多层螺旋CT仿真内窥镜用于主动脉夹层

The Applicaton of Multislice Spiral CT and CT Virtual Endoscopy in the Diagnosis of Aortic Dissection

目的 :通过 5例主动脉夹层的多层螺旋CT(MSCT)和CT仿真内镜 (CTVE)表现 ,探讨CTVE技术在主动脉夹层诊断中的价值。方法 :对 5例主动脉夹层进行MSCT增强扫描 ,将原始数据在AW工作站上进行CTVE成像。 5例中Ⅰ型主动脉夹层 2例 ;Ⅱ型主动脉夹层 1例 ;Ⅲ型主动脉夹层 2例。结果 :2例Ⅰ型和 2例Ⅲ型主动脉夹层均清楚地显示了狭窄的真腔和扩张的假腔 ,以及假腔内的血栓 ,主动脉夹层的部位、范围和分支受侵情况。清晰地显示 1例Ⅱ型主动脉夹层的内膜裂缝。结论 :CTVE技术是一种无创伤、无痛苦 ,快捷、安全、有效的检查技术 ,是诊断主动脉夹层有价值的检查方法之一。

Objective:To evaluate the application of multislice spiral CT (MSCT) and CT virtual endoscopy (CTVE) in the diagnosis of aortic dissection (AD).Methods:5 cases of AD were examed by means of enhanced MSCT scan,and then the raw data were transferred to the AW 4.0 workstation so as to reconstruct CTVE images.2 cases with typeⅠ,1 cases with typeⅡ and 2 cases with type Ⅲ were shown on CTVE.Results:The narrow real cavities and dilated false cavities were displayed clearly in 2 cases of type Ⅰ and 2 cases of type Ⅲ aortic dissection.Thrombosis inside the false cavities and the location,extension and arterial branches involvement of AD were also manifested.The intimal tear in 1 case of type Ⅱ was shown definitely in the CTVE images.Conclusion:Due to the non-invasiveness,painlessness,convenience,and safety of this examination,MSCT and CTVE should be the first choice for the detection of AD.