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https://www.readbyqxmd.com/read/28447170/surgery-or-stereotactic-body-radiotherapy-for-elderly-stage-i-lung-cancer-a-propensity-score-matching-analysis
#1
Takuro Miyazaki, Takuya Yamazaki, Daisuke Nakamura, Shuntaro Sato, Naoya Yamasaki, Tomoshi Tsuchiya, Keitaro Matsumoto, Ryotaro Kamohara, Go Hatachi, Takeshi Nagayasu
PURPOSE: The aim of this study was to compare the outcomes of surgery and stereotactic body radiotherapy (SBRT) for elderly clinical stage I non-small cell lung cancer (NSCLC) patients. METHODS: Patients ≥80 years of age with clinical stage I NSCLC between August 2008 and December 2014 were treated either surgery or SBRT. Propensity score matching was performed to reduce bias in various clinicopathological factors. RESULTS: Surgery was performed in 57 cases and SBRT in 41 cases...
April 26, 2017: Surgery Today
https://www.readbyqxmd.com/read/28437679/nodal-recurrence-after-stereotactic-body-radiotherapy-for-early-stage-non-small-cell-lung-cancer-incidence-and-proposed-risk-factors
#2
REVIEW
Krista C J Wink, Angela van Baardwijk, Esther G C Troost, Dirk De Ruysscher
Stereotactic body radiotherapy (SBRT) is an alternative to surgery for patients with early stage non-small cell lung cancer (NSCLC) who are inoperable due to comorbid disease or who refuse surgery. SBRT results in an excellent local control rate of more than 90%, which is comparable to surgery, while short and long-term overall toxicity is low. Surgically treated patients are often more extensively staged pre-operatively, e.g. with endobronchial ultrasound and/or mediastinoscopy, and typically undergo intra-operative lymph node dissection or sampling...
April 12, 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28433508/organs-at-risk-in-lung-sbrt
#3
REVIEW
F De Rose, D Franceschini, G Reggiori, A Stravato, P Navarria, A M Ascolese, S Tomatis, P Mancosu, M Scorsetti
Lung stereotactic body radiotherapy (SBRT) is an accurate and precise technique to treat lung tumors with high 'ablative' doses. Given the encouraging data in terms of local control and toxicity profile, SBRT has currently become a treatment option for both early stage lung cancer and lung oligometastatic disease in patients who are medically inoperable or refuse surgical resection. Dose-adapted fractionation schedules and ongoing prospective trials should provide further evidence of SBRT safety trying to reduce toxicities and complications...
April 19, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28433482/variations-of-target-volume-definition-and-daily-target-volume-localization-in-stereotactic-body-radiotherapy-for-early-stage-non-small-cell-lung-cancer-patients-under-abdominal-compression
#4
Chunhui Han, Sagus Sampath, Timothy E Schultheisss, Jeffrey Y C Wong
We aimed to compare gross tumor volumes (GTV) in 3-dimensional computed tomography (3DCT) simulation and daily cone beam CT (CBCT) with the internal target volume (ITV) in 4-dimensional CT (4DCT) simulation in stereotactic body radiotherapy (SBRT) treatment of patients with early-stage non-small cell lung cancer (NSCLC) under abdominal compression. We retrospectively selected 10 patients with NSCLC who received image-guided SBRT treatments under abdominal compression with daily CBCT imaging. GTVs were contoured as visible gross tumor on the planning 3DCT and daily CBCT, and ITVs were contoured using maximum intensity projection (MIP) images of the planning 4DCT...
April 19, 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28429140/a-phase-i-ii-study-on-stereotactic-body-radiotherapy-with-real-time-tumor-tracking-using-cyberknife-based-on-the-monte-carlo-algorithm-for-lung-tumors
#5
Hiromitsu Iwata, Satoshi Ishikura, Taro Murai, Michio Iwabuchi, Mitsuhiro Inoue, Koshi Tatewaki, Seiji Ohta, Naoki Yokota, Yuta Shibamoto
BACKGROUND: In this phase I/II study, we assessed the safety and initial efficacy of stereotactic body radiotherapy (SBRT) for lung tumors with real-time tumor tracking using CyberKnife based on the Monte Carlo algorithm. METHODS: Study subjects had histologically confirmed primary non-small-cell lung cancer staged as T1a-T2aN0M0 and pulmonary oligometastasis. The primary endpoint was the incidence of Grade ≥3 radiation pneumonitis (RP) within 180 days of the start of SBRT...
