The application of combined venography in the diagnosis of iliac vein compression syndrome with dual-source CT / 实用放射学杂志

ABSTRACT

Objective To explore the clinical value of the combined dual-source CT venography(CTV)for the diagnosis of iliac vein compression syndrome(IVCS).Methods 43 patients with clinically suspected IVCS underwent CTV examination.Among them,22 cases were assessed with combined CTV while 21 cases were given conventionally indirect CTV.The lower extremity deep vein was scanned from foot to head.The dual-energy technology was applied for data acquisition.Results Two kinds of CTV methods could be used directly for diagnosing IVCS and checking the asymptomatic mild iliac vein compression.32 IVCS patients were diagnosed by CTV.In 27 cases with deep venous thrombosis(DVT),the average diameter of the left iliac vein was(3.23 ± 1.45)mm and the average compression rate was 67%.The differences were statistically significant in comparisons of the average diameter of left iliac vein between IVCS patients with or without DVT and patients without IVCS.The image quality scores of bidirectional CTV were higher than indirect CTV with statistically significant difference.Conclusion Combined CTV is a feasible technique for lower extremity venography.The image quality of combined CTV is better than conventional indirect CTV with greater clinical value.