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https://www.readbyqxmd.com/read/28300372/lung-volume-reproducibility-under-abc-control-and-self-sustained-breath-holding
#1
Evangelia Kaza, Alex Dunlop, Rafal Panek, David J Collins, Matthew Orton, Richard Symonds-Tayler, Dualta McQuaid, Erica Scurr, Vibeke Hansen, Martin O Leach
An Active Breathing Coordinator (ABC) can be employed to induce breath-holds during CT imaging and radiotherapy of lung, breast and liver cancer, and recently during lung cancer MRI. The apparatus measures and controls respiratory volume, hence subject lung volume reproducibility is its principal measure of effectiveness. To assess ABC control quality, the intra-session reproducibility of ABC-induced lung volumes was evaluated and compared with that reached by applying the clinical standard of operator-guided self-sustained breath-holds on healthy volunteers during MRI...
March 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297275/how-dose-sparing-of-cardiac-structures-correlates-with-in-field-heart-volume-and-sternal-displacement
#2
Taeho Kim, Kelli Reardon, Daniel M Trifiletti, Constance Geesey, Kaitlyn Sukovich, Edwin Crandley, Paul W Read, Krishni Wijesooriya
Cardiac irradiation increases the risk of coronary artery disease in patients with left-sided breast cancer. Techniques exist to reduce cardiac irradiation, but the optimum technique depends on individual patient anatomy and physiology. We investigated the correlation of delta heart volume in field (dHVIF) and sternal excursion with dose sparing in heart and left anterior descending artery (LAD) to develop quantitative predictive models for expected dose to heart and LAD. A treatment planning study was performed on 97 left-breast cancer patients who underwent whole breast radiotherapy (prescription dose = 50 Gy) under deep inspiratory breath hold (DIBH)...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296326/evaluation-of-target-and-cardiac-position-during-visually-monitored-deep-inspiration-breath-hold-for-breast-radiotherapy
#3
Leigh Conroy, Rosanna Yeung, Elizabeth Watt, Sarah Quirk, Karen Long, Alana Hudson, Tien Phan, Wendy L Smith
A low-resource visually monitored deep inspiration breath-hold (VM-DIBH) technique was successfully implemented in our clinic to reduce cardiac dose in left-sided breast radiotherapy. In this study, we retrospectively characterized the chest wall and heart positioning accuracy of VM-DIBH using cine portal images from 42 patients. Central chest wall position from field edge and in-field maximum heart distance (MHD) were manually measured on cine images and compared to the planned positions based on the digitally reconstructed radiographs (DRRs)...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28291912/improving-the-efficiency-of-breast-radiotherapy-treatment-planning-using-a-semi-automated-approach
#4
Robert A Mitchell, Philip Wai, Ruth Colgan, Anna M Kirby, Ellen M Donovan
OBJECTIVES: To reduce treatment planning times while maintaining plan quality through the introduction of semi-automated planning techniques for breast radiotherapy. METHODS: Automatic critical structure delineation was examined using the Smart Probabilistic Image Contouring Engine (SPICE) commercial autosegmentation software (Philips Radiation Oncology Systems, Fitchburg, WI) for a cohort of ten patients. Semiautomated planning was investigated by employing scripting in the treatment planning system to automate segment creation for breast step-and-shoot planning and create objectives for segment weight optimization; considerations were made for three different multileaf collimator (MLC) configurations...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28243923/risks-and-benefits-of-reducing-target-volume-margins-in-breast-tangent-radiotherapy
#5
Deepak Basaula, Alexandra Quinn, Amy Walker, Vikneswary Batumalai, Shivani Kumar, Geoff P Delaney, Lois Holloway
This study investigates the potential benefits of planning target volume (PTV) margin reduction for whole breast radiotherapy in relation to dose received by organs at risk (OARs), as well as reductions in radiation-induced secondary cancer risk. Such benefits were compared to the increased radiation-induced secondary cancer risk attributed from increased ionizing radiation imaging doses. Ten retrospective patients' computed tomography datasets were considered. Three computerized treatment plans with varied PTV margins (0, 5 and 10 mm) were created for each patient complying with the Radiation Therapy Oncology Group (RTOG) 1005 protocol requirements...
