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Robotic sbrt

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https://www.readbyqxmd.com/read/28599663/salvage-robotic-sbrt-for-local-prostate-cancer-recurrence-after-radiotherapy-preliminary-results-of-the-oscar-lambret-center
#1
Thomas Leroy, Thomas Lacornerie, Emilie Bogart, Philippe Nickers, Eric Lartigau, David Pasquier
BACKGROUND: Currently, there is no standard option for local salvage treatment for local prostate cancer recurrence after radiotherapy. Our objective was to investigate the feasibility and efficiency of Robotic Stereotactic Body Radiation Therapy (SBRT) in this clinical setting. METHODS/MATERIALS: We retrospectively reviewed patients who were treated at our institution with SBRT for local prostate cancer recurrence after External Beam Radiation Therapy (EBRT) or brachytherapy...
June 9, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28579341/percutaneous-ultrasound-guided-fiducial-marker-placement-for-liver-cancer-robotic-stereotactic-radio-surgery-treatment-a-comparative-analysis-of-three-types-of-markers-and-needles
#2
Maria Marsico, Tommaso Gabbani, Sarah Lunardi, Andrea Galli, Maria Rosa Biagini, Vito Annese
BACKGROUND AND STUDY AIMS: Percutaneous placement of fiducial markers is required to perform stereotactic body radiation therapy (SBRT) for liver neoplastic lesions. This prospective trial was designed to evaluate the feasibility and safety of percutaneous ultrasound-guided placement of three different types of markers in patients with liver cancer referred for SBRT. PATIENTS AND METHODS: Fifty patients underwent percutaneous ultrasound-guided implantation of a fiducial marker in the liver...
June 1, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/28567503/planning-benchmark-study-for-sbrt-of-early-stage-nsclc-results-of-the-degro-working-group-stereotactic-radiotherapy
#3
Christos Moustakis, Oliver Blanck, Fatemeh Ebrahimi Tazehmahalleh, Mark Ka Heng Chan, Iris Ernst, Thomas Krieger, Marciana-Nona Duma, Markus Oechsner, Ute Ganswindt, Christian Heinz, Horst Alheit, Hilbert Blank, Ursula Nestle, Rolf Wiehle, Christine Kornhuber, Christian Ostheimer, Cordula Petersen, Gerhard Pollul, Wolfgang Baus, Georg Altenstein, Eric Beckers, Katrin Jurianz, Florian Sterzing, Matthias Kretschmer, Heinrich Seegenschmiedt, Torsten Maass, Stefan Droege, Ulrich Wolf, Juergen Schoeffler, Uwe Haverkamp, Hans Theodor Eich, Matthias Guckenberger
PURPOSE: The aim was to evaluate stereotactic body radiation therapy (SBRT) treatment planning variability for early stage nonsmall cell lung cancer (NSCLC) with respect to the published guidelines of the Stereotactic Radiotherapy Working Group of the German Society for Radiation Oncology (DEGRO). MATERIALS AND METHODS: Planning computed tomography (CT) scan and the structure sets (planning target volume, PTV; organs at risk, OARs) of 3 patients with early stage NSCLC were sent to 22 radiotherapy departments with SBRT experience: each department was asked to prepare a treatment plan according to the DEGRO guidelines...
May 31, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28514930/hypofractionated-stereotactic-body-radiotherapy-for-localized-prostate-cancer-first-nordic-clinical-experience
#4
Kristiina Koskela, Jan-Erik Palmgren, Janne Heikkilä, Heli Virsunen, Liisa Sailas, Päivi Auvinen, Jan Seppälä, Vesa Kataja
BACKGROUND: The use of hypofractionated stereotactic body radiotherapy (SBRT) as primary treatment modality in clinically localized prostate cancer (PCa) is emerging, because the low α/β-ratio favors the use of high dose per fraction in PCa. There is a need for more data about SBRT, especially in high-risk PCa patients. The purpose of this retrospective study was to evaluate the safety and the short-term efficacy of robotic SBRT in a clinical patient cohort with localized PCa including also high-risk patients (D'Amico risk stratification)...
