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https://www.readbyqxmd.com/read/28532606/verifying-tumor-position-during-stereotactic-body-radiation-therapy-delivery-using-limited-arc-cone-beam-computed-tomography-imaging
#1
Colien Hazelaar, Max Dahele, Stefan Scheib, Ben J Slotman, Wilko F A R Verbakel
BACKGROUND AND PURPOSE: Proof of tumor position during stereotactic body radiotherapy (SBRT) delivery is desirable. We investigated if cone-beam CT (CBCT) scans reconstructed from (collimated) fluoroscopic kV images acquired during irradiation could show the dominant tumor position. MATERIALS AND METHODS: Full-arc CBCT scans were reconstructed using FDK filtered back projection from 38kV fluoroscopy datasets (16 patients) continuously acquired during volumetric modulated spine SBRT...
May 19, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28532561/challenging-situations-for-lung-sbrt
#2
EDITORIAL
Daniel Przybysz, Jeffrey D Bradley
No abstract text is available yet for this article.
June 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28530067/-stereotactic-ablative-body-radiation-sabr-a-new-therapeutic-option-for-treatment-of-stage-i-lung-cancer
#3
REVIEW
Sarit Appel, Zvi Symon
Stereotactic ablative radiotherapy (SABR) also known as stereotactic body radiation therapy (SBRT) offers a new therapeutic option for stage 1 lung cancer that cannot undergo surgery due to co-morbidities or patient refusal. This treatment evolved in the last decade thanks to technologic advancement of radiation therapy planning and delivery that allow real time imaging of the tumor and real time position correction before every treatment. Ultra high doses of radiation cause ablation of the target with very low collateral scatter dose to surrounding tissue...
November 2016: Harefuah
https://www.readbyqxmd.com/read/28529896/advances-in-radiotherapy-techniques-and-delivery-for-non-small-cell-lung-cancer-benefits-of-intensity-modulated-radiation-therapy-proton-therapy-and-stereotactic-body-radiation-therapy
#4
REVIEW
Tejan P Diwanji, Pranshu Mohindra, Melissa Vyfhuis, James W Snider, Chaitanya Kalavagunta, Sina Mossahebi, Jen Yu, Steven Feigenberg, Shahed N Badiyan
The 21st century has seen several paradigm shifts in the treatment of non-small cell lung cancer (NSCLC) in early-stage inoperable disease, definitive locally advanced disease, and the postoperative setting. A key driver in improvement of local disease control has been the significant evolution of radiation therapy techniques in the last three decades, allowing for delivery of definitive radiation doses while limiting exposure of normal tissues. For patients with locally-advanced NSCLC, the advent of volumetric imaging techniques has allowed a shift from 2-dimensional approaches to 3-dimensional conformal radiation therapy (3DCRT)...
April 2017: Translational Lung Cancer Research
https://www.readbyqxmd.com/read/28523157/impact-of-maximum-standardized-uptake-value-of-non-small-cell-lung-cancer-on-detecting-lymph-node-involvement-in-potential-stereotactic-body-radiotherapy-candidates
#5
Shanyuan Zhang, Shaolei Li, Yuquan Pei, Miao Huang, Fangliang Lu, Qingfeng Zheng, Nan Li, Yue Yang
BACKGROUND: The retrospective study investigated the association between the maximum standardized uptake value (SUVmax) of primary tumor and lymph node involvement in potential stereotactic body radiotherapy (SBRT) candidates. METHODS: A total of 185 patients with clinical stage I NSCLC were enrolled in the current study. All patients underwent lobectomy with systematic lymph node dissection following preoperative FDG-PET/CT scanning. The association between clinicopathological variables and lymph node involvement was analyzed by univariate and multivariate analysis...
