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https://www.readbyqxmd.com/read/29166133/dosimetric-impact-of-gastrointestinal-air-column-in-radiation-treatment-of-pancreatic-cancer
#1
Neil C Estabrook, Jonathan B Corn, Marvene E Ewing, Higinia R Cardenes, Indra J Das
OBJECTIVE: Dosimetric evaluation of air column in gastro-intestinal (GI) structures in IMRT of pancreatic cancer. METHODS: Nine sequential patients were retrospectively chosen for dosimetric analysis of air column in the GI apparatus in pancreatic cancer using cone beam CT (CBCT). The 4DCT was used for target and organs at risk (OARs) and non-coplanar IMRT was used for treatment. Once/week, these patients underwent CBCT for air filling, isocenter verification and dose calculations retrospectively...
November 22, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29114609/dose-escalation-with-an-imrt-technique-in-15-to-28-fractions-is-better-tolerated-than-standard-doses-of-3dcrt-for-lapc
#2
Lauren E Colbert, Shalini Moningi, Awalpreet Chadha, Ahmed Amer, Yeonju Lee, Robert A Wolff, Gauri Varadhachary, Jason Fleming, Matthew Katz, Prajnan Das, Sunil Krishnan, Eugene J Koay, Peter Park, Christopher H Crane, Cullen M Taniguchi
Purpose: To review acute and late toxicities after chemoradiation for locally advanced pancreatic ductal adenocarcinoma in patients who were treated with escalated dose radiation (EDR). Methods and materials: Maximum Common Terminology Criteria for Adverse Events Version 4.0 acute toxicities (AT) during radiation and within 60 days after radiation were recorded for both acute gastrointestinal toxicity and overall toxicity (OT). Late toxicities were also recorded...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29110673/clinical-outcomes-of-graves-ophthalmopathy-treated-with-intensity-modulated-radiation-therapy
#3
Yong-Jiang Li, Yong Luo, Wei-Min He, Ping Li, Feng Wang
BACKGROUND: Radiation for Graves' ophthalmopathy (GO) has traditionally utilized lateral opposing fields (LOF) or three-dimensional conformal radiotherapy (3DCRT) technique. The current study was conducted to report clinical outcomes and therapeutic effects of intensity modulated radiation therapy (IMRT) in treating GO patients. METHODS: One hundred sixteen patients with GO were treated with IMRT as initial local therapy between July 2010 and August 2013, with a median follow-up of 62 months (range 45-81 months)...
November 6, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29108367/comparison-on-efficacy-of-radical-prostatectomy-versus-external-beam-radiotherapy-for-the-treatment-of-localized-prostate-cancer
#4
Linyan Chen, Qingfang Li, Yexiao Wang, Yiwen Zhang, Xuelei Ma
Since there was no consensus on treatment options of localized prostate cancer, a meta-analysis was performed to compare the efficacy of radical prostatectomy (RP) versus external beam radiotherapy (EBRT) concluding three-dimensional conformal radiotherapy (3DCRT) and intensity-modulated radiation therapy (IMRT). The search of eligible studies was performed on PubMed and Embase databases. The overall survival (OS), cancer-specific survival (CSS) and biochemical disease-free survival (BDFS) were compared by hazard ratio (HR) and odd ratios (OR)...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29101643/dosimetric-comparison-of-3-dimensional-conformal-radiotherapy-volumetric-modulated-arc-therapy-and-helical-tomotherapy-for-postoperative-gastric-cancer-patients
#5
Cem Onal, Yemliha Dölek, Berna Akkuş Yıldırım
PURPOSE: To compare dosimetric data for the planning target volume (PTV) and organs at risk (OARs) between 3-dimensional conformal radiotherapy (3DCRT), volumetric modulated arc therapy (VMAT), and helical tomotherapy [1]. MATERIALS AND METHODS: The dosimetric data for 15 gastric cancer patients treated with 3DCRT, VMAT, or HT techniques were used. Cumulative dosimetric parameters, homogeneity index (HI), and conformal index (CI) were compared for the PTV and OARs...