February 27, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28236538/understanding-variations-in-the-use-of-hypofractionated-radiotherapy-and-its-specific-indications-for-breast-cancer-a-mixed-methods-study
#6
Joan Prades, Manel Algara, Josep A Espinàs, Blanca Farrús, Meritxell Arenas, Victoria Reyes, Virginia García-Reglero, Maria Josep Cambra, Esther Rubio, Lluis Anglada, Arantxa Eraso, Agustí Pedro, Maria J Fuentes-Raspall, Victòria Tuset, Judit Solà, Josep M Borras
BACKGROUND AND PURPOSE: Radiation oncology guidelines favour hypofractionated whole-breast radiotherapy (HWBRT) over more conventional schemes in the conservative treatment of breast cancer, but its adoption still varies in clinical practice. This study assessed the patterns of HWBRT adoption in Catalonia (Spain). MATERIAL AND METHODS: We used a mixed-methods approach based on an explanatory sequential design, first collecting and analysing quantitative data on HWBRT use (>2...
February 21, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28219911/triple-negative-breast-cancer-with-brain-metastasis-in-a-pregnant-woman
#7
Francisco Trinca, Mariana Inácio, Teresa Timóteo, Rui Dinis
A woman aged 35 years was diagnosed with triple-negative breast cancer in October 2012. During the investigation, it was discovered that she was pregnant, the patient decided to have an abortion. She was submitted to a radical modified mastectomy and adjuvant chemotherapy followed by adjuvant breast radiotherapy of the left breast. 2 months after the adjuvant treatment, she began to have headaches and dizziness. The cranial MRI (head MRI) showed brain metastasis. She was then treated with whole brain radiotherapy, stereotactic radiosurgery and concomitant temozolomide which resulted in complete response...
February 20, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28193310/depressive-symptoms-and-inflammation-are-independent-risk-factors-of-fatigue-in-breast-cancer-survivors
#8
C Xiao, A H Miller, J Felger, D Mister, T Liu, M A Torres
BACKGROUND: Psychosocial and inflammatory factors have been associated with fatigue in breast cancer survivors. Nevertheless, the relative contribution and/or interaction of these factors with cancer-related fatigue have not been well documented. METHOD: This cross-sectional study enrolled 111 stage 0-III breast cancer patients treated with breast surgery followed by whole breast radiotherapy. Fatigue was measured by the total score of the Multidimensional Fatigue Inventory-20...
February 14, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28179347/dose-sparing-potential-of-deep-inspiration-breath-hold-technique-for-left-breast-cancer-radiotherapy-organs-at-risk
#9
Gavin Lawler, Michelle Leech
BACKGROUND/AIM: To assess if deep inspiration breath-hold (DIBH) technique achieved dose sparing for organs-at-risk in left breast radiotherapy patients in order to reduce long-term complications. PATIENTS AND METHODS: DIBH and Free-breathing (FB) as a control, CT planning scans obtained for 28 left breast/chest wall (+/- supraclavicular field) patients treated January 2008-December 2013 were retrospectively re-contoured and re-planned. Organs-at-risk examined: lungs, left lung, heart and left anterior descending coronary artery (LADCA)...
2017: Anticancer Research
https://www.readbyqxmd.com/read/28160158/hypofractionated-whole-breast-radiotherapy-in-breast-conservation-for-early-stage-breast-cancer-a-systematic-review-and-meta-analysis-of-randomized-trials
#10
REVIEW
Luca F Valle, Surbhi Agarwal, Kathleen E Bickel, Haley A Herchek, David C Nalepinski, Nirav S Kapadia
PURPOSE: Breast conservation therapy (BCT) for early-stage breast cancer involves lumpectomy followed by whole breast radiotherapy, which can involve either standard fractionation (SRT) or accelerated fractionation (ART). This systematic review and meta-analysis was performed to determine whether any benefit exists for ART or SRT. MATERIALS AND METHODS: We searched MEDLINE (1966-2014), all seven databases of the Cochrane Library (1968-2014), EMBASE (1974-2014), clinicaltrials...
February 3, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28155607/targeted-intraoperative-radiotherapy-tumour-bed-boost-during-breast-conserving-surgery-after-neoadjuvant-chemotherapy-in-her2-positive-and-triple-negative-breast-cancer
#11
Hans-Christian Kolberg, Gyoergy Loevey, Leyla Akpolat-Basci, Miltiades Stephanou, Peter A Fasching, Michael Untch, Max Bulsara, Jayant S Vaidya, Cornelia Liedtke
INTRODUCTION: Targeted intraoperative radiotherapy (TARGIT - IORT) as a tumour bed boost after breast conserving surgery is well established for women with early breast cancer. A previous study from our group shows a beneficial effect of TARGIT-IORT on overall survival (OS) but not disease-free survival (DFS) after neoadjuvant chemotherapy compared to an external boost suggesting a potential non-inferiority of TARGIT-IORT. In this study we present results regarding the high-risk subset of patients (i...
