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http://dx.doi.org/10.7742/jksr.2022.16.7.897

A Study on the Diagnostic Reference Level of Skull Radiography in Digital Radiography  

Yeon-Jin, Jeong (Department of Radiology, Samsung Medical Center)
Young-Cheol, Joo (Department of Radiology, Samsung Medical Center)
Dong-Hee, Hong (Department of Radiological Science, Shinhan University)
Sang-Hyeon, Kim (Department of Radiological Science, Shinhan University)
Publication Information
Journal of the Korean Society of Radiology / v.16, no.7, 2022 , pp. 897-904 More about this Journal
Abstract
The purpose of this study is to compare the difference in dose and image quality when applying the diagnostic reference level (DRL) test conditions for head radiography in a digital radiation environment and the test conditions currently applied in clinical practice. I would like to review the conditions of radiographic examination. In this study, the head model phantom was targeted, and the investigation conditions were divided into clinical conditions (Clinic), DRL value (DRL75), and DRL average value (DRLmean). For dose, Enterance surface dose (ESD) was measured, and for image quality, signal-to-noise ratio and contrast-to-noise ratio were measured and analyzed for comparison. The average values of skull anterior posterior(AP) ESD according to the changes in test conditions were Clinic 1214.03±4.21 µGy, DRL75 3017.83±8.14 µGy, DRLmean 2283.50±7.09 µGy, and skull lateral (Lat). The average value of ESD was statistically significant with Clinic 762.79±3.54 µGy, DRL75 2168.57±10.83 µGy, and DRLmean 1654.43±6.48 µGy (p<0.01). The average values of SNR and CNR measured in the orbital, maxillary sinus, frontal sinus, and sella turcica were statistically significant (p<0.01). As a result of this study, compared to DRL, the conditions used in clinical practice showed lower dose levels of about 58% for AP and about 70% for Lat., and there was no qualitative difference in terms of image quality. Through this study, it is necessary to consider a new diagnostic reference level suitable for the digital radiation environment, and it is considered that the dose should be reduced accordingly.
Keywords
Skull Anteroposterior and Lateral Radiography; Diagnostic Reference Level; Entrance Surface Dose; Signal to Noise Ratio; Contrast to Noise Ratio;
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