AJDRAJNR - American Journal of Neuroradiology

Published ahead of print on May 13, 2009
doi: 10.3174/ajnr.A1653
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American Journal of Neuroradiology 30:1088-1095, June-July 2009
© 2009 American Society of Neuroradiology

Review Article

Conebeam CT of the Head and Neck, Part 1: Physical Principles

A.C. Miraclea and S.K. Mukherjia,b,c

a Department of Radiology, University of Michigan Health System, University Hospital, Ann Arbor, Mich
b Department of Otolaryngology, University of Michigan Health System, University Hospital, Ann Arbor, Mich
c Department of Radiation Oncology, University of Michigan Health System, University Hospital, Ann Arbor, Mich

Please address correspondence to Aaron Miracle, University of Michigan Medical Center, Department of Radiology, B2B311 UH SPC 5030, 1500 East Medical Center Dr, Ann Arbor, MI 48109-5030; e-mail: amiracle{at}med.umich.edu

SUMMARY:Conebeam x-ray CT (CBCT) is a developing imaging technique designed to provide relatively low-dose high-spatial-resolution visualization of high-contrast structures in the head and neck and other anatomic areas. This first installment in a 2-part review will address the physical principles underlying CBCT imaging as it is used in dedicated head and neck scanners. Concepts related to CBCT acquisition geometry, flat panel detection, and image quality will be explored in detail. Particular emphasis will be placed on technical limitations to low-contrast detectability and radiation dose. Proposed methods of x-ray scatter reduction will also be discussed.






Copyright © 2010 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X