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https://www.readbyqxmd.com/read/29155480/intensity-modulated-radiotherapy-for-elderly-patients-with-nasopharyngeal-carcinoma
#1
Caineng Cao, Qiaoying Hu, Xiaozhong Chen
BACKGROUND: The purpose of this study was to evaluate the clinical outcomes and patterns of failure after intensity-modulated radiotherapy (IMRT) for elderly patients with nasopharyngeal carcinoma (NPC). METHODS: Fifty-two patients treated with IMRT were eligible for study inclusion. Comorbidity was rated using the Adult Comorbidity Evaluation-27 (ACE-27) system. RESULTS: Twenty-six patients (50.0%) had an ACE-27 score of 1; and 6 (11.5%) had an ACE-27 score of 2...
November 20, 2017: Head & Neck
https://www.readbyqxmd.com/read/29152430/a-dosimetric-comparison-of-intensity-modulated-proton-therapy-volumetric-modulated-arc-therapy-and-4%C3%AF-non-coplanar-intensity-modulated-radiation-therapy-for-a-patient-with-parameningeal-rhabdomyosarcoma
#2
Tiffany W Chen, Julian Sison, Becky Lee, Arthur J Olch, Andrew Chang, Annelise Giebeler, Kenneth Wong
Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma in children and manifests as two major histological subtypes: embryonal and alveolar. The five-year local failure rate for RMS at parameningeal sites (middle ear, mastoid region, nasal cavity, etc.) is around 17% despite multiple Intergroup Rhabdomyosarcoma Study Group (IRS) trials conducted to determine the optimal radiation treatment regimen. This case report explores the use of intensity-modulated proton therapy (IMPT) for a 10-year-old child who presented with left eye irritation, facial pain, and headaches and was found to have an alveolar parameningeal rhabdomyosarcoma...
September 10, 2017: Curēus
https://www.readbyqxmd.com/read/29152425/stereotactic-body-radiotherapy-for-low-risk-prostate-cancer-a-ten-year-analysis
#3
Alan Katz
Objective This study represents the first 10 year analysis of the efficacy and toxicity of stereotactic body radiotherapy (SBRT) in the treatment of early low-risk prostate cancer. Materials and methods Two hundred and thirty males were treated with Cyberknife SBRT to a dose of 35 Gray (Gy) or 36.25 Gy in five consecutive days. All patients had a Gleason score of six and a PSA < 10ng/ml. Median follow-up is nine years. The median age was 69.5 years and median prostate specific antigen (PSA) was 5.6ng/ml...
September 9, 2017: Curēus
https://www.readbyqxmd.com/read/29151959/survival-and-toxicities-of-imrt-based-on-the-rtog-protocols-in-patients-with-nasopharyngeal-carcinoma-from-the-endemic-regions-of-china
#4
Shao-Bo Liang, Yan Wang, Xue-Feng Hu, Sha-Sha He, Xing-Li Yang, Li-Zhi Liu, Chun-Yan Cui, Yong Chen, Li-Wu Fu
Background: This study evaluated the survival outcomes and toxicities of intensity-modulated radiation therapy (IMRT) based on the RTOG 0225/0615 RT protocols in patients with nasopharyngeal carcinoma (NPC) from a region of China where this tumor type is endemic. Methods: A total of 455 patients with non-metastatic, histologically-confirmed NPC were retrospectively reviewed. All patients were treated by IMRT using the RTOG 0225/0615 RT protocols; 91.1% (288/316) of patients with stage III-IVb NPC received concurrent chemotherapy +/- induction chemotherapy or adjuvant chemotherapy...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/29141779/five-field-imrt-class-solutions-and-dosimetric-planning-guidelines-for-implementing-accelerated-partial-breast-irradiation
#5
Sarah Quirk, Petra Grendarova, Michael Roumeliotis
PURPOSE: A comprehensive set of planning guidelines was developed to aid in achieving reproducible dosimetric results for external beam accelerated partial breast irradiation (APBI). The methodology for the development of class solutions for dosimetric planning of the APBI technique, including dose constraint recommendations, is presented for target coverage and conformity as well as normal tissues. METHODS AND MATERIALS: A conservative patient setup was simulated on a linear accelerator, and a comprehensive arrangement of gantry and couch angles was measured for clearance...
