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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/50708
Title: Determination of optimum exposure parameters for dentoalveolar structures of the jaws using the CB MercuRay system with cluster signal-to-noise analysis
Authors: Warangkana Weerawanich
Mayumi Shimizu
Yohei Takeshita
Kazutoshi Okamura
Shoko Yoshida
Gainer R. Jasa
Kazunori Yoshiura
Universidad de la Republica
Okayama University
Kyushu University Hospital
Mahidol University
Kyushu University
Fukuoka Dental College
Keywords: Dentistry;Medicine
Issue Date: 13-Sep-2019
Citation: Oral Radiology. Vol.35, No.3 (2019), 260-271
Abstract: © 2018, Japanese Society for Oral and Maxillofacial Radiology and Springer Nature Singapore Pte Ltd. Objective: To determine the optimum cone beam computed tomography exposure parameters for specific diagnostic tasks. Methods: A Teflon phantom attached to a half-mandible in a large container was scanned in dental (D), implant (I), and panoramic (P) modes. An identical phantom in a small container was scanned in D mode. Both were scanned at 60, 80, 100, and 120 kV. We evaluated the image quality of five anatomical structures [dentinoenamel junction (1), lamina dura and periodontal ligament space (2), trabecular pattern (3), cortex–spongy bone junction (4), and pulp chamber and root canal (5)] and analyzed the diagnostic image quality with cluster signal-to-noise analysis. We then evaluated correlations between the two image qualities and calculated the threshold of acceptable diagnostic image quality. Optimum exposure parameters were determined from images with acceptable diagnostic image quality. Results: For the small container, the optimum exposure parameters were D mode, 80 kV for (1), (3), and (4) and D mode, 100 kV for (5). For the large container, they were D mode, 120 kV for (1), (3), and (5) and D mode, 100 kV for (4). I mode, 120 kV reached the acceptable level for (4). No images reached the acceptable level for (2). Conclusions: No optimum exposure parameters were identified for the evaluation of the lamina dura and periodontal ligament space. D mode was sufficient for the other structures; however, the tube voltage required for each structure differed. Smaller patients required lower tube voltage. I mode, 120 kV may be used for larger lesions.
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/50708
metadata.dc.identifier.url: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85053552070&origin=inward
ISSN: 16139674
09116028
Appears in Collections:Scopus 2019

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