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Stereotactic radiation therapy

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https://www.readbyqxmd.com/read/29052532/stereotactic-body-radiation-therapy-sbrt-for-definitive-treatment-and-as-a-bridge-to-liver-transplantation-in-early-stage-inoperable-hepatocellular-carcinoma
#1
Assaf Moore, Michal Cohen-Naftaly, Anna Tobar, Yulia Kundel, Ofer Benjaminov, Marius Braun, Assaf Issachar, Eytan Mor, Michal Sarfaty, Dimitri Bragilovski, Ran Ben Hur, Noa Gordon, Salomon M Stemmer, Aaron M Allen
BACKGROUND AND PURPOSE: Stereotactic body radiotherapy (SBRT) is an emerging modality for definitive treatment of Hepatocellular carcinoma (HCC). MATERIALS AND METHODS: This retrospective study included all early stage HCC patients who were not candidates for primary resection and/or local therapy, treated with SBRT between 11/2011 and 1/2016. RESULTS: Twenty-three patients were included. The median age was 62 years; 70% males; 30% females; 70% viral hepatitis carriers; 100% cirrhotic; 13 Child Pugh [CP]-A and 10 [CP]-B...
October 19, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29052514/five-fraction-sbrt-for-ultra-central-nsclc-in-field-recurrences-following-high-dose-conventional-radiation
#2
Michael C Repka, Nima Aghdam, Shaan K Kataria, Lloyd Campbell, Simeng Suy, Sean P Collins, Eric Anderson, Jonathan W Lischalk, Brian T Collins
PURPOSE/OBJECTIVE: Local treatment options for patients with in-field non-small cell lung cancer (NSCLC) recurrence following conventionally fractionated external beam radiation therapy (CF-EBRT) are limited. Stereotactic body radiation therapy (SBRT) is a promising modality to achieve reasonable local control, although toxicity remains a concern. MATERIALS/METHODS: Patients previously treated with high-dose CF-EBRT (≥59.4 Gy, ≤3 Gy/fraction) for non-metastatic NSCLC who underwent salvage SBRT for localized ultra-central in-field recurrence were included in this analysis...
October 19, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29051511/prospective-study-of-stereotactic-body-radiation-therapy-for-thymoma-and-thymic-carcinoma-therapeutic-effect-and-toxicity-assessment
#3
Xue-Jun Hao, Bo Peng, Zejun Zhou, Xue-Qin Yang
Stereotactic body radiation therapy (SBRT) is an important modality in treatment of tumors. We hypothesized that SBRT can achieve excellent local control with limited toxicity in patients with thymic tumors. A single-institution prospective study was performed with 32 patients who underwent SBRT of thymoma and thymic carcinoma between 2005 and 2014. Thirty-two patients including 39 target lesions were analyses in this study. Almost half of the patients (46.9%) were type C by histopathology and more than half (56...
October 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29050954/the-trendy-multi-center-randomized-trial-on-hepatocellular-carcinoma-trial-qa-including-automated-treatment-planning-and-benchmark-case-results
#4
Steven J M Habraken, Abdul Wahab M Sharfo, Jeroen Buijsen, Wilko F A R Verbakel, Cornelis J A Haasbeek, Michel C Öllers, Henrike Westerveld, Niek van Wieringen, Onne Reerink, Enrica Seravalli, Pètra M Braam, Markus Wendling, Thomas Lacornerie, Xavier Mirabel, Reinhilde Weytjens, Lieselotte Depuydt, Stephanie Tanadini-Lang, Oliver Riesterer, Karin Haustermans, Tom Depuydt, Roy S Dwarkasing, François E J A Willemsen, Ben J M Heijmen, Alejandra Méndez Romero
BACKGROUND AND PURPOSE: The TRENDY trial is an international multi-center phase-II study, randomizing hepatocellular carcinoma (HCC) patients between transarterial chemoembolization (TACE) and stereotactic body radiation therapy (SBRT) with a target dose of 48-54 Gy in six fractions. The radiotherapy quality assurance (QA) program, including prospective plan feedback based on automated treatment planning, is described and results are reported. MATERIALS AND METHODS: Scans of a single patient were used as a benchmark case...
