| HE Ying_hui,HAN Yue_dong,GAO Kai.The experimental study of the optimized kVp and it's relationships with the surface dose of phantom and the phantom thickness[J].Chinese Journal of Radiological Medicine and Protection,2006,26(3):275-277 |
| The experimental study of the optimized kVp and it's relationships with the surface dose of phantom and the phantom thickness |
| Received:September 02, 2005 |
| DOI： |
| KeyWords:Phantom Surface dose Thickness Signal to noise ratio X-ray tube voltage (kVp) |
| FundProject:国家“十五863”基金资助项目(2001AA114152);国家自然科学基金项目(60472004) |
| Author Name | Affiliation | E-mail | | HE Ying_hui | Department of Radiology, Xijing hospital, Xi_an 710032, China | slj@fmmu.edu.cn | | HAN Yue_dong | Department of Radiology, Xijing hospital, Xi_an 710032, China | | | GAO Kai | Department of Radiology, Xijing hospital, Xi_an 710032, China | | | 邓振生 | Department of Radiology, Xijing hospital, Xi_an 710032, China | | | 余厚军 | Department of Radiology, Xijing hospital, Xi_an 710032, China | | | 牟轩沁 | 西安交通大学图像处理与模式识别研究所 | | | 任东青 | 第四军医大学放射医学教研室 | | | 孙立军 | Department of Radiology, Xijing hospital, Xi_an 710032, China | |
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| Abstract:: |
| Objective To investigate the relationships of X-ray tube voltage (kVp) with surface dose of the phantom and phantom-thickness on the basis of the particular signal to noise ratio of X-ray images. Methods X-ray digital subtraction angiography was simulated using a phantom made of acrylic acids. Under the particular surface dose of X-ray image intensifier, the curve of the surface doses of phantom surface-kVp and the curve of the phantom thickness-kVp were acquired with different exposure combinations of kVp and mAs. Results According to the curve of the surface dose of phantom-kVp, it suggestsd that the gradual increase in kVp corresponded to the gradually decreased surface dose of phantom, with the slope tending to zero. However, the gradual increased phantom thickness corresponded to the gradually increased kVp on the basis of the curve of the phantom thickness-kVp, with the presentation of kVp=64+0.89D (phantom thickness, cm) between the phantom thickness and kVp. Conclusion The graduall increased in kVp might result in the gradual decrease in surface dose of phantom, the optimized kVp relating directly to the phantom thickness. |
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