James A Hayman

University of Michigan, Ann Arbor, Michigan, United States

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Publications (160)673.56 Total impact

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    ABSTRACT: In 1999, the Institute of Medicine (IOM) published Ensuring Quality Cancer Care, an influential report that described an ideal cancer care system and issued ten recommendations to address pervasive gaps in the understanding and delivery of quality cancer care. Despite generating much fervor, the report's recommendations-including two recommendations related to quality measurement-remain largely unfulfilled. Amidst continuing concerns regarding increasing costs and questionable quality of care, the IOM charged a new committee with revisiting the 1999 report and with reassessing national cancer care, with a focus on the aging US population. The committee identified high-quality patient-clinician relationships and interactions as central drivers of quality and attributed existing quality gaps, in part, to the nation's inability to measure and improve cancer care delivery in a systematic way. In 2013, the committee published its findings in Delivering High-Quality Cancer Care: Charting a New Course for a System in Crisis, which included two recommendations that emphasize coordinated, patient-centered quality measurement and information technology enhancements: Develop a national quality reporting program for cancer care as part of a learning health care system; and,Develop an ethically sound learning health care information technology system for cancer that enables real-time analysis of data from cancer patients in a variety of care settings. These recommendations underscore the need for independent national oversight, public-private collaboration, and substantial funding to create robust, patient-centered quality measurement and learning enterprises to improve the quality, accessibility, and affordability of cancer care in America.
    Healthcare : the journal of delivery science and innovation. 03/2014; 2(1):53-62.
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    ABSTRACT: Merkel cell carcinoma (MCC) is a rare malignancy of the skin, and prospective randomized clinical studies on management and treatment are very limited. The NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) for MCC provide up-to-date, best evidence-based, and consensus-driven management pathways with the purpose of providing best care and outcomes. Multidisciplinary management with consensus treatment recommendations to individualize patient care within the framework of these guidelines is optimal. The University of Michigan multidisciplinary MCC program uses NCCN Guidelines in the management and treatment of its patients. This article discusses 4 patient presentations to highlight the implementation of the NCCN Guidelines for MCC at the University of Michigan.
    Journal of the National Comprehensive Cancer Network: JNCCN 03/2014; 12(3):434-41. · 5.11 Impact Factor
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    ABSTRACT: Purpose To report the final cosmetic results from a single-arm prospective clinical trial evaluating accelerated partial breast irradiation (APBI) using intensity modulated radiation therapy (IMRT) with active-breathing control (ABC). Methods and Materials Women older than 40 with breast cancer stages 0-I who received breast-conserving surgery were enrolled in an institutional review board-approved prospective study evaluating APBI using IMRT administered with deep inspiration breath-hold. Patients received 38.5 Gy in 3.85-Gy fractions given twice daily over 5 consecutive days. The planning target volume was defined as the lumpectomy cavity with a 1.5-cm margin. Cosmesis was scored on a 4-category scale by the treating physician. Toxicity was scored according to National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE version 3.0). We report the cosmetic and toxicity results at a median follow-up of 5 years. Results A total of 34 patients were enrolled. Two patients were excluded because of fair baseline cosmesis. The trial was terminated early because fair/poor cosmesis developed in 7 of 32 women at a median follow-up of 2.5 years. At a median follow-up of 5 years, further decline in the cosmetic outcome was observed in 5 women. Cosmesis at the time of last assessment was 43.3% excellent, 30% good, 20% fair, and 6.7% poor. Fibrosis according to CTCAE at last assessment was 3.3% grade 2 toxicity and 0% grade 3 toxicity. There was no correlation of CTCAE grade 2 or greater fibrosis with cosmesis. The 5-year rate of local control was 97% for all 34 patients initially enrolled. Conclusions In this prospective trial with 5-year median follow-up, we observed an excellent rate of tumor control using IMRT-planned APBI. Cosmetic outcomes, however, continued to decline, with 26.7% of women having a fair to poor cosmetic result. These results underscore the need for continued cosmetic assessment for patients treated with APBI by technique.