July 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28490981/robotic-radiosurgery-for-the-treatment-of-liver-metastases
#5
Rafael García, Iciar Santa-Olalla, Jose Luis Lopez Guerra, Silvia Sanchez, Ignacio Azinovic
AIM: This study evaluates the toxicity and outcome in patients treated with robotic radiosurgery for liver metastases. BACKGROUND: Modern technologies allow the delivery of high doses to the liver metastases while lowering the dose to the neighboring organs at risk. Whether this dosimetric advantage translates into clinical benefit is not well known yet. METHODS AND MATERIALS: A total of 9 patients with 17 liver metastases have been treated with robotic stereotactic body radiotherapy SBRT from March 2011 to December 2014...
March 2017: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/28462852/stereotactic-robotic-body-radiotherapy-for-patients-with-unresectable-hepatic-oligorecurrence
#6
Patrick Berkovic, Akos Gulyban, Paul Viet Nguyen, David Dechambre, Philippe Martinive, Nicolas Jansen, Ferenc Lakosi, Levente Janvary, Philippe A Coucke
BACKGROUND: The purpose of this study was to analyze local control (LC), liver progression-free survival (PFS), and distant PFS (DFS), overall survival (OS), and toxicity in a cohort of patients treated with stereotactic body radiotherapy (SBRT) with fiducial tracking for oligorecurrent liver lesions; and to evaluate the potential influence of lesion size, systemic treatment, physical and biologically effective dose (BED), treatment calculation algorithms and other parameters on the obtained results...
March 21, 2017: Clinical Colorectal Cancer
https://www.readbyqxmd.com/read/28438431/phantom-to-clinic-development-of-hypofractionated-stereotactic-body-radiotherapy-for-early-stage-glottic-laryngeal-cancer
#7
Chuxiong Ding, Stephen G Chun, Baran D Sumer, Lucien A Nedzi, Ramzi E Abdulrahman, John S Yordy, Pam Lee, Brian Hrycushko, Timothy D Solberg, Chul Ahn, Robert D Timmerman, David L Schwartz
The purpose of this study was to commission and clinically test a robotic stereotactic delivery system (CyberKnife, Sunnyvale, CA) to treat early-stage glottic laryngeal cancer. We enrolled 15 patients with cTis-T2N0M0 carcinoma of the glottic larynx onto an institutional review board (IRB)-approved clinical trial. Stereotactic body radiotherapy (SBRT) plans prescribed 45 Gy/10 fractions to the involved hemilarynx. SBRT dosimetry was compared with (1) standard carotid-sparing laryngeal intensity-modulated radiation therapy (IMRT) and (2) selective hemilaryngeal IMRT...
July 2017: Medical Dosimetry: Official Journal of the American Association of Medical Dosimetrists
https://www.readbyqxmd.com/read/28297304/evaluation-of-kidney-motion-and-target-localization-in-abdominal-sbrt-patients
#8
Marcus Sonier, William Chu, Nafisha Lalani, Darby Erler, Patrick Cheung, Renee Korol
The purpose of this study was to evaluate bilateral kidney and target translational/rotational intrafraction motion during stereotactic body radiation therapy treatment delivery of primary renal cell carcinoma and oligometastatic adrenal lesions for patients immobilized in the Elekta BodyFIX system. Bilateral kidney motion was assessed at midplane for 30 patients immobilized in a full-body dual-vacuum-cushion system with two patients immobilized via abdominal compression. Intrafraction motion was assessed for 15 patients using kilovoltage cone-beam computed tomography (kV-CBCT) datasets (n=151) correlated to the planning CT...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28244421/dosimetric-implications-of-residual-tracking-errors-during-robotic-sbrt-of-liver-metastases
#9
Mark Chan, Melanie Grehn, Florian Cremers, Frank-Andre Siebert, Stefan Wurster, Stefan Huttenlocher, Jürgen Dunst, Guido Hildebrandt, Achim Schweikard, Dirk Rades, Floris Ernst, Oliver Blanck
PURPOSE: Although the metric precision of robotic stereotactic body radiation therapy in the presence of breathing motion is widely known, we investigated the dosimetric implications of breathing phase-related residual tracking errors. METHODS AND MATERIALS: In 24 patients (28 liver metastases) treated with the CyberKnife, we recorded the residual correlation, prediction, and rotational tracking errors from 90 fractions and binned them into 10 breathing phases. The average breathing phase errors were used to shift and rotate the clinical tumor volume (CTV) and planning target volume (PTV) for each phase to calculate a pseudo 4-dimensional error dose distribution for comparison with the original planned dose distribution...