April 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28503898/evaluation-of-initial-setup-errors-of-two-immobilization-devices-for-lung-stereotactic-body-radiation-therapy-sbrt
#6
Yoshihiro Ueda, Teruki Teshima, Higinia Cárdenes, Indra J Das
The aim of this study was to investigate the accuracy and efficacy of two commonly used commercial immobilization systems for stereotactic body radiation therapy (SBRT) in lung cancer. This retrospective study assessed the efficacy and setup accuracy of two immobilization systems: the Elekta Body Frame (EBF) and the Civco Body Pro-Lok (CBP) in 80 patients evenly divided for each system. A cone beam CT (CBCT) was used before each treatment fraction for setup correction in both devices. Analyzed shifts were applied for setup correction and CBCT was repeated...
May 14, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28480871/multi-objective-radiomics-model-for-predicting-distant-failure-in-lung-sbrt
#7
Zhiguo Zhou, Michael Folkert, Puneeth Iyengar, Kenneth Westover, Yuanyuan Zhang, Hak Choy, Robert Timmerman, Steve Jiang, Jing Wang
Stereotactic body radiation therapy (SBRT) has demonstrated high local control rates in early stage non-small cell lung cancer patients who are not ideal surgical candidates. However, distant failure after SBRT is still common. For patients at high risk of early distant failure after SBRT treatment, additional systemic therapy may reduce the risk of distant relapse and improve overall survival. Therefore, a strategy that can correctly stratify patients at high risk of failure is needed. The field of radiomics holds great potential in predicting treatment outcomes by using high-throughput extraction of quantitative imaging features...
June 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28480719/stereotactic-body-radiation-therapy-for-metastases-to-the-kidney-in-patients-with-non-small-cell-lung-cancer-a-new-treatment-paradigm-for-durable-palliation
#8
Vivek Verma, Charles B Simone
BACKGROUND: Cancer metastasis to the kidney is a rare event; treatment must take into account the associated and unique anatomic and physiological challenges of treating the kidney. Stereotactic body radiation therapy (SBRT) is a widely emerging modality of radiotherapy touted for its ability to minimize irradiation to surrounding tissues and to provide a vastly shortened treatment course that is highly biologically potent. However, the use of SBRT to treat kidney neoplasms has been described in only a few case reports generally for primary renal malignancies...
April 2017: Annals of Palliative Medicine
https://www.readbyqxmd.com/read/28480541/response-assessment-of-stereotactic-body-radiation-therapy-using-dynamic-contrast-enhanced-integrated-mr-pet-in-non-small-cell-lung-cancer-patients
#9
Yu-Sen Huang, Jenny Ling-Yu Chen, Feng-Ming Hsu, Jei-Yie Huang, Wei-Chun Ko, Yi-Chang Chen, Fu-Shan Jaw, Ruoh-Fang Yen, Yeun-Chung Chang
PURPOSE: To evaluate the response in patients undergoing SBRT using dynamic contrast-enhanced (DCE) integrated magnetic resonance positron emission tomography (MR-PET). Stereotactic body radiation therapy (SBRT) is efficacious as a front-line local treatment for non-small cell lung cancer (NSCLC). MATERIALS AND METHODS: We prospectively enrolled 19 lung tumors in 17 nonmetastatic NSCLC patients who were receiving SBRT as a primary treatment. They underwent DCE-integrated 3T MR-PET before and 6 weeks after SBRT...
May 8, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28476219/dose-to-heart-substructures-is-associated-with-non-cancer-death-after-sbrt-in-stage-i-ii-nsclc-patients
#10
Barbara Stam, Heike Peulen, Matthias Guckenberger, Frederick Mantel, Andrew Hope, Maria Werner-Wasik, Jose Belderbos, Inga Grills, Nicolette O'Connell, Jan-Jakob Sonke
BACKGROUND AND PURPOSE: To investigate potential associations between dose to heart (sub)structures and non-cancer death, in early stage non-small cell lung cancer (NSCLC) patients treated with stereotactic body radiation therapy (SBRT). METHODS: 803 patients with early stage NSCLC received SBRT with predominant schedules of 3×18Gy (59%) or 4×12Gy (19%). All patients were registered to an average anatomy, their planned dose deformed accordingly, and dosimetric parameters for heart substructures were obtained...