    International journal of radiation oncology, biology, physics 01/2014; · 4.59 Impact Factor
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    ABSTRACT: Background Diffusion MRI, although having the potential to be a biomarker for early assessment of tumor response to therapy, could be confounded by edema and necrosis in or near the brain tumors. This study aimed to develop and investigate the ability of the diffusion abnormality index (DAI) to be a new imaging biomarker for early assessment of brain metastasis response to radiation therapy (RT).Methods Patients with either radiosensitive or radioresistant brain metastases that were treated by whole brain RT alone or combined with bortezomib as a radiation sensitizer had diffusion-weighted (DW) MRI pre-RT and 2 weeks (2W) after starting RT. A patient-specific diffusion abnormality probability function (DAProF) was created to account for abnormal low and high apparent diffusion coefficients differently, reflecting respective high cellularity and edema/necrosis. The DAI of a lesion was then calculated by the integral of DAProF-weighted tumor apparent diffusion coefficient histogram. The changes in DAI from pre-RT to 2W were evaluated for differentiating the responsive, stable, and progressive tumors and compared with the changes in gross tumor volume and conventional diffusion metrics during the same time interval.ResultsIn lesions treated with whole brain RT, the DAI performed the best among all metrics in predicting the posttreatment response of brain metastases to RT. In lesions treated with whole brain RT + bortezomib, although DAI was the best predictor, the performance of all metrics worsened compared with the first group.Conclusions The ability of DAI for early assessment of brain metastasis response to RT depends upon treatment regimes.
    Neuro-Oncology 12/2013; · 6.18 Impact Factor
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    ABSTRACT: Survival of patients with brain metastasis particularly from historically more radio-resistant malignancies remains dismal. A phase I study of concurrent bortezomib and whole brain radiotherapy was conducted to determine the tolerance and safety of this approach in patients with previously untreated brain metastasis. A phase I dose escalation study evaluated the safety of bortezomib (0.9, 1.1, 1.3, 1.5, and 1.7 mg/m2) given on days 1, 4, 8 and 11 of whole brain radiotherapy. Patients with confirmed brain metastasis were recruited for participation. The primary endpoint was the dose-limiting toxicity, defined as any >= grade 3 non-hematologic toxicity or grade >= 4 hematologic toxicity from the start of treatment to one month post irradiation. Time-to-Event Continual Reassessment Method (TITE-CRM) was used to determine dose escalation. A companion study of brain diffusion tensor imaging MRI was conducted on a subset of patients to assess changes in the brain that might predict delayed cognitive effects. Twenty-four patients were recruited and completed the planned therapy. Patients with melanoma accounted for 83% of all participants. The bortezomib dose was escalated as planned to the highest dose of 1.7 mg/m2/dose. No grade 4/5 toxicities related to treatment were observed. Two patients had grade 3 dose-limiting toxicities (hyponatremia and encephalopathy). A partial or minor response was observed in 38% of patients. Bortezomib showed greater demyelination in hippocampus-associated white matter structures on MRI one month after radiotherapy compared to patients not treated with bortezomib (increase in radial diffusivity +16.8% versus 4.8%; p = 0.0023). Concurrent bortezomib and whole brain irradiation for brain metastasis is well tolerated at one month follow-up, but MRI changes that have been shown to predict delayed cognitive function can be detected within one month of treatment.
    Radiation Oncology 08/2013; 8(1):204. · 2.11 Impact Factor
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    ABSTRACT: PURPOSEAlthough radiation therapy (RT) can palliate symptoms and may prolong life, it is not curative for patients with metastatic lung cancer. We investigated patient expectations about the goals of RT for incurable lung cancers. PATIENTS AND METHODS The Cancer Care Outcomes Research and Surveillance Consortium enrolled a population- and health system-based cohort of patients diagnosed with lung cancer from 2003 to 2005. We identified patients with stage wet IIIB or IV lung cancer who received RT and answered questions on their expectations about RT. We assessed patient expectations about the goals of RT and identified factors associated with inaccurate beliefs about cure.ResultsIn all, 384 patients completed surveys on their expectations about RT. Seventy-eight percent of patients believed that RT was very or somewhat likely to help them live longer, and 67% believed that RT was very or somewhat likely to help them with problems related to their cancer. However, 64% did not understand that RT was not at all likely to cure them. Older patients and nonwhites were more likely to have inaccurate beliefs, and patients whose surveys were completed by surrogates were less likely to have inaccurate beliefs. Ninety-two percent of patients with inaccurate beliefs about cure from RT also had inaccurate beliefs about chemotherapy. CONCLUSION Although patients receiving RT for incurable lung cancer believe it will help them, most do not understand that it is not at all likely to cure their disease. This indicates a need to improve communication regarding the goals and limitations of palliative RT.
