ID 112388
Title Alternative
現行の口内法デジタルX線撮影システム間の薄い対象物及び厚い対象物におけるコントラストの違いの評価
Author
Dashpuntsag, Oyunbat Tokushima University
Kasai, Ryosuke Tokushima University
Keywords
Digital Imaging System
PSP
CCD
Content Type
Thesis or Dissertation
Description
The purpose is to evaluate the performance of current intraoral digital detectors in detail using a precise phantom and new method. Two aluminum step wedges in 0.5 mm steps were exposed by two photostimulable phosphor plate (PSP) systems—one with automatic exposure compensation (AEC) and the other without AEC—and a CCD sensor. Images were obtained with 3 doses at 60 kV. The effect of metallic material also was evaluated. The contrast-to-noise ratio (CNR) for thinner steps and the low contrast value (LCV) for thicker steps were obtained. The CCD system was the best under all conditions (𝑃 < 0.001), although the Gray value was sensitive to the dose, and the Gray value-dose relation varied greatly. The PSP system with AEC was superior to that without AEC for the LCV (𝑃 < 0.001) but was inferior to it regarding the CNR (𝑃 < 0.001). CNR and LCV in the PSP system without AEC were not affected by the metallic plate. Intraoral digital imaging systems should be chosen according to their diagnostic purpose. PSP system with AEC may be the best for detecting molar proximal caries, whereas the PSP system without AEC may be better for evaluating small bone regeneration in periodontal disease. The CCD system provided the best performance.
Journal Title
BioMed Research International
ISSN
23146133
23146141
Publisher
Hindawi
Volume
2017
Start Page
5215413
Published Date
2017-04-09
Remark
内容要旨・審査要旨・論文本文の公開
本論文は,著者Oyunbat Dashpuntsagの学位論文として提出され,学位審査・授与の対象となっている。
Rights
Copyright © 2017 Oyunbat Dashpuntsag et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.( https://creativecommons.org/licenses/by/4.0/ )
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
ETD
MEXT report number
甲第3181号
Diploma Number
甲口第438号
Granted Date
2018-03-23
Degree Name
Doctor of Philosophy
Grantor
Tokushima University
departments
Oral Sciences