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KMID : 0357520170400040543
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Journal of Radiological Science and Technology
2017 Volume.40 No. 4 p.543 ~ p.548
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Comparison of the Surface Dose of the Thyroid according to AP versus PA Positioning in Cervical Spine Oblique View
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Park Jeong-Ho
Yang Sung-Gyu
Kim Ki-Jeong
Joo Young-Cheol
Hong Dong-Hee
Lim Woo-Teak
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Abstract
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The aim of this study was to evaluate anteroposterior oblique(RPO, LPO) and posteroanterior oblique( LAO, R AO) p rojections o f the cervical s pine, at v arious kVp a nd mA s increments, in o rder 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±215.01 μGy for anteroposterior oblique(RPO, LPO) projections and 64.21±33.49 μGy for posteroanterior oblique(LAO, RAO) projections by changing kVp increment. The surface dose was 445.20±230.90 μGy for anteroposterior oblique( RPO, LPO) projections and 44.51±22.77 μGy 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.
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KEYWORD
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Cervical spine, Thyroid, Surface dose, Oblique view, X-ray radiography
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