SU-E-I-52: Effect of Various X-Ray Beam Qualities On the Exposure Index
Abstract
Purpose: The exposure index (EI) proposed by the International Electrotechnical Commission (IEC) 62494-1 is expected to be utilized as a standard dose index by every manufacturer. The IEC recommended the usage of RQA5 for the EI. However, X-ray beam qualities, particularly in clinical practices, vary depending on the examination objects and exposure conditions, including usage of anti-scatter grids. We investigated the effects of the X-ray beam qualities other than RQA5 on the EI. Methods: The Xray beam qualities of RQA3, 5, 7, and 9 in IEC 61267 Ed. 1.0 were adopted in a computed radiography system. A uniform exposure without objects was performed to measure the exposure indicators (S values) and air kerma (K). The relational equations between the S values and K were derived for the determination of the EI values. The EI values for RQA3, 7, and 9 were compared to those for RQA5 at the fixed S values of 100, 200, 400, and 600. Finally, the half-value layers (HVLs) using four grids (ratio 6:1, 8:1, 10:1, and 12:1) for the RQA5 X-ray were compared to those with RQA3–9. Results: The EI values for RQA3, 7, and 9 were up to 35.3%, 11.8%, and 38.7% higher, respectively, thanmore »
- Authors:
-
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University (Japan)
- Department of Radiological Science, Faculty of Health Sciences, Junshin Gakuen University (Japan)
- Department of Health Sciences, Faculty of Medical Sciences, Kyushu University (Japan)
- Publication Date:
- OSTI Identifier:
- 22494005
- Resource Type:
- Journal Article
- Journal Name:
- Medical Physics
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 6; Other Information: (c) 2015 American Association of Physicists in Medicine; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-2405
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 60 APPLIED LIFE SCIENCES; BEAMS; INTERNATIONAL ELECTROTECHNICAL COMMISSION; KERMA; MANUFACTURERS; RADIATION DOSES
Citation Formats
Yasumatsu, S, Iwase, K, Shimizu, Y, Tanaka, N, and Morishita, J. SU-E-I-52: Effect of Various X-Ray Beam Qualities On the Exposure Index. United States: N. p., 2015.
Web. doi:10.1118/1.4924049.
Yasumatsu, S, Iwase, K, Shimizu, Y, Tanaka, N, & Morishita, J. SU-E-I-52: Effect of Various X-Ray Beam Qualities On the Exposure Index. United States. https://doi.org/10.1118/1.4924049
Yasumatsu, S, Iwase, K, Shimizu, Y, Tanaka, N, and Morishita, J. 2015.
"SU-E-I-52: Effect of Various X-Ray Beam Qualities On the Exposure Index". United States. https://doi.org/10.1118/1.4924049.
@article{osti_22494005,
title = {SU-E-I-52: Effect of Various X-Ray Beam Qualities On the Exposure Index},
author = {Yasumatsu, S and Iwase, K and Shimizu, Y and Tanaka, N and Morishita, J},
abstractNote = {Purpose: The exposure index (EI) proposed by the International Electrotechnical Commission (IEC) 62494-1 is expected to be utilized as a standard dose index by every manufacturer. The IEC recommended the usage of RQA5 for the EI. However, X-ray beam qualities, particularly in clinical practices, vary depending on the examination objects and exposure conditions, including usage of anti-scatter grids. We investigated the effects of the X-ray beam qualities other than RQA5 on the EI. Methods: The Xray beam qualities of RQA3, 5, 7, and 9 in IEC 61267 Ed. 1.0 were adopted in a computed radiography system. A uniform exposure without objects was performed to measure the exposure indicators (S values) and air kerma (K). The relational equations between the S values and K were derived for the determination of the EI values. The EI values for RQA3, 7, and 9 were compared to those for RQA5 at the fixed S values of 100, 200, 400, and 600. Finally, the half-value layers (HVLs) using four grids (ratio 6:1, 8:1, 10:1, and 12:1) for the RQA5 X-ray were compared to those with RQA3–9. Results: The EI values for RQA3, 7, and 9 were up to 35.3%, 11.8%, and 38.7% higher, respectively, than that for RQA5 at the S value of 600. The HVLs without grids and with various grids for RQA5 were 6.85 mm Al. and in the range of 6.94–7.29 mm Al. (ΔHVL: up to 0.44 mm Al.), respectively. This variation in the HVLs with grids was smaller than that observed for RQA3–9 (ΔHVL: 2.0–7.5 mm Al.). Conclusion: Although the usage of grids may not greatly affect the EI, the X-ray beam quality for the determination of the EI cannot be ignored in the clinical evaluation of the dose index.},
doi = {10.1118/1.4924049},
url = {https://www.osti.gov/biblio/22494005},
journal = {Medical Physics},
issn = {0094-2405},
number = 6,
volume = 42,
place = {United States},
year = {Mon Jun 15 00:00:00 EDT 2015},
month = {Mon Jun 15 00:00:00 EDT 2015}
}