March 15, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28224113/intensity-modulated-radiation-therapy-with-stereotactic-body-radiation-therapy-boost-for-unfavorable-prostate-cancer-a-report-on-3-year-toxicity
#10
Ima Paydar, Abigail Pepin, Robyn A Cyr, Joseph King, Thomas M Yung, Elizabeth G Bullock, Siyuan Lei, Andrew Satinsky, K William Harter, Simeng Suy, Anatoly Dritschilo, John H Lynch, Thomas P Kole, Sean P Collins
BACKGROUND: Recent data suggest that intensity-modulated radiation therapy (IMRT) plus brachytherapy boost for unfavorable prostate cancer provides improved biochemical relapse-free survival over IMRT alone. Stereotactic body radiation therapy (SBRT) may be a less invasive alternative to brachytherapy boost. Here, we report the 3-year gastrointestinal (GI) and genitourinary (GU) toxicities of IMRT plus SBRT boost. MATERIALS AND METHODS: Between March 2008 and September 2012, patients with prostate cancer were treated with robotic SBRT (19...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28133758/feasibility-of-robotic-stereotactic-body-radiotherapy-of-lung-tumors-with-kilovoltage-x-ray-beams
#11
Susana V Sánchez-Arreola, Héctor M Garnica-Garza
PURPOSE: Robotic Stereotactic body radiation therapy (SBRT) for lung tumors is treatment modality that, for cases of inoperable lung tumors, has shown excellent treatment outcomes. The typical photon energy when delivering this type of treatments is 6 MeV. In this work, using Monte Carlo simulation and realistic patient models we evaluate the characteristics of the absorbed dose distributions that result when x-ray beams of peak spectral energy of 220 keV are used to irradiate lung tumors assuming a robotic SBRT delivery mode...
April 2017: Medical Physics
https://www.readbyqxmd.com/read/28048884/th-ef-204-02-small-field-radiation-therapy-physics-and-recent-recommendations-from-iaea-and-icru
#12
J Seuntjens
Joanna E. Cygler, Jan Seuntjens, J. Daniel Bourland, M. Saiful Huq, Josep Puxeu Vaque, Daniel Zucca Aparicio, Tatiana Krylova, Yuri Kirpichev, Eric Ford, Caridad Borras Stereotactic Radiation Therapy (SRT) utilizes small static and dynamic (IMRT) fields, to successfully treat malignant and benign diseases using techniques such as Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT). SRT is characterized by sharp dose gradients for individual fields and their resultant dose distributions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048471/su-g-jep3-03-effect-of-robot-pose-on-beam-blocking-for-ultrasound-guided-sbrt-of-the-prostate
#13
S Gerlach, I Kuhlemann, F Ernst, C Fuerweger, A Schlaefer
PURPOSE: Ultrasound presents a fast, volumetric image modality for real-time tracking of abdominal organ motion. How-ever, ultrasound transducer placement during radiation therapy is challenging. Recently, approaches using robotic arms for intra-treatment ultrasound imaging have been proposed. Good and reliable imaging requires placing the transducer close to the PTV. We studied the effect of a seven degrees of freedom robot on the fea-sible beam directions. METHODS: For five CyberKnife prostate treatment plans we established viewports for the transducer, i...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048463/th-c-brc-02-a-review-of-emerging-technologies-in-robotic-srs-sbrt-delivery
#14
L Wang
The delivery techniques for SRS/SBRT have been under rapid developments in recent years, which pose new challenges to medical physicists ranging from planning and quality assurance to imaging and motion management. This educational course will provide a general overview of the latest delivery techniques in SRS/SBRT, and discuss the clinical processes to address the challenges of each technique with special emphasis on dedicated gamma-ray based device, robotic x-band linac-based system and conventional C-arm s-band linac-based SRS systems...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048402/su-f-t-569-implementation-of-a-patient-specific-qa-method-using-ebt-xd-for-cyberknife-srs-sbrt-plans
#15
K Zerouali, J Aubry, R Doucet
