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https://www.readbyqxmd.com/read/28351523/quality-assessment-of-delineation-and-dose-planning-of-early-breast-cancer-patients-included-in-the-randomized-skagen-trial-1
#1
Giulio Francolini, Mette S Thomsen, Esben S Yates, Carine Kirkove, Ingelise Jensen, Egil S Blix, Claus Kamby, Mette H Nielsen, Mechthild Krause, Martin Berg, Ingvil Mjaaland, Andreas Schreiber, Unn-Miriam Kasti, Kristian Boye, Birgitte V Offersen
BACKGROUND AND PURPOSE: To report on a Quality assessment (QA) of Skagen Trial 1, exploring hypofractionation for breast cancer patients with indication for regional nodal radiotherapy. MATERIAL AND METHODS: Deviations from protocol regarding target volume delineations and dose parameters (Dmin, Dmax, D98%, D95% and D2%) from randomly selected dose plans were assessed. Target volume delineation according to ESTRO guidelines was obtained through atlas based automated segmentation and centrally approved as gold standard (GS)...
March 25, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28325248/bridging-innovation-and-outreach-to-overcome-global-gaps-in-radiation-oncology-through-information-and-communication-tools-trainee-advancement-engaging-industry-attention-to-ethical-challenges-and-political-advocacy
#2
REVIEW
Luqman Dad, Trevor J Royce, Zachary Morris, Meena Moran, Todd Pawlicki, Deepak Khuntia, Patricia Hardenbergh, Bernard Cummings, Nina Mayr, Kenneth Hu
An evolving paradigm in global outreach in radiation oncology has been the implementation of a more region-specific, needs-based approach to help close the gap in radiation services to low- and middle-income countries through the use of innovative tools in information and communication technology. This report highlights 4 information and communication technology tools in action today: (1) the NCCN Framework for Resource Stratification of NCCN guidelines, (2) ASTRO e-Contouring, (3) i.treatsafely.org, and (4) ChartRounds...
April 2017: Seminars in Radiation Oncology
https://www.readbyqxmd.com/read/28301492/variability-in-target-delineation-of-cervical-carcinoma-a-korean-radiation-oncology-group-study-krog-15-06
#3
Ji Hyeon Joo, Young Seok Kim, Byung Chul Cho, Chi Young Jeong, Won Park, Hak Jae Kim, Won Sup Yoon, Mee Sun Yoon, Ji-Yoon Kim, Jin Hwa Choi, Youngmin Choi, Joo-Young Kim
PURPOSE: To determine inter-observer variability in target volume definition of cervical cancer in radical and adjuvant radiotherapy (RT) settings. METHODS: Eight physicians contoured CTVs of 2 patients underwent definitive and postoperative RT. Each volume was analyzed using the individual/median volume ratio and generalized conformity index (CIgen). And center of mass (COM) of each contour was calculated. Expert agreement was quantified using an expectation maximization algorithm for Simultaneous Truth and Performance Level Estimation (STAPLE)...
2017: PloS One
https://www.readbyqxmd.com/read/28297341/assessment-of-monte-carlo-algorithm-for-compliance-with-rtog-0915-dosimetric-criteria-in-peripheral-lung-cancer-patients-treated-with-stereotactic-body-radiotherapy
#4
Damodar Pokhrel, Sumit Sood, Rajeev Badkul, Hongyu Jiang, Christopher McClinton, Christopher Lominska, Parvesh Kumar, Fen Wang
The purpose of the study was to evaluate Monte Carlo-generated dose distributions with the X-ray Voxel Monte Carlo (XVMC) algorithm in the treatment of peripheral lung cancer patients using stereotactic body radiotherapy (SBRT) with non-protocol dose-volume normalization and to assess plan outcomes utilizing RTOG 0915 dosimetric compliance criteria. The Radiation Therapy Oncology Group (RTOG) protocols for non-small cell lung cancer (NSCLC) currently require radiation dose to be calculated using tissue density heterogeneity corrections...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28262474/multi-institutional-randomized-trial-testing-the-utility-of-an-interactive-three-dimensional-contouring-atlas-among-radiation-oncology-residents
#5
Erin F Gillespie, Neil Panjwani, Daniel W Golden, Jillian Gunther, Tobias R Chapman, Jeffrey V Brower, Robert Kosztyla, Grant Larson, Pushpa Neppala, Vitali Moiseenko, Julie Bykowski, Parag Sanghvi, James D Murphy
PURPOSE: The delivery of safe and effective radiation therapy relies on accurate target delineation, particularly in the era of highly conformal treatment techniques. Current contouring resources are fragmented and can be cumbersome to use. The present study reports on the efficacy and usability of a web-based contouring atlas compared with those of existing contouring resources in a randomized trial. METHODS AND MATERIALS: We enrolled radiation oncology residents into a 2-phase contouring study...
