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http://dx.doi.org/10.17946/JRST.2017.40.4.02

Comparison of the Surface Dose of the Thyroid according to AP versus PA Positioning in Cervical Spine Oblique View  

Park, Jeong-Ho (Dept. of Radiology, Konkuk University Medical Center)
Yang, Sung-Gyu (Dept. of Radiology, Konkuk University Medical Center)
Kim, Ki-Jeong (Dept. of Radiology, Konkuk University Medical Center)
Joo, Young-Cheol (Dept. of Radiology, Samsung Medical Center)
Hong, Dong-Hee (Dept. of Radiology Science, Far East University)
Lim, Woo-Taek (Dept. of Radiology, Konkuk University Medical Center)
Publication Information
Journal of radiological science and technology / v.40, no.4, 2017 , pp. 543-548 More about this Journal
Abstract
The aim of this study was to evaluate anteroposterior oblique(RPO, LPO) and posteroanterior oblique(LAO, RAO) projections of the cervical spine, at various kVp and mA s increments, in order to compare thyroid surface dose. Using Rando phantom, dosimeter was attached to the Cervical spine 4~5 to measure the surface dose in the same thyroid position. As a result, the surface dose was $595.08{\pm}215.01{\mu}Gy$ for anteroposterior oblique(RPO, LPO) projections and $64.21{\pm}33.49{\mu}Gy$ for posteroanterior oblique(LAO, RAO) projections by changing kVp increment. The surface dose was $445.20{\pm}230.90{\mu}Gy$ for anteroposterior oblique(RPO, LPO) projections and $44.51{\pm}22.77{\mu}Gy$ for posteroanterior oblique(LAO, RAO) projections by changing mAs increment. The posteroanterior oblique method could reduce about 90% the surface dose than the anteroposterior oblique method. There were statistically significant differences among the examinations(p<0.001). Change the direction of position to reduce the surface dose at oblique projection of cervical spine. Therefore, we consider posteroanterior oblique projections than anteroposterior oblique projections of cervical spine examination in other to reduce patient surface dose.
Keywords
Cervical spine; Thyroid; Surface dose; Oblique view; X-ray radiography;
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Times Cited By KSCI : 3  (Citation Analysis)
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