    Journal of Clinical Oncology 06/2013; · 18.04 Impact Factor
  • Reshma Jagsi, James Hayman
    CancerSpectrum Knowledge Environment 05/2013; · 14.07 Impact Factor
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    ABSTRACT: The NCCN Clinical Practice Guidelines in Oncology for Gastric Cancer provide evidence- and consensus-based recommendations for a multidisciplinary approach for the management of patients with gastric cancer. For patients with resectable locoregional cancer, the guidelines recommend gastrectomy with a D1+ or a modified D2 lymph node dissection (performed by experienced surgeons in high-volume centers). Postoperative chemoradiation is the preferred option after complete gastric resection for patients with T3-T4 tumors and node-positive T1-T2 tumors. Postoperative chemotherapy is included as an option after a modified D2 lymph node dissection for this group of patients. Trastuzumab with chemotherapy is recommended as first-line therapy for patients with HER2-positive advanced or metastatic cancer, confirmed by immunohistochemistry and, if needed, by fluorescence in situ hybridization for IHC 2+.
    Journal of the National Comprehensive Cancer Network: JNCCN 05/2013; 11(5):531-546. · 5.11 Impact Factor
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    ABSTRACT: BACKGROUND: Little uniformity exists in the clinical and histologic variables reported with primary Merkel cell carcinoma (MCC). OBJECTIVE: To provide a rigorous descriptive analysis of a contemporary cohort and promote the prospective collection of detailed data on MCC for future outcome studies. METHODS AND MATERIALS: A detailed descriptive analysis was performed for clinical and histologic features of 147 patients with 150 primary MCC tumors in a prospectively collected database from 2006 to 2010. RESULTS: The majority (73.5%) of patients were at American Joint Committee on Cancer clinical stage I or II at presentation, 20.4% at stage III, and 6.1% at stage IV. Detailed descriptive clinical and histologic findings are presented. CONCLUSION: Clinical and histologic profiling of primary MCC in the literature is variable and limited. Systematic prospective collection of MCC data is needed for future outcome studies and the ability to compare and share data from multiple sources for this relatively rare tumor.
    Dermatologic Surgery 04/2013; · 1.87 Impact Factor
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    ABSTRACT: INTRODUCTION:: We hypothesized that radiation-induced thoracic toxicity (RITT) of the lung, esophagus and pericardium share a similar mechanism, and aimed to examine whether genetic variation of transforming growth factor-beta1 (TGFβ1), tissue plasminogen activator (tPA) and angiotensin converting enzyme (ACE), are associated with RITT in patients with non-small-cell lung cancer (NSCLC). METHODS:: Patients with stage I-III NSCLC were enrolled and received radiotherapy (RT). Blood samples were obtained pre-RT and at 4 to 5 weeks during RT, and plasma TGF-β1 was measured using an enzyme-linked immunosorbent assay. The DNA samples extracted from blood pre-RT were analyzed for the following frequent genetic variations: TGFβ1 509C/T, tPA -7351 C/T, and ACE I/D. RITT score was defined as the sum of radiation-induced toxicity grades in esophagus, lung, and pericardium. RESULTS:: Seventy-six NSCLC patients receiving definitive RT were enrolled. Patients with TGFβ1 509CC had higher mean grade of esophagitis (1.4 ± 0.2 versus 0.8 ± 0.2, p = 0.019) and RITT score (2.6 ± 0.3 versus 1.6 ± 0.3, p = 0.009) than T allele carriers. Although no significant relationship was observed between RITT and the tPA or ACE variants individually, patients with any high-risk alleles (tPA CC or ACE D or TGFβ1 509CC) had significantly higher grade of developing combined RITT (p < 0.001). Patients with TGFβ1 509CC had greater increase of plasma TGF β1 levels at 4 to 5 weeks during RT than T allele carriers did (CC 1.2 ± 0.2 versus T 0.7 ± 0.1, p = 0.047). CONCLUSION:: This exploratory study demonstrated that sensitivity of radiation toxicity may be determined by genomic factors associated with TGFβ1 and genes involved in TGFβ1 pathway.
