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Helical tomotherapy

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https://www.readbyqxmd.com/read/28435647/helical-tomotherapy%C3%A2-is-a-safe-and-feasible-technique-for-total-scalp-irradiation
#1
Francesco Cuccia, Vanessa Figlia, Antonella Palmeri, Francesco Verderame, Antonio Lo Casto, Mariella Mannino, Giuseppe Ferrera
Angiosarcoma of the scalp is a rare aggressive tumor that affects elderly patients. Chemoradiation is the treatment of choice for multicentric and extensive disease. The shape of the scalp represents a dosimetric challenge in terms of achieving a homogeneous concave dose distribution with coverage of the entire target volume and an acceptable organs-at-risk sparing. We report a case of an 81-year-old man with a multifocal angiosarcoma of the scalp treated with Helical TomoTherapy® (Accuray Inc., Sunnyvale, CA, USA) intensity modulated radiotherapy...
March 24, 2017: Rare Tumors
https://www.readbyqxmd.com/read/28412923/fdg-pet-ct-predicts-outcome-in-oropharingeal-carcinoma-patients-undergoing-intensity-modulated-radiation-therapy-with-dose-escalation-to-fdg-avid-tumour-volumes
#2
Paola Mapelli, Sara Broggi, Elena Incerti, Pierpaolo Alongi, Margarita Kirienko, Claudio Fiorino, Italo Dell Oca, Federico Fallanca, Emilia Giovanna Vanoli, Nadia Gisella Di Muzio, Luigi Gianolli, Maria Picchio
PURPOSE: To evaluate the predictive value of FDG-PET/CT parameters on outcome of oropharyngeal squamocellular cancer (OSCC) patients undergoing helical tomotherapy (HTT), with dose escalation to FDG-PET/CT positive tumour volumes using the simultaneous integrated boost (SIB) technique. MATERIALS AND METHODS: We analysed 41 patients studied by FDG-PET/CT and treated with radical intent between 2005 and 2014 for OSCC. HTT-SIB was delivered in 30 fractions concomitantly: 69 Gy, as SIB, to the PET-positive volume (biological target volume - BTV-PET), both to the primary tumour (T) and lymph nodes (N), 66 Gy to the T and positive N, 54 Gy to the laterocervical nodes at risk...
April 13, 2017: Current Radiopharmaceuticals
https://www.readbyqxmd.com/read/28410684/knowledge-based-treatment-planning-an-inter-technique-and-inter-system-feasibility-study-for-prostate-cancer
#3
Elisabetta Cagni, Andrea Botti, Renato Micera, Maria Galeandro, Roberto Sghedoni, Matteo Orlandi, Cinzia Iotti, Luca Cozzi, Mauro Iori
PURPOSE: Helical Tomotherapy (HT) plans were used to create two RapidPlan knowledge-based (KB) models to generate plans with different techniques and to guide the optimization in a different treatment planning system for prostate plans. Feasibility and performance of these models were evaluated. MATERIAL AND METHODS: two sets of 35 low risk (LR) and 30 intermediate risk (IR) prostate cancer cases who underwent HT treatments were selected to train RapidPlan models...
April 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28398210/out-of-field-doses-from-pediatric-craniospinal-irradiations-using-3d-crt-imrt-helical-tomotherapy-and-electron-based-therapy
#4
Marijke De Saint-Hubert, Dirk Verellen, Kenneth Poels, Wouter Crijns, Federica Magliona, Tom Depuydt, Filip Vanhavere, Lara Struelens
Medulloblastoma treatment involves irradiation of the entire central nervous system, i.e craniospinal irradiation (CSI). This is associated with significant exposure of large volumes of healthy tissue with a growing concern regarding treatment associated side effects. The current study compares out-of-field organ doses in children receiving CSI with three-dimensional-conformal radiotherapy (3D-CRT), intensity modulated radiotherapy (IMRT), helical tomotherapy (HT) and an electron-based technique, including as well radiation doses resulting from imaging performed during treatment...
April 11, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28357632/radiotherapy-for-adrenal-gland-metastases-from-hepatocellular-carcinoma
#5
B-Y Yuan, Y Hu, L Zhang, Y-H Chen, Y-Y Dong, Z-C Zeng
BACKGROUND: Several studies have found benefits of radiotherapy for adrenal metastasis from hepatocellular carcinoma (HCC). However, the efficacy, safety and outcome issues have not yet been fully addressed. Therefore, we performed this study to further elucidate the feasibility and outcome of radiotherapy in treating adrenal metastasis from HCC. METHODS: We retrospectively analyzed 81 patients with adrenal metastasis from HCC between 2001 and 2015. Eighteen patients received helical tomotherapy and 63 patients received conventional radiotherapy, including two-dimensional (2-D) or three-dimensional conformal radiotherapy (3-D CRT)...
