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https://www.readbyqxmd.com/read/28324876/re-irradiation-of-locoregional-nsclc-recurrence-using-robotic-stereotactic-body-radiotherapy
#1
Cemile Ceylan, Andaç Hamacı, Hande Ayata, Kezban Berberoglu, Ayhan Kılıç, Metin Güden, Kayıhan Engin
No abstract text is available yet for this article.
March 9, 2017: Oncology Research and Treatment
https://www.readbyqxmd.com/read/28297348/inverse-treatment-planning-for-spinal-robotic-radiosurgery-an-international-multi-institutional-benchmark-trial
#2
Oliver Blanck, Lei Wang, Wolfgang Baus, Jimm Grimm, Thomas Lacornerie, Joakim Nilsson, Sergii Luchkovskyi, Isabel Palazon Cano, Zhenyu Shou, Myriam Ayadi, Harald Treuer, Romain Viard, Frank-Andre Siebert, Mark K H Chan, Guido Hildebrandt, Jürgen Dunst, Detlef Imhoff, Stefan Wurster, Robert Wolff, Pantaleo Romanelli, Eric Lartigau, Robert Semrau, Scott G Soltys, Achim Schweikard
Stereotactic radiosurgery (SRS) is the accurate, conformal delivery of high-dose radiation to well-defined targets while minimizing normal structure doses via steep dose gradients. While inverse treatment planning (ITP) with computerized optimization algorithms are routine, many aspects of the planning process remain user-dependent. We performed an international, multi-institutional benchmark trial to study planning variability and to analyze preferable ITP practice for spinal robotic radiosurgery. 10 SRS treatment plans were generated for a complex-shaped spinal metastasis with 21 Gy in 3 fractions and tight constraints for spinal cord (V14Gy<2 cc, V18Gy<0...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297304/evaluation-of-kidney-motion-and-target-localization-in-abdominal-sbrt-patients
#3
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/28279147/dosimetric-comparison-and-evaluation-of-4-stereotactic-body-radiotherapy-techniques-for-the-treatment-of-prostate-cancer
#4
Jan Seppälä, Sami Suilamo, Mikko Tenhunen, Liisa Sailas, Heli Virsunen, Erna Kaleva, Jani Keyriläinen
PURPOSE: The aim of this study was to compare dosimetric characteristics, monitor unit, and delivery efficiency of 4 different stereotactic body radiotherapy techniques for the treatment of prostate cancer. METHODS: This study included 8 patients with localized prostate cancer. Dosimetric assets of 4 delivery techniques for stereotactic body radiotherapy were evaluated: robotic CyberKnife, noncoplanar intensity-modulated radiotherapy, and 2 intensity-modulated arc therapy techniques (RapidArc and Elekta volumetric-modulated arc therapy)...
April 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/28269413/accuracy-assessment-and-kinematic-calibration-of-the-robotic-endoscopic-microsurgical-system
#5
Lihang Feng, Paul Wilkening, Yunuscan Sevimli, Marcin Balicki, Kevin C Olds, Russell H Taylor
This paper explores the general stereotactic accuracy of the Robotic Endoscopic Microsurgical System (REMS) by calibrating with a standard optical tracking system. Based on a simple yet effective test protocol, the proposed calibration method combines hand-eye calibration with Bernstein polynomials to improve our kinematic pose accuracy.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28261785/accuracy-of-intracranial-electrode-placement-for-stereoencephalography-a-systematic-review-and-meta-analysis
#6
REVIEW
Vejay N Vakharia, Rachel Sparks, Aidan G O'Keeffe, Roman Rodionov, Anna Miserocchi, Andrew McEvoy, Sebastien Ourselin, John Duncan
OBJECTIVE: Stereoencephalography (SEEG) is a procedure in which electrodes are inserted into the brain to help define the epileptogenic zone. This is performed prior to definitive epilepsy surgery in patients with drug-resistant focal epilepsy when noninvasive data are inconclusive. The main risk of the procedure is hemorrhage, which occurs in 1-2% of patients. This may result from inaccurate electrode placement or a planned electrode damaging a blood vessel that was not detected on the preoperative vascular imaging...
March 6, 2017: Epilepsia
https://www.readbyqxmd.com/read/28254596/robot-assisted-stereotactic-biopsy-of-diffuse-intrinsic-pontine-glioma-a-single-centre-experience
#7
Andrea Carai, Angela Mastronuzzi, Alessandro De Benedictis, Raffaella Messina, Antonella Cacchione, Evelina Miele, Franco Randi, Giacomo Esposito, Andrea Trezza, Giovanna Stefania Colafati, Alessandra Savioli, Franco Locatelli, Carlo Efisio Marras
BACKGROUND: Diffuse Intrinsic Pontine Glioma (DIPG) is a childhood tumor with dismal prognosis. Emerging molecular signatures have paved the way for stereotactic biopsy in selected Centers. We present our experience in DIPG stereotactic needle biopsy using the Robotic Stereotactic Assisted system (ROSA™) in a consecutive pediatric series. METHODS: All stereotactic biopsy procedures for DIPG performed during the last year at our Institution were considered. All procedures were carried out using the ROSA™ surgical assistant through a precoronary approach...
