Effect of X-ray beam quality on determination of exposure index
| Autor: | Shogo Yasumatsu, Junji Morishita, Nobukazu Tanaka, Yoichiro Shimizu, K Iwase |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Quality Control
Radiation Materials science business.industry X-Rays Physical Therapy Sports Therapy and Rehabilitation Clinical settings Environmental Exposure General Medicine Environmental exposure Grid X ray beam Anti-scatter grid 030218 nuclear medicine & medical imaging Radiographic Image Enhancement 03 medical and health sciences 0302 clinical medicine Optics Quality (physics) 030220 oncology & carcinogenesis Scattering Radiation Radiology Nuclear Medicine and imaging Computed radiography business Beam (structure) |
| Zdroj: | Radiological Physics and Technology. 9:109-115 |
| ISSN: | 1865-0341 1865-0333 |
| DOI: | 10.1007/s12194-015-0340-3 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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