March 29, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28314468/constraints-for-symptomatic-radiation-pneumonitis-of-helical-tomotherapy-hypofractionated-simultaneous-multitarget-radiotherapy-for-pulmonary-metastasis-from-hepatocellular-carcinoma
#6
Genlai Lin, Han Xiao, Zhaochong Zeng, Zhiyong Xu, Jian He, Taiwei Sun, Jin Liu, Genwu Guo, Weixing Ji, Yong Hu
BACKGROUND AND PURPOSE: This study was aimed to identify the clinical and dosimetric parameters that predict symptomatic radiation pneumonitis (SRP, radiation pneumonitis≥2 grade) in patients with pulmonary metastasis from hepatocellular carcinoma (HCC) after helical tomotherapy (HT) hypofractionated simultaneous multitarget radiotherapy. MATERIALS AND METHODS: 62 patients with 407 pulmonary metastases from HCC were consecutively treated with HT. The median radiation dose was a 49...
March 14, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28297444/surface-imaging-laser-positioning-or-volumetric-imaging-for-breast-cancer-with-nodal-involvement-treated-by-helical-tomotherapy
#7
Frederik Crop, David Pasquier, Amandine Baczkiewic, Julie Doré, Lena Bequet, Emeline Steux, Anne Gadroy, Jacqueline Bouillon, Clement Florence, Laurence Muszynski, Mathilde Lacour, Eric Lartigau
A surface imaging system, Catalyst (C-Rad), was compared with laser-based positioning and daily mega voltage computed tomography (MVCT) setup for breast patients with nodal involvement treated by helical TomoTherapy. Catalyst-based positioning performed better than laser-based positioning. The respective modalities resulted in a standard deviation (SD), 68% confidence interval (CI) of positioning of left-right, craniocaudal, anterior-posterior, roll: 2.4 mm, 2.7 mm, 2.4 mm, 0.9° for Catalyst positioning, and 6...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297441/comprehensive-dosimetric-planning-comparison-for-early-stage-non-small-cell-lung-cancer-with-sabr-fixed-beam-imrt-versus-vmat-versus-tomotherapy
#8
Ilma Xhaferllari, Omar El-Sherif, Stewart Gaede
Volumetric-modulated arc therapy (VMAT) is emerging as a leading technology in treating early-stage, non-small cell lung cancer (NSCLC) with stereotactic ablative radiotherapy (SABR). However, two other modalities capable of delivering intensity-modulated radiation therapy (IMRT) include fixed-beam and helical TomoTherapy (HT). This study aims to provide an extensive dosimetric comparison among these various IMRT techniques for treating early-stage NSCLC with SABR. Ten early-stage NSCLC patients were retrospectively optimized using three fixed-beam techniques via nine to eleven beams (high and low modulation step-and-shoot (SS), and sliding window (SW)), two VMAT techniques via two partial arcs (SmartArc (SA) and RapidArc (RA)), and three HT techniques via three different fan beam widths (1 cm, 2...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28291935/helical-tomotherapy-to-linac-plan-conversion-utilizing-raystation-fallback-planning
#9
Xin Zhang, Jose Penagaricano, Ganesh Narayanasamy, Peter Corry, TianXiao Liu, Maraboyina Sanjay, Nava Paudel, Steven Morrill
RaySearch RayStation Fallback (FB) planning module can generate an equivalent backup radiotherapy treatment plan facilitating treatment on other linear accelerators. FB plans were generated from the RayStation FB module by simulating the original plan target and organ at risk (OAR) dose distribution and delivered in various backup linear accelerators. In this study, helical tomotherapy (HT) backup plans used in Varian TrueBeam linear accelerator were generated with the RayStation FB module. About 30 patients, 10 with lung cancer, 10 with head and neck (HN) cancer, and 10 with prostate cancer, who were treated with HT, were included in this study...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28270323/toxicity-and-early-clinical-outcomes-in-cervical-cancer-following-extended-field-helical-tomotherapy-to-para-aortic-lymph-nodes
#10
MULTICENTER STUDY
E Jouglar, L Thomas, A de la Rochefordière, G Noël, M Le Blanc-Onfroy, G Delpon, L Campion, M-A Mahé
PURPOSE: To evaluate toxicity and early disease outcome among patients treated for cervical cancer with extended-field helical tomotherapy to the para-aortic nodes. PATIENTS AND METHODS: Thirty-eight patients (International Federation of Gynecology and Obstetrics [FIGO] stage IB2-IVA) from four institutions received extended-field helical tomotherapy and were retrospectively evaluated. All had nodal disease. Para-aortic lymph nodes were involved in 31 patients. Patients were assessed for toxicity using version 4 of the National Cancer Institute's common terminology criteria for adverse events...