November 3, 2017: Japanese Journal of Radiology
https://www.readbyqxmd.com/read/29097074/a-phase-ii-toxicity-end-point-trial-icorg-99-09-of-accelerated-dose-escalated-hypofractionated-radiation-in-non-small-cell-lung-cancer
#6
D N Cagney, P G Thirion, M T Dunne, C Fleming, D Fitzpatrick, C M O'Shea, M A Finn, S O'Sullivan, C Booth, C D Collins, S J Buckney, A Shannon, J G Armstrong
AIMS: The objective of this phase II clinical trial was to prospectively evaluate the safety and efficacy of accelerated hypofractionated three-dimensional conformal radiation therapy (3DCRT) in localised non-resectable/non-operable non-small cell lung cancer (NSCLC). MATERIALS AND METHODS: Sixty patients with stage I-III NSCLC were enrolled in a prospective single-arm All Ireland Co-operative Oncology Research Group (ICORG 99-09) toxicity end point phase II trial...
October 30, 2017: Clinical Oncology: a Journal of the Royal College of Radiologists
https://www.readbyqxmd.com/read/28988893/radiation-therapy-of-synchronous-bilateral-breast-carcinoma-sbbc-using-multiple-techniques
#7
Sung Jin Kim, Mi Jo Lee, Seon Min Youn
The purpose of this study was to establish intensity-modulated radiation therapy (IMRT) and volumetric-modulated arc therapy (VMAT) treatment plans for synchronous bilateral breast cancer (SBBC) and to compare those plans with the previous treatment plans using 3D conformal radiation therapy (3DCRT). The differences among the treatments were also statistically compared regarding dosimetry distribution and treatment efficiency. The research was conducted with 10 SBBC patients. The study established IMRT (12 fields with a single isocenter) and VMAT (2 partial arcs with a single isocenter) treatment plans for SBBC patients and then compared those plans with 3DCRT (8 fields with multiple isocenters)...
October 5, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28984841/can-intensity-modulated-radiotherapy-reduce-toxicity-in-head-and-neck-squamous-cell-carcinoma
#8
REVIEW
Julie van der Veen, Sandra Nuyts
Intensity modulated radiotherapy (IMRT) is a modern radiotherapy technique that was implemented in the mid-1990s. It allows closer shaping of dose, to target volumes, thereby sparing organs at risk (OARs). Before the IMRT-era, two-dimensional radiotherapy (2DRT) and later three-dimensional conformal radiotherapy (3DCRT) were the techniques of choice, but this robust way of irradiating caused more normal tissue to receive a higher dose. Radiation of cancers in the head and neck region is complex because of close proximity to critical normal tissue and the large target volumes that need to be treated at high doses...
October 6, 2017: Cancers
https://www.readbyqxmd.com/read/28984517/intermediate-risk-meningioma-initial-outcomes-from-nrg-oncology-rtog-0539
#9
Leland Rogers, Peixin Zhang, Michael A Vogelbaum, Arie Perry, Lynn S Ashby, Jignesh M Modi, Anthony M Alleman, James Galvin, David Brachman, Joseph M Jenrette, John De Groot, Joseph A Bovi, Maria Werner-Wasik, Jonathan P S Knisely, Minesh P Mehta
OBJECTIVE This is the first clinical outcomes report of NRG Oncology RTOG 0539, detailing the primary endpoint, 3-year progression-free survival (PFS), compared with a predefined historical control for intermediate-risk meningioma, and secondarily evaluating overall survival (OS), local failure, and prospectively scored adverse events (AEs). METHODS NRG Oncology RTOG 0539 was a Phase II clinical trial allocating meningioma patients to 1 of 3 prognostic groups and management strategies according to WHO grade, recurrence status, and resection extent...
October 6, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28979889/comparative-analysis-of-efficacy-toxicity-and-patient-reported-outcomes-in-rectal-cancer-patients-undergoing-preoperative-3d-conformal-radiotherapy-or-vmat
#10
Antonia Regnier, Jana Ulbrich, Stefan Münch, Markus Oechsner, Dirk Wilhelm, Stephanie E Combs, Daniel Habermehl
BACKGROUND: Locally advanced rectal cancer (LARC) patients are usually treated within a multimodal therapy regime, in which the tumor resection plays the major role. This treatment ideally includes 5-fluorouracile (5FU)-based chemoradiation (CRT) leading to significantly improved local control rates. Local therapy as radiotherapy (RT) is required to be adapted referring to side effects and efficacy. Purpose of this study is the comparison of dosimetric parameters, acute and late toxicity, and quality of life in terms of patient-reported outcome (PRO) in patients treated with VMAT or 3D conformal radiotherapy (3DCRT) for LARC...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28974856/cardiac-dose-reduction-with-deep-inspiratory-breath-hold-technique-of-radiotherapy-for-left-sided-breast-cancer
#11
Lalitha Kameshwari Sripathi, Parveen Ahlawat, David K Simson, Chira Ranjan Khadanga, Lakshmipathi Kamarsu, Shital Kumar Surana, Kavi Arasu, Harpreet Singh
INTRODUCTION: Different techniques of radiation therapy have been studied to reduce the cardiac dose in left breast cancer. AIM: In this prospective dosimetric study, the doses to heart as well as other organs at risk (OAR) were compared between free-breathing (FB) and deep inspiratory breath hold (DIBH) techniques in intensity modulated radiotherapy (IMRT) and opposed-tangent three-dimensional radiotherapy (3DCRT) plans. MATERIALS AND METHODS: Fifteen patients with left-sided breast cancer underwent computed tomography simulation and images were obtained in both FB and DIBH...