October 16, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29048517/vertebral-compression-fracture-after-spine-stereotactic-body-radiation-therapy-a-review-of-the-pathophysiology-and-risk-factors
#5
Salman Faruqi, Chia-Lin Tseng, Cari Whyne, Majed Alghamdi, Jefferson Wilson, Sten Myrehaug, Hany Soliman, Young Lee, Pejman Maralani, Victor Yang, Charles Fisher, Arjun Sahgal
BACKGROUND: Vertebral compression fracture (VCF) is a challenging and not infrequent complication observed following spine stereotactic body radiation therapy (SBRT). OBJECTIVE: To summarize the data from the multiple studies that have been published, addressing the risk and predictive factors for VCF post-SBRT. METHODS: A systematic literature review was conducted. Studies were selected if they specifically addressed risk factors for post-SBRT VCF in their analyses...
October 18, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29045524/combined-irradiation-and-targeted-therapy-or-immune-checkpoint-blockade-in-brain-metastases-toxicities-and-efficacy
#6
A V Tallet, F Dhermain, E Le Rhun, G Noël, Y M Kirova
Background: Targeted therapies (TT) and immune checkpoint inhibitors (ICI) are currently modifying the landscape of metastatic cancer management and are increasingly used over the course of many cancers treatment. They allow long-term survival with controlled extra-cerebral disease, contributing to the increasing incidence of brain metastases (BMs). Radiation therapy remains the cornerstone of BMs treatment (either whole brain irradiation or stereotactic radiosurgery), and investigating the safety profile of radiation therapy combined with TT or ICI is of high interest...
August 2, 2017: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/29040778/multimodality-management-of-recurrent-skull-base-chordomas-factors-impacting-tumor-control-and-disease-specific-survival
#7
Shaan M Raza, Diana Bell, Jacob L Freeman, David R Grosshans, Gregory N Fuller, Franco DeMonte
BACKGROUND: Limited data exist to guide the management of recurrent chordomas arising in the skull base. OBJECTIVE: To determine factors affecting tumor control rates and disease-specific survival (DSS) in recurrent disease. METHODS: A retrospective review was performed of 29 patients with 55 recurrences treated at our institution. Tumor and treatment factors were assessed for impact on freedom from progression (FFP; primary outcome) and DSS (secondary outcome)...
October 10, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29038086/radiosurgery-for-treatment-of-renal-cell-metastases-to-spine-a-systematic-review-of-the-literature
#8
Brandon W Smith, Jacob R Joseph, Yamaan S Saadeh, Frank La Marca, Nicholas J Szerlip, Thomas C Schermerhorn, Daniel E Spratt, Kelly C Younge, Paul Park
BACKGROUND: The incidence of renal cell carcinoma (RCC) continues to rise, and the spine is the most common site for bony metastasis. Radiation therapy is one treatment for spinal RCC metastasis. Stereotactic body radiotherapy (SBRT) is a newer treatment that reportedly has benefits over conventional external beam radiotherapy (cEBRT). This study systematically reviewed the current literature on SBRT for metastatic RCC to spine. METHODS: A search of PubMed, Embase, and Scopus databases was conducted in accordance with PRISMA guidelines...
October 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29037215/melanoma-brain-metastases-treated-with-stereotactic-radiosurgery-and-concurrent-pembrolizumab-display-marked-regression-efficacy-and-safety-of-combined-treatment
#9
Erik S Anderson, Michael A Postow, Jedd D Wolchok, Robert J Young, Åse Ballangrud, Timothy A Chan, Yoshiya Yamada, Kathryn Beal
BACKGROUND: Brain metastases are common in patients with metastatic melanoma. With increasing numbers of melanoma patients on anti-PD-1 therapy, we sought to evaluate the safety and initial response of brain metastases treated with concurrent pembrolizumab and radiation therapy. METHODS: From an institutional database, we retrospectively identified patients with melanoma brain metastases treated with radiation therapy (RT) who received concurrent pembrolizumab. Concurrent treatment was defined as RT during pembrolizumab administration period and up to 4 months after most recent pembrolizumab treatment...
October 17, 2017: Journal for Immunotherapy of Cancer
https://www.readbyqxmd.com/read/29033377/proposed-treatment-paradigm-for-intracranial-chondrosarcomas-based-on-multidisciplinary-coordination
#10
Da Li, Jian-Cong Weng, Gui-Jun Zhang, Shu-Yu Hao, Jie Tang, Li-Wei Zhang, Liang Wang, Zhen Wu, Wang Jia, Jun-Ting Zhang
OBJECTIVES: There was no consensus regarding the treatment of intracranial chondrosarcoma (CSA). The study aimed to evaluate the adverse factors for progression-free survival (PFS) and overall survival (OS), and propose a treatment strategy for CSA. METHODS: The clinical chart and radiographic data of 106 consecutive cases (mesenchymal and conventional CSA in 18 and 88 patients, respectively) of surgically treated CSAs were retrospectively reviewed. RESULTS: Gross total resection was achieved in 43 patients (40...