September 28, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/29141396/proposal-of-a-pretreatment-nomogram-for-predicting-local-recurrence-after-intensity-modulated-radiation-therapy-in-t4-nasopharyngeal-carcinoma-a-retrospective-review-of-415-chinese-patients
#6
Lu-Lu Zhang, Yi-Yang Li, Jiang Hu, Guan-Qun Zhou, Lei Chen, Wen-Fei Li, Ai-Hua Lin, Jun Ma, Zhen-Yu Qi, Ying Sun
Purpose: Local relapse-free survival (LRFS) differs widely among patients with T4 category nasopharyngeal carcinoma (NPC). We aimed to build a nomogram incorporating clinicopathological information to predict LRFS in T4 NPC after definitive intensity-modulated radiation therapy (IMRT). Methods and Materials: Retrospective study of 415 Chinese patients with non-metastatic T4 NPC treated with definitive IMRT with or without chemotherapy at our cancer center between October 2009 and September 2013...
November 15, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/29139208/a-knowledge-based-approach-to-automated-planning-for-hepatocellular-carcinoma
#7
Yujie Zhang, Tingting Li, Han Xiao, Weixing Ji, Ming Guo, Zhaochong Zeng, Jianying Zhang
PURPOSE: To build a knowledge-based model of liver cancer for Auto-Planning, a function in Pinnacle, which is used as an automated inverse intensity modulated radiation therapy (IMRT) planning system. METHODS AND MATERIALS: Fifty Tomotherapy patients were enrolled to extract the dose-volume histograms (DVHs) information and construct the protocol for Auto-Planning model. Twenty more patients were chosen additionally to test the model. Manual planning and automatic planning were performed blindly for all twenty test patients with the same machine and treatment planning system...
November 15, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29135471/first-patients-treated-with-a-1-5-t-mri-linac-clinical-proof-of-concept-of-a-high-precision-high-field-mri-guided-radiotherapy-treatment
#8
B W Raaymakers, I M Jürgenliemk-Schulz, G H Bol, M Glitzner, A N T J Kotte, B van Asselen, J C J de Boer, J J Bluemink, S L Hackett, M A Moerland, S J Woodings, J W H Wolthaus, H M van Zijp, M E P Philippens, R Tijssen, J G M Kok, E N de Groot-van Breugel, I Kiekebosch, L T C Meijers, C N Nomden, G G Sikkes, P A H Doornaert, W S C Eppinga, N Kasperts, L G W Kerkmeijer, J H A Tersteeg, K J Brown, B Pais, P Woodhead, J J W Lagendijk
The integration of 1.5 T MRI functionality with a radiotherapy linear accelerator (linac) has been pursued since 1999 by the UMC Utrecht in close collaboration with Elekta and Philips. The idea behind this integrated device is to offer unrivalled, online and real-time, soft-tissue visualization of the tumour and the surroundings for more precise radiation delivery. The proof of concept of this device was given in 2009 by demonstrating simultaneous irradiation and MR imaging on phantoms, since then the device has been further developed and commercialized by Elekta...
November 14, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29132644/delineating-sites-of-failure-following-post-prostatectomy-radiation-treatment-using-68-ga-psma-pet
#9
Keelan Byrne, Thomas Eade, Andrew Kneebone, Linxin Guo, Ed Hsiao, Geoff Schembri, Carolyn Kwong, Julia Hunter, Louise Emmett, George Hruby
PURPOSE: To identify sites of failure with (68)Ga-PSMA-PET (PSMA-PET) imaging in patients who have Biochemical Failure (BF) following post-prostatectomy radiotherapy. MATERIAL AND METHODS: Between June 2006 and January 2016, 409 men received post prostatectomy intensity modulated radiation treatment (IMRT) with protocolised planning. 310 patients received radiation treatment (RT) to the Prostate Fossa (PF) alone and 99 patients received RT to PF and pelvic lymphatics (PF + LN) usually in combination with androgen deprivation (AD) therapy...
November 10, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29131409/field-size-correction-factors-of-a-radiophotoluminescent-glass-dosimeter-for-small-field-and-intensity-modulated-radiation-therapy-beams
#10
Shimpei Hashimoto, Yukio Fujita, Tetsurou Katayose, Hideyuki Mizuno, Hidetoshi Saitoh, Katsuyuki Karasawa
PURPOSE: We evaluated the energy responses of a radiophotoluminescent glass dosimeter (RPLD) to variations in small-field and intensity-modulated radiation therapy (IMRT) conditions using experimental measurements and Monte Carlo simulation. METHODS: Several sizes of the jaw and multileaf collimator fields and various plan-class IMRT-beam measurements were performed using the RPLD and an ionization chamber. The field-size correction factor for the RPLD was determined for 6- and 10-MV X-rays...
