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Radiotherapy radiation

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https://www.readbyqxmd.com/read/28091898/the-outcomes-of-radiotherapy-and-factors-that-predict-overall-survival-in-elderly-patients-with-esophageal-squamous-cell-carcinoma
#1
H Yin, M E, H Zhang, C Wang
PURPOSE: The aim of this study was to evaluate radiotherapy in terms of both feasibility and efficacy for the treatment of 206 elderly patients (≥70 years) with unresectable ESCC and to investigate the factors that predict overall survival in those patients. METHODS: Totally, 206 elderly patients with esophageal cancer (≥70 years) treated with RT for ESCC in the Harbin Medical University Affiliated Tumor Hospital were retrospectively enrolled. Radiation treatment results and side effects were evaluated...
January 13, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28089762/long-terms-results-of-a-trial-of-concurrent-chemotherapy-and-escalating-doses-of-radiation-for-unresectable-non-small-cell-lung-cancer-ncctg-n0028-alliance
#2
Steven E Schild, Shauna L Hillman, Angelina D Tan, Helen J Ross, William L McGinnis, Yolanda A Garces, David L Graham, Alex A Adjei, James R Jett
INTRODUCTION OR HYPOTHESIS: This phase I/II trial was originally designed to determine the maximally tolerated dose(MTD) of thoracic radiotherapy(TRT) as part of a combined modality approach. This report includes the long-term outcome of patients treated on this study. The phase II portion was never completed as RTOG-0617 opened before it was concluded. METHODS: The MTD was defined as 74Gy in 37 fractions in this study. Twenty-five patients with unresectable non-small cell lung cancer(NSCLC) were treated with 2Gy daily fractions and concurrent weekly carboplatin and paclitaxel...
January 12, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28089528/hydrogel-spacer-distribution-within-the-perirectal-space-in-patients-undergoing-radiotherapy-for-prostate-cancer-impact-of-spacer-symmetry-on-rectal-dose-reduction-and-the-clinical-consequences-of-hydrogel-infiltration-into-the-rectal-wall
#3
Benjamin W Fischer-Valuck, Anupama Chundury, Hiram Gay, Walter Bosch, Jeff Michalski
PURPOSE: Hydrogel prostate-rectum spacers, biomaterials placed between the prostate and rectum, continue to gain interest as a method to reduce or limit rectal dose during dose escalated prostate cancer radiation therapy. Because the spacer is initially injected into the perirectal space as a liquid, the final distribution can vary. The purpose of this study was to evaluate hydrogel spacer (SpaceOAR system) implantation and distribution from a recent prospective randomized control trial and correlate spacer symmetry with rectal dose reduction as well as rectal wall infiltration (RWI) to acute and late toxicity...
October 17, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28089527/mri-in-radiotherapy-for-lung-cancer-a-free-breathing-protocol-at-3t
#4
Shivani Kumar, Robba Rai, Daniel Moses, Callie Choong, Lois Holloway, Shalini Kavita Vinod, Gary Liney
Imaging plays a significant role in radiation therapy. Improvements in treatment delivery require sophisticated imaging technologies to define tumor volume accurately. Magnetic resonance imaging scans can provide morphological and functional information and are increasingly being used in imaging for radiation therapy; however, for lung cancer, most protocols are based on breath-hold imaging and noncompliance to breath-hold maneuver can lead to significant artifacts. For patients presenting for lung cancer radiation therapy, maintaining a breath hold can be impossible...
October 19, 2016: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28089483/patterns-of-failure-after-radiotherapy-for-pediatric-patients-with-intracranial-ependymoma
#5
Fatima Tensaouti, Anne Ducassou, Léonor Chaltiel, Stéphanie Bolle, Xavier Muracciole, Bernard Coche-Dequeant, Claire Alapetite, Valérie Bernier, Line Claude, Stéphane Supiot, Aymeri Huchet, Christine Kerr, Elisabeth le Prisé, Anne Laprie
PURPOSE: To investigate the patterns of failure after radiotherapy for pediatric intracranial ependymoma and their correlation with dose parameters. METHODS: Between 2000 and 2013, 206 patients were treated in France. MRI scans at relapse were registered to the original planning CTs for topographic analysis of failure patterns. To compare relapse patients (RP) with non relapse patients (NRP), several dose parameters were derived from dose volume histograms. RESULTS: Over a median follow-up of 53...