December 2016: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28270018/therapeutic-benefits-in-grid-irradiation-on-tomotherapy-for-bulky-radiation-resistant-tumors
#11
Ganesh Narayanasamy, Xin Zhang, Ali Meigooni, Nava Paudel, Steven Morrill, Sanjay Maraboyina, Loverd Peacock, Jose Penagaricano
INTRODUCTION: Spatially fractionated radiation therapy (SFRT or grid therapy) has proven to be effective in management of bulky tumors. The aim of this project is to study the therapeutic ratio (TR) of helical Tomotherapy (HT)-based grid therapy using linear-quadratic cell survival model. MATERIAL AND METHODS: HT-based grid (or HT-GRID) plan was generated using a patient-specific virtual grid pattern of high-dose cylindrical regions using MLCs. TR was defined as the ratio of normal tissue surviving fraction (SF) under HT-GRID irradiation to an open debulking field of an equivalent dose that result in the same tumor cell SF...
March 8, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28256158/treatment-outcomes-and-patterns-of-radiologic-appearance-after-hypofractionated-image-guided-radiotherapy-delivered-with-helical-tomotherapy-hht-for-lung-tumours
#12
Stefano Arcangeli, Lorenzo Falcinelli, Stefano Bracci, Alessandro Greco, Alessia Monaco, Jessica Dognini, Cinzia Chiostrini, Rita Bellavita, Cynthia Aristei, Vittorio Donato
OBJECTIVE: To evaluate treatment outcomes and patterns of CT lung injury after hypofractionated image-guided radiotherapy delivered with helical tomotherapy (HHT) in a series of inoperable lung lesions. METHODS: 68 patients who were medically inoperable (69 lesions) without evidence of viable extrathoracic disease were included. Dose prescription was driven by tumour location (hilar/pericentral vs peripheral) and/or target volume. 52% of the lesions received a biological equivalent dose (BED10) ≥100 Gy...
March 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28255431/helical-tomotherapy-for-duodenal-adenocarcinoma-in-an-elderly-patient-a-case-report
#13
Valentina Lancellotta, Giuseppe Russo, Marco Lupattelli, Martina Iacco, Elisabetta Perrucci, Claudio Zucchetti, Lorenzo Falcinelli, Cynthia Aristei
To evaluate the efficacy and feasibility of external beam radiotherapy (EBRT) for duodenal adenocarcinoma in an 84-year-old female who underwent EBRT (2.2 Gy/d for a total dose of 46.2 Gy) using helical tomotherapy (HT). Toxicity was evaluated on the National Cancer Institute's common toxicity criteria (CTCAE 3.0). The patient completed the treatment without G3-G4 toxicity. After 22-mo follow-up, she is alive and well, in complete remission with no late side effects. HT seems to be feasible and effective for duodenal adenocarcinoma in old to very old patients...
February 15, 2017: World Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28214420/prevention-of-radiotherapy-induced-neurocognitive-dysfunction-in-survivors-of-paediatric-brain-tumours-the-potential-role-of-modern-imaging-and-radiotherapy-techniques
#14
REVIEW
Thankamma Ajithkumar, Stephen Price, Gail Horan, Amos Burke, Sarah Jefferies
Neurocognitive dysfunction is the leading cause of reduced quality of life in long-term survivors of paediatric brain tumours. Radiotherapy is one of the main contributors to neurocognitive sequelae. Current approaches for prevention and reduction of neurocognitive dysfunction include avoidance of radiotherapy in young children and reduction of the radiotherapy dose and volume of brain irradiated. Substantial advances have been made in brain imaging, especially with functional imaging and fibre tracking with the use of diffusion tensor imaging...