November 13, 2017: Medical Physics
https://www.readbyqxmd.com/read/29130584/long-term-outcomes-after-reirradiation-in-nasopharyngeal-carcinoma-with-intensity-modulated-radiotherapy-a-meta-analysis
#11
REVIEW
Yiat Horng Leong, Yu Yang Soon, Khai Mun Lee, Lea Choung Wong, Ivan Weng Keong Tham, Francis Cho Hao Ho
BACKGROUND: The purpose of this clinical review was to summate the published data for the long-term outcomes of reirradiation with intensity-modulated radiotherapy (IMRT) for locally recurrent nasopharyngeal carcinoma (NPC). METHODS: We searched biomedical literature databases for eligible studies published from January 2005 to September 2016. Outcomes of interests were 5-year local failure-free survival, distant failure-free survival, overall survival (OS), and toxicities...
November 11, 2017: Head & Neck
https://www.readbyqxmd.com/read/29129577/pelvic-bone-anatomy-vs-implanted-gold-seed-marker-registration-for-image-guided-intensity-modulated-radiotherapy-for-prostate-carcinoma-comparative-analysis-of-inter-fraction-motion-and-toxicities
#12
Madhup Rastogi, Sambit Swarup Nanda, Ajeet Kumar Gandhi, Divakar Dalela, Rohini Khurana, Surendra Prasad Mishra, Anoop Srivastava, S Farzana, Madan Lal Brahma Bhatt, Nuzhat Husain
OBJECTIVES: We compared the prostate motion variability and toxicities between patients treated with gold marker registration based IG-IMRT (IG-IMRT-M) and bony landmark registration based IG-IMRT (IG-IMRT-B). METHODS: T1c-T3b (node negative), intermediate and high risk (non-metastatic) adenocarcinoma of prostate, age ≥18years, Karnofsky Performance Status of ≥70 were included in this retrospective study. The prostate motion variability, acute and late radiation toxicities between the two treatment arms (IG-IMRT-M versus IG-IMRT-B) were compared...
November 9, 2017: Journal of the Egyptian National Cancer Institute
https://www.readbyqxmd.com/read/29129125/clinical-efficacy-and-safety-of-a-highly-conformal-supine-hybrid-forward-and-inverse-planned-intensity-modulated-radiation-therapy-technique-for-craniospinal-irradiation
#13
Safia K Ahmed, Jon J Kruse, Thomas B Bradley, Chris J Beltran, Nadia N Issa Laack
PURPOSE: To demonstrate the clinical efficacy and safety of a highly conformal, supine, hybrid forward and inverse planned intensity modulated radiation therapy (IMRT) technique for photon craniospinal irradiation (CSI). METHODS: Patients who received supine, hybrid IMRT CSI from 2009 to 2014 were included in this retrospective review. Clinical target volume (CTV) was defined as intracranial contents and thecal sac, including nerve roots. Dose was prescribed such that >99% of CTV received >99% of prescription and >95% of the planning target volume received >95% of prescription, with no attempt to include vertebral bodies...
November 12, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29119677/minimal-mask-immobilization-with-optical-surface-guidance-for-head-and-neck-radiotherapy
#14
Bo Zhao, Genevieve Maquilan, Steve Jiang, David L Schwartz
PURPOSE: Full face and neck thermoplastic masks provide standard-of-care immobilization for patients receiving H&N IMRT. However, these masks are uncomfortable and increase skin dose. The purpose of this pilot trial was to investigate the feasibility and setup accuracy of minimal face and neck mask immobilization with optical surface guidance. METHODS: Twenty patients enrolled onto this IRB-approved protocol. Patients were immobilized with masks securing only forehead and chin...