    Journal of thoracic oncology: official publication of the International Association for the Study of Lung Cancer 02/2013; 8(2):208-213. · 4.55 Impact Factor
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    ABSTRACT: PURPOSERandomized data suggest that single-fraction or short-course palliative radiation therapy (RT) is sufficient in the majority of patients with metastatic cancer. We investigated population-based patterns in the use of palliative RT among patients with metastatic non-small-cell lung cancer (NSCLC). PATIENTS AND METHODS From patients diagnosed with lung cancer from 2003 to 2005 at a participating geographic or organizational site and who consented to the Cancer Care Outcomes Research and Surveillance Consortium study, we identified patients with metastatic NSCLC who had complete medical records abstractions. Patient characteristics and clinical factors associated with receipt of palliative RT and RT intensity (total dose and number of treatments) were evaluated with multivariable regression.ResultsOf 1,574 patients with metastatic NSCLC, 780 (50%) received at least one course of RT, and 21% and 12% received RT to the chest and bone, respectively. Use of palliative RT was associated with younger age at diagnosis and receipt of chemotherapy and surgery to metastatic sites. Among patients receiving palliative bone RT, only 6% received single-fraction treatment. Among patients receiving palliative chest RT, 42% received more than 20 fractions. Patients treated in integrated networks were more likely to receive lower doses and fewer fractions to the bone and chest. CONCLUSION When palliative RT is used in patients with metastatic NSCLC, a substantial proportion of patients receive a greater number of treatments and higher doses than supported by current evidence, suggesting an opportunity to improve care delivery.
    Journal of Clinical Oncology 01/2013; · 18.04 Impact Factor
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    ABSTRACT: Small cell lung cancer is an aggressive malignancy that is highly responsive to radiation therapy (RT), which has an important role in all stages of disease. For locally advanced, limited-stage disease, the standard of care is chemotherapy with concurrent radiation, which should be started early. The optimal radiation dose and field design remain to be determined. Randomized trials are currently being conducted to determine if dose intensification will improve outcomes, whereas consensus on elective nodal irradiation is evolving. Current studies are evaluating the potential benefit of consolidative thoracic RT in the management of patients with extensive-stage disease that has responded favorably to chemotherapy. Finally, prophylactic cranial irradiation improves survival in both limited- and extensive-stage disease that has responded to initial therapy.
    Journal of the National Comprehensive Cancer Network: JNCCN 01/2013; 11(1):107-14. · 5.11 Impact Factor
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    ABSTRACT: Multidisciplinary tumor board conferences foster collaboration among health care providers from a variety of specialties and help to facilitate optimal patient care. Typical cases from thoracic tumor board conferences include patients with known or suspected bronchogenic and esophageal carcinomas, as well as less common diseases such as thymomas and mesotheliomas. In most instances, the clinical questions revolve around the best options for establishing a diagnosis, staging the disease and directing treatment. This article describes and illustrates the clinical scenarios of three patients who were presented at our tumor board, focusing on management issues and the role of imaging. These patients had non-small cell lung cancer and mediastinal lymph node metastases; a small, growing ground glass nodule; and oligometastatic non-small cell lung cancer, respectively.
