张挽时 1杨琪放 1孟利民 1郭和清 2严景民 2刘红明2
作者信息
- 1. 空军总医院CT&MR室,北京100142
- 2. 空军总医院泌尿外科,北京100142
- 折叠
摘要
Abstract
Objective To evaluate the ability of dual-source dual-energy CT to differentiate urinary stone of different compositions in vivo. Methods Sixty-four patients with known urinary stone disease were scanned using a DSCT scanner in the dual-energy mode. Hounsfield units (HU) of each stone were recorded for the 80 kV and the 140 kV datasets by hand-drawing method. HU difference, HU ratio and DEI were calculated. Urinary stones were classified as UA stones, mixed UA stones, cystine stones and calcium stones based on dual energy software, the results compared with the infrared spectroscopy analysis of stone samples. Use one-way ANOVA to compare HU difference, HU ratio and DEI of different stones groups according to infrared spectroscopy. Results In 55 patients, stones were sampled. Dual energy software correctly characterized 4 UA stones, 1 mixed UA stone, 2 cystine stone, and 42 calcium stones. 4 struvite stones, 1 mixed ammonium uratc and calcium stone, 1 mixed UA stone were classified as calcium stones. Statistical differences in HU difference (18±12), (214±21), (329±35), (360±49), (458±97) and (497±110) HU respectively, HU ratio (1.04±0.02, l.36±0.02, 1.49±0.04, 1.50±0.08. 1.52±0.05 and 1.53±0.04 respectively), and DEI (0.006±0.004, 0.062±0.002, 0.089±0.006, 0.095±0.0l3, 0.107±0.011 and 0.112±0.012 respectively) among UA stones, cystine stone, stravite stones, CaP stones, CaOx stones and mix calcium stones (P<0.001). There were statistical differences in HU difference, HU ratio and DEI between UA stones and ihe other groups, in HU ratio and DEI between cystine stones and the other groups, in HU difference and DEI between struvite stones and CaOx or mix calcium stones, in HU difference between cystine stones and CaOx or mix calcium stones, in DEI
between CaP stones and mix calcium stones (P<0.05). Conclusion Dual-source dual-energy CT has the ability to differentiate UA stones, cystine stones, mixed UA stones and calcium stones in vivo, but it could not distinguish struvite stones and subtypes of calcium stones.
关键词
双源CT/双能量成像/体层摄影术/X线计算机/泌尿系结石/红外光谱学Key words
Dual Source CT/ Dual Energy Imaging/ Tomography. X-ray computed/ Urinary stone/ Infrared Spectroscopy
分类
机械制造
