scholarly journals Comparison of Doppler Ultrasound and Digital Subtraction Angiography in extracranial stenosis

2021 ◽  
pp. 103202
Author(s):  
Seyed Farzad Maroufi ◽  
Seyedeh Niloufar Rafiee Alavi ◽  
Mohammad Hossein Abbasi ◽  
Ali Famouri ◽  
Mahya naderkhani ◽  
...  
Keyword(s):  
Digital Subtraction Angiography ◽  
Doppler Ultrasound ◽  
Digital Subtraction ◽  
Extracranial Stenosis

Angio-RM dei tronchi sovraortici

1997 ◽  
Vol 10 (2_suppl) ◽  
pp. 91-92
Author(s):  
N. Anzalone
Keyword(s):  
Digital Subtraction Angiography ◽  
Doppler Ultrasound ◽  
Mr Angiography ◽  
Digital Subtraction ◽  
Complex Flow ◽  
Vessel Morphology ◽  
Diagnostic Potential ◽  
Intracranial Arteries ◽  
Almost All ◽  
Technical Considerations

Several studies have been published on the usefulness of MR angiography of carotid bifurcations and epiaortic vessels. Almost all of them were carried out with the Time-of-Flight technique, most of them using the 2D acquisition modality. These studies claim a good overall sensitivity and specificity by comparison to digital subtraction angiography, Doppler ultrasound or both in the demonstration of carotid clinically relevant stenosis, with a slight overestimation of the degree of stenosis, especially in the moderate and severe groups. Unlike Doppler ultrasound, distal cervical and proximal intracranial arteries can be relatively well evaluated by MR angiography. Nevertheless, MR angiography also has limitations, among the best known, difficult visualization of the origin of neck arteries, inaccurate depiction of vessel morphology in case of complex flow and unreliable quantification of the degree of stenosis have to be mentioned. To get the most of the diagnostic potential of MR angiography, imaging strategies and technical considerations have to be adapted to the morphological and hemodynamic particularities of the different segments of the supraaortic arterial structures.

scholarly journals Vector Flow Imaging Compared with Digital Subtraction Angiography for Stenosis Assessment in the Superficial Femoral Artery – A Study of Vector Concentration, Velocity Ratio and Stenosis Degree Percentage

2019 ◽  
Vol 05 (02) ◽  
pp. E53-E59 ◽  
Author(s):  
Kristoffer Hansen ◽  
Peter Hansen ◽  
Caroline Ewertsen ◽  
Lars Lönn ◽  
Jørgen Jensen ◽  
...  
Keyword(s):  
Digital Subtraction Angiography ◽  
Doppler Ultrasound ◽  
Femoral Artery ◽  
Superficial Femoral Artery ◽  
Velocity Ratio ◽  
Arterial Disease ◽  
Disease Assessment ◽  
Imaging Method ◽  
Flow Imaging ◽  
Digital Subtraction

AbstractStenosis of the superficial femoral artery (SFA) induces complex blood flow with increased velocities. Disease assessment is performed with Doppler ultrasound and digital subtraction angiography (DSA), but Doppler ultrasound is limited by angle dependency and DSA by ionizing radiation. An alternative is the vector flow imaging method based on transverse oscillation (TO), an angle-independent vector velocity technique using ultrasound. In this study, flow complexity and velocity measured with TO were compared with DSA for the assessment of stenosis in the SFA.The vector concentration, a measure of flow complexity, and the velocity ratio obtained from the stenosis and a disease-free adjacent vessel segment, were estimated with TO in 11 patients with a total of 16 stenoses of the SFA. TO data were compared with the corresponding stenosis degree percentage obtained with DSA.The correlation between the vector concentration and DSA was very strong (R=0.93; p<0.001; 95% confidence interval (CI): 0.81–0.98), while only moderate for velocity ratio and DSA (R=0.50; p<0.07; 95% CI: 0.00–0.80). The correlation coefficients that were found were significantly different (p<0.005) without overlapping CI.The study indicated that flow changes in the SFA induced by stenosis can be quantified with TO, and that stenosis grading may be improved by estimation of flow complexity instead of velocity ratio. TO is a potential diagnostic tool for the assessment of atherosclerosis and peripheral arterial disease.

Cystic artery pseudoaneurysm due to carcinoma of the gallbladder

2021 ◽  
Vol 14 (6) ◽  
pp. e241714
Author(s):  
Sudharshan Mahalingam ◽  
Oseen Hajilal Shaikh ◽  
Uday Shamrao Kumbhar ◽  
Amuthabharathi Mohan
Keyword(s):  
Abdominal Pain ◽  
Digital Subtraction Angiography ◽  
Doppler Ultrasound ◽  
Cystic Artery ◽  
Digital Subtraction ◽  
Cyanoacrylate Glue ◽  
Artery Pseudoaneurysm ◽  
Carcinoma Of The Gallbladder ◽  
Upper Gastrointestinal Bleed ◽  
Upper Gastrointestinal

A 52-year-old man, with known case of hypertension and stroke, presented to us with an upper gastrointestinal bleed and abdominal pain. Ultrasonography of the abdomen showed haematoma within the gallbladder (GB), and Doppler ultrasound was suggestive of an aneurysm arising from the cystic artery (CA). CT of the abdomen showed a well-enhancing thick-walled GB suggestive of malignancy. It also showed the presence of a double CA along with an aneurysm of one of the cystic arteries, haematoma within the GB and haemoperitoneum. Digital subtraction angiography confirmed the presence of double CA and CA pseudoaneurysm. The CA was selective catheterised and embolised with N-butyl cyanoacrylate glue. The patient underwent extended radical cholecystectomy later and was reported to have adenocarcinoma of the GB.

Digital subtraction angiography in head & neck diseases

1985 ◽  
Vol 21 (3) ◽  
pp. 384
Author(s):  
M C Han ◽  
J B Lee ◽  
K H Chang
Keyword(s):  
Digital Subtraction Angiography ◽  
Digital Subtraction ◽  
Head Neck
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