October 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29029891/imaging-findings-within-the-first-12%C3%A2-months-of-hepatocellular-carcinoma-treated-with-stereotactic-body-radiation-therapy
#11
Mishal Mendiratta-Lala, Everett Gu, Dawn Owen, Kyle C Cuneo, Latifa Bazzi, Theodore S Lawrence, Hero K Hussain, Matthew S Davenport
PURPOSE: To correlate the imaging findings of treated hepatocellular carcinoma (HCC) after stereotactic body radiation therapy (SBRT) with explant pathology and alpha-fetoprotein (AFP) response. METHODS AND MATERIALS: From 2007 to 2015, of 146 patients treated with liver SBRT for Barcelona Clinic Liver Cancer stage A hepatocellular carcinoma, 10 were identified with inclusion criteria and had regular interval follow-up magnetic resonance imaging/triple phase computed tomography and explant pathology or declining AFP values for radiology-pathology response correlation...
August 24, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29017157/impact-of-the-number-of-metastatic-tumors-treated-by-stereotactic-radiosurgery-on-the-dose-to-normal-brain-implications-for-brain-protection
#12
Charlotte Rivers, Marissa Tranquilli, Shefalika Prasad, Evan Winograd, Robert J Plunkett, Robert A Fenstermaker, Andrew J Fabiano, Matthew B Podgorsak, Dheerendra Prasad
PURPOSE/OBJECTIVES: The purpose of this study was to evaluate the effect of the number of brain lesions for which stereotactic radiosurgery (SRS) was performed on the dose volume relationships in normal brain. MATERIALS AND METHODS: Brain tissue was segmented using the patient's pre-SRS MRI. For each plan, the following data points were recorded: total brain volume, number of lesions treated, volume of brain receiving 8 Gy (V8), V10, V12, and V15. RESULTS: A total of 225 Gamma Knife® treatments were included in this retrospective analysis...
October 11, 2017: Stereotactic and Functional Neurosurgery
https://www.readbyqxmd.com/read/28994665/combining-deep-learning-with-anatomy-analysis-for-segmentation-of-portal-vein-for-liver-sbrt-planning
#13
Bulat Ibragimov, Diego Toesca, Daniel Chang, Albert Koong, Lei Xing
Automated segmentation of portal vein (PV) for liver radiotherapy planning is a challenging task due to potentially low vasculature contrast, complex PV anatomy and image artifacts originated from fiducial markers and vasculature stents. In this paper, we propose a novel framework for automated PV segmentation from computed tomography (CT) images. We apply convolutional neural networks (CNN) to learn consistent appearance patterns of PV using a training set of CT images with reference annotations and then enhance PV in previously unseen CT images...
October 10, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28994459/neural-network-dose-models-for-knowledge-based-planning-in-pancreatic-sbrt
#14
Warren G Campbell, Moyed Miften, Lindsey Olsen, Priscilla Stumpf, Tracey Schefter, Karyn A Goodman, Bernard L Jones
PURPOSE: Stereotactic body radiation therapy (SBRT) for pancreatic cancer requires a skillful approach to deliver ablative doses to the tumor while limiting dose to the highly sensitive duodenum, stomach, and small bowel. Here, we develop knowledge-based artificial neural network dose models (ANN-DMs) to predict dose distributions that would be approved by experienced physicians. METHODS: Arc-based SBRT treatment plans for 43 pancreatic cancer patients were planned, delivering 30-33 Gy in five fractions...
October 10, 2017: Medical Physics
https://www.readbyqxmd.com/read/28980836/11c-choline-pet-guided-stereotactic-body-radiation-therapy-for-lymph-node-metastases-in-oligometastatic-prostate-cancer
#15
Ciro Franzese, Egesta Lopci, Lucia Di Brina, Giuseppe Roberto D'Agostino, Pierina Navarria, Pietro Mancosu, Stefano Tomatis, Arturo Chiti, Marta Scorsetti
INTRODUCTION: aim is outcome of 11C-Choline-PET guided SBRT on lymph node metastases. MATERIALS AND METHODS: patients with 1 - 4 lymph node metastases detected by 11C-choline-PET were treated with SBRT. Toxicity, treated metastases control and Progression Free Survival were computed. RESULTS: twenty-six patients, 38 lymph node metastases were irradiated. No grade ≥ 2 toxicity. Median PSA-nadir after RT was 1.02 ng/mL. Post-treatment 11C-Choline-PET showed metabolic complete response in 17 metastases (44,7%), partial response in 9 metastases (38%)...
