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Lung SBRT

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https://www.readbyqxmd.com/read/29128934/radiobiological-analysis-of-stereotactic-body-radiation-therapy-for-an-evidence-based-planning-target-volume-of-the-lung-using-multiphase-ct-images-obtained-with-a-pneumatic-abdominal-compression-apparatus-a-case-study
#1
Arun Chairmadurai, Harish Chandra Goel, Sandeep Kumar Jain, Pawan Kumar
This study evaluated the efficiency of stereotactic body radiation therapy of lung (SBRT-Lung) in generating a treatment volume using conventional multiple-phase three-dimensional computed tomography (3D-CT) of a patient immobilized with pneumatic abdominal compression. The institutional protocol for SBRT-Lung using the RapidArc technique relied on a planning target volume (PTV) delineated using 3D-CT and accounted for linear and angular displacement of the tumor during respiratory movements. The efficiency of the institutional protocol was compared with that of a conventional method for PTV delineation based on radiobiological estimates, such as tumor control probability (TCP) and normal tissue complication probability (NTCP), evaluated using dose-volume parameters...
November 11, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/29121047/dosimetric-comparison-of-ct-guided-iodine-125-seed-stereotactic-brachytherapy-and-stereotactic-body-radiation-therapy-in-the-treatment-of-nsclc
#2
Ranran Li, Ying Zhang, Yuan Yuan, Qi Lin, Jianjian Dai, Ruicai Xu, Xudong Hu, Mingyong Han
This study aimed to assess the dosimetric differences between iodine-125 seed stereotactic brachytherapy (SBT) and stereotactic body radiation therapy (SBRT) in the treatment of non-small cell lung cancer (NSCLC). An SBT plan and an SBRT plan were generated for eleven patients with T1-2 NSCLC. Prescription of the dose and fractionation (fr) for SBRT was 48Gy/4fr. The planning aim for SBT was D90 (dose delivered to 90% of the target volume)≥120Gy. Student's paired t test was used to compare the dosimetric parameters...
2017: PloS One
https://www.readbyqxmd.com/read/29106810/stereotactic-body-radiotherapy-for-early-stage-non-small-cell-lung-cancer-american-society-of-clinical-oncology-endorsement-of-the-american-society-for-radiation-oncology-evidence-based-guideline
#3
Bryan J Schneider, Megan E Daly, Erin B Kennedy, Mara B Antonoff, Stephen Broderick, Jill Feldman, Shruti Jolly, Bryan Meyers, Gaetano Rocco, Chad Rusthoven, Ben J Slotman, Daniel H Sterman, Brendon M Stiles
Purpose The American Society for Radiation Oncology (ASTRO) produced an evidence-based guideline on treatment with stereotactic body radiotherapy (SBRT) for patients with early-stage non-small-cell lung cancer. ASCO has a policy and set of procedures for endorsing and/or adapting clinical practice guidelines that have been developed by other professional organizations. Methods The ASTRO Evidence-Based Guideline for Stereotactic Body Radiotherapy for Early-Stage Non-Small-Cell Lung Cancer was reviewed for developmental rigor by methodologists...
November 6, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/29100548/an-investigation-into-the-range-dependence-of-target-delineation-strategies-for-stereotactic-lung-radiotherapy
#4
Dennis J Mohatt, John M Keim, Mathew C Greene, Ami Patel-Yadav, Jorge A Gomez, Harish K Malhotra
BACKGROUND: The "gold standard" approach for defining an internal target volume (ITV) is using 10 gross tumor volume (GTV) phases delineated over the course of one respiratory cycle. However, different sites have adopted several alternative techniques which compress all temporal information into one CT image set to optimize work flow efficiency. The purpose of this study is to evaluate alternative target segmentation strategies with respect to the 10 phase gold standard. METHODS: A Quasar respiratory motion phantom was employed to simulate lung tumor movement...
