The utility of superb‐microvascular imaging for evaluating the full length of carotid artery stents

2019 ◽  
Vol 47 (4) ◽  
pp. 239-242
Author(s):  
Yuta Hagiwara ◽  
Takahiro Shimizu ◽  
Masashi Hoshino ◽  
Naoki Takao ◽  
Takashi Araga ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Full Length ◽  
Superb Microvascular Imaging ◽  
Microvascular Imaging ◽  
Carotid Artery Stents

Superb microvascular imaging assessment of restenosis after carotid artery stenting: a case report

Choonpa Igaku ◽  
2016 ◽  
Vol 43 (2) ◽  
pp. 317-318
Author(s):  
Yutaka SASAKI ◽  
Hiroki MATSUBARA ◽  
Mayo HATTORI ◽  
Saryong KIM ◽  
Kyosuke TAKESHITA
Keyword(s):  
Case Report ◽  
Carotid Artery ◽  
Carotid Artery Stenting ◽  
Superb Microvascular Imaging ◽  
Microvascular Imaging

scholarly journals Superb Microvascular Imaging Ultrasound for Cervical Carotid Artery Stenosis for Prediction of the Development of Microembolic Signals on Transcranial Doppler during Carotid Exposure in Endarterectomy

2021 ◽  
pp. 61-68
Author(s):  
Takayuki Chiba ◽  
Shunrou Fujiwara ◽  
Kazumasa Oura ◽  
Kohki Oikawa ◽  
Kokei Chida ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Transcranial Doppler ◽  
Carotid Artery Stenosis ◽  
Carotid Plaque ◽  
Carotid Arteries ◽  
Artery Stenosis ◽  
Neurological Deficits ◽  
Artery Embolism ◽  
Superb Microvascular Imaging ◽  
Microvascular Imaging

<b><i>Introduction:</i></b> During exposure of the carotid arteries, embolism from the surgical site is recognized as a primary cause of neurological deficits or new cerebral ischemic lesions following carotid endarterectomy (CEA), and associations have been reported between histological neovascularization in the carotid plaque and both plaque vulnerability and the development of artery-to-artery embolism. Superb microvascular imaging (SMI) enables accurate visualization of neovessels in the carotid plaque without the use of intravenous contrast. This study aimed to determine whether preoperative SMI ultrasound for cervical carotid artery stenosis predicts the development of microembolic signals (MES) on transcranial Doppler (TCD) during exposure of the carotid arteries in CEA. <b><i>Methods:</i></b> Preoperative cervical carotid artery SMI ultrasound followed by CEA under TCD monitoring of MES in the ipsilateral middle cerebral artery was conducted in 70 patients previously diagnosed with internal carotid artery stenosis (defined as ≥70%). First, observers visually identified intraplaque microvascular flow (IMVF) signals as moving enhancements located near the surface of the carotid plaque within the plaque on SMI ultrasonograms. Next, regions of interest (ROI) were manually placed at the identified IMVF signals (or at arbitrary places within the plaque when no IMVF signals were identified within the carotid plaque) and the carotid lumen, and time-intensity curves of the IMVF signal and lumen ROI were generated. Ten heartbeat cycles of both time-intensity curves were segmented into each heartbeat cycle based on gated electrocardiogram findings and averaged with respect to the IMVF signal and lumen ROI. The difference between the maximum and minimum intensities (ID) was calculated based on the averaged IMVF signal (ID<sub>IMVF</sub>) and lumen (ID<sub>l</sub>) curves. Finally, the ratio of ID<sub>IMVF</sub> to ID<sub>l</sub> was calculated. <b><i>Results:</i></b> MES during exposure of the carotid arteries were detected in 17 patients (24%). The incidence of identification of IMVF signals was significantly greater in patients with MES (94%) than in those without (57%; <i>p</i> = 0.0067). The ID<sub>IMVF</sub>/ID<sub>l</sub> ratio was significantly greater in patients with MES (0.108 ± 0.120) than in those without (0.017 ± 0.042; <i>p</i> &#x3c; 0.0001). The specificity and positive predictive value for the ID<sub>IMVF</sub>/ID<sub>l</sub> ratio for prediction of the development of MES were significantly higher than those for the identification of IMVF signals. Logistic regression analysis revealed that only the ID<sub>IMVF</sub>/ID<sub>l</sub> ratio was significantly associated with the development of MES (95% CI 101.1–3,628.9; <i>p</i> = 0.0048). <b><i>Conclusion:</i></b> Preoperative cervical carotid artery SMI ultrasound predicts the development of MES on TCD during exposure of the carotid arteries in CEA.

scholarly journals The diagnostic value of Superb Microvascular Imaging in identifying benign tumors of parotid gland

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Lihui Zhao ◽  
Yiran Mao ◽  
Jie Mu ◽  
Jing Zhao ◽  
Fangxuan Li ◽  
...  
Keyword(s):  
Differential Diagnosis ◽  
Parotid Gland ◽  
Color Doppler ◽  
Benign Tumors ◽  
Color Doppler Flow Imaging ◽  
Cell Adenoma ◽  
Mixed Distribution ◽  
Superb Microvascular Imaging ◽  
Grade 3 ◽  
Microvascular Imaging

Abstract Background We compared the ultrasound features, superb microvascular imaging (SMI) and micro vessel density (MVD) of pleomorphic adenoma (PA), Warthin’s tumor (WT) and basal cell adenoma (BCA) to explore the clinic value of SMI in differential diagnosis of benign tumors of parotid gland. Methods The vascular distributions and grade by color doppler flow imaging (CDFI) and SMI, as well as vascular index (VI) of 249 parotid gland masses from 217 patients were analyzed. Results The internal echogenicity of BCA are more homogeneous in comparing with WT and PA(P < 0.05). By SMI, the vascular distribution and vascular grade in PA were mainly peripheral (33.1%) and avascular (25.7%), Grade 1 (27.8%) and Grade 0 (25.7%). WT were mainly central (31.3%) and mixed distribution (34.9%), in Grade 3 (37.3%) and Grade 2 (36.2%). BCA was mainly peripheral (33.3%) and mixed distribution (33.3%), in Grade 2 (33.3%) and Grade 3 (33.3%). The overall detection rate of SMI for vascular Grade 2 and 3 was significantly higher than that of CDFI (P < 0.05). Both VI and MVD were lowest in PA, highest in WT (P < 0.001). The VI by SMI was correlated with MVD (P < 0.001). The correlation index between vascular distribution and grade by SMI and MVD were significantly higher than CDFI. Conclusion SMI can provide low-velocity blood flow information, which is helpful for the differential diagnosis of common benign tumors of parotid gland, and is expected to be more widely used.

Characterization of Placental Microvasculature Using Superb Microvascular Imaging

2019 ◽  
Vol 38 (9) ◽  
pp. 2485-2491 ◽  
Author(s):  
Lauren M. Mack ◽  
Joan M. Mastrobattista ◽  
Rajshi Gandhi ◽  
Eumenia C. Castro ◽  
Angela P.H. Burgess ◽  
...  
Keyword(s):  
Superb Microvascular Imaging ◽  
Microvascular Imaging
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