Quantitative Measurement of CyberKnife Robotic Arm Steering

Wong, Kenneth H.; Dieterich, Sonja; Tang, Jonathan; Cleary, Kevin

doi:10.1177/153303460700600601

Cited by 40 publications

(40 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…49) discusses the general concepts of managing respiratory motion in Radiation Oncology. At this time, the CyberKnife V R system relies on a hybrid tracking model correlating skin motion detected at approximately 30 Hz with the internal target detected radiographically during an interval of 30-60 s. [50][51][52] It is conceivable that in the near future, motion modeling systems may be replaced by direct real-time tracking systems. 53,54 Fiducials (with the exception of XSight V R Lung) are used as surrogates for the tumor location.…”

Section: Iiid Motion Tracking (Synchrony) Qamentioning

confidence: 99%

Report of AAPM TG 135: Quality assurance for robotic radiosurgery

et al. 2011

Self Cite

View full text Add to dashboard Cite

The task group (TG) for quality assurance for robotic radiosurgery was formed by the American Association of Physicists in Medicine's Science Council under the direction of the Radiation Therapy Committee and the Quality Assurance (QA) Subcommittee. The task group (TG-135) had three main charges: (1) To make recommendations on a code of practice for Robotic Radiosurgery QA; (2) To make recommendations on quality assurance and dosimetric verification techniques, especially in regard to real-time respiratory motion tracking software; (3) To make recommendations on issues which require further research and development. This report provides a general functional overview of the only clinically implemented robotic radiosurgery device, the CyberKnife V R . This report includes sections on device components and their individual component QA recommendations, followed by a section on the QA requirements for integrated systems. Examples of checklists for daily, monthly, annual, and upgrade QA are given as guidance for medical physicists. Areas in which QA procedures are still under development are discussed.

show abstract

Section: Iiid Motion Tracking (Synchrony) Qamentioning

confidence: 99%

Report of AAPM TG 135: Quality assurance for robotic radiosurgery

et al. 2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, this method requires attachment of the camera to coaxial fixation jigs, which are not commercially available (13) . Thus, to determine the precision of the CyberKnife system, Wong et al (14) attached LED markers to the CyberKnife head and to the target, and simultaneously evaluated precision during irradiation.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of tracking accuracy of the CyberKnife system using a webcam and printed calibrated grid

Sumida

Shiomi

Higashinaka³

et al. 2016

J Applied Clin Med Phys

View full text Add to dashboard Cite

Tracking accuracy for the CyberKnife's Synchrony system is commonly evaluated using a film‐based verification method. We have evaluated a verification system that uses a webcam and a printed calibrated grid to verify tracking accuracy over three different motion patterns. A box with an attached printed calibrated grid and four fiducial markers was attached to the motion phantom. A target marker was positioned at the grid's center. The box was set up using the other three markers. Target tracking accuracy was evaluated under three conditions: 1) stationary; 2) sinusoidal motion with different amplitudes of 5, 10, 15, and 20 mm for the same cycle of 4 s and different cycles of 2, 4, 6, and 8 s with the same amplitude of 15 mm; and 3) irregular breathing patterns in six human volunteers breathing normally. Infrared markers were placed on the volunteers’ abdomens, and their trajectories were used to simulate the target motion. All tests were performed with one‐dimensional motion in craniocaudal direction. The webcam captured the grid's motion and a laser beam was used to simulate the CyberKnife's beam. Tracking error was defined as the difference between the grid's center and the laser beam. With a stationary target, mean tracking error was measured at 0.4 mm. For sinusoidal motion, tracking error was less than 2 mm for any amplitude and breathing cycle. For the volunteers’ breathing patterns, the mean tracking error range was 0.78‐1.67 mm. Therefore, accurate lesion targeting requires individual quality assurance for each patient.PACS number(s): 87.55.D‐, 87.55.km, 87.55.Qr, 87.56.Fc

show abstract

“…This correlation model is then used to guide the linear accelerator via the robotic arm to move with the moving target during the irradiation. The total system accuracy of the Robotic stereotactic radioablation/motion tracking has been reported as <1 mm (5,7), which allowed the use of much smaller margins compared with conventional radiosurgery and therapy methods.…”

Section: Methodsmentioning

confidence: 99%

“…The RSR robotic radiosurgery system has been previously described (5)(6)(7). Briefly, the RSR used in the study consisted of a compact linear accelerator manipulated by a robotic arm capable of six degrees-of-freedom motion; two orthogonally placed X-ray cameras and their receptors on the floor; and a real-time respiratory tracking system called Synchrony (Accuray), which uses light-emitting diodes placed on the freely breathing patient's chest whose motion was correlated with the motion of the internal gold fiducials detected by the X-ray cameras.…”

Section: Methodsmentioning

confidence: 99%