低剂量间接法CT静脉成像在下肢静脉曲张中的价值研究

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Abstract Objective: To investigate the clinical value of indirect CT venography(CTV) in varicose veins(VV) of lower limbs. Methods: This retrospective study has been approved by the hospital institutional review board. Thirty-seven patients（F/M, 21/16, age range 29~65 years) diagnosed as VV were recruited in this study, and they were performed with indirect CTV in lower limbs. Two radiologists reviewed all the images, including axial, MPR and 3D volume rendering(VR). Quantitative indexes were compared, including signal intensity(SI) of great saphenous vein(GSV) and VV, the signal-to-noise ratio(SNR) and contrast-to-noise ratio(CNR). While subjective indexes were performed with a 3-point scale. Perforator veins larger than 2 mm were marked, and statistical analysis was performed. Results: All GSV were demonstrated in 37 patients, including 23 unilateral and 14 bilateral VV. Quantitative indexes demonstrate no statistical significance between the proximal point in GSV and VV, including SI, SNR and CNR(119±17.2 vs. 123.4±21.4), (9.31±2.68 vs. 9.52±3.22), (3.98±1.99 vs. 4.06±2.17), respectively. For subjective image quality, 27(73.0%) were excellent, 9(24.3%) fair and 1(2.7%) poor. Fourteen perforator veins were detected, and the mean diameter of perforator veins marked by CTV was (2.97±0.92) mm, which were ligated during the surgery thereafter. Conclusion: Indirect CTV demonstrates feasibility in diagnosis of VV in lower extremities, especially for perforating veins, which is important for preoperative assessment.

Key words： Varicose veins Lower extremity Tomography, X-ray computed Phlebography

Received: 06 June 2017

PACS:	Ｒ543.6
	Ｒ814.42
	R814.43

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	Articles by authors
	ZHAO Fei1
	LIU Yi1
	DONG Jian2

Cite this article:

ZHAO Fei1,LIU Yi1,DONG Jian2. Indirect CT venography in varicose vein of lower limbs: a retrospective study[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2018, 29(3): 182-185.

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http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2018/V29/I3/182

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