July 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28947989/intensity-modulated-radiotherapy-has-superior-outcomes-to-three-dimensional-conformal-radiotherapy-in-patients-with-stage-ie-iie-extranodal-nasal-type-natural-killer-t-cell-lymphoma
#12
Yi-Yang Li, Hai-Qun Lin, Lu-Lu Zhang, Ling-Ling Feng, Shao-Qing Niu, Han-Yu Wang, Yu-Jing Zhang, Xi-Cheng Wang
We compared the treatment outcomes, toxicities and prognoses of patients with stage IE-IIE extranodal natural killer/T-cell lymphoma (ENKTL) treated with intensity-modulated radiotherapy (IMRT) or three-dimensional conformal radiotherapy (3DCRT). Newly diagnosed early-stage ENKTL patients (N = 173) were enrolled and received extended involved-field radiotherapy following induction chemotherapy. Patients were treated with 3DCRT (n = 98) or IMRT (n = 75). One-to-one matching of the IMRT and 3DCRT groups was performed through propensity score matching, which yielded 23 pairs of patients...
September 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938697/intensity-modulated-radiotherapy-for-hepatocellular-carcinoma-dosimetric-and-clinical-results
#13
REVIEW
Sun Hyun Bae, Won Il Jang, Hee Chul Park
Since the introduction of 3-dimensional conformal radiotherapy (3DCRT), new radiotherapy techniques have expanded the indication of radiotherapy for the treatment of hepatocellular carcinoma (HCC), from the hitherto palliative to a now curative-intent purpose. Intensity-modulated radiotherapy (IMRT), currently the most advanced radiotherapy technique, is considered an attractive option for the treatment of HCC, and is more widely applied because it can deliver a higher dose to the tumor than 3DCRT while sparing surrounding normal organs...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28924967/postoperative-radiotherapy-for-prostate-cancer-the-sooner-the-better-and-potential-to-reduce-toxicity-even-further
#14
Paolo Borghetti, Luigi Spiazzi, Claudia Cozzaglio, Sara Pedretti, Bruno Caraffini, Luca Triggiani, Diana Greco, Lilia Bardoscia, Fernando Barbera, Michela Buglione, Stefano Maria Magrini
PURPOSE: To evaluate biochemical relapse-free survival (bRFS), overall survival (OS), late rectal and bladder toxicities in a retrospective single institution series, also applying an in-house software for biological dose calculation. METHODS: 258 patients submitted to radiotherapy after prostatectomy were considered. Differences between groups were calculated using the log-rank test and the relevant clinical and therapeutic variables were considered for multivariate analysis...
September 18, 2017: La Radiologia Medica
https://www.readbyqxmd.com/read/28893059/dosimetric-advantages-and-clinical-outcomes-of-simultaneous-integrated-boost-intensity-modulated-radiotherapy-for-anal-squamous-cell-carcinoma
#15
Katsuyuki Sakanaka, Satoshi Itasaka, Yuichi Ishida, Kota Fujii, Takahiro Horimatsu, Takashi Mizowaki, Yoshiharu Sakai, Masahiro Hiraoka
Purpose: The purpose of this study was to explore the dosimetric difference between simultaneous integrated boost intensity-modulated radiotherapy (SIB-IMRT) and three-dimensional conformal radiotherapy (3DCRT), and the clinical outcomes of anal squamous cell carcinoma (ASCC) chemoradiotherapy featuring SIB-IMRT. Materials and Methods: This study included ten patients with ASCC who underwent chemoradiotherapy using SIB-IMRT with 5-fluorouracil and mitomycin C. SIB-IMRT delivered 54 Gy to each primary tumor plus metastatic lymph nodes and 45 Gy to regional lymph nodes, in 30 fractions...
