| 李道伟,郭文力,卢再鸣,乞文旭,郭启勇.双源CT双能量减影诊断下肢血管疾病[J].中国医学影像技术,2009,25(10):1806~1809 |
| 双源CT双能量减影诊断下肢血管疾病 |
| Application of energy subtract angiography of dual source CT in diagnosis of arterial diseases of the lower extremities |
| 投稿时间：2009-02-26 修订日期：2009-05-27 |
| DOI： |
| 中文关键词: 下肢动脉闭塞症 体层摄影术,X线计算机 血管造影术,数字减影 |
| 英文关键词:Lower extremity arterial occlusive diseases Tomography, X-ray computed Angiography, digital subtraction |
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| 中文摘要: |
| 目的 探讨双源CT(DSCT)血管能量减影技术在下肢动脉疾病诊断中的应用价值。方法 对32例下肢动脉闭塞性病变患者行双源CT直接去骨CTA(DE-BR-CTA)检查,经工作站减影处理,获取容积再现及最大密度投影图像,其后2周内行数字减影血管造影(DSA)检查。以DSA为标准,由2名有经验的放射科医生评价DE-BR-CTA图像的动脉血管可见度及血管狭窄程度,并对其进行统计学分析。结果 两种成像方法有较好的一致性,DE-BR-CTA与DSA图像的血管可见度差异无统计学意义(P＞0.05),以 DSA 为标准评价32例被检查者328个节段中,12个偏心性狭窄节段被DE-BR-CTA 高估,6个节段狭窄程度被低估。DE-BR-CTA对下肢动脉狭窄或闭塞狭窄程度≥10%的诊断准确性为94.51%,敏感性96.15%,特异性93.02%,阳性预测值92.59%,阴性预测值96.39%。结论 DSCT能量减影血管成像技术是一种准确的、非侵袭性的检查方法,可为术前评价和筛选下肢动脉疾病提供可靠的参考依据。 |
| 英文摘要: |
| Objective To observe the value of dual source CT (DSCT) dual energy subtract method in diagnosis of lower extremity arterial occlusion. Methods Thirty-two patients with lower extremity arterial occlusive diseases underwent DSCT direct bone removal CT angiography (DE-BR-CTA) and digital subtraction angiography (DSA) within 2 weeks. Raw data were reconstructed with techniques including MIP and VR. Arterial visibility of DE-BR-CTA was analyzed by two experienced radiologists taking DSA as the standard. Results A total of 328 arterial segments were selected in 32 patients with lower extremity arterial occlusive diseases. The correlation between DSA and DE-BR-CTA was good. There was no significant difference in arterial visibility between DE-BR-CTA and DSA (P＞0.05). Compared with DSA, 12 of the segmental stenosis were "overestimated" and 6 were underestimated with DE-BR-CTA. When stenosis was over 10%, the accuracy, sensitivity, specificity, positive predictive value and negative predictive value of DE-BR-CTA was 94.51%, 96.15%, 93.02%, 92.59% and 96.39%, respectively. Conclusion DSCT energy subtraction angiography is an accurate diagnostic method and non-invasive imaging technology in the assessment of lower extremity arterial occlusive diseases. It may provide precious information for pre-surgery evaluation and screening the arterial diseases of the lower extremities. |
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