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KMID : 1151820190130050699
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Journal of the Korean Society of Radiology
2019 Volume.13 No. 5 p.699 ~ p.704
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Evaluation of Dose and Image Quality of Lens according to Baseline during Brain CT Scan
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Kim Kyu-Hyung
Kim Sang-Hyun
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Abstract
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It is important to minimize the exposure dose during an examination and obtain good quality images at the same time. This study compared the beam harding effect according to the baseline superior orbito meatal line(SOML), orbito meatal line(OML), inferior orbito metal line(OML) and measured the exposure dose of the lens, especially in brain CT examinations, which generally apply to head diease patients. The beam harding effect assessment of each image along the baseline was performed quantitatively using the Image J program, and the exposure dose of the lens was detected by OSLDs and compared. As a result, As a result, when the SOML was used as the reference line, the dose of the lens was decreased by 85.08% at 80 kV and by 79.7% at 80 kV, compared to when IOML was used as the baseline. If the gantry angle at brain CT was parallel scan to SOML, there were no significant differences in the exposure to the lens and between the OML and IOML. Therefore, this study has shown that it is efficient to have a parallel scan on SOML as a protocol during Brain CT examinations.
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KEYWORD
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Brain CT, Base line, Beam hardening effect, Lens, Dose
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