November 3, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/29066121/patterns-of-intraosseous-recurrence-after-stereotactic-body-radiation-therapy-for-coxal-bone-metastasis
#5
Kei Ito, Takuya Shimizuguchi, Keiji Nihei, Tomohisa Furuya, Hiroaki Ogawa, Hiroshi Tanaka, Keisuke Sasai, Katsuyuki Karasawa
PURPOSE: To analyze the detailed pattern of intraosseous failure after stereotactic body radiation therapy (SBRT) for coxal bone metastasis. METHODS AND MATERIALS: Patients treated with SBRT to coxal bone metastasis were identified by retrospective chart review. The SBRT doses were 30 Gy or 35 Gy in 5 fractions. A margin of 5 to 10 mm was added to the gross tumor volume to create the clinical target volume. We evaluated the presence or absence of intraosseous recurrence using magnetic resonance imaging...
September 5, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/29066051/impact-of-pretreatment-interstitial-lung-disease-on-radiation-pneumonitis-and-survival-in-patients-treated-with-lung-stereotactic-body-radiation-therapy-sbrt
#6
Daniel Glick, Stephen Lyen, Sonja Kandel, Shane Shapera, Lisa W Le, Patricia Lindsay, Olive Wong, Andrea Bezjak, Anthony Brade, B C John Cho, Andrew Hope, Alexander Sun, Meredith Giuliani
INTRODUCTION: The purpose of this study was to determine the impact of interstitial lung disease (ILD) on radiation pneumonitis (RP) and overall survival (OS) in lung stereotactic body radiation therapy (SBRT). METHODS: Patients treated with lung SBRT from 2004 to 2015 were included. Pretreatment computed tomography scans were reviewed and classified for interstitial changes by thoracic radiologists using American Thoracic Society guidelines and Washko and Kazerooni scores...
July 10, 2017: Clinical Lung Cancer
https://www.readbyqxmd.com/read/29064573/effects-of-magnetic-field-orientation-and-strength-on-the-treatment-planning-of-non-small-cell-lung-cancer
#7
Schrenk Oliver, Spindeldreier Claudia Katharina, Burigo Lucas Norberto, Hoerner-Rieber Juliane, Pfaffenberger Asja
PURPOSE: Magnetic resonance image-guided radiotherapy (MRgRT) has the potential to increase the accuracy of radiation treatment delivery. Several research groups have developed hybrid MRgRT devices differing by radiation source used, magnetic field orientation and strength. In this work, we investigate the impact of different magnetic field orientations and strengths on the treatment planning of non-small cell lung cancer patients (NSCLC). METHODS: A framework using the in-house developed treatment planning system matRad and the EGSnrc Monte Carlo code system was introduced to perform Monte Carlo based treatment planning in the presence of a magnetic field...
October 24, 2017: Medical Physics
https://www.readbyqxmd.com/read/29059054/correspondence-model-based-4d-vmat-dose-simulation-for-analysis-of-local-metastasis-recurrence-after-extracranial-sbrt
#8
Thilo Sothmann, Tobias Gauer, Matthias Wilms, René Werner
The purpose of this study is to introduce a novel approach to incorporate patient-specific breathing variability information into 4D dose simulation of volumetric arc therapy (VMAT)-based stereotactic body radiotherapy (SBRT) of extracranial metastases. Feasibility of the approach is illustrated by application to treatment planning and motion data of lung and liver metastasis patients. The novel 4D dose simulation approach makes use of a regression-based correspondence model that allows representing patient motion variability by breathing signal-steered interpolation and extrapolation of deformable image registration motion fields...
October 23, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/29052514/five-fraction-sbrt-for-ultra-central-nsclc-in-field-recurrences-following-high-dose-conventional-radiation
#9
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/29036692/clinical-utility-of-texture-analysis-of-18f-fdg-pet-ct-in-patients-with-stage-i-lung-cancer-treated-with-stereotactic-body-radiotherapy
#10
Kazuya Takeda, Kentaro Takanami, Yuko Shirata, Takaya Yamamoto, Noriyoshi Takahashi, Kengo Ito, Kei Takase, Keiichi Jingu
We evaluated the reproducibility and predictive value of texture parameters and existing parameters of 18F-FDG PET/CT images in Stage I non-small-cell lung cancer (NSCLC) patients treated with stereotactic body radiotherapy (SBRT). Twenty-six patients with Stage I NSCLC (T1-2N0M0) were retrospectively analyzed. All of the patients underwent an 18F-FDG PET/CT scan before treatment and were treated with SBRT. Each tumor was delineated using PET Edge (MIM Software Inc., Cleveland, OH), and texture parameters were calculated using open-source code CGITA...
