动静脉畸形, CT血管成像, 　血管构筑, 　介入治疗, 　无水乙醇

Objective To explore an accurate and effective examination method for arteriovenous malformation （AVM）vascular construction on the body surface， in order to guide the preoperative evaluation and the selection of treatment.Methods From September 2022 to September 2024， a total of 67 patients with body surface AVM were enrolled. Computed tomography angiography （CTA） was performed before treatment， Philips CT 6000 spiral CT was used for scanning， PHILIPS IntelliSpace Portal workstation was used for image post-processing， maximum density projection （MIP） and surface masking method reconstruction （SSD） were performed. Combined with the original image observation， the corresponding treatment plan was selected according to the vascular construction. Results CTA images of 67 patients with surface AVM showed abnormal blood vessels and their anatomical relationship with surrounding tissues， as well as the condition of adjacent bones. The patients were classified according to the Yakes classification criteria：6 patients showed Yakes type Ⅰ；28 cases showed Yakes type Ⅱa；4 patients showed Yakes type Ⅱb；4 patients showed Yakes type Ⅲa；10 cases showed Yakes type Ⅲb；11 patients showed Yakes type Ⅳ ；4 patients could not be classified into a particular category. Based on the vascular architecture characteristics of the lesion area shown by the patient's CTA images， the corresponding treatment plan was designed， including interstitial injection therapy in 4 cases， surgical treatment in 16 cases， interventional treatment with absolute ethanol in 36 cases and combination therapy in 11 cases. Conclusion CTA examination can obtain accurate and  clear vascular images of AVM lesions on the body surface， which has important clinical guiding significance for preoperative evaluation and treatment plan design

Arteriovenous malformations, Computed tomography angiography, Vascular construction, Sclerotherapy,