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https://www.readbyqxmd.com/read/28196208/effect-of-radiotherapy-on-painful-bone-metastases-a-secondary-analysis-of-the-ncic-clinical-trials-group-symptom-control-trial-sc-23
#1
Rachel McDonald, Keyue Ding, Michael Brundage, Ralph M Meyer, Abdenour Nabid, Pierre Chabot, Genevieve Coulombe, Shahida Ahmed, Joda Kuk, A Rashid Dar, Aamer Mahmud, Alysa Fairchild, Carolyn F Wilson, Jackson S Y Wu, Kristopher Dennis, Carlo DeAngelis, Rebecca K S Wong, Liting Zhu, Stephanie Chan, Edward Chow
Importance: Many studies that found improved quality of life (QOL) after radiotherapy of bone metastases have small sample sizes and do not use specific questionnaires. How soon after radiotherapy one can expect an improvement in QOL is unknown. Objective: To investigate QOL at days 10 and 42 after radiotherapy with a bone metastases-specific QOL tool. Design, Setting, and Participants: In this secondary analysis of the NCIC Clinical Trials Group Symptom Control Trial SC...
February 9, 2017: JAMA Oncology
https://www.readbyqxmd.com/read/28152511/concurrent-chemoradiotherapy-degrades-the-quality-of-life-of-patients-with-stage-ii-nasopharyngeal-carcinoma-as-compared-to-radiotherapy
#2
Xin-Bin Pan, Shi-Ting Huang, Kai-Hua Chen, Yan-Ming Jiang, Jia-Lin Ma, Song Qu, Ling Li, Long Chen, Xiao-Dong Zhu
The purpose of this study was to compare the quality of life (QoL) of stage II nasopharyngeal carcinoma (NPC) patients treated with radiotherapy (RT) versus concurrent chemoradiotherapy (CCRT). In a cross-sectional study, these patients were treated with RT (n = 55) or CCRT (n = 51) between June 2008 and June 2013. For all subjects, disease-free survival was more than 3 years. QoL was assessed using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30 (EORTC QLQ-C30) questions and the Head and Neck 35 (EORTC QLQ-H&N35) questions...
February 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28138304/radiation-therapy-and-cancer-control-in-developing-countries-can-we-save-more-lives
#3
REVIEW
Rajamanickam Baskar, Koji Itahana
Globally, morbidity and mortality due to cancer are predicted to increase in both men and women in the coming decades. Furthermore, it is estimated that two thirds of these cancer-related deaths will occur in low-and middle-income countries (LMIC). In addition to morbidity and mortality, cancer also causes an enormous economic burden, especially in developing countries. There are several treatment and management options for cancer including chemotherapy, radiation therapy, surgery, and palliative care. Radiotherapy or radiation therapy (RT) can be an effective treatment, especially for localized or solid cancers; about half of cancer patients receive radiation as a curative or palliative treatment...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/28134979/a-multiresolution-prostate-representation-for-automatic-segmentation-in-magnetic-resonance-images
#4
Charlens Alvarez, Fabio Martínez, Eduardo Romero
PURPOSE: Accurate prostate delineation is necessary in radiotherapy processes for concentrating the dose onto the prostate and reducing side effects in neighboring organs. Currently, manual delineation is performed over Magnetic Resonance Imaging (MRI) taking advantage of its high soft tissue contrast property. Nevertheless, since human intervention is a consuming task with high intra and inter-observer variability rates, (semi)-automatic organ delineation tools have emerged to cope with these challenges, reducing the time spent for these tasks...