September 21, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28992962/the-long-and-short-term-variability-of-breathing-induced-tumor-motion-in-lung-and-liver-over-the-course-of-a-radiotherapy-treatment
#11
Jennifer Dhont, Jef Vandemeulebroucke, Manuela Burghelea, Kenneth Poels, Tom Depuydt, Robbe Van Den Begin, Cyril Jaudet, Christine Collen, Benedikt Engels, Truus Reynders, Marlies Boussaer, Thierry Gevaert, Mark De Ridder, Dirk Verellen
PURPOSE: To evaluate the short and long-term variability of breathing induced tumor motion. MATERIALS AND METHODS: 3D tumor motion of 19 lung and 18 liver lesions captured over the course of an SBRT treatment were evaluated and compared to the motion on 4D-CT. An implanted fiducial could be used for unambiguous motion information. Fast orthogonal fluoroscopy (FF) sequences, included in the treatment workflow, were used to evaluate motion during treatment. Several motion parameters were compared between different FF sequences from the same fraction to evaluate the intrafraction variability...
October 6, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28985095/a-propensity-matched-analysis-of-outcomes-of-patients-with-clinical-stage-i-non-small-cell-lung-cancer-treated-surgically-or-with-stereotactic-radiotherapy-a-meta-analysis
#12
Shi-Wang Wen, Li Han, Hui-Lai Lv, Yan-Zhao Xu, Zhen-Hua Li, Ming-Bo Wang, Yong-Gang Zhu, Peng Su, Zi-Qiang Tian, Yue-Feng Zhang
OBJECTIVE: The aim of this study was to compare the efficacy between SBRT and surgery based on the Propensity-Matched Analysis. METHODS: Publications on comparison SBRT and Surgery for early stage non- small cell lung cancer (NSCLC) from 2011 to 2017 were collected. Propensity score matching was used to achieve comparable treatment hazard ratios of the overall survival (OS), local control survival (LC), regional control survival (RC), loco-regional control survival (LRC), distant control survival (DC), disease-free survival (DFS), and progression-free survival (PFS) between SBRT and Surgery...
October 6, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28975083/parenchymal-and-functional-lung-changes-after-stereotactic-body-radiotherapy-for-early-stage-non-small-cell-lung-cancer-experiences-from-a-single-institution
#13
Juliane Hörner-Rieber, Julian Dern, Denise Bernhardt, Laila König, Sebastian Adeberg, Vivek Verma, Angela Paul, Jutta Kappes, Hans Hoffmann, Juergen Debus, Claus P Heussel, Stefan Rieken
INTRODUCTION: This study aimed to evaluate parenchymal and functional lung changes following stereotactic body radiotherapy (SBRT) for early-stage non-small cell lung cancer (NSCLC) patients and to correlate radiological and functional findings with patient and treatment characteristics as well as survival. MATERIALS AND METHODS: Seventy patients with early-stage NSCLC treated with SBRT from 2004 to 2015 with more than 1 year of CT follow-up scans were analyzed...
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
#14
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/28958106/-stereotactic-body-radiotherapy-for-early-stage-nsclc-what-is-the-evidence
#15
Matthias Guckenberger
Stereotactic body radiotherapy (SBRT) was first described in the mid 90s as a technique using high precision radiotherapy to deliver escalated, ablative irradiation doses and which simultaneously minimised incidental irradiation of healthy tissue. Technological and clinical development of this technique has been pioneered in the field of early stage non-small cell lung cancer, where improved local tumor control led to prolonged overall survival. Today, SBRT is the evidence-based and guideline-recommended treatment of choice for early stage NSCLC in patients who are medically inoperable...