    Cancer Imaging 01/2013; 13(3):1-11. · 1.59 Impact Factor
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    ABSTRACT: Multidisciplinary tumor board conferences foster collaboration among health care providers from a variety of specialties and help to facilitate optimal patient care. Generally, the clinical questions revolve around the best options for establishing a diagnosis, staging the disease and directing treatment. This article describes and illustrates the clinical scenarios of three patients who were presented at our thoracic Tumor Board, focusing on management issues and the role of imaging. These patients had invasive thymoma; concurrent small cell lung cancer and non-small cell lung cancer; and esophageal cancer with celiac lymph node metastases, respectively.
    Cancer Imaging 01/2013; 13(3):298-305. · 1.59 Impact Factor
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    ABSTRACT: To investigate the plasma dynamics of 5 proinflammatory/fibrogenic cytokines, including interleukin-1beta (IL-1β), IL-6, IL-8, tumor necrosis factor alpha (TNF-α), and transforming growth factor beta1 (TGF-β1) to ascertain their value in predicting radiation-induced lung toxicity (RILT), both individually and in combination with physical dosimetric parameters. Treatments of patients receiving definitive conventionally fractionated radiation therapy (RT) on clinical trial for inoperable stages I-III lung cancer were prospectively evaluated. Circulating cytokine levels were measured prior to and at weeks 2 and 4 during RT. The primary endpoint was symptomatic RILT, defined as grade 2 and higher radiation pneumonitis or symptomatic pulmonary fibrosis. Minimum follow-up was 18 months. Of 58 eligible patients, 10 (17.2%) patients developed RILT. Lower pretreatment IL-8 levels were significantly correlated with development of RILT, while radiation-induced elevations of TGF-ß1 were weakly correlated with RILT. Significant correlations were not found for any of the remaining 3 cytokines or for any clinical or dosimetric parameters. Using receiver operator characteristic curves for predictive risk assessment modeling, we found both individual cytokines and dosimetric parameters were poor independent predictors of RILT. However, combining IL-8, TGF-ß1, and mean lung dose into a single model yielded an improved predictive ability (P<.001) compared to either variable alone. Combining inflammatory cytokines with physical dosimetric factors may provide a more accurate model for RILT prediction. Future study with a larger number of cases and events is needed to validate such findings.
    International journal of radiation oncology, biology, physics 10/2012; 84(2):e217-22. · 4.59 Impact Factor
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    ABSTRACT: Our main purpose is to study the pattern of local failure for patients with non-small cell lung cancer treated with conformal therapy. This study included patients who failed locally and a matched group without failures after 3D conformal radiation per a radiation dose-escalation trial. Radiation doses ranged from 65.1 to 102.9 Gy in 2.1 Gy fractions, originally computed using an equivalent path length algorithm. The recurrent gross target volumes (RGTV) were contoured. The original and recurrent planning target volume (PTV and RPTV) were generated by 1 cm uniform expansion from GTV. DVHs and generalized equivalent uniform doses (EUD={Σ i (di ) (a) }(1/a) ) were computed. Marginal failures were defined for RGTVs covered by the original 10 to 90 % isodose surfaces. There were no significant differences between the failed and control groups with regard to average original GTV volumes, GTV and PTV doses, and minimum PTV doses. Of the 18 RGTVs, four had marginal failure, 12 failed mostly within, and two failed outside of the original PTV. The mean EUDs were 57.1 Gy (95 % confidence interval (CI) 43.9-70.6) and 47.5 Gy (95 % CI 33.7-61.2), for the RGTVs and RPTVs, respectively, significantly below the prescribed doses (p=0.03). EUDs were less than 60 Gy for 39 % of the RGTVs and 56 % of the RPTVs. Recurrent tumors had significantly lower doses than the prescribed dose suggesting that some of these failures could have been avoided with modern technology such as 4D CT simulation and image-guided radiation therapy.
    Journal of radiation oncology. 09/2012; 1(3):267-272.