January 30, 2017: Medical Physics
https://www.readbyqxmd.com/read/28134023/effects-of-ionizing-radiation-on-dna-methylation-from-experimental-biology-to-clinical-applications
#5
Isabelle R Miousse, Kristy R Kutanzi, Igor Koturbash
PURPOSE: Ionizing radiation (IR) is a ubiquitous environmental stressor with genotoxic and epigenotoxic capabilities. Terrestrial IR, predominantly a low-linear energy transfer (LET) radiation, is being widely utilized in medicine, as well as in multiple industrial applications. Additionally, an interest in understanding the effects of high-LET irradiation is emerging due to the potential of exposure during space missions and the growing utilization of LET radiation in medicine. CONCLUSIONS: In this review, we summarize the current knowledge of the effects of IR on DNA methylation, a key epigenetic mechanism regulating the expression of genetic information...
January 30, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28126595/global-proteome-and-phospho-proteome-analysis-of-merlin-deficient-meningioma-and-schwannoma-identifies-pdlim2-as-a-novel-therapeutic-target
#6
Kayleigh Bassiri, Sara Ferluga, Vikram Sharma, Nelofer Syed, Claire L Adams, Edwin Lasonder, C Oliver Hanemann
Loss or mutation of the tumour suppressor Merlin predisposes individuals to develop multiple nervous system tumours, including schwannomas and meningiomas, sporadically or as part of the autosomal dominant inherited condition Neurofibromatosis 2 (NF2). These tumours display largely low grade features but their presence can lead to significant morbidity. Surgery and radiotherapy remain the only treatment options despite years of research, therefore an effective therapeutic is required. Unbiased omics studies have become pivotal in the identification of differentially expressed genes and proteins that may act as drug targets or biomarkers...
January 18, 2017: EBioMedicine
https://www.readbyqxmd.com/read/28111859/cancer-control-a-global-perspective
#7
I Olver
Disparities in cancer control exist in low- and middle-income countries (LMICs). Many countries do not have cancer registries to record incidence, mortality and prevalence and are reliant on Globocan estimates of their cancer burden. Poorer cancer control within and between countries occurs in those living remotely from urban centres, those in a low socioeconomic group and some ethnic groups who have lifestyle and belief systems which impact on cancer control. High-income countries generally have population screening programmes for cervix, breast and bowel cancer...
January 2017: European Journal of Cancer Care
https://www.readbyqxmd.com/read/28102943/comparison-of-five-cluster-validity-indices-performance-in-brain-18-f-fet-pet-image-segmentation-using-k-means
#8
Bedor Abualhaj, Guoyang Weng, Melissa Ong, Ali Asgar Attarwala, Flavia Molina, Karen Büsing, Gerhard Glatting
PURPOSE: Dynamic [(18) F]fluoro-ethyl-L-tyrosine positron emission tomography ([(18) F]FET-PET) is used to identify tumor lesions for radiotherapy treatment planning, to differentiate glioma recurrence from radiation necrosis and to classify gliomas grading. To segment different regions in the brain k-means cluster analysis can be used. The main disadvantage of k-means is that the number of clusters must be pre-defined. In this study, we therefore compared different cluster validity indices for automated and reproducible determination of the optimal number of clusters based on the dynamic PET data...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28101834/management-of-acute-skin-toxicity-with-hypericum-perforatum-and-neem-oil-during-platinum-based-concurrent-chemo-radiation-in-head-and-neck-cancer-patients
#9
Pierfrancesco Franco, Monica Rampino, Oliviero Ostellino, Marina Schena, Giancarlo Pecorari, Paolo Garzino Demo, Massimo Fasolis, Francesca Arcadipane, Stefania Martini, Chiara Cavallin, Mario Airoldi, Umberto Ricardi
Acute skin toxicity is a frequent finding during combined radiotherapy and chemotherapy in head and neck cancer patients. Its timely and appropriate management is crucial for both oncological results and patient's global quality of life. We herein report clinical data on the use of Hypericum perforatum and neem oil in the treatment of acute skin toxicity during concurrent chemo-radiation for head and neck cancer. A consecutive series of 50 head and neck cancer patients undergoing concomitant radio-chemotherapy with weekly cisplatin was analyzed...
