Superb microvascular imaging (SMI) reduces motion artifacts significantly and allows visualization of low-velocity blood flow in vessels; thus, thrombi are clearly demonstrated compared to conventional B-mode and color Doppler imaging. Ultrasonographic images of the lower extremities of a 69-year-old woman with acute ischemic stroke complicated with deep vein thrombosis (DVT) are presented. Because SMI allows visualization of low-velocity blood flow, echo contrast between the thrombus and the surrounding flow makes it possible to clearly visualize the thrombus. SMI is a useful method to evaluate DVT, especially early after thrombus formation when it is difficult to delineate size and length because of echolucency.
Superb microvascular imaging Venous thromboembolism Deep vein thrombosis Compression ultrasound technique Ultrasound examination of the lower extremities
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YH: study concept, data acquisition, analysis and interpretation. RS: data acquisition. TS: data acquisition. KS: data acquisition. CH: data acquisition. MM: data acquisition. TO: data acquisition. MS: data acquisition. HA: study supervision. YH: critical revision of the manuscript for important intellectual content, study supervision.
Compliance with ethical standards
All procedures followed were approved by the St. Marianna University Bioethics Committee and performed in accordance with the Helsinki Declaration of 1964 and later versions. Informed consent was obtained from the patient for inclusion in this study.
Conflict of interest
The authors have no conflicts of interest to declare.
Supplementary material 1 (MP4 85759 kb)
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