February 2017: Lancet Oncology
https://www.readbyqxmd.com/read/28199977/pre-radiotherapy-neutrophil-to-lymphocyte-ratio-as-an-independent-prognostic-factor-in-patients-with-locally-advanced-hepatocellular-carcinoma-treated-with-radiotherapy
#15
Seok Hyun Son, Eun Young Park, Hee Hyun Park, Chul Seung Kay, Hong Seok Jang
We aimed to investigate the pre-radiotherapy neutrophil-to-lymphocyte ratio (prNLR) as a prognostic factor in patients with locally advanced hepatocellular carcinoma (HCC) treated with radiotherapy (RT), and to determine the optimal cut-off value for prNLR. We retrospectively evaluated 56 patients with locally advanced HCC treated with RT (helical tomotherapy) between March 2006 and February 2012. The optimal cut-off value was determined by using a maximally selected log-rank test. Prognostic factors that influence the local progression-free survival (PFS) and overall survival (OS) were evaluated...
March 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28159930/compared-planning-dosimetry-of-tomo-vmat-and-imrt-in-rectal-cancer-with-different-simulated-positions
#16
Jang-Chun Lin, Jo-Ting Tsai, Li-Jhen Chen, Ming-Hsien Li, Wei-Hsiu Liu
OBJECTIVES: To compare treatment plans for helical tomotherapy (TOMO), volumetric modulated arc therapy (VMAT) and intensity-modulated radiotherapy (IMRT) for locally advanced rectal cancer (LARC). MATERIALS AND METHODS: This retrospective study from December 2010 to June 2013 included 20 patients with LARC who received neoadjuvant concurrent chemoradiotherapy (CCRT) with radiation doses of greater than 50.4 Gy. Dosimetric quality was evaluated based on doses to organs at risk (OARs), including small bowel, urinary bladder and bilateral femoral head, over the same coverage of the clinical target volume (CTV)...
January 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28155608/helical-tomotherapy-versus-conventional-technique-for-post-mastectomy-left-sided-breast-cancer-dosimetric-study
#17
M O Alshabanah, Mohamed Hegazy, Belal Moftah, Mohammad Shabanah
METHODS AND MATERIALS: Treatment plans were generated for 5 post mastectomy left sided breast cancer patients treated at king Faisal Specialist Hospital & Research Center, Riyadh, Saudi Arabia, comparing three-dimensional technique with the HT planning. The prescribed dose was 50 Gy in 25 fractions; the planning target volume (chest wall and nodal volumes) was contoured according to RTOG atlas and the heart, lungs, spinal cord and contralateral breast were contoured as Organs at Risks (OARs)...
February 1, 2017: Reviews on Recent Clinical Trials
https://www.readbyqxmd.com/read/28143487/helical-tomotherapy-of-spinal-chordomas-french-multicentric-retrospective-study-of-a-cohort-of-30-cases
#18
Maxime Bobin, Christina Zacharatou, Paul Sargos, Véronique Brouste, Albert Lisbona, Marc-André Mahé, Georges Noël, Amandine Halley, Loïc Feuvret, Louis Gras, Stéphanie Hoppe, Bénédicte Henriques de Figueiredo, Guy Kantor
PURPOSE: To evaluate the efficacy and toxicity of helical tomotherapy (HT) in the management of spine chordomas when proton therapy is unavailable or non-feasible. METHODS AND MATERIALS: Between 2007 and 2013, 30 patients with biopsy-proven chordomas were treated by HT in five French institutions. Information regarding local control (LC), overall survival (OS), progression-free survival (PFS) and metastasis-free survival (MFS) was collected. Clinical efficacy, toxicity and treatment quality were evaluated...
January 31, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28129971/dosimetric-aspects-of-breast-radiotherapy-with-three-dimensional-and-intensity-modulated-radiotherapy-helical-tomotherapy-planning-modules
#19
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/28129767/helical-tomotherapy-for-locally-advanced-or-recurrent-breast-cancer
#20
M N Duma, C Heinrich, C Schönknecht, B Chizzali, M Mayinger, M Devecka, S Kampfer, S E Combs
PURPOSE: We report our experience of using helical tomotherapy (HT) to treat large and irregular shaped loco-regional advanced breast cancer target volumes embracing various organs at risk. PATIENTS AND METHODS: We retrospectively analyzed 26 patients treated for very large, irregular shaped breast cancers. Patients were treated either with the intent to achieve local control in a primary setting (n = 14) or in a reirradiation setting (n = 12). The recurrence group was heavily pretreated with systemic therapy...
January 28, 2017: Radiation Oncology
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