December 9, 2016: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28203163/is-the-deep-inspiration-breath-hold-technique-superior-to-the-free-breathing-technique-in-cardiac-and-lung-sparing-while-treating-both-left-sided-post-mastectomy-chest-wall-and-supraclavicular-regions
#6
Anupama Darapu, Rajesh Balakrishnan, Patricia Sebastian, Mohamathu Rafic Kather Hussain, Paul Ravindran, Subhashini John
AIMS: To evaluate the efficacy of the deep inspirational breath-hold (DIBH) technique and its dosimetric advantages over the free breathing (FB) technique in cardiac (heart and left anterior descending artery [LAD]) and ipsilateral lung sparing in left-sided post-mastectomy field-in-field conformal radiotherapy. DIBH is highly reproducible, and this study aims to find out its dosimetric benefits over FB. MATERIALS AND METHODS: Nineteen left-sided mastectomy patients were immobilized using breast boards with both arms positioned above the head...
January 2017: Case Reports in Oncology
https://www.readbyqxmd.com/read/28179749/danish-translation-and-linguistic-validation-of-the-body-q-a-description-of-the-process
#7
Lotte Poulsen, Michael Rose, Anne Klassen, Kirsten K Roessler, Jens Ahm Sørensen
BACKGROUND: Patient-reported outcome (PRO) instruments are increasingly being included in research and clinical practice to assess the patient point of view. Bariatric and body contouring surgery has the potential to improve or restore a patient's body image and health-related quality of life (HR-QOL). A new PRO instrument, called the BODY-Q, has recently been developed specifically for this patient group. The aim of the current study was to translate and perform a linguistic validation of the BODY-Q for use in Danish bariatric and body contouring patients...
2017: European Journal of Plastic Surgery
https://www.readbyqxmd.com/read/28105886/interobserver-delineation-uncertainty-in-involved-node-radiation-therapy-inrt-for-early-stage-hodgkin-lymphoma-on-behalf-of-the-radiotherapy-committee-of-the-eortc-lymphoma-group
#8
Marianne C Aznar, Theodore Girinsky, Anne Kiil Berthelsen, Berthe Aleman, Max Beijert, Martin Hutchings, Yolande Lievens, Paul Meijnders, Peter Meidahl Petersen, Deborah Schut, Maja V Maraldo, Richard van der Maazen, Lena Specht
BACKGROUND AND PURPOSE: In early-stage classical Hodgkin lymphoma (HL) the target volume nowadays consists of the volume of the originally involved nodes. Delineation of this volume on a post-chemotherapy CT-scan is challenging. We report on the interobserver variability in target volume definition and its impact on resulting treatment plans. MATERIALS AND METHODS: Two representative cases were selected (1: male, stage IB, localization: left axilla; 2: female, stage IIB, localizations: mediastinum and bilateral neck)...
April 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28089481/recommendations-for-mri-based-contouring-of-gross-tumor-volume-and-organs-at-risk-for-radiation-therapy-of-pancreatic-cancer
#9
H D Heerkens, W A Hall, X A Li, P Knechtges, E Dalah, E S Paulson, C A T van den Berg, G J Meijer, E J Koay, C H Crane, K Aitken, M van Vulpen, B A Erickson
PURPOSE: Local recurrence is a common and morbid event in patients with unresectable pancreatic adenocarcinoma. A more conformal and targeted radiation dose to the macroscopic tumor in nonmetastatic pancreatic cancer is likely to reduce acute toxicity and improve local control. Optimal soft tissue contrast is required to facilitate delineation of a target and creation of a planning target volume with margin reduction and motion management. Magnetic resonance imaging (MRI) offers considerable advantages in optimizing soft tissue delineation and is an ideal modality for imaging and delineating a gross tumor volume (GTV) within the pancreas, particularly as it relates to conformal radiation planning...