February 2017: Medical Oncology
https://www.readbyqxmd.com/read/28079267/estimating-4d-cbct-from-prior-information-and-extremely-limited-angle-projections-using-structural-pca-and-weighted-free-form-deformation-for-lung-radiotherapy
#10
Wendy Harris, You Zhang, Fang-Fang Yin, Lei Ren
PURPOSE: To investigate the feasibility of using structural-based principal component analysis (PCA) motion-modeling and weighted free-form deformation to estimate on-board 4D-CBCT using prior information and extremely limited angle projections for potential 4D target verification of lung radiotherapy. METHODS: A technique for lung 4D-CBCT reconstruction has been previously developed using a deformation field map (DFM)-based strategy. In the previous method, each phase of the 4D-CBCT was generated by deforming a prior CT volume...
January 12, 2017: Medical Physics
https://www.readbyqxmd.com/read/28057034/the-predictive-value-of-18-f-fdg-pet-ct-for-assessing-the-clinical-outcomes-in-locally-advanced-nsclc-patients-after-a-new-induction-treatment-low-dose-fractionated-radiotherapy-with-concurrent-chemotherapy
#11
Maria Vittoria Mattoli, Mariangela Massaccesi, Alessandra Castelluccia, Valentina Scolozzi, Giovanna Mantini, Maria Lucia Calcagni
BACKGROUND: Patients with locally advanced non-small-cell lung cancer (LA-NSCLC) have poor prognosis despite several multimodal approaches. Recently, low-dose fractionated radiotherapy concurrent to the induction chemotherapy (IC-LDRT) has been proposed to further improve the effects of chemotherapy and prognosis. Until now, the predictive value of metabolic response after IC-LDRT has not yet been investigated. AIM: to evaluate whether the early metabolic response, assessed by (18)F-fluoro-deoxyglucose positron emission-computed tomography ((18)F-FDG PET-CT), could predict the prognosis in LA-NSCLC patients treated with a multimodal approach, including IC-LDRT...
January 5, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28048596/su-f-t-248-fmea-risk-analysis-implementation-aapm-tg-100-in-total-skin-electron-irradiation-technique
#12
B Ibanez-Rosello, J Bautista-Ballesteros, J Bonaque, J Perez-Calatayud, A Gonzalez-Sanchis, J Lopez-Torrecilla, L Brualla-Gonzalez, T Garcia-Hernandez, A Vicedo-Gonzalez, D Granero, A Serrano, B Borderia, C Solera, J Rosello
PURPOSE: Total Skin Electron Irradiation (TSEI) is a radiotherapy treatment which involves irradiating the entire body surface as homogeneously as possible. It is composed of an extensive multi-step technique in which quality management requires high consumption of resources and a fluid communication between the involved staff, necessary to improve the safety of treatment. The TG-100 proposes a new perspective of quality management in radiotherapy, presenting a systematic method of risk analysis throughout the global flow of the stages through the patient...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048404/we-h-201-03-enthusiasm-and-generosity-of-spirit-necessitate-a-volunteering-structure-to-make-them-more-meaningful
#13
Y Pipman
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048395/we-fg-206-07-assessing-the-lung-function-of-patients-with-non-small-cell-lung-cancer-using-hyperpolarized-xenon-129-dissolved-phase-mri
#14
K Qing, J Mugler, Q Chen
PURPOSE: Hyperpolarized xenon-129 dissolved-phase MRI is the first imaging technique that allows 3-dimensional regional mapping of ventilation and gas uptake by tissue and blood the in human lung. Multiple outcome measures can be produced from this method. Existing studies in subjects with major lung diseases compared to healthy controls demonstrated high sensitivities of this method to pulmonary physiological factors including ventilation, alveolar tissue density, surface-to-volume ratio, pulmonary perfusion and gas-blood barrier thickness...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048297/th-ef-bra-08-a-novel-technique-for-estimating-volumetric-cine-mri-vc-mri-from-multi-slice-sparsely-sampled-cine-images-using-motion-modeling-and-free-form-deformation
#15