PURPOSE: To implement the new EBT-XD Gafchromic films for accurate dosimetric and geometric validation of stereotactic radiosurgery (SRS) and stereotactic body radiation therapy (SBRT) CyberKnife (CK) patient specific QA. METHODS: Film calibration was performed using a triplechannel film analysis on an Epson 10000XL scanner. Calibration films were irradiated using a Varian Clinac 21EX flattened beam (0 to 20 Gy), to ensure sufficient dose homogeneity. Films were scanned to a resolution of 0...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048317/su-f-t-576-characterization-of-two-dimensional-liquid-filled-detector-array-srs-1000-in-high-precision-cyberknife-robotic-radiosurgery-system
#16
M Muthukumaran, D Manigandan, V Murali, S Vikraman, S Chitra, K Ganapathy
PURPOSE: The aim of the study is to characterize a two dimensional liquid filled detector array SRS 1000 for routine QA in Cyberknife Robotic Radiosurgery system. METHODS: SRS 1000 consists of 977 liquid filled ionization chambers and is designed to be used in small field SRS/SBRT techniques. The detector array has got two different spacial resolutions. Till field size of 5.5×5.5 cm the spacial resolution is 2.5mm (center to center) and after that till field size of 11 × 11 cm the spacial resolution is 5mm...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048315/su-f-t-650-the-comparison-of-robotic-partial-breast-stereotactic-irradiation-using-mlc-vs-iris-cone
#17
C Ding, R Timmerman, S Jiang, A Rahimi
PURPOSE: To evaluate the dosimetric impact on treatment planning for partial breast stereotactic irradiation using Cyberknife with MLC versus Iris Cone. METHODS: Ten patients whom underwent lumpectomy for DCIS or stage I invasive non-lobular epithelial breast cancer were included in this study. All patients were previously treated on the Cyberknife using Iris cone with the prescription dose of 37.5Gy in 5 fractions covering at least 95% of PTV on our phase I SBRT 5 fraction partial breast irradiation trial...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048231/th-ef-204-03-determination-of-small-field-output-factors-advantages-and-limitations-of-monte-carlo-simulation
#18
J Puxeu Vaque
Joanna E. Cygler, Jan Seuntjens, J. Daniel Bourland, M. Saiful Huq, Josep Puxeu Vaque, Daniel Zucca Aparicio, Tatiana Krylova, Yuri Kirpichev, Eric Ford, Caridad Borras Stereotactic Radiation Therapy (SRT) utilizes small static and dynamic (IMRT) fields, to successfully treat malignant and benign diseases using techniques such as Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT). SRT is characterized by sharp dose gradients for individual fields and their resultant dose distributions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047808/th-c-brc-03-emerging-linac-based-srs-sbrt-technologies-with-modulated-arc-delivery
#19
L Ren
The delivery techniques for SRS/SBRT have been under rapid developments in recent years, which pose new challenges to medical physicists ranging from planning and quality assurance to imaging and motion management. This educational course will provide a general overview of the latest delivery techniques in SRS/SBRT, and discuss the clinical processes to address the challenges of each technique with special emphasis on dedicated gamma-ray based device, robotic x-band linac-based system and conventional C-arm s-band linac-based SRS systems...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047703/su-f-p-31-dosimetric-effects-of-roll-and-pitch-corrections-using-robotic-table
#20
M Mamalui, Z Su, S Flampouri, Z Li
PURPOSE: To quantify the dosimetric effect of roll and pitch corrections being performed by two types of robotic tables available at our institution: BrainLabTM 5DOF robotic table installed at VERO (BrainLab&MHI) dedicated SBRT linear accelerator and 6DOF robotic couch by IBA Proton Therapy with QFixTM couch top. METHODS: Planning study used a thorax phantom (CIRSTM), scanned at 4DCT protocol; targets (IGTV, PTV) were determined according to the institutional lung site-specific standards...
June 2016: Medical Physics
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