February 1, 2017: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/28144592/calculation-of-thyroid-dose-with-planner-system-and-evaluation-of-thyroid-function-after-radiotherapy-for-patients-with-breast-cancer
#12
M Dorri Giv, M H Bahreini Toosi, S M R Aghamiri, F Akbari, S Taeb
BACKGROUND: Much research has widely been conducted into thyroid hormones levels following radiotherapy for breast cancer. Consequently, in this study, we evaluated to relate the rate of thyroid hormones levels with the dose distribution among breast cancer patients. MATERIAL AND METHODS: Thirty patients were treated with 4-field breast cancer radiotherapy. The dose volume histograms, the volume percentage of the thyroid absorbing respectively 20, 30, 40 and 50 Gy were then estimated (V20, V30, V40 and V50) together with the individual average thyroid dose over the whole gland derived from their computed tomography-based treatment plans...
December 2016: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/28144591/calculation-of-thyroid-dose-with-planner-system-and-evaluation-of-thyroid-function-after-radiotherapy-for-patients-with-breast-cancer
#13
M Dorri Giv, M H Bahreini Toosi, S M R Aghamiri, F Akbari, S Taeb
BACKGROUND: Much research has widely been conducted into thyroid hormones levels following radiotherapy for breast cancer. Consequently, in this study, we evaluated to relate the rate of thyroid hormones levels with the dose distribution among breast cancer patients. MATERIAL AND METHODS: Thirty patients were treated with 4-field breast cancer radiotherapy. The dose volume histograms, the volume percentage of the thyroid absorbing respectively 20, 30, 40 and 50 Gy were then estimated (V20, V30, V40 and V50) together with the individual average thyroid dose over the whole gland derived from their computed tomography-based treatment plans...
December 2016: Journal of Biomedical Physics & Engineering
https://www.readbyqxmd.com/read/28139381/assessment-of-upfront-selection-criteria-to-prioritise-patients-for-breath-hold-left-sided-breast-radiotherapy
#14
N Tanna, R McLauchlan, S Karis, C Welgemoed, D M Gujral, S J Cleator
AIMS: Deep inspiratory breath-hold (DIBH) techniques for left breast and chest wall radiotherapy can reduce cardiac dose. We investigated the use of 'upfront selection' criteria for DIBH based on tumour bed position and whether cardiac shielding was used. MATERIALS AND METHODS: Four methods of selecting patients for DIBH were assessed retrospectively in a cohort of left breast and chest wall treatments. These were: (1) free breathing scan on all patients, selecting DIBH treatment for those with a predicted mean heart dose ≥3 Gy; (2) selective DIBH for those with maximum heart depth (MHD) on free breathing scan ≥1 cm; (3) use of an 'upfront selection process' using tumour bed position as initial selection and measurement of MHD on those not selected upfront; (4) DIBH on all...
January 27, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28129971/dosimetric-aspects-of-breast-radiotherapy-with-three-dimensional-and-intensity-modulated-radiotherapy-helical-tomotherapy-planning-modules
#15
Poonam Yadav, Yue Yan, Tasha Ignatowski, Anna Olson
In this work, we investigated the dosimetric differences between the intensity-modulated radiotherapy (IMRT) plans and the three-dimensional (3D) helical plans based on the TomoTherapy system. A total of 15 patients with supine setup were randomly selected from the data base. For patients with lumpectomy planning target volume (PTV), regional lymph nodes were also included as part of the target. For dose sparing, the significant differences between the helical IMRT and helical 3D were only found in the heart and contralateral breast...
April 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28129897/quantifying-radiation-dose-delivered-to-individual-shoulder-muscles-during-breast-radiotherapy
#16
David B Lipps, Sean Sachdev, Jonathan B Strauss
BACKGROUND AND PURPOSE: Radiotherapy is an effective treatment for managing breast cancer, but patients may experience shoulder morbidity after completing radiotherapy. There is a knowledge gap regarding how the inclusion of the regional lymphatics in radiation treatment regimens influence the radiation dose delivered to the underlying shoulder musculature. MATERIAL AND METHODS: Five standardized radiation treatment regimens were developed from the computed tomography (CT) scans of 11 patients: tangent fields only (T), high tangent fields (HT), T+supraclavicular fossa and axillary apex with an anterior oblique beam (SCV), T+SCV+axillary nodes with an anterior oblique beam (SCV+AX), and T+SCV+AX with the nodal regions treated with a directly opposed beam configuration (DO)...