March 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28089480/deep-inspiration-breath-hold-produces-a-clinically-meaningful-reduction-in-ipsilateral-lung-dose-during-locoregional-radiation-therapy-for-some-women-with-right-sided-breast-cancer
#10
Jessica L Conway, Leigh Conroy, Lindsay Harper, Marie Scheifele, Haocheng Li, Wendy L Smith, Tannis Graham, Tien Phan, Ivo A Olivotto
PURPOSE: The goal of the work described here was to determine whether deep inspiration breath-hold (DIBH) produces a clinically meaningful reduction in pulmonary dose compared with free breathing (FB) during locoregional radiation for right-sided breast cancer. METHODS AND MATERIALS: Four-field, modified-wide tangent plans with full nodal coverage were developed for 30 consecutive patients on paired DIBH and FB CT scans. Nodes were contoured according to European Society for Radiotherapy and Oncology guidelines...
October 19, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28048814/su-f-j-123-ct-based-determination-of-dibh-variability-and-its-dosimetric-impact-on-post-mastectomy-plus-regional-nodal-radiation-therapy
#11
M Malin, H Kang, K Tatebe, Y Hasan, S Chmura, H Al-Hallaq
PURPOSE: Breast cancer radiotherapy delivered using voluntary deep inspiration breath-hold (DIBH) requires reproducible breath holds, particularly when matching supraclavicular fields to tangential fields. We studied the impact of variation in DIBHs on CTV and OAR dose metrics by comparing the dose distribution computed on two DIBH CT scans taken at the time of simulation. METHODS: Ten patients receiving 50Gy in 25 fractions to the left chestwall and regional lymph nodes were studied...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048396/su-f-t-455-is-contouring-the-whole-breast-necessary-for-two-field-3d-breast-planning
#12
A Desai, Eric Ku, D Fang, C Lawrence, C Iannuzzi, C Shi
PURPOSE: To investigate the effect of contouring the whole breast on reducing the radiation dose to the heart and affected lung in tangential field-in-field 3D breast planning. We hypothesize that contouring the whole breast will simplify the plan normalization process, reduce dose to critical structures, while maintaining treatment plan quality and consistency. METHODS: Twenty previously treated breast cancer patients using tangential field-in-field 3D planning technique were randomly selected...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047942/su-f-t-298-the-impact-of-modeling-the-treatment-couch-on-patient-specific-vmat-qa
#13
E Gelover, A Dalhart, D Hyer
PURPOSE: The aim of this work is to quantify the impact of modeling the treatment couch on the passing rate of ion chamber measurements during VMAT quality assurance. METHODS: For the initial characterization, attenuation and surface dose measurements were performed following the guidelines of TG-176 for the Civco Universal couch top using an Elekta VersaHD accelerator at an energy of 6 MV. A simulation CT was performed to aid in the creation of contours for representing the shape and size of the couch top in the treatment planning system (TPS)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047917/tu-h-campus-jep2-01-inter-observer-delineation-comparison-of-visible-glandular-breast-tissue-on-magnetic-resonance-imaging-and-computed-tomography-prone-and-supine
#14
E M Pogson, G Delaney, V Ahern, M Boxer, S David, M Dimigen, J Harvey, E Koh, K Lim, G Papadatos, M Yap, V Batumalai, P Metcalfe, L Holloway
PURPOSE: Breast cancers predominantly arise from Glandular Breast Tissue (GBT). If the GBT can be treated effectively post-operatively utilising radiotherapy this may be adequate volumetric coverage for adjuvant breast radiotherapy. Adequate imaging of the GBT is necessary and will be assessed between MRI and CT modalities. GBT visualisation is acknowledged to be qualitatively superior on Magnetic Resonance Image (MRI) compared to Computed Tomography (CT), the current radiotherapy imaging standard, however this has not been quantitatively assessed...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047846/su-f-t-534-using-daily-images-to-verify-dosimetric-advantage-of-dual-isocentric-technique-for-high-risk-prostate-cancer-treated-with-pelvic-lymph-node
#15
T Cui, Q Shang, W Li, A Vassil, P Xia
