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

作者：Pauwels Ruben^*; Bein**erger Jilke; Stamatakis Harry; Tsiklakis Kostas; Walker Adrian; Bosmans Hilde; Bogaerts Ria; Jacobs Reinhilde; Horner Keith

来源：Oral Surgery Oral Medicine Oral Pathology Oral Radiology, 2012, 114(1): 127-135.

DOI：10.1016/j.oooo.2012.01.020

Objective. The purpose was to evaluate the perceived spatial and contrast resolution for a wide range of cone-beam computed tomography (CBCT) devices. %26lt;br%26gt;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. %26lt;br%26gt;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. %26lt;br%26gt;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. (Oral Surg Oral Med Oral Pathol Oral Radiol 2012;114:127-135)

• 出版日期2012-7
• 单位test