February 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28244421/dosimetric-implications-of-residual-tracking-errors-during-robotic-sbrt-of-liver-metastases
#8
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/28227656/accuracy-assessment-and-kinematic-calibration-of-the-robotic-endoscopic-microsurgical-system
#9
Lihang Feng, Paul Wilkening, Yunuscan Sevimli, Marcin Balicki, Kevin C Olds, Russell H Taylor, Lihang Feng, Paul Wilkening, Yunuscan Sevimli, Marcin Balicki, Kevin C Olds, Russell H Taylor, Paul Wilkening, Russell H Taylor, Kevin C Olds, Marcin Balicki, Lihang Feng, Yunuscan Sevimli
This paper explores the general stereotactic accuracy of the Robotic Endoscopic Microsurgical System (REMS) by calibrating with a standard optical tracking system. Based on a simple yet effective test protocol, the proposed calibration method combines hand-eye calibration with Bernstein polynomials to improve our kinematic pose accuracy.
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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/28169225/intensity-based-2d-3d-registration-for-lead-localization-in-robot-guided-deep-brain-stimulation
#11
Stefan Hunsche, Dieter Sauner, Faycal El Majdoub, Clemens Neudorfer, Jörg Poggenborg, Axel Goßmann, Mohammad Maarouf
Intraoperative assessment of lead localization has become a standard procedure during deep brain stimulation surgery in many centers, allowing immediate verification of targeting accuracy and, if necessary, adjustment of the trajectory. The most suitable imaging modality to determine lead positioning, however, remains controversially discussed. Current approaches entail the implementation of computed tomography and magnetic resonance imaging. In the present study, we adopted the technique of intensity-based 2D 3D registration that is commonly employed in stereotactic radiotherapy and spinal surgery...
March 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28133758/feasibility-of-robotic-stereotactic-body-radiotherapy-of-lung-tumors-with-kilovoltage-x-ray-beams
#12
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 6MeV. 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 220keV are used to irradiate lung tumors assuming a robotic SBRT delivery mode...
January 30, 2017: Medical Physics
https://www.readbyqxmd.com/read/28120771/diffuse-intrinsic-pontine-gliomas-in-children-interest-of-robotic-frameless-assisted-biopsy-a-technical-note
#13
H A Coca, H Cebula, M Benmekhbi, M P Chenard, N Entz-Werle, F Proust
INTRODUCTION: Diffuse intrinsic pontine gliomas (DIPG) constitute 10-15% of all brain tumors in the pediatric population; currently prognosis remains poor, with an overall survival of 7-14 months. Recently the indication of DIPG biopsy has been enlarged due to the development of molecular biology and various ongoing clinical and therapeutic trials. Classically a biopsy is performed using a stereotactic frame assisted procedure but the workflow may sometimes be heavy and more complex especially in children...
December 2016: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28089192/commissioning-monte-carlo-algorithm-for-robotic-radiosurgery-using-cylindrical-3d-array-with-variable-density-inserts
#14
D Dechambre, V Baart, S Cucchiaro, C Ernst, N Jansen, P Berkovic, C Mievis, P Coucke, A Gulyban
INTRODUCTION: To commission the Monte Carlo (MC) algorithm based model of CyberKnife robotic stereotactic system (CK) and evaluate the feasibility of patient specific QA using the ArcCHECK cylindrical 3D-array (AC) with Multiplug inserts (MP). RESULTS: Four configurations were used for simple beam setup and two for patient QA, replacing water equivalent inserts by lung. For twelve collimators (5-60mm) in simple setup, mean (SD) differences between MC and RayTracing algorithm (RT) of the number of points failing the 3%/1mmgamma criteria were 1(1), 1(3), 1(2) and 1(2) for the four MP configurations...
January 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28048884/th-ef-204-02-small-field-radiation-therapy-physics-and-recent-recommendations-from-iaea-and-icru
#15
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/28048509/th-a-brc-03-aapm-tg218-measurement-methods-and-tolerance-levels-for-patient-specific-imrt-verification-qa
#16
M Miften
AAPM TG-135U1 QA for Robotic Radiosurgery - Sonja Dieterich Since the publication of AAPM TG-135 in 2011, the technology of robotic radiosurgery has rapidly developed. AAPM TG-135U1 will provide recommendations on the clinical practice for using the IRIS collimator, fiducial-less real-time motion tracking, and Monte Carlo based treatment planning. In addition, it will summarize currently available literature about uncertainties. LEARNING OBJECTIVES: 1. Understand the progression of technology since the first TG publication 2...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048463/th-c-brc-02-a-review-of-emerging-technologies-in-robotic-srs-sbrt-delivery
#17
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
#18
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
#19
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
#20
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
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