September 2017: Zentralblatt Für Chirurgie
https://www.readbyqxmd.com/read/28951090/improved-survival-of-stage-i-non-small-cell-lung-cancer-a-va-central-cancer-registry-analysis
#16
Matthew J Boyer, Christina D Williams, David H Harpole, Mark W Onaitis, Michael J Kelley, Joseph K Salama
INTRODUCTION: The combined impact of advances in diagnosis and treatment of stage I NSCLC has not been assessed comprehensively. To define the survival impact of modern staging and treatment techniques for clinical stage I NSCLC, the Veterans Administration Central Cancer Registry, a database of U.S. veterans in whom the disease was diagnosed in the Veteran's Health Administration, was queried. From this database, patients who had stage I NSCLC diagnosed from 2001 to 2010 and were treated with either surgery or radiation were identified...
September 23, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28947188/deformable-image-registration-applied-to-lung-sbrt-usefulness-and-limitations
#17
REVIEW
David Sarrut, Thomas Baudier, Myriam Ayadi, Ronan Tanguy, Simon Rit
Radiation therapy (RT) of the lung requires deformation analysis. Deformable image registration (DIR) is the fundamental method to quantify deformations for various applications: motion compensation, contour propagation, dose accumulation, etc. DIR is therefore unavoidable in lung RT. DIR algorithms have been studied for decades and are now available both within commercial and academic packages. However, they are complex and have limitations that every user must be aware of before clinical implementation. In this paper, the main applications of DIR for lung RT with their associated uncertainties and their limitations are reviewed...
September 22, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28946909/ct-imaging-features-associated-with-recurrence-in-non-small-cell-lung-cancer-patients-after-stereotactic-body-radiotherapy
#18
Qian Li, Jongphil Kim, Yoganand Balagurunathan, Jin Qi, Ying Liu, Kujtim Latifi, Eduardo G Moros, Matthew B Schabath, Zhaoxiang Ye, Robert J Gillies, Thomas J Dilling
BACKGROUND: Predicting recurrence after stereotactic body radiotherapy (SBRT) in non-small cell lung cancer (NSCLC) patients is problematic, but critical for the decision of following treatment. This study aims to investigate the association of imaging features derived from the first follow-up computed tomography (CT) on lung cancer patient outcomes following SBRT, and identify patients at high risk of recurrence. METHODS: Fifty nine biopsy-proven non-small cell lung cancer patients were qualified for this study...
September 25, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28943046/radical-radiation-therapy-for-oligometastatic-breast-cancer-results-of-a-prospective-phase-ii-trial
#19
Marco Trovo, Carlo Furlan, Jerry Polesel, Francesco Fiorica, Stefano Arcangeli, Niccolò Giaj-Levra, Filippo Alongi, Alessandro Del Conte, Loredana Militello, Elena Muraro, Debora Martorelli, Simon Spazzapan, Massimiliano Berretta
BACKGROUND AND PURPOSE: We conducted a prospective phase II multicentric trial to determine if radical radiation therapy to all metastatic sites might improve the progression-free survival (PFS) in oligometastatic breast cancer patients. Secondary endpoints were local control (LC), overall survival (OS) and toxicity. METHODS AND MATERIALS: Inclusion criteria were the following: oligometastatic breast cancer with ≤5 metastatic sites, FDG-PET/CT staging, no brain metastases, primary tumor controlled...
September 21, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28941961/survival-impact-of-cardiac-dose-following-lung-stereotactic-body-radiotherapy
#20
Olive Y Wong, Vivian Yau, Julie Kang, Daniel Glick, Patricia Lindsay, Lisa W Le, Alexander Sun, Andrea Bezjak, B C John Cho, Andrew Hope, Meredith Giuliani
INTRODUCTION: The purpose of this study was to determine the impact of radiation dose to substructures of the heart in lung stereotactic body radiotherapy (SBRT) patients on non-cancer-related deaths. METHODS: Patients treated with lung SBRT at a single institution from 2005 to 2013 were included. The heart and its substructures were contoured, and dose was calculated including mean, max, and max 10 cc dose. Clinical variables including stage, histology, age, gender, Charlson comorbidity index (CCI), preexisting cardiac disease, pulmonary function (forced expiratory volume in 1 second, diffusion capacity), and smoking status were explored for association with non-cancer-related deaths in univariable (UVA) and multivariable (MVA) analyses...
August 31, 2017: Clinical Lung Cancer
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