| 李道伟,郭文力,卢再鸣,郭启勇.体部血管双源CT能量减影成像与传统3D血管成像比较[J].中国医学影像技术,2010,26(2):361~364 |
| 体部血管双源CT能量减影成像与传统3D血管成像比较 |
| Comparison of body artery imaging between dual-energy CT angiography and traditional 3D CT angiography |
| 投稿时间：2009-08-25 修订日期：2009-10-25 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 能量减影 体部血管 |
| 英文关键词:Tomography, X-ray computed Energy subtraction Body artery |
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| 摘要点击次数: 4676 |
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| 中文摘要: |
| 目的 评估双源CT(DSCT)能量减影成像所需时间、图像质量及其对血管狭窄闭塞诊断的效能。方法 23例临床疑诊体部血管疾病患者接受DSCT血管造影(DE-CTA)检查,对所获数据在双能软件中进行自动去骨(ABS)去除斑块后行手动去除残余骨质(ABPS),对融合数据在常规3D软件中行自动去骨(ABR),去骨后手动去除残余骨质(ABR-M)。行最大密度投影(MIP)及多平面重组(MPR)重建,比较ABR与ABS的图像残余骨情况、ABPS和ABR-M后处理操作时间及动脉血管可见度情况;并以MPR及原始图像综合诊断结果为标准,比较两种血管成像方法对血管狭窄程度≥50%节段诊断的敏感度、特异度。结果 ABR图像总体去骨效果好于ABS(P<0.05);ABPS所需后处理时间 少于ABR-M所需时间 ,差异有统计学意义(P<0.05)。共325个节段用于评价血管狭窄程度,ABPS与ABR-B对狭窄程度≥50%节段的诊断敏感度、特异度分别为95.74%、96.19%和92.93%、97.87%。结论 双源CT能量减影成像去骨、去斑块后图像质量较好,对血管狭窄的诊断较为准确,后处理所耗时间少于传统3D方法。 |
| 英文摘要: |
| Objective To evaluate the effect of automatic bone and plaque removal on image quality and grading of steno-occlusive lesions in patients undergoing dual energy CT angiography (DE-CTA) of body artery. Methods DE-CTA was performed in 23 patients with suspected body vascular disease. Separate datasets were calculated for each of the two tubes and used to generate automatically bone-subtracted images (ABS) as well as additional manual bone removes after plaque subtracted images (ABPS). In addition, a weighted average dataset from both dual energy acquisitions resembling routine 3D CT acquisition was used for automatic bone remove (ABR). Residual bone in the ABR dataset was removed manually (ABR-M). Operator time for bone removal was measured, while effectiveness of bone subtraction and the time needed of ABPS and ABR-M was assessed. Compared with MPR, ABR images and stenosis grading in plaque subtracted were assessed with two radiologists. Results The imaging quality of ABR was superior to that of ABS (P<0.05). The time needed of ABPS was (7.8±4.3) min, significantly lower than that of ABR-M (11.4 min±2.5 min, P<0.05). A total of 325 steno-occlusive lesions were assessed. The sensitivity, specificity of DE-CTA and traditional 3D CTA was 95.74%, 96.19% and 92.93%, 97.87%, respectively. Conclusion The imaging quality is good after automatic bone and plaque subtraction of DE-CTA. Automatic plaque subtraction for the first time provides a true CTA imaging which is easy to interpret and reduces the need for further post-processing. The diagnosis of vascular stenosis with DE-CTA is also accurate, and the time spent in post-processing is less than that of traditional 3D angiography. |
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