Evaluation of X-ray table mattresses for radiation attenuation and impact on image quality
| Autor: | N. M. T. Alresheedi, AK Tootell, L.A. Walton, JS Webb, Peter Hogg |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Dosimeter
business.industry Image quality Phantoms Imaging Radiography Attenuation X-Rays Beds Imaging phantom 030218 nuclear medicine & medical imaging 03 medical and health sciences Kerma 0302 clinical medicine Quality (physics) 030220 oncology & carcinogenesis Statistics Medicine Humans Radiology Nuclear Medicine and imaging business Radiation attenuation |
| ISSN: | 1078-8174 |
| Popis: | Introduction\ud Mattresses in the radiology department tend to be an overlooked aspect of imaging equipment. This\ud paper evaluates the radiation attenuation characteristics of mattresses and the effect they have on\ud image quality.\ud \ud Method\ud Thirteen mattresses (from new to 20 years of age) were evaluated. Incident air kerma (IAK) was\ud measured in two conditions, with and without mattress over a range of exposure factors using a\ud digital dosimeter. The percentage change was calculated and applied to the set mAs to illustrate the\ud “effective mAs” delivered to an image receptor. Image quality was assessed by calculating the\ud inverse image quality factor (IQFinv) using a commercially available phantom (CDRAD) for the same\ud exposure factors. The correlation of age and attenuation and image quality was calculated.\ud \ud Results\ud Measured IAK and image quality was affected by the addition of a mattress. IAK decreased due to\ud attenuation and IQFinv indicated worse image quality. IAK correlated negatively with mattress age\ud indicating that older mattresses have higher attenuation properties. The clinical impact for radiation\ud increase was insignificant as it resulted in an average of 0.05 change in mAs. There was no\ud correlation between age and image quality.\ud \ud Conclusion\ud The results indicate that while the presence of a mattress does impact on transmitted radiation and\ud the quality of the image, the clinical impact is insignificant. Attenuation correlates with age but with\ud no clinical significance. There is no correlation between age and image quality.\ud Implications for practice\ud Quality control tests for attenuation and impact on image quality are not required in clinical\ud practice. The method could be used by manufacturers to test new materials and mattresses and\ud could provide users with specifications of new products. |
| Databáze: | OpenAIRE |
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