Not to be confused with Electron beam computed tomography.
Cone beam computed tomography
Cone Beam CT scanner
MeSH
D054894
Cone beam computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, flat panel CT or Digital Volume Tomography (DVT)) is a medical imaging technique consisting of X-ray computed tomography where the X-rays are divergent, forming a cone.[1]
CBCT has become increasingly important in treatment planning and diagnosis in implant dentistry, ENT, orthopedics, and interventional radiology (IR), among other things. Perhaps because of the increased access to such technology, CBCT scanners are now finding many uses in dentistry, such as in the fields of oral surgery, endodontics and orthodontics. Integrated CBCT is also an important tool for patient positioning and verification in image-guided radiation therapy (IGRT).
During dental/orthodontic imaging, the CBCT scanner rotates around the patient's head, obtaining up to nearly 600 distinct images. For interventional radiology, the patient is positioned offset to the table so that the region of interest is centered in the field of view for the cone beam. A single 200 degree rotation over the region of interest acquires a volumetric data set. The scanning software collects the data and reconstructs it, producing what is termed a digital volume composed of three-dimensional voxels of anatomical data that can then be manipulated and visualized with specialized software.[2][3] CBCT shares many similarities with traditional (fan beam) CT however there are important differences, particularly for reconstruction. CBCT has been described as the gold standard for imaging the oral and maxillofacial area.
^Technical Description of CBCT from University of Manchester. Citing: Scarfe WC, Farman AG, Sukovic P (February 2006). "Clinical applications of cone-beam computed tomography in dental practice". Journal of the Canadian Dental Association. 72 (1): 75–80. PMID 16480609.
^Hatcher DC (October 2010). "Operational principles for cone-beam computed tomography". Journal of the American Dental Association. 141 (Suppl 3): 3S–6S. doi:10.14219/jada.archive.2010.0359. PMID 20884933.
^Orth RC, Wallace MJ, Kuo MD (June 2008). "C-arm cone-beam CT: general principles and technical considerations for use in interventional radiology". Journal of Vascular and Interventional Radiology. 19 (6): 814–20. doi:10.1016/j.jvir.2008.02.002. PMID 18503894.
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