scholarly journals Improved visualization of medium vessel occlusion stroke with time-variant color-coded multiphase CT angiography maps: A technical note

2021 ◽  
Vol 1 (1-2) ◽  
pp. 100003
Author(s):  
Johanna M. Ospel ◽  
Mayank Goyal
Keyword(s):  
Ct Angiography ◽  
Technical Note ◽  
Vessel Occlusion ◽  
Multiphase Ct

Detecting Large Vessel Occlusion at Multiphase CT Angiography by Using a Deep Convolutional Neural Network

Radiology ◽  
2020 ◽  
Vol 297 (3) ◽  
pp. 640-649 ◽  
Author(s):  
Matthew T. Stib ◽  
Justin Vasquez ◽  
Mary P. Dong ◽  
Yun Ho Kim ◽  
Sumera S. Subzwari ◽  
...  
Keyword(s):  
Neural Network ◽  
Convolutional Neural Network ◽  
Ct Angiography ◽  
Deep Convolutional Neural Network ◽  
Large Vessel ◽  
Large Vessel Occlusion ◽  
Vessel Occlusion ◽  
Multiphase Ct

Effects of multiphase versus single-phase CT angiography for the detection of distal cerebral vessel occlusion

2021 ◽  
Author(s):  
Gerald M. Hefferman ◽  
Grayson L. Baird ◽  
David W. Swenson ◽  
Robert C. Ward ◽  
Mahesh V. Jayaraman ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Single Phase ◽  
Vessel Occlusion ◽  
Cerebral Vessel

scholarly journals Early detection of large‐vessel occlusion stroke after cardiac surgery using CT angiography leading to early recanalization with endovascular thrombectomy

2021 ◽  
Vol 9 (5) ◽  
Author(s):  
Kiyoshi Takemoto ◽  
Masaaki Sakuraya ◽  
Michitaka Nakamura ◽  
Hidetsugu Maekawa ◽  
Kazuo Yamanaka ◽  
...  
Keyword(s):  
Cardiac Surgery ◽  
Early Detection ◽  
Ct Angiography ◽  
Large Vessel ◽  
Large Vessel Occlusion ◽  
Vessel Occlusion ◽  
Endovascular Thrombectomy

Abstract W P37: Accuracy Of CT Angiography In The Localization Of Carotid Occlusion Sites In Acute Ischemic Stroke

Stroke ◽  
2015 ◽  
Vol 46 (suppl_1) ◽  
Author(s):  
Marcelo Rocha ◽  
William T Delfyett ◽  
Amin Aghaebrahim ◽  
Ashutosh Jadhav ◽  
Tudor Jovin
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Ct Angiography ◽  
Target Lesion ◽  
Carotid Occlusion ◽  
Conventional Angiography ◽  
Vessel Occlusion ◽  
Cerebral Vessel ◽  
Ct Angiogram ◽  
Comprehensive Stroke Center

Background and Purpose: CT angiography yields rapid detection of a major cerebral vessel occlusion during the evaluation of patients with acute ischemic stroke leading to its widespread use in rapidly triaging for IA trial enrollment. In such trials, patients who have an extracranial carotid occlusion in tandem to the intracranial target lesion are typically excluded. However, ICA terminus occlusions may be misidentified as cervical carotid occlusions on CTA. The goal of this study is to determine the accuracy of CTA in identifying ICA terminus occlusions from tandem carotid occlusions (cervical and intracranial segments). Methods: Retrospective review of a prospectively maintained database containing patients treated at our comprehensive stroke center between 1996 and 2014 in whom catheter angiogram and CT angiogram were available on PACS. A Neuroradiologist, blinded to catheter angiographic results reviewed the CT angiography identifying the presence of intracranial stenoses and concomitant cervical carotid occlusions. Results: Of 196 patients presenting with intracranial carotid occlusions on catheter based angiogram, 101 patients were identified with good quality CT angiography and subsequent catheter angiograms. Mean ages for identified patients was 65 +/- 14, of which 52% women and 48% men. Forty-four percent of patients had an ASPECT score of 9-10. The overall rate of agreement between retrospective CTA and conventional angiography readings was 77%