May 2, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28476138/a-comprehensive-dosimetric-study-on-switching-from-a-type-b-to-a-type-c-dose-algorithm-for-modern-lung-sbrt
#11
Christina Zhou, Nathan Bennion, Rongtao Ma, Xiaoying Liang, Shuo Wang, Kristina Zvolanek, Megan Hyun, Xiaobo Li, Sumin Zhou, Weining Zhen, Chi Lin, Andrew Wahl, Dandan Zheng
BACKGROUND: Type-C dose algorithms provide more accurate dosimetry for lung SBRT treatment planning. However, because current dosimetric protocols were developed based on conventional algorithms, its applicability for the new generation algorithms needs to be determined. Previous studies on this issue used small sample sizes and reached discordant conclusions. Our study assessed dose calculation of a Type-C algorithm with current dosimetric protocols in a large patient cohort, in order to demonstrate the dosimetric impacts and necessary treatment planning steps of switching from a Type-B to a Type-C dose algorithm for lung SBRT planning...
May 5, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28466183/phase-i-study-of-stereotactic-body-radiation-therapy-for-centrally-located-stage-ia-non-small-cell-lung-cancer-jrosg10-1
#12
Tomoki Kimura, Yasushi Nagata, Hideyuki Harada, Shinya Hayashi, Yukinori Matsuo, Tsuyoshi Takanaka, Masaki Kokubo, Kenji Takayama, Hiroshi Onishi, Koichi Hirakawa, Yoshiyuki Shioyama, Takeshi Ehara
BACKGROUND: To investigate the maximum tolerated dose (MTD) and recommended dose (RD) of stereotactic body radiation therapy (SBRT) for centrally located stage IA non-small cell lung cancer (NSCLC). METHODS: Five dose levels, ranging from of 52 to 68 Gy in eight fractions, were determined; the treatment protocol began at 60 Gy (level 3). Each dose level included 10 patients. Levels 1-2 were indicated if more than four patients exhibited dose-limiting toxicity (DLT), which was defined as an occurrence of a grade 3 (or worse) adverse effect within 12 months after SBRT initiation...
May 2, 2017: International Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28464316/imaging-features-from-pre-treatment-ct-scans-are-associated-with-clinical-outcomes-in-non-small-cell-lung-cancer-patients-treated-with-stereotactic-body-radiotherapy
#13
Qian Li, Jongphil Kim, Yoganand Balagurunathan, Ying Liu, Kujtim Latifi, Olya Stringfield, Alberto Garcia, Eduardo G Moros, Thomas J Dilling, Matthew B Schabath, Zhaoxiang Ye, Robert J Gillies
PURPOSE: To investigate whether imaging features from pre-treatment planning CT scans are associated with overall survival (OS), recurrence-free survival (RFS), and loco-regional recurrence-free survival (LR-RFS) after stereotactic body radiotherapy (SBRT) among non-small-cell lung cancer (NSCLC) patients. PATIENTS AND METHODS: A total of 92 patients (median age: 73 years) with stage I or IIA NSCLC were qualified for this study. A total dose of 50 Gy in 5 fractions was the standard treatment...
May 2, 2017: Medical Physics
https://www.readbyqxmd.com/read/28462867/monte-carlo-dose-calculation-in-presence-of-low-density-media-application-to-lung-sbrt-treated-during-dibh
#14
S Beilla, T Younes, L Vieillevigne, M Bardies, X Franceries, L Simon
PURPOSE: Commercial algorithms used in Radiotherapy include approximations that are generally acceptable. However their limits can be seen when confronted with small fields and low-density media. These conditions exist during the treatment of lung cancers with Stereotactic Body Radiation Therapy (SBRT) achieved with the "Deep Inspiration Breath Hold" (DIBH) technique. A Monte Carlo (MC) model of a linear accelerator was used to assess the performance of two algorithms (Varian Acuros and AAA) in these conditions...
April 24, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28447170/surgery-or-stereotactic-body-radiotherapy-for-elderly-stage-i-lung-cancer-a-propensity-score-matching-analysis
#15
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
#16
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...
May 2017: Cancer Treatment Reviews
https://www.readbyqxmd.com/read/28433508/organs-at-risk-in-lung-sbrt
#17
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
#18
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
#19
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
#20
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]
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