Comparison of spatial and contrast resolution for cone-beam computed tomography scanners

Stephen Birch, Ruben Pauwels, Jilke Beinsberger, Harry Stamatakis, Kostas Tsiklakis, Adrian Walker, Hilde Bosmans, Ria Bogaerts, Reinhilde Jacobs, Keith Horner

    Research output: Contribution to journalArticlepeer-review


    Objective: The purpose was to evaluate the perceived spatial and contrast resolution for a wide range of cone-beam computed tomography (CBCT) devices. Study Design: 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. Results: 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. Conclusions: 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. © 2012 Elsevier Inc. All rights reserved.
    Original languageEnglish
    Pages (from-to)127-135
    Number of pages8
    JournalOral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
    Issue number1
    Publication statusPublished - Jul 2012


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