Cone beam computed tomography image guidance system for a dedicated intracranial radiosurgery treatment unit

International Journal of Radiation Oncology, Biology, Physics
Mark RuschinDavid A Jaffray

Abstract

Image guidance has improved the precision of fractionated radiation treatment delivery on linear accelerators. Precise radiation delivery is particularly critical when high doses are delivered to complex shapes with steep dose gradients near critical structures, as is the case for intracranial radiosurgery. To reduce potential geometric uncertainties, a cone beam computed tomography (CT) image guidance system was developed in-house to generate high-resolution images of the head at the time of treatment, using a dedicated radiosurgery unit. The performance and initial clinical use of this imaging system are described. A kilovoltage cone beam CT system was integrated with a Leksell Gamma Knife Perfexion radiosurgery unit. The X-ray tube and flat-panel detector are mounted on a translational arm, which is parked above the treatment unit when not in use. Upon descent, a rotational axis provides 210° of rotation for cone beam CT scans. Mechanical integrity of the system was evaluated over a 6-month period. Subsequent clinical commissioning included end-to-end testing of targeting performance and subjective image quality performance in phantoms. The system has been used to image 2 patients, 1 of whom received single-fraction radiosur...Continue Reading

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May 18, 2010·International Journal of Radiation Oncology, Biology, Physics·Arjun SahgalLijun Ma
Aug 31, 2010·International Journal of Radiation Oncology, Biology, Physics·Yeon-Joo KimSeung Hoon Lee

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Citations

May 3, 2013·Medical Physics·Tewfik BichayColin G Orton
Jan 15, 2014·Zeitschrift für medizinische Physik·Daniel SchmidhalterPeter Manser
Jan 15, 2013·International Journal of Radiation Oncology, Biology, Physics·Mark RuschinDavid Jaffray
Jan 15, 2013·International Journal of Radiation Oncology, Biology, Physics·Rex Cheung
Mar 24, 2015·Nihon Hoshasen Gijutsu Gakkai zasshi·Hisato Nakazawa, Yukio Uchiyama
Aug 12, 2016·International Journal of Radiation Oncology, Biology, Physics·Winnie LiCaroline Chung
Oct 20, 2018·Journal of Applied Clinical Medical Physics·SayedMasoud HashemiMark Ruschin
May 12, 2016·Journal of Applied Clinical Medical Physics·Alvaro Rojas-VillabonaIan Paddick
Apr 3, 2020·Journal of Applied Clinical Medical Physics·Ans C C SwinnenFrank Verhaegen

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