October 5, 2017: Cancer Investigation
https://www.readbyqxmd.com/read/28975831/stereotactic-body-radiation-therapy-for-hepatocellular-carcinoma-and-intrahepatic-cholangiocarcinoma
#16
Puja S Venkat, Sarah E Hoffe, Jessica M Frakes
The role of external beam radiation therapy for primary liver malignancies has historically been limited due to the risk of radiation-induced liver disease. However, with the advent of stereotactic body radiotherapy (SBRT), we are able to dose escalate while safely sparing critical nearby structures. This review explores the evidence surrounding the use of SBRT for the treatment of primary liver malignancies. A review of the literature was performed. This article discusses the challenges, efficacy, and safety of SBRT for primary liver malignancies in order to conceptualize its role within a multidisciplinary framework...
July 2017: Cancer Control: Journal of the Moffitt Cancer Center
https://www.readbyqxmd.com/read/28975081/radiotherapy-for-oligometastatic-lung-cancer
#17
REVIEW
Derek P Bergsma, Joseph K Salama, Deepinder P Singh, Steven J Chmura, Michael T Milano
Non-small cell lung cancer (NSCLC) typically presents at an advanced stage, which is often felt to be incurable, and such patients are usually treated with a palliative approach. Accumulating retrospective and prospective clinical evidence, including a recently completed randomized trial, support the existence of an oligometastatic disease state wherein select individuals with advanced NSCLC may experience historically unprecedented prolonged survival with aggressive local treatments, consisting of radiotherapy and/or surgery, to limited sites of metastatic disease...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28974858/volumetric-modulated-arc-therapy-lung-stereotactic-body-radiation-therapy-dosimetric-quality-assurance-a-comparison-between-radiochromic-film-and-chamber-array
#18
Juan Fernando Mata Colodro, Alfredo Serna Berná, Vicente Puchades Puchades, David Ramos Amores, Miguel Alcaraz Baños
INTRODUCTION: The aim of this work is to verify the use of radiochromic film in the quality assurance (QA) of volumetric-modulated arc therapy (VMAT) lung stereotactic body radiation therapy (SBRT) plans and compare the results with those obtained using an ion chamber array. MATERIALS AND METHODS: QA was performed for 14 plans using a two-dimensional-array seven29 and EBT3 film. Dose values per session ranged between 7.5 Gy and 18 Gy. The multichannel method was used to obtain a dose map for film...
July 2017: Journal of Medical Physics
https://www.readbyqxmd.com/read/28974415/hypofractionated-stereotactic-radiation-therapy-to-the-resection-bed-for-intracranial-metastases
#19
Audrey Keller, Mélanie Doré, Hélène Cebula, François Thillays, François Proust, Ioana Darié, Stéphane-André Martin, Gregory Delpon, François Lefebvre, Georges Noël, Delphine Antoni
PURPOSE: To retrospectively report the outcomes of a large multicenter cohort of patients treated with surgery and hypofractionated stereotactic radiation therapy (HFSRT) to the resection cavities of brain metastases (BMs). METHODS AND MATERIALS: Between March 2008 and February 2015, 181 patients with no prior whole-brain radiation therapy (WBRT) were treated by HFSRT to the surgical bed of BM at the dose of 33 Gy (3 × 11 Gy). The primary endpoint was local control...
August 19, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28973432/staged-stereotactic-radiosurgery-for-large-brain-metastases-local-control-and-clinical-outcomes-of-a-one-two-punch-technique
#20
Ammoren Dohm, Emory R McTyre, Catherine Okoukoni, Adrianna Henson, Christina K Cramer, Michael C LeCompte, Jimmy Ruiz, Michael T Munley, Shadi Qasem, Hui-Wen Lo, Fei Xing, Kounosuke Watabe, Adrian W Laxton, Stephen B Tatter, Michael D Chan
BACKGROUND: Treatment options are limited for large, unresectable brain metastases. OBJECTIVE: To report a single institution series of staged stereotactic radiosurgery (SRS) that allows for tumor response between treatments in order to optimize the therapeutic ratio. METHODS: Patients were treated with staged SRS separated by 1 mo with a median dose at first SRS of 15 Gy (range 10-21 Gy) and a median dose at second SRS of 14 Gy (range 10-18 Gy)...
July 7, 2017: Neurosurgery
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