruction patterns.
    Pediatric Radiology 09/2008; 38(8):863-7. · 1.57 Impact Factor
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    ABSTRACT: We present two cases of granulocytic sarcoma of the cervical lymph nodes with central necrosis as an initial manifestation of childhood leukaemia, focusing on the imaging features. Recognition of the CT and MR imaging findings of granulocytic sarcoma involving the cervical lymph nodes assists the differential diagnosis of noninfective lymphadenopathy in children.
    Pediatric Radiology 07/2008; 38(6):685-7. · 1.57 Impact Factor
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    ABSTRACT: To evaluate the dynamic changes of the power Doppler (PD) in acute renal vein occlusion and recanalization in a canine model. We performed a PD of the kidney during graded renal vein occlusion and recanalization induced by balloon inflation and deflation in nine dogs. The PD images were transferred to a personal computer, and the PD signals were quantified. We observed the temporal change of the PD signal during renal vein occlusion and recanalization, with a decrease in the PD signal during occlusion and an increase during recanalization. The mean PD signal decreased gradually as the renal vein was occluded, and conversely increased gradually with sequential relief of occlusion. The sequential change of the mean value of the PD signal was statistically significant. The PD can detect a change in renal blood flow during acute renal vein occlusion and recanalization in a canine model. The PD may be used as a helpful tool for the early detection of acute renal vein thrombosis and the monitoring of renal perfusion.
    Korean Journal of Radiology 01/2008; 9(2):128-33. · 1.56 Impact Factor
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    ABSTRACT: The experimental or theoretical method that can visualize or quantify the architecture of bio-cake formed on the surface of membrane is of great interest in understanding biofouling mechanisms, also controlling biofouling in a membrane bioreactor (MBR). This paper summarizes the methods for determining the porosity of bio-cake experimentally or theoretically and also correlates the bio-cake architecture with membrane filterability in a submerged MBR under various operating conditions.
    Desalination. 01/2008; 231(1):115-123.
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    ABSTRACT: PURPOSE To evaluate whether MR perfusion can depict the postoperative as well preoperative hemodynamic status and whether MR perfusion performed after the indirect bypass operation can predict the further clinical outcomes of moyamoya syndrome patients. METHOD AND MATERIALS Seventy nine sets of 67 patients with MMS were studied with the use of MR perfusion with TTP and CBV as hemodynamic indicators. Data were analyzed by a quantitative regional analysis, in which the region of interest was segmented into 5 categories in preoperative and postoperative MR perfusion: ΔTTP values from over than 0 seconds, 2 seconds, 4 seconds, 6 seconds, and 8 seconds. And the postoperative clinical outcome of each patient was assigned to one of the following 4 categories on the last follow-up by their neurosurgeons: (1) excellent, (2) good, (3) fair, and (4) poor. The relationship between perfusion status and clinical outcomes was investigated. RESULTS Mean values of ΔTTP, rCBV, and number of pixels in the corresponding segmented region as a percentage of the total number of pixels in TTP perfusion maps decreased significantly after bypass surgery. Patients with higher level of Δ(ΔTTP) and more decrease in the extent of Δ(ΔTTP) after revascularization surgery in over than 0 seconds, over than 2 seconds, over than 4 seconds, and over than 6 seconds showed better clinical outcome with statistical significance. CONCLUSION The use of TTP and CBV perfusion maps can depict the preoperative hemodynamic status of patients with moyamoya syndrome and postoperative changes as well. We postulate that the TTP perfusion map performed after the revascularization surgery of the involved cerebral hemisphere can predict the further clinical outcomes of patients with moyamoya syndrome. CLINICAL RELEVANCE/APPLICATION The TTP and CBV perfusion maps can demonstrate the preoperative and post operative hemodynamic status and the post operative TTP perfusion map can predict the clinical outcomes of patients with moyamoya syndrome.
    Radiological Society of North America 2007 Scientific Assembly and Annual Meeting; 11/2007

Publication Stats

1k Citations
371.21 Total Impact Points

Institutions

  • 2011
    • Gachon University
      • Department of Radiology (College of Medical Science)
      Seongnam, Gyeonggi, South Korea
  • 1992–2010
    • Seoul National University Hospital
      • Department of Radiology
      Seoul, Seoul, South Korea
  • 1989–2008
    • Seoul National University
      • • Department of Chemical and Biological Engineering
      • • College of Medicine
      Sŏul, Seoul, South Korea
  • 2000
    • Hallym University Medical Center
      • Department of Radiology
      Seoul, Seoul, South Korea
    • Eulji University
      • Department of Radiology
      Seoul, Seoul, South Korea
  • 1998
    • Korea Institute of Science and Technology
      Sŏul, Seoul, South Korea
    • Inha University Hospital
      Sinhyeon, South Gyeongsang, South Korea
    • Ewha Womans University
      Sŏul, Seoul, South Korea
  • 1997
    • National Cancer Center Korea
      Kōyō, Gyeonggi Province, South Korea
  • 1995
    • International St. Mary's Hospitals
      Chemulpo, Incheon, South Korea