November 9, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29114611/2d-kv-orthogonal-imaging-with-fiducial-markers-is-more-precise-for-daily-image-guided-alignments-than-soft-tissue-cone-beam-computed-tomography-for-prostate-radiation-therapy
#15
Peter H Goff, Louis B Harrison, Eli Furhang, Evan Ng, Stephen Bhatia, Frieda Trichter, Ronald D Ennis
Purpose: The hypothesis is that 2-dimensional kV orthogonal imaging with fiducial markers (kV-FM) and soft-tissue cone beam computed tomography (ST-CBCT) are equally reproducible for daily positional alignments for image guided (IG) intensity modulated radiation therapy (IMRT) for prostate cancer. Methods and materials: Ten patients undergoing definitive treatment for prostate cancer with IG-IMRT were imaged daily with kV-FM and ST-CBCT. For each acquired kV and CBCT image, offline alignments to the digitally reconstructed radiograph or planning CT, respectively, were made twice by the same physician to assess intraobserver test-retest reproducibility...
July 2017: Advances in Radiation Oncology
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
#16
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/29114602/impact-on-quality-of-life-of-imrt-versus-3-d-conformal-radiation-therapy-in-head-and-neck-cancer-patients-a-case-control-study
#17
Edvard Abel, Ewa Silander, Jan Nyman, Mogens Bove, Leif Johansson, Thomas Björk-Eriksson, Eva Hammerlid
Objective: The purpose of this study was to prospectively and longitudinally compare the health-related quality of life (HRQOL) outcomes between head and neck (HN) cancer patients treated with parotid-sparing intensity modulated radiation therapy (IMRT) and patients treated with 3-dimensional conventional radiation therapy (3D-CRT). Methods and materials: Before and up to 12 months after treatment, HRQOL was recorded in patients with HN cancer who were referred to the Department of Oncology at Sahlgrenska University Hospital for curative IMRT...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29114598/long-term-survival-and-toxicity-outcomes-of-intensity-modulated-radiation-therapy-for-the-treatment-of-esophageal-cancer-a-large-single-institutional-cohort-study
#18
Anhui Shi, Zhongxing Liao, Pamela K Allen, Linus Ho, Mariela Blum Murphy, Dipen M Maru, Stephen G Swisher, Wayne L Hofstetter, Reza J Mehran, James D Cox, Ritsuko Komaki, Steven H Lin
Purpose: In patients with esophageal cancer (EC), intensity modulated radiation therapy (IMRT) improves dose sparing to the heart and lung, with some evidence showing clinical benefit. Herein, we report our cumulative clinical experience with the use of IMRT for EC. Methods and materials: This is a retrospective analysis of 587 patients with nonmetastatic EC who were treated consecutively with IMRT from January 2004 to June 30, 2013. All patients with stage I-IVA (American Joint Committee on Cancer 2002) received concurrent chemoradiation therapy either preoperatively or definitively...
July 2017: Advances in Radiation Oncology
https://www.readbyqxmd.com/read/29110926/study-for-reducing-lung-dose-of-upper-thoracic-esophageal-cancer-radiotherapy-by-auto-planning-volumetric-modulated-arc-therapy-vs-intensity-modulated-radiation-therapy
#19
Hua Chen, Hao Wang, Hengle Gu, Yan Shao, Xuwei Cai, Xiaolong Fu, Zhiyong Xu
This study aimed to investigate the dosimetric differences and lung sparing between volumetric-modulated arc therapy (VMAT) and intensity-modulated radiation therapy (IMRT) in the treatment of upper thoracic esophageal cancer with T3N0M0 for preoperative radiotherapy by auto-planning (AP). Sixteen patient cases diagnosed with upper thoracic esophageal cancer T3N0M0 for preoperative radiotherapy were retrospectively studied, and 3 plans were generated for each patient: full arc VMAT AP plan with double arcs, partial arc VMAT AP plan with 6 partial arcs, and conventional IMRT AP plan...
October 27, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/29110925/a-novel-imrt-planning-study-by-using-the-fixed-jaw-method-in-the-treatment-of-peripheral-lung-cancer-with-mediastinal-lymph-node-metastasis
#20
Hao Wang, Hua Chen, Hengle Gu, Yan Shao, Xuwei Cai, Xiaolong Fu, Zhiyong Xu
Intensity-modulated radiotherapy (IMRT) is an important technology in cancer radiotherapy. In the current planning system, such as in the Pinnacle(3) system, jaw positions are automatically set to cover all target volumes, and many medical centers in developing countries are not equipped with linear accelerators with a jaw tracing function. As solitary lesions are often located in patients, the resulting radiation leakage and transmission increase the dose exposure in surrounding critical organs, although blocked by multileaf collimator (MLC) leaves...
October 27, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
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