April 20, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28424839/reirradiation-of-recurrent-node-positive-non-small-cell-lung-cancer-after-previous-stereotactic-radiotherapy-for-stage%C3%A2-i-disease-a%C3%A2-multi-institutional-treatment-recommendation
#6
Carsten Nieder, Dirk De Ruysscher, Laurie E Gaspar, Matthias Guckenberger, Minesh P Mehta, Patrick Cheung, Arjun Sahgal
BACKGROUND: Practice guidelines have been developed for early-stage and locally advanced non-small cell lung cancer (NSCLC). However, many common clinical scenarios still require individualized decision making. This is true for locoregional relapse after initial stereotactic radiotherapy (stereotactic body radiation therapy or stereotactic ablative radiotherapy; SBRT or SABR), an increasingly utilized curative treatment option for stage I NSCLC. METHODS: A consortium of expert radiation oncologists was established with the aim of providing treatment recommendations...
April 19, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28421482/cost-effectiveness-of-stereotactic-radiosurgery-and-stereotactic-body-radiation-therapy-a-critical-review
#7
REVIEW
Nataniel H Lester-Coll, David J Sher
PURPOSE OF REVIEW: This review aims to summarize and appraise published cost-effectiveness studies on stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT). RECENT FINDINGS: We performed a Medline search of cost-effectiveness studies of SRS, SBRT, and other cancer treatment modalities such as surgery and systemic therapy from 2006 to 2016. We included studies that used both modeling and retrospective review techniques. We excluded studies of benign disease...
June 2017: Current Oncology Reports
https://www.readbyqxmd.com/read/28415581/tumor-physiological-changes-during-hypofractionated-stereotactic-body-radiation-therapy-assessed-using-multi-parametric-magnetic-resonance-imaging
#8
Heling Zhou, Zhang Zhang, Rebecca Denney, Jessica S Williams, Jeni Gerberich, Strahinja Stojadinovic, Debabrata Saha, John M Shelton, Ralph P Mason
Radiation therapy is a primary treatment for non-resectable lung cancer and hypoxia is thought to influence tumor response. Hypoxia is expected to be particularly relevant to the evolving new radiation treatment scheme of hypofractionated stereotactic body radiation therapy (SBRT). As such, we sought to develop non-invasive tools to assess tumor pathophysiology and response to irradiation. We applied blood oxygen level dependent (BOLD) and tissue oxygen level dependent (TOLD) MRI, together with dynamic contrast enhanced (DCE) MRI to explore the longitudinal effects of SBRT on tumor oxygenation and vascular perfusion using A549 human lung cancer xenografts in a subcutaneous rat model...
March 21, 2017: Oncotarget
https://www.readbyqxmd.com/read/28412751/poly-adp-ribose-polymerase-inhibitor-an-effective-radiosensitizer-in-lung-and-pancreatic-cancers
#9
Kedar Hastak, Steven Bhutra, Renate Parry, James M Ford
The development of stereotactic body radiation therapy (SBRT) has revolutionized radiation therapy for lung cancers and is an emerging treatment option for pancreatic cancers. However, there are many questions on how to optimize its use in chemoradiotherapy. The most relevant addition to radiotherapy regimens are inhibitors of DNA repair and DNA damage response pathways. One such class of agents are inhibitors of poly (ADP-ribose) polymerase (PARP). In this study we examined the effects of the PARP inhibitor LT626 in combination with ionizing radiation in lung and pancreatic cancers...
February 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28408183/outcomes-of-stereotactic-body-radiotherapy-for-t1-t2n0-small-cell-carcinoma-according-to-addition-of-chemotherapy-and-prophylactic-cranial-irradiation-a-multicenter-analysis
#10
Vivek Verma, Charles B Simone, Pamela K Allen, Steven H Lin
BACKGROUND: Although T1-T2N0 non-small cell lung cancer can be managed with stereotactic body radiotherapy (SBRT) alone, this management has often been extrapolated to T1-T2N0 small cell lung cancer (SCLC). This secondary analysis of a multi-institutional cohort study investigated whether the addition of chemotherapy and prophylactic cranial irradiation (PCI) improved the outcomes for these patients. MATERIALS AND METHODS: All cases of histologically confirmed T1-T2N0M0 SCLC were obtained from 24 institutions' prospectively collected SBRT databases...
