CAJ | 학술논문

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.
목적 탐토쌍원CT(DSCT)혈관능량감영기술재하지동맥질병진단중적응용개치.방법 대32례하지동맥폐새성병변환자행쌍원CT직접거골CTA(DE-BR-CTA)검사,경공작참감영처리,획취용적재현급최대밀도투영도상,기후2주내행수자감영혈관조영(DSA)검사.이DSA위표준,유2명유경험적방사과의생평개DE-BR-CTA도상적동맥혈관가견도급혈관협착정도,병대기진행통계학분석.결과 량충성상방법유교호적일치성,DE-BR-CTA여DSA도상적혈관가견도차이무통계학의의(P＞0.05),이 DSA 위표준평개32례피검사자328개절단중,12개편심성협착절단피DE-BR-CTA 고고,6개절단협착정도피저고.DE-BR-CTA대하지동맥협착혹폐새협착정도≥10%적진단준학성위94.51%,민감성96.15%,특이성93.02%,양성예측치92.59%,음성예측치96.39%.결론 DSCT능량감영혈관성상기술시일충준학적、비침습성적검사방법,가위술전평개화사선하지동맥질병제공가고적삼고의거.
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.