January 12, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28089482/efficacy-of-multiple-fraction-conventional-radiation-therapy-for-painful-uncomplicated-bone-metastases-a-systematic-review
#6
REVIEW
Ronald Chow, Peter Hoskin, Stephanie Chan, Aruz Mesci, Drew Hollenberg, Henry Lam, Carlo DeAngelis, Edward Chow
BACKGROUND: Radiation therapy is effective for painful uncomplicated bone metastases, with multiple fraction radiation therapy (MFRT) administered frequently. The optimal dose for MFRT to yield maximum pain relief remains unclear. The aim of this systematic review was to determine pain response across MFRT doses. METHODS: A literature search was conducted in Ovid MEDLINE(R) <1946 to July Week 3 2016>, Embase Classic & Embase <1947 to 2016Week 30> and Cochrane Central Register of Controlled Trials <June 2016>...
January 12, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and 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
#7
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/28089106/-edge-on-moskin-detector-for-stereotactic-beam-measurement-and-verification
#8
Wei Loong Jong, Ngie Min Ung, Ath Vannyat, Zulaikha Jamalludin, Anatoly Rosenfeld, Jeannie Hsiu Ding Wong
Dosimetry in small radiation field is challenging and complicated because of dose volume averaging and beam perturbations in a detector. We evaluated the suitability of the "Edge-on" MOSkin (MOSFET) detector in small radiation field measurement. We also tested the feasibility for dosimetric verification in stereotactic radiosurgery (SRS) and stereotactic radiotherapy (SRT). "Edge-on" MOSkin detector was calibrated and the reproducibility and linearity were determined. Lateral dose profiles and output factors were measured using the "Edge-on" MOSkin detector, ionization chamber, SRS diode and EBT2 film...
January 6, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28088075/development-of-a-hypoxia-triggered-and-hypoxic-radiosensitized-liposome-as-a-doxorubicin-carrier-to-promote-synergetic-chemo-radio-therapy-for-glioma
#9
Hongmei Liu, Yandong Xie, Yafei Zhang, Yifan Cai, Baiyang Li, Honglin Mao, Yingguo Liu, Jun Lu, Longzhen Zhang, Rutong Yu
The treatment of malignant primary brain tumors is challenging. Concomitant radiochemotherapy has become the standard clinical treatment for malignant glioma, but there are two critical challenges to overcome in order to increase efficacy. First, glioma is known to have increased resistant to radiation due to its intra-tumoral hypoxia. In addition, the blood-brain barrier (BBB) restricts the distribution of the chemotherapeutic agent to the brain. Therefore, we developed a hypoxic radiosensitizer-prodrug liposome (MLP), in order to deliver DOX to the tumor and to overcome the above challenges, achieving a synergistic chemo-/radiotherapy treatment of malignant glioma...
January 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28087132/practice-patterns-of-thoracic-radiotherapy-for-extensive-stage-small-cell-lung-cancer-survey-of-us-academic-thoracic-radiation-oncologists
#10
Carl M Post, Vivek Verma, Timur Mitin, Charles B Simone
PURPOSE: Despite the recent CREST trial demonstrating a survival benefit to thoracic radiotherapy (TRT) for patients with extensive-stage small-cell lung cancer (ES-SCLC) with response to chemotherapy, as well as endorsement by current National Comprehensive Cancer Network guidelines, TRT may not be uniformly delivered in clinical practice across all circumstances. METHODS AND MATERIALS: We surveyed US academic thoracic radiation oncologists regarding their practice patterns for TRT and assessed conditions in which withholding TRT could be warranted...