March 16, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/28408078/adoption-of-radiation-technology-among-privately-insured-nonelderly-patients-with-cancer-in-the-united-states-2008-to-2014-a-claims-based-analysis
#11
Hubert Y Pan, Jing Jiang, Ya-Chen Tina Shih, Benjamin D Smith
Despite enthusiasm for advanced radiation technologies, understanding of their adoption in recent years is limited. The aim of this study was to elucidate utilization trends of conventional radiation, intensity-modulated radiotherapy (IMRT), brachytherapy, proton radiotherapy, stereotactic body radiotherapy (SBRT), and stereotactic radiosurgery (SRS) using a large convenience sample of irradiated patients with cancer identified from private insurance claims in the United States. The unit of analysis was a claim corresponding to a fraction of delivered radiotherapy from 2008 to 2014...
April 10, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28391958/the-role-of-dosimetry-audit-in-lung-sbrt-multi-centre-clinical-trials
#12
Catharine H Clark, Coen W Hurkmans, Stephen F Kry
Stereotactic Body Radiotherapy (SBRT) in the lung is a challenging technique which requires high quality clinical trials to answer the un-resolved clinical questions. Quality assurance of these clinical trials not only ensures the safety of the treatment of the participating patients but also minimises the variation in treatment, thus allowing the lowest number of patient treatments to answer the trial question. This review addresses the role of dosimetry audits in the quality assurance process and considers what can be done to ensure the highest accuracy of dose calculation and delivery and it's assessment in multi-centre trials...
April 5, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28388257/accuracy-of-the-dose-shift-approximation-in-estimating-the-delivered-dose-in-sbrt-of-lung-tumors-considering-setup-errors-and-breathing-motions
#13
Kristin Karlsson, Ingmar Lax, Elias Lindbäck, Gavin Poludniowski
INTRODUCTION: Geometrical uncertainties can result in a delivered dose to the tumor different from that estimated in the static treatment plan. The purpose of this project was to investigate the accuracy of the dose calculated to the clinical target volume (CTV) with the dose-shift approximation, in stereotactic body radiation therapy (SBRT) of lung tumors considering setup errors and breathing motion. The dose-shift method was compared with a beam-shift method with dose recalculation...
April 7, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28383157/development-of-a-novel-low-radiation-absorbent-lok-bar-to-reduce-x-ray-scattering-and-absorption-in-rapidarc-%C3%A2-treatment-planning-and-dose-delivery
#14
Hajime Monzen, Kazuki Kubo, Mikoto Tamura, Masaru Hayakawa, Yasumasa Nishimura
We developed a novel low-radiation-absorbent lok-bar (HM-bar) that is used to secure the immobilizers to the couch. The aim of this study was to investigate the X-ray scattering and absorption properties of the HM-bar in computed tomography (CT) simulation and radiotherapy dose delivery using the Varian Exact™ lok-bar (VL-bar) as a benchmark. CT images were obtained with or without lok-bar, and then each image was visually evaluated for artifacts. The attenuation rates for each lok-bar were measured using a farmer-type ionization chamber (PTW30013) and the I'mRT phantom (IBA Dosimetry GmbH)...
April 6, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28373068/stereotactic-body-radiotherapy-for-early-stage-non-small-cell-lung-cancer-in-patients-80-years-and-older-a-multi-center-analysis
#15
Richard J Cassidy, Pretesh R Patel, Xinyan Zhang, Robert H Press, Jeffrey M Switchenko, Rathi N Pillai, Taofeek K Owonikoko, Suresh S Ramalingam, Felix G Fernandez, Seth D Force, Walter J Curran, Kristin A Higgins
BACKGROUND: Stereotactic body radiotherapy (SBRT) is the standard of care for medically inoperable early-stage non-small-cell lung cancer. Despite the limited number of octogenarians and nonagenarians on trials of SBRT, its use is increasingly being offered in these patients, given the aging cancer population, medical fragility, or patient preference. Our purpose was to investigate the efficacy, safety, and survival of patients ≥ 80 years old treated with definitive lung SBRT. METHODS: Patients who underwent SBRT were reviewed from 2009 to 2015 at 4 academic centers...
