Panoramic cone beam computed tomography

Medical Physics
Jenghwa ChangK S Clifford Chao

Abstract

Cone-beam computed tomography (CBCT) is the main imaging tool for image-guided radiotherapy but its functionality is limited by a small imaging volume and restricted image position (imaged at the central instead of the treatment position for peripheral lesions to avoid collisions). In this paper, the authors present the concept of "panoramic CBCT," which can image patients at the treatment position with an imaging volume as large as practically needed. In this novel panoramic CBCT technique, the target is scanned sequentially from multiple view angles. For each view angle, a half scan (180° + θ(cone) where θ(cone) is the cone angle) is performed with the imaging panel positioned in any location along the beam path. The panoramic projection images of all views for the same gantry angle are then stitched together with the direct image stitching method (i.e., according to the reported imaging position) and full-fan, half-scan CBCT reconstruction is performed using the stitched projection images. To validate this imaging technique, the authors simulated cone-beam projection images of the Mathematical Cardiac Torso (MCAT) thorax phantom for three panoramic views. Gaps, repeated/missing columns, and different exposure levels were int...Continue Reading

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Citations

Jul 6, 2014·Medical Physics·Rune Slot Thing, Ernesto Mainegra-Hing
Jan 19, 2016·Frontiers in Surgery·Guoyan Zheng, Lutz P Nolte
Sep 14, 2015·Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society·Guoyan Zheng, Shuo Li
Mar 24, 2018·Medical Physics·Javad FotouhiNassir Navab
Nov 5, 2019·Reports of Practical Oncology and Radiotherapy : Journal of Greatpoland Cancer Center in Poznań and Polish Society of Radiation Oncology·D van EedenF C P du Plessis

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