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The purpose was to evaluate the perceived spatial and contrast resolution for a wide range of cone-beam computed tomography (CBCT) devices. A customized polymethyl methacrylate (PMMA) phantom was developed. Inserts containing a line-pair and rod pattern were used. The phantom was scanned with 13 CBCT devices and 1 multislice CT (MSCT) device using a variety of scanning protocols. The images were presented to 4 observers for scoring. The observer scores showed excellent agreement. A wide range was seen in image quality between CBCT exposure protocols. Compared with the average CBCT scores, the MSCT protocols scored lower for the line-pair insert but higher for the rod insert. CBCT devices are generally suitable for the visualization of high-contrast structures. Certain exposure protocols can be used for depicting low-contrast structures or fine details. The user should be able to select appropriate exposure protocols according to varying diagnostic requirements. Copyright © 2012 Elsevier Inc. All rights reserved.


Ruben Pauwels, Jilke Beinsberger, Harry Stamatakis, Kostas Tsiklakis, Adrian Walker, Hilde Bosmans, Ria Bogaerts, Reinhilde Jacobs, Keith Horner, SEDENTEXCT Project Consortium. Comparison of spatial and contrast resolution for cone-beam computed tomography scanners. Oral surgery, oral medicine, oral pathology and oral radiology. 2012 Jul;114(1):127-35

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PMID: 22727102

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