Clinical Use of Dual Image-Guided Localization System for Spine Radiosurgery
- Resource Type
- Authors
- Jinkoo Kim; Sangroh Kim; Samuel Ryu; Ning Wen; Nicole Walls; Indrin J. Chetty; Teamour Nurushev; Jian Yue Jin; Benjamin Movsas
- Source
- Technology in Cancer Research & Treatment. 11:123-131
- Subject
- Cancer Research
Cone beam computed tomography
medicine.medical_treatment
Image processing
Stereoscopy
Radiosurgery
Imaging phantom
Pelvis
law.invention
law
Image Processing, Computer-Assisted
Humans
Medicine
Spinal Neoplasms
Phantoms, Imaging
business.industry
Radiotherapy Planning, Computer-Assisted
Isocenter
Cone-Beam Computed Tomography
Prognosis
Spine radiosurgery
Oncology
Particle Accelerators
Localization system
Nuclear medicine
business
Radiotherapy, Image-Guided
- Language
- ISSN
- 1533-0338
1533-0346
The recently released Novalis TX linac platform provides various image guided localization methods including a stereoscopic X-ray imaging technique (ExacTrac) and a volumetric cone beam computed tomography (CBCT) imaging technique. The ExacTrac combined with the robotic six dimensional (6D) couch provides fast and accurate patient setup based on bony structures and offers “snap shot” imaging at any point during the treatment to detect patient motion. The CBCT offers a three dimensional (3D), volumetric image of the patient's setup with visualization of anatomic structures. However, each imaging system has a separate isocenter, which may not coincide with each other or with the linac isocenter. The aim of this paper was to compare the localization accuracy between Exactrac and CBCT for single fraction spine radiosurgery treatments. The study was performed for both phantom and patients (96 clinical treatments of 57 patients). The discrepancies between the isocenter between the ExacTrac and CBCT in four dimensions (three translations and one rotation) were recorded and statistically analyzed using two-tailed t-test.