W Harris, F Yin, C Wang, Z Chang, J Cai, Y Zhang, L Ren
PURPOSE: To develop a technique to estimate on-board VC-MRI using multi-slice sparsely-sampled cine images, patient prior 4D-MRI, motion-modeling and free-form deformation for real-time 3D target verification of lung radiotherapy. METHODS: A previous method has been developed to generate on-board VC-MRI by deforming prior MRI images based on a motion model(MM) extracted from prior 4D-MRI and a single-slice on-board 2D-cine image. In this study, free-form deformation(FD) was introduced to correct for errors in the MM when large anatomical changes exist...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047816/su-g-jep3-04-estimating-4d-cbct-from-prior-information-and-extremely-limited-angle-projections-using-structural-pca-and-weighted-free-form-deformation
#16
W Harris, F Yin, Y Zhang, L Ren
PURPOSE: To investigate the feasibility of using structure-based principal component analysis (PCA) motion-modeling and weighted free-form deformation to estimate on-board 4D-CBCT using prior information and extremely limited angle projections for potential 4D target verification of lung radiotherapy. METHODS: A technique for lung 4D-CBCT reconstruction has been previously developed using a deformation field map (DFM)-based strategy. In the previous method, each phase of the 4D-CBCT was generated by deforming a prior CT volume...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047760/we-h-201-04-models-for-developing-medical-physics-educators-and-education-programs-in-the-developing-countries-and-the-potential-role-of-us-universities-and-individual-medical-physicists
#17
P Sprawls
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047638/su-f-p-09-a-global-medical-physics-collaboration-for-implementation-of-modern-radiotherapy-in-botswana
#18
R Makufa, M Bvochora-Nsingo, T Karumekayi, R J Schneider, J A Efstathiou, S Dryden-Peterson, A Odom, A Shulman, Y Pipman, D P Gierga
PURPOSE: The global burden of cancer is considerable, particularly in low and middle-income countries. Massachusetts General Hospital (MGH) and Botswana-Harvard AIDS Institute have partnered with the oncology community and government of Botswana to form BOTSOGO (BOTSwana Oncology Global Outreach) to address the rising burden of cancer in Botswana. Currently, radiation therapy (RT) is only available at a single linear accelerator (LINAC) in Gaborone Private Hospital (GPH). BOTSOGO worked to limit the absence of RT during a LINAC upgrade and ensure a safe transition to modern radiotherapy techniques...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047637/we-h-201-00-opportunities-for-physicists-to-support-low-and-mid-income-countries
#19
Julianne Pollard
: The desperate need for radiotherapy in low and mid-income countries (LMICs) has been well documented. Roughly 60 % of the worldwide incidence of cancer occurs in these resource-limited settings and the international community alongside governmental and non-profit agencies have begun publishing reports and seeking help from qualified volunteers. However, the focus of several reports has been on how dire the situation is and the magnitude of the problem, leaving most to feel overwhelmed and unsure as to how to help and why to get involved...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047524/su-f-p-05-initial-experience-with-an-independent-certification-program-for-stereotactic-radiosurgery-and-stereotactic-body-radiation-therapy
#20
T Solberg, J Robar, T Gevaert, M Todorovic, J Howe
PURPOSE: The ASTRO document "Safety is no accident: A FRAMEWORK FOR QUALITY RADIATION ONCOLOGY AND CARE" recommends external reviews of specialized modalities. The purpose of this presentation is to describe the implementation of such a program for Stereotactic Radiosurgery (SRS) and Stereotactic Body radiation Therapy (SBRT). METHODS: The margin of error for SRS and SBRT delivery is significantly smaller than that of conventional radiotherapy and therefore requires special attention and diligence...
June 2016: Medical Physics
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