September 15, 2017: Radiation Oncology Journal
https://www.readbyqxmd.com/read/28810885/intensity-modulated-versus-3-dimensional-conformal-radiotherapy-in-the-definitive-treatment-of-esophageal-cancer-comparison-of-outcomes-and-acute-toxicity
#16
Matthias Felix Haefner, Kristin Lang, Vivek Verma, Stefan Alexander Koerber, Lorenz Uhlmann, Juergen Debus, Florian Sterzing
BACKGROUND: Though the vast majority of seminal trials for locally advanced esophageal cancer (EC) utilized three-dimensional conformal radiotherapy (3DCRT), the advanced and highly conformal technology known as intensity-modulated radiotherapy (IMRT) can decrease doses to critical cardiopulmonary organs. To date, there have been no studies comparing both modalities as part of definitive chemoradiation (dCRT) for EC. Herein, we investigated local control and survival and evaluated clinical factors associated with these endpoints between cohorts...
August 15, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28711478/dosimetric-comparison-of-peripheral-nsclc-sbrt-using-acuros-xb-and-aaa-calculation-algorithms
#17
Chloe C H Ong, Khong Wei Ang, Roger C X Soh, Kah Ming Tin, Jerome H H Yap, James C L Lee, Christopher M Bragg
There is a concern for dose calculation in highly heterogenous environments such as the thorax region. This study compares the quality of treatment plans of peripheral non-small cell lung cancer (NSCLC) stereotactic body radiation therapy (SBRT) using 2 calculation algorithms, namely, Eclipse Anisotropic Analytical Algorithm (AAA) and Acuros External Beam (AXB), for 3-dimensional conformal radiation therapy (3DCRT) and volumetric-modulated arc therapy (VMAT). Four-dimensional computed tomography (4DCT) data from 20 anonymized patients were studied using Varian Eclipse planning system, AXB, and AAA version 10...
July 12, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28656685/impacts-of-lung-and-tumor-volumes-on-lung-dosimetry-for-nonsmall-cell-lung-cancer
#18
Weijie Lei, Jing Jia, Ruifen Cao, Jing Song, Liqin Hu
The purpose of this study was to determine the impacts of lung and tumor volumes on normal lung dosimetry in three-dimensional conformal radiotherapy (3DCRT), step-and-shoot intensity-modulated radiotherapy (ssIMRT), and single full-arc volumetric-modulated arc therapy (VMAT) in treatment of nonsmall cell lung cancers (NSCLC). All plans were designed to deliver a total dose of 66 Gy in 33 fractions to PTV for the 32 NSCLC patients with various total (bilateral) lung volumes, planning target volumes (PTVs), and PTV locations...
June 28, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28643745/adjuvant-hypofractionated-radiation-in-carcinoma-breast-photon-versus-electron-comparison-of-treatment-outcome
#19
G Prameela Chelakkot, Rahul Ravind, K Sruthi, Namrata Chigurupati, Sanketh Kotne, Raghavendra Holla, Ram Madhavan, M Dinesh
BACKGROUND: Breast cancer tissue is sensitive to hypofractionation. This is an analysis of patients treated with hypofractionated protocols since 2009, at our tertiary cancer center. METHODS: Details of breast cancer patients treated with adjuvant hypofractionated external beam radiation therapy (EBRT) from January 2009 to December 2014 were retrieved and analyzed. RESULTS: One thousand seven hundred and eighty patients received adjuvant EBRT during this period...
April 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28640871/nomogram-to-predict-rectal-toxicity-following-prostate-cancer-radiotherapy
#20
Jean-Bernard Delobel, Khemara Gnep, Juan David Ospina, Véronique Beckendorf, Ciprian Chira, Jian Zhu, Alberto Bossi, Taha Messai, Oscar Acosta, Joël Castelli, Renaud de Crevoisier
BACKGROUND: To identify predictors of acute and late rectal toxicity following prostate cancer radiotherapy (RT), while integrating the potential impact of RT technique, dose escalation, and moderate hypofractionation, thus enabling us to generate a nomogram for individual prediction. METHODS: In total, 972 patients underwent RT for localized prostate cancer, to a total dose of 70 Gy or 80 Gy, using two different fractionations (2 Gy or 2.5 Gy/day), by means of several RT techniques (3D conformal RT [3DCRT], intensity-modulated RT [IMRT], or image-guided RT [IGRT])...
2017: PloS One
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