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Robotized radiosurgery

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https://www.readbyqxmd.com/read/28425348/integration-of-functional-mri-and-white-matter-tractography-in-cyberknife-radiosurgery
#1
Lu Sun, Baolin Qu, Jinyuan Wang, Zhongjian Ju, Zizhong Zhang, Zhiqiang Cui, Yang Jack, Zhipei Ling, Xinguang Yu, Longsheng Pan
PURPOSE: To investigate the efficacy of the integration of functional magnetic resonance imaging and diffusion-tensor imaging tractography data into CyberKnife radiosurgery for intracranial tumor management. MATERIALS AND METHODS: Functional neuroimaging, anatomical magnetic resonance imaging, and computed tomography images of patients with brain lesions in critical areas were acquired before radiosurgery. The acquired data sets were coregistered using the MIM image fusion software module and then were imported into the CyberKnife Robotic Radiosurgery System (Multiplan 4...
January 1, 2017: Technology in Cancer Research & Treatment
https://www.readbyqxmd.com/read/28387434/incidence-of-secondary-glaucoma-after-treatment-of-uveal-melanoma-with-robotic-radiosurgery-versus-brachytherapy
#2
Jakob Siedlecki, Veronika Reiterer, Simon Leicht, Paul Foerster, Karsten Kortüm, Ulrich Schaller, Siegfried Priglinger, Christoph Fuerweger, Alexander Muacevic, Kirsten Eibl-Lindner
PURPOSE: Different modalities of radiation therapy nowadays allow for effective treatment of uveal melanoma combined with the advantage of eye preservation. However, this advantage can secondarily be impaired by radiation-related side effects. After local recurrence, secondary glaucoma (SG) has been described as second most frequent complication leading to need of enucleation. This study compares the incidence of SG after conventional Ruthenium (Ru)-106 brachytherapy (BT) versus CyberKnife robotic radiosurgery (RRS) which has been gaining importance lately as an efficient treatment option offering improved patient comfort...
April 7, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28350952/future-advances-in-spine-surgery-the-aospine-north-america-perspective
#3
Michael G Fehlings, Christopher S Ahuja, Thomas Mroz, Wellington Hsu, James Harrop
This focus issue highlights state-of-the-art techniques, equipment, and practices in the modern era of spine surgery while providing a glimpse into the next generation of patient care. A broad range of topics are presented to cover the full spectrum of the field. Degenerative diseases are discussed in a series of 3 articles on (1) pathophysiology, management, and surgical approaches to degenerative cervical myelopathy; (2) novel approaches to degenerative thoracolumbar disease (eg, interspinous process spacers, minimally invasive/endoscopic approaches); and (3) animal models and emerging therapeutics in degenerative disk disease...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28297348/inverse-treatment-planning-for-spinal-robotic-radiosurgery-an-international-multi-institutional-benchmark-trial
#4
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/28089192/commissioning-monte-carlo-algorithm-for-robotic-radiosurgery-using-cylindrical-3d-array-with-variable-density-inserts
#5
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
#6
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
#7
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
#8
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
#9
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/28048379/su-f-t-598-robotic-radiosurgery-system-versus-pencil-beam-scanning-proton-therapy-for-definitive-intracranial-treatments
#10
M Lin, A Pompos, X Gu, Y Yan, R Abdulrahman, R Timmerman, S Jiang
PURPOSE: To characterize the dose distributions of Cyberknife and intensity-modulated-proton-therapy (IMPT). METHODS: A total of 20 patients previously treated with Cyberknife were selected. The original planning-target-volume (PTV) was used in the 'IMPT-ideal' plan assuming a comparable image-guidance with Cyberknife. A 3mm expansion was made to create the proton-PTV for the 'IMPT-3mm' plan representing the current proton-therapy where a margin of 3mm is used to account for the inferior image-guidance...
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
#11
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/28048280/su-f-t-639-use-of-a-6d-couch-for-real-time-motion-correction-during-frameless-stereotactic-radiosurgery
#12
X Liu, A H Belcher, R Wiersma
PURPOSE: High precision patient positioning is critical in stereotactic radiosurgery (SRS). A 6 Degree-of-freedom (6D) robotic serial couch has the potential to correct both translational and rotational target motion deviations during image-guided radiosurgery procedures. An inverse kinematics algorithm based on the structure of the couch is presented, and a feedback control algorithm is discussed. The feasibility of motion compensation with a 6D couch is demonstrated by simulation with prerecorded volunteer head motion data...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048263/th-ef-brb-08-robotic-motion-compensation-for-radiation-therapy-a-6dof-phantom-study
#13
A H Belcher, X Liu, R Wiersma
PURPOSE: The high accuracy of frame-based stereotactic radiosurgery (SRS), which uses a rigid frame fixed to the patient's skull, is offset by potential drawbacks of poor patient compliance and clinical workflow restrictions. Recent research into frameless SRS has so far resulted in reduced accuracy. In this study, we investigate the use of a novel 6 degree-of-freedom (6DOF) robotic head motion cancellation system that continuously detects and compensates for patient head motions during a SRS delivery...
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
#14
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/28048210/su-g-jep1-10-feasibility-of-cyberknife-tracking-using-the-previously-implanted-permanent-brachytherapy-seed-cloud
#15
J Cheung, J Cunha, A Sudhyadhom, C McGuinness, M Roach, M Descovich
PURPOSE: Robotic radiosurgery is a salvage treatment option for patients with recurrent prostate cancer. We explored the feasibility of tracking the bolus of permanent prostate implants (PPI) using image recognition software optimized to track spinal anatomy. METHODS: Forty-five inert iodine seeds were implanted into a gelatin-based prostate phantom. Four superficial gold seeds were inserted to provide ground-truth alignment. A CT scan of the phantom (120 kVp, 1 mm slice thickness) was acquired and a single-energy iterative metal artifact reduction (MAR) algorithm was used to enhance the quality of the DRR used for tracking...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047808/th-c-brc-03-emerging-linac-based-srs-sbrt-technologies-with-modulated-arc-delivery
#16
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/28047759/th-a-brc-00-new-task-groups-for-external-beam-qa-an-overview
#17
Sonja Dieterich
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/28047583/th-ef-204-04-experience-of-imrt-and-other-conformal-techniques-in-russia
#18
T Krylova
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/28047573/su-g-brb-10-new-generation-of-high-frame-rate-and-high-spatial-resolution-epid-qa-system-for-full-body-mlc-based-robotic-radiosurgery
#19
B Han, L Xing, L Wang
PURPOSE: To systematically investigate an ultra-high spatial-resolution amorphous silicon flat-panel electronic portal imaging device (EPID) for MLC-based full-body robotic radiosurgery geometric and dosimetric quality assurance (QA). METHODS: The high frame-rate and ultra-high spatial resolution EPID is an outstanding detector for measuring profiles, MLC-shaped radiosurgery field aperture verification, and small field dosimetry. A Monte Carlo based technique with a robotic linac specific response and calibration is developed to convert a raw EPID-measured image of a radiosurgery field into water-based dose distribution...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047473/th-ef-204-00-aapm-ampr-russia-sefm-spain-joint-course-on-challenges-and-advantages-of-small-field-radiation-treatment-techniques
#20
Joanna Cygler
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
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