PURPOSE: To evaluate a dual-isocentric technique to compensate for the daily independent movements of prostate and pelvic lymph nodes (PLN) of high-risk prostate cancer patients. METHODS: Three patients, who received 78 Gy to the prostate, 66 Gy to the seminal vesicle (SV), and 50.4 Gy to the PLN in 39 fractions under CT-on-rail (CTOR) imaging guidance, were retrospectively selected. Each patient was planned with volumetric modulated arc therapy (VMAT) techniques using (1) single isocenter with a 6 mm margin except 4 mm posteriorly (6/4 mm), to the prostate-CTV and a uniform 5 mm margin to the PLN-CTV, and (2) two isocenters, located at the centroids of the prostate or the PLN, with a 5/3 mm margin to the prostate-CTV and a 5 mm uniform margin to the PLN-CTV...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047707/su-g-201-14-is-maximum-skin-dose-a-reliable-metric-for-accelerated-partial-breast-irradiation-with-brachytherapy
#16
S Park, O Ragab, S Patel, Y Kim, J Demanes, M Kamrava
PURPOSE: To evaluate the reliability of the maximum point dose (Dmax) to the skin surface as a dosimetric constraint, we investigated the correlation between Dmax at the skin surface and dose metrics at various definitions of skin thickness. METHODS: 42 patients treated with APBI using a Strut Adjusted Volume Implant (SAVI) applicator between 2010 and 2014 were retrospectively reviewed. Target (PTV_EVAL) and organs at risk (OARs: skin, lung, and ribs) were delineated on a CT following NSABP B-39 guidelines...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047106/su-g-iep2-03-comparison-of-dose-calculation-on-mar-metal-artifact-reduction-and-non-mar-datasets-for-pelvic-patients-with-hip-prosthesis-and-head-and-neck-patients-with-dental-filling
#17
V Huang, K Kohli
PURPOSE: Metal artifact reduction (MAR) software in computed tomography (CT) was previously evaluated with phantoms demonstrating the algorithm is capable of reducing metal artifacts without affecting the overall image quality. The goal of this study is to determine the dosimetric impact when calculating with CT datasets reconstructed with and without MAR software. METHODS: Twelve head and neck cancer patients with dental fillings and four pelvic cancer patients with hip prosthesis were scanned with a GE Optima RT 580 CT scanner...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046520/su-f-t-388-comparison-of-biophysical-indices-in-hippocampal-avoidance-whole-brain-vmat-and-imrt-radiation-therapy-treatment-plans
#18
E Kendall, S Ahmad, O Algan, C Higby, S Hossain
PURPOSE: To compare biophysical indices of Volumetric Modulated Arc Therapy (VMAT) and Intensity Modulated Radiation Therapy (IMRT) treatment plans for whole brain radiation therapy following the NRG-CC001 protocol. METHODS: In this retrospective study, a total of fifteen patients were planned with Varian Eclipse Treatment Planning System using VMAT (RapidArc) and IMRT techniques. The planning target volume (PTV) was defined as the whole brain volume excluding a uniform three-dimensional 5mm expansion of the hippocampus volume...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046429/su-f-t-418-evaluation-of-organs-at-risk-oar-sparing-in-left-breast-irradiation-techniques
#19
A Saini, C Hwang, I Das
PURPOSE: To compare dose to organs at risk (OAR) for left sided breast radiation therapy with comparable planning target volume (PTV) coverage in three techniques; free breathing in supine position (FB), deep inspirational breath hold in supine (DIBH) and free breathing in prone position (PP). METHODS: Ten left sided breast cancer patients suitable for this study underwent a CT scan in three techniques e.g. supine, FB and DIBH and prone position (PP). One radiation oncologist contoured the PTV and OAR (cardiac components) based on RTOG guidelines...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046352/su-f-t-539-dosimetric-comparison-of-volumetric-modulated-arc-therapy-and-intensity-modulated-radiation-therapy-for-whole-brain-hippocampal-sparing-radiation-therapy-treatments
#20
E Kendall, C Higby, O Algan, S Ahmad, S Hossain
PURPOSE: To compare the treatment plan quality and dose gradient near the hippocampus between VMAT (RapidArc) and IMRT delivery techniques for whole brain radiation therapy. METHODS: Fifteen patients were evaluated in this retrospective study. All treatments were planned on Varian Eclipse TPS, using 3-Arc VMAT and 9-Field IMRT, following NRG Oncology protocol NRG-CC001 guidelines evaluated by a single radiation oncologist. Prescribed doses in all plans were 30 Gy delivered over 10 fractions normalized to a minimum of 100% of the dose covering 95% of the target volume...
June 2016: Medical Physics
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