March 16, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/28366554/comparative-study-of-the-calculated-risk-of-radiation-induced-cancer-after-photon-and-proton-beam-based-radiosurgery-of-liver-metastases
#16
Gracinda Mondlane, Michael Gubanski, Pehr A Lind, Ana Ureba, Albert Siegbahn
INTRODUCTION: The potential of proton therapy to improve the sparing of the healthy tissue has been demonstrated in several studies. However, even small doses delivered to the organs at risk (OAR) may induce long-term detriments after radiotherapy. In this study, we investigated the possibility to reduce the risk of radiation-induced secondary cancers with intensity modulated proton therapy (IMPT), when used for radiosurgery of liver metastases. MATERIAL AND METHODS: Ten patients, previously treated for liver metastases with photon-beam based stereotactic body radiation therapy (SBRT) were retrospectively planned for radiosurgery with IMPT...
March 30, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28363484/radiobiological-parameters-of-liver-and-lung-metastases-derived-from-tumor-control-data-of-3719-metastases
#17
Rainer J Klement
BACKGROUND AND PURPOSE: The radiobiological parameters for liver and lung metastases treated with stereotactic body radiation therapy (SBRT) are poorly defined. This project aimed at estimating these parameters from published tumor control probability (TCP) data, and separately for metastases with colorectal cancer (CRC) and non-CRC histology. MATERIALS AND METHODS: A total of 62 studies with 89 different treatment prescriptions for a total of 3719 metastases were analyzed in a Bayesian framework using four different radiobiological models: The LQ, mLQ, LQ-L and the regrowth model which accounts for tumor regrowth after SBRT...
March 28, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28338470/reducing-scan-angle-using-adaptive-prior-knowledge-for-a-limited-angle-intrafraction-verification-live-system-for-conformal-arc-radiotherapy
#18
Yawei Zhang, Fang-Fang Yin, You Zhang, Lei Ren
PURPOSE: To develop an adaptive prior knowledge guided image estimation technique to reduce the scan angle needed in the Limited-Angle Intrafraction Verification (LIVE) system for 4D-CBCT reconstruction. METHOD: The LIVE system has been previously developed to reconstruct 4D volumetric images on-the-fly during arc treatment for intrafraction target verification and dose calculation. In this study, we developed an adaptive constrained free-form deformation reconstruction technique in LIVE to further reduce the scanning angle needed to reconstruct the 4D-CBCT images for faster intrafraction verification...
March 24, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28331819/clinical-outcomes-of-cyberknife-stereotactic-radiosurgery-for-elderly-patients-with-presumed-primary-stage-i-lung-cancer
#19
Zhen Wang, Ao-Mei Li, Jie Gao, Jing Li, Bing Li, Percy Lee, Charles B Simone, Yong Song, Xi-Xu Zhu
BACKGROUND: In certain situations, especially in the elderly patient population, a tissue diagnosis of a suspected pulmonary neoplasm is not feasible. Often, a definitive treatment such as stereotactic body radiosurgery is recommended, rather than active surveillance. The aim of this study is to evaluate the efficacy and tolerability of stereotactic body radiotherapy (SBRT) for elderly patients with presumed primary stage I lung cancer without pathological tissue confirmation. METHODS: We performed a retrospective analysis of 25 elderly patients (≥75 years) with presumed primary stage I lung cancer treated with SBRT from 2009-2015...
February 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28325266/stage-i-small-cell-lung-cancer-a-new-potential-option-for-stereotactic-ablative-radiation-therapy-a-review-of-literature
#20
REVIEW
Filippo Alongi, Stefano Arcangeli, Berardino De Bari, Niccolò Giaj-Levra, Alba Fiorentino, Rosario Mazzola, Marco Trovò
Small cell lung cancer (SCLC) is relative rare histology in lung cancer patients. The standard treatment, in patients with an intra-thoracic disease, is represented by the use of concurrent chemo-radiotherapy; while patients with early SCLC stage, surgical resection could be recommended. Stereotactic body radiotherapy (SBRT) is a recently introduced technique allowing the delivery of very high radiation doses to limited target volumes and it is considered the standard approach in the treatment of not operable stage I Non Small-Cell Lung Cancer (NSCLC)...
April 2017: Critical Reviews in Oncology/hematology
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