TY - JOUR
T1 - Effect of X-ray beam quality on determination of exposure index
AU - Yasumatsu, Shogo
AU - Tanaka, Nobukazu
AU - Iwase, Kensuke
AU - Shimizu, Yoichiro
AU - Morishita, Junji
N1 - Publisher Copyright:
© 2015, Japanese Society of Radiological Technology and Japan Society of Medical Physics.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - We investigated the effect of X-ray beam qualities RQA3, 5, 7, and 9 on the exposure index (EI) as defined by International Electrotechnical Commission guideline 62494-1. Half-value layers (HVLs) of RQA5 X-rays passing through anti-scatter grids (grid ratios 6:1, 8:1, 10:1, and 12:1) were also evaluated because grids are frequently used in clinical situations. The maximum percent differences in the EIs for RQA3, 7, and 9 with respect to RQA5 were 35.0, 11.6, and 38.7 %, respectively. The range of HVLs for RQA5–7 beams was 7.10–9.10 mm of aluminum (mm Al). This was wider than the range of HVLs when grids were used (6.94–7.29 mm Al). The effect of variations in X-ray beam qualities in the RQA series on the EI was significantly greater than the effect of grids. This study indicated that, in clinical settings, the EI should be used carefully in X-ray examinations with different X-ray beam qualities.
AB - We investigated the effect of X-ray beam qualities RQA3, 5, 7, and 9 on the exposure index (EI) as defined by International Electrotechnical Commission guideline 62494-1. Half-value layers (HVLs) of RQA5 X-rays passing through anti-scatter grids (grid ratios 6:1, 8:1, 10:1, and 12:1) were also evaluated because grids are frequently used in clinical situations. The maximum percent differences in the EIs for RQA3, 7, and 9 with respect to RQA5 were 35.0, 11.6, and 38.7 %, respectively. The range of HVLs for RQA5–7 beams was 7.10–9.10 mm of aluminum (mm Al). This was wider than the range of HVLs when grids were used (6.94–7.29 mm Al). The effect of variations in X-ray beam qualities in the RQA series on the EI was significantly greater than the effect of grids. This study indicated that, in clinical settings, the EI should be used carefully in X-ray examinations with different X-ray beam qualities.
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U2 - 10.1007/s12194-015-0340-3
DO - 10.1007/s12194-015-0340-3
M3 - Article
C2 - 26619973
AN - SCOPUS:84955714882
SN - 1865-0333
VL - 9
SP - 109
EP - 115
JO - Radiological physics and technology
JF - Radiological physics and technology
IS - 1
ER -