December 22, 2016: Clinical Lung Cancer
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
#11
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
https://www.readbyqxmd.com/read/28086959/e-learning-programs-in-oncology-a-nationwide-experience-from-2005-to-2014
#12
Jan Degerfält, Staffan Sjöstedt, Per Fransson, Elisabeth Kjellén, Mads U Werner
BACKGROUND: E-learning is an established concept in oncological education and training. However, there seems to be a scarcity of long-term assessments of E-learning programs in oncology vis-á-vis their structural management and didactic value. This study presents descriptive, nationwide data from 2005 to 2014. E-learning oncology programs in chemotherapy, general oncology, pain management, palliative care, psycho-social-oncology, and radiotherapy, were reviewed from our databases. Questionnaires of self-perceived didactic value of the programs were examined 2008-2014...
January 13, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28086942/external-beam-radiotherapy-for-unresectable-hepatocellular-carcinoma-an-international-multicenter-phase-i-trial-sakk-77-07-and-sasl-26
#13
Evelyn Herrmann, Diana Naehrig, Manfred Sassowsky, Martin Bigler, Jeroen Buijsen, Ilja Ciernik, Daniel Zwahlen, Alessandra Franzetti Pellanda, Andreas Meister, Peter Brauchli, Simona Berardi, Erika Kuettel, Jean-François Dufour, Daniel M Aebersold
PURPOSE: To assess feasibility and safety of conventionally fractionated radiotherapy (cfRT) in patients with hepatocellular carcinoma (HCC). METHODS: Patients with histologically confirmed stage cT1-4, cN0-1 HCC and Child-Pugh Score (CPS) A or B disease were included in a phase I multicenter trial. Metastatic HCC were allowed if ≥90% of total tumor volume was located within the liver. Patients were enrolled onto five dose-escalation levels (54-70Gy in 2Gy fractions) based on a modified 3 + 3 design, with cohorts of five patients instead of three patients in dose levels 4 and 5...
January 13, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28086825/toxicity-and-quality-of-life-report-of-a-phase-ii-study-of-stereotactic-body-radiotherapy-sbrt-for-low-and-intermediate-risk-prostate-cancer
#14
Matthew J Boyer, Michael A Papagikos, Rex Kiteley, Zeljko Vujaskovic, Jackie Wu, W Robert Lee
BACKGROUND: Clinical data indicates that delivery of larger daily doses of radiation may improve the therapeutic ratio for prostate cancer compared to conventional fractionation. A phase II study of stereotactic body radiotherapy with real-time motion management and daily plan re-optimization for low to intermediate risk prostate cancer was undertaken to evaluate this hypothesis. This report details the toxicity and quality of life following treatment. METHODS: From 2009 to 2013, 60 patients with T1-T2c prostate cancer with a Gleason score of 6 and PSA ≤ 15 or Gleason score of 7 and PSA ≤ 10 were enrolled...
January 13, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28081010/biological-dose-representation-for-carbon-ion-radiotherapy-of-unconventional-fractionation
#15
Nobuyuki Kanematsu, Taku Inaniwa
In carbon-ion radiotherapy, single-beam delivery each day in alternate directions has been common practice for efficient operation, taking advantage of the Bragg peak and the relative biological effectiveness (RBE) for uniform dose conformation to a tumor. Treatments are usually fractionated and treatment plans are evaluated with the total RBE-weighted dose; however, this is of limited relevance to the biological effect. In this study, we reformulate the biologically effective dose (BED) to normalize the dose-fractionation and cell-repopulation effects as well as the RBE of treating radiation, based on inactivation of a reference cell line by a reference carbon-ion radiation...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28081000/on-the-development-of-a-vipar-nd-radiotherapy-3d-polymer-gel-dosimeter
#16
Marek Kozicki, Malwina Jaszczak, Piotr Maras, Mariusz Dudek, Marian Cłapa