January 24, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28122895/21-gene-recurrence-score-and-locoregional-recurrence-in-node-positive-er-positive-breast-cancer-treated-with-chemo-endocrine-therapy
#17
Eleftherios P Mamounas, Qing Liu, Soonmyung Paik, Frederick L Baehner, Gong Tang, Jong-Hyeon Jeong, S Rim Kim, Steven M Butler, Farid Jamshidian, Diana B Cherbavaz, Amy P Sing, Steven Shak, Thomas B Julian, Barry C Lembersky, D Lawrence Wickerham, Joseph P Costantino, Norman Wolmark
BACKGROUND: The 21-gene recurrence score (RS) predicts risk of locoregional recurrence (LRR) in node-negative, estrogen receptor (ER)-positive breast cancer. We evaluated the association between RS and LRR in node-positive, ER-positive patients treated with adjuvant chemotherapy plus tamoxifen in National Surgical Adjuvant Breast and Bowel Project B-28. METHODS: B-28 compared doxorubicin/cyclophosphamide (AC X 4) with AC X 4 followed by paclitaxel X 4. Tamoxifen was given to patients age 50 years or older and those younger than age 50 years with ER-positive and/or progesterone receptor-positive tumors...
January 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/28117520/is-sentinel-node-biopsy-of-the-internal-mammary-lymph-nodes-relevant-in-the-management-of-breast-cancer
#18
Chuan Tan, Rebecca Caragata, Ian Bennett
The aim of this study was to review the outcomes of a series of breast cancer patients who underwent sentinel node biopsy inclusive of lymphoscintigraphy, and to assess the incidence of internal mammary node (IMN) metastatic positivity at exploration and whether these findings influenced treatment. Between April 2001 and December 2012, 581 breast cancer patients at Princess Alexandra Hospital underwent preoperative lymphoscintigraphy in the course of the performance of sentinel node biopsy. Analysis was performed of those patients who demonstrated radio-isotope uptake to the IMN chain, and who had sentinel node biopsy of the IMN's and were found to have metastatic involvement...
January 24, 2017: Breast Journal
https://www.readbyqxmd.com/read/28100239/elective-breast-radiotherapy-including-level-i-and-ii-lymph-nodes-a-planning-study-with-the-humeral-head-as-planning-risk-volume
#19
Kathrin Surmann, Jorien van der Leer, Tammy Branje, Maurice van der Sangen, Maarten van Lieshout, Coen W Hurkmans
BACKGROUND: The aim of this study was to assess the dose to the humeral head planning risk volume with the currently used high tangential fields (HTF) and compare different planning techniques for breast radiotherapy including axillary level I and II lymph nodes (PTVn) while sparing the humeral head. METHODS: Ten patients with left-sided breast cancer were enrolled in a planning study with 16 fractions of 2.66 Gy. Four planning techniques were compared: HTF, HTF with sparing of the humeral head, 6-field IMRT with sparing of the humeral head and VMAT with sparing of the humeral head...
January 18, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28087071/development-of-delineation-for-the-left-anterior-descending-coronary-artery-region-in-left-breast-cancer-radiotherapy-an-optimized-organ-at-risk
#20
Jie Lee, Kai-Lung Hua, Shih-Ming Hsu, Jhen-Bin Lin, Chou-Hsien Lee, Kuo-Wei Lu, Kun-Yao Dai, Xu-Nian Huang, Jun-Zhao Huang, Meng-Hao Wu, Yu-Jen Chen
BACKGROUND AND PURPOSE: The left anterior descending coronary artery (LAD) and diagonal branches (DBs) are blurred on computed tomography (CT). We aimed to define the LAD region (LADR) with adequate inclusion of the LAD and DBs and contouring consistency. METHODS AND MATERIALS: The LADR was defined using coronary CT angiograms. The inclusion ratio was used to assess the LAD and DBs inclusion by the LADR. Four radiation oncologists delineated the LAD and LADR, using contrast-enhanced CT of 15 patients undergoing left breast radiotherapy...
January 10, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
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