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    ABSTRACT: BACKGROUND: Radiation therapy's (RT's) effects on cardiac implantable electronic devices (CIEDs) such as implantable cardioverter-defibrillators (ICDs) and pacemakers (PMs) are not well established, leading to device removal or relocation in preparation for RT. OBJECTIVE: To determine the rate of CIED malfunction in patients undergoing RT by using a novel protocol. METHODS: We analyzed 69 patients-50 (72%) with PMs and 19 (28%) with CIEDs-receiving RT at the University of Michigan. Collected data included device model, anatomic location, and treatment beam energies, treatment type, and estimated dose to the device. Patients were treated with either high-energy (16-MV) and/or low-energy (6 MV) photon beams with or without electron beams (6-16 MeV). The devices were interrogated with pre- and post-RT and/or weekly with either in-treatment or home interrogation, depending on the patient's dependence on the device and the estimated or measured delivered dose. Outcomes analyzed were inappropriate ICD therapies, device malfunctions, or device-related clinical events. RESULTS: The PMs were exposed to 84.4±99.7 cGy of radiation, and the ICDs were exposed to 92.1±72.6 cGy of radiation. Two patients with ICDs experienced a partial reset of the ICD with the loss of historic diagnostic data after receiving 123 and 4 cGy, respectively. No device malfunction or premature battery depletion was observed at 6-month follow-up from RT completion. CONCLUSIONS: CIED malfunction due to indirect RT exposure is uncommon. Regular in-treatment or home interrogation should be done to detect and treat these events and to ensure that diagnostic data are preserved.
    Heart rhythm: the official journal of the Heart Rhythm Society 08/2012; · 4.56 Impact Factor
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    ABSTRACT: Introduction This phase II trial investigated chemoradiation followed by surgery and 2 years of adjuvant tetrathiomolybdate (TM) for resectable esophageal cancer. Methods Patients with resectable, locally advanced esophageal cancer received neoadjuvant cisplatin 60 mg/m(2) (days 1 and 22), paclitaxel 60 mg/m(2) (days 1, 8, 15, and 22), and 45 Gy hyperfractionated radiotherapy for 3 weeks followed by transhiatal esophagectomy. TM 20 mg PO QD was started 4 weeks post-op, and continued for 2 years to maintain the ceruloplasmin level between 5 and 15 mg/dl. Results Sixty-nine patients were enrolled (median age, 60 years). Sixty-six patients underwent surgery and 61 patients had a complete resection. Histologic complete response rate was 10 %. Twenty-one patients did not receive TM (metastases noted in the peri-operative period, prolonged post-operative recovery time, or patient refusal). Forty-eight patients started TM; 14 completed 24 months of treatment, 11 completed 10-18 months, 15 completed 2-8 months, and 8 completed ≤1 month. Twenty-seven patients had disease recurrence. With a median follow-up of 55 months, 25 patients were alive without disease, 1 was alive with disease, and 43 have died. Three-year recurrence-free survival was 44 % (95 % CI, 32-55 %) and the three-year overall survival was 45 % (95 % CI 33-56 %). Conclusions TM is an antiangiogenic agent that is well tolerated in the adjuvant setting. Disease-free survival and overall survival are promising when compared to historical controls treated at our institution with a similar regimen that did not include TM. However, the challenges associated with prolonged administration limit further investigation.
    Investigational New Drugs 07/2012; · 3.50 Impact Factor
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    ABSTRACT: Purpose: To assess the effectiveness of the management of patients with cardiac electronic implantable devices (CEIDS) receiving radiotherapy.Method and Materials: In 2005, a formal communication process was established between Radiation Oncology and Cardiac Electrophysiology (EP) for the management of patients with permanent, implantable cardiac devices receiving radiotherapy. The process requires a pre-treatment consult with EP. This information is provided to a medical physicist, who works with the primary radiation oncologist and dosimetrist. Based on the estimated dose to the device, EP and Radiation Oncology will determine the appropriate oversight required for treatment. To assess the effectiveness of this program, a retrospective analysis of patients with implantable cardiac devices receiving radiotherapy between the years 2005 and 2011 was performed. Results: Sixty-nine patients with CEIDs (19 implantable cardioverter defibrillators (ICDs) and 50 pacemakers) were treated in Radiation Oncology between 2005 and 2011. Patients were treated to a variety of sites, including 21 patients treated to multiple sites. Doses were estimated prior to radiotherapy, and in vivo measurements were obtained for patients near or exceeding our institutional device tolerance (ICDs = 1 Gy and ICPs = 2 Gy), or if the device was less than 10 cm from the edge of a treatment field. Of the patients evaluated, there were only two patients with ICD devices which had a partial reset of diagnostic data during their treatment. There were no major device failures of arrhythmia detection or treatment. Conclusions: Our multi-disciplinary team has worked together to develop a process to manage the care of patients with permanent implantable cardiac devices. There have been few device events noted in our patient cohort. The team will continue to follow our institutional management methodology to assess the appropriate amount of EP care necessary during radiation therapy. Laura Horwood is on the speakers bureau for Medtronic. Frank Pelosi is on the advisory board for Boston Scientific Corp and St. Jude Medical, is receiving an educational grants from Medtronic, St Jude, Boston Scientific, Biotronik, and a research grants from Medtronic.