This work presents an improvement of the VIPAR(nd) ('nd' stands for 'normoxic, double', or VIP) polymer gel dosimeter. The gel composition was altered by increasing the concentration of the monomeric components, N-vinylpyrrolidone (NVP) and N,N'-methylenebisacrylamide (MBA), in co-solvent solutions. The optimal composition (VIPAR(CT), where 'CT' stands for computed tomography, or VIC) comprised: 17% NVP, 8% MBA, 12% t-BuOH, 7.5% gelatine, 0.007% ascorbic acid, 0.0008% CuSO4  ×  5H2O and 0.02% hydroquinone...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28079816/a-comparison-study-between-gross-tumor-volumes-defined-by-preoperative-magnetic-resonance-imaging-postoperative-specimens-and-tumor-bed-for-radiotherapy-after-breast-conserving-surgery
#17
Aiping Zhang, Jianbin Li, Wei Wang, Yongsheng Wang, Dianbin Mu, Zhaoqiu Chen, Qian Shao, Fengxiang Li
BACKGROUND: The identification and contouring of target volume is important for breast-conserving therapy. The aim of the study was to compare preoperative magnetic resonance imaging (MRI), postoperative pathology, excised specimens' (ES) size, and tumor bed (TB) delineation as methods for determining the gross tumor volume (GTV) for radiotherapy after breast-conserving surgery (BCS). METHODS: Thirty-three patients with breast cancer who underwent preoperative MRI and radiotherapy after BCS were enrolled...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28078727/second-cancer-incidence-in-primary-mediastinal-b-cell-lymphoma-treated-with-methotrexate-with-leucovorin-rescue-doxorubicin-cyclophosphamide-vincristine-prednisone-and-bleomycin-regimen-with-or-without-rituximab-and-mediastinal-radiotherapy-results-from-a-monoinstitutional
#18
Vitaliana De Sanctis, Marco Alfò, Alice Di Rocco, Michela Ansuinelli, Eleonora Russo, Mattia F Osti, Maurizio Valeriani, Giuseppe Minniti, Lavinia Grapulin, Daniela Musio, Stefano Bracci, Alessandra Spagnoli, Maria Luisa Moleti, Vincenzo Tombolini, Maurizio Martelli
Our aim is to assess the incidence of second cancer in long-time surviving primary mediastinal B-cell lymphoma (PMBCL) patients treated with combined radiochemoimmunotherapy (standard methotrexate with leucovorin rescue, doxorubicin, cyclophosphamide, vincristine, prednisone, and bleomycin with rituximab and mediastinal radiation therapy at a dose of 30 to 36 Gy). For this purpose, 92 points were evaluated. After a median overall survival of 137 months (range 76-212), we recorded second cancer in 3 of 80 long-surviving patients (3...
January 12, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28078405/-radiosurgery-and-fractionated-stereotactic-radiotherapy-of-vestibular-schwannoma
#19
K Hamm, H-U Herold, G Surber, S Rosahl
Management of vestibular schwannoma (VS) should always be interdisciplinary and results better than the natural course. Particularly in small VS, either microsurgical resection or radiosurgery (RS) can be employed. RS is a special method (initially only possible stereotactically) for delivering high-precision radiation from many directions to the target point (the isocenter) in a single high dose. With the development of three different systems-Gamma Knife (Elekta, Stockholm, Sweden), special linear accelerators, and CyberKnife (Accuray, Sunnyvale, CA, USA)-the options were extended to 1-5 fractions for RS and multisession RS (msRS), and to up to 6 weeks of conventional fractionation as stereotactic radiotherapy (SRT)...
January 11, 2017: HNO
https://www.readbyqxmd.com/read/28078113/results-of-intraoperative-electron-beam-radiotherapy-containing-multimodality-treatment-for-locally-unresectable-t4-rectal-cancer-a-pooled-analysis-of-the-mayo-clinic-rochester-and-catharina-hospital-eindhoven
#20
Fabian A Holman, Michael G Haddock, Leonard L Gunderson, Miranda Kusters, Grard A P Nieuwenhuijzen, Hetty A van den Berg, Heidi Nelson, Harm J T Rutten
BACKGROUND: The aim of this study is to analyse the pooled results of intraoperative electron beam radiotherapy (IOERT) containing multimodality treatment of locally advanced T4 rectal cancer, initially unresectable for cure, from the Mayo Clinic, Rochester, USA (MCR) and Catharina Hospital, Eindhoven, The Netherlands (CHE), both major referral centers for locally advanced rectal cancer. A rectal tumor is called locally unresectable for cure if after full clinical work-up infiltration into the surrounding structures or organs has been demonstrated, which would result in positive surgical margins if resection was the initial component of treatment...
December 2016: Journal of Gastrointestinal Oncology
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