    Medical Physics 06/2012; 39(6):3745. · 2.91 Impact Factor
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    ABSTRACT: Purpose: To develop an image analysis framework to delineate the physiological imaging-defined subvolumes of a tumor in relating to treatment response and outcome. Methods: Our proposed approach is designed to delineate subvolumes of a tumor based upon its heterogeneous distributions of physiological imaging parameters. The method assigns each voxel a probabilistic membership function belonging to the physiological parameter classes based upon a sample of tumors, and then calculates the related subvolumes for each tumor. We applied our approach to regional cerebral blood volume (rCBV) and Gd-DTAP transfer constant (Ktrans) images of patients who had brain metastases and were treated by whole brain radiation therapy (WBRT). Forty five lesions were included in the analysis. Changes in the rCBV (or Ktrans)-defined subvolumes of the tumors from pre RT to 2 weeks (2W) after the start of WBRT were evaluated for differentiation of responsive, stable and non-responsive tumors using Mann-Whitney U test. Performance of the newly developed metrics for predicting tumor response to WBRT was evaluated by Receiver Operating Characteristic (ROC) analysis. Results: The percentage decrease in the high-CBV defined subvolumes of the tumors from pre-RT to 2W was significantly greater in the group of responsive tumors than in the group of stable and nonresponsive ones (p<0.007). The change in the high-CBV defined subvolumes of the tumors from pre-RT to 2W was a predictor for post-RT response significantly better than the change in gross tumor volume observed during the same time interval (p=0.0124), suggesting the physiological change occurs prior to the volumetric change. Also, Ktrans did not add significant discriminatory information for assessing response with respect to rCBV. Conclusions: The physiological imaging-defined subvolumes of the tumors delineated by our method have the potential to be a new imaging response-predictor and a candidate for intensified treatment. NIH grant RO1 NS064973.
    Medical Physics 06/2012; 39(6):3947. · 2.91 Impact Factor

Publication Stats

3k Citations
673.56 Total Impact Points

Institutions

  • 1998–2014
    • University of Michigan
      • Department of Radiation Oncology
      Ann Arbor, Michigan, United States
  • 1999–2012
    • Concordia University–Ann Arbor
      Ann Arbor, Michigan, United States
  • 2011
    • Peter MacCallum Cancer Centre
      Melbourne, Victoria, Australia
  • 2009
    • Tianjin Medical University Cancer Institute and Hospital
      T’ien-ching-shih, Tianjin Shi, China
  • 2008–2009
    • Fudan University
      Shanghai, Shanghai Shi, China
    • Maria Sklodowska Curie Memorial Cancer Centre
      Gleiwitz, Silesian Voivodeship, Poland
  • 2005–2006
    • Johns Hopkins Bloomberg School of Public Health
      Baltimore, Maryland, United States
  • 2004
    • Johns Hopkins University
      Baltimore, Maryland, United States
    • University of California, Davis
      • Department of Radiation Oncology
      Davis, CA, United States
  • 2003
    • Netherlands Cancer Institute
      • Department of Radiotherapy
      Amsterdamo, North Holland, Netherlands
  • 1997
    • Dana-Farber Cancer Institute
      • Center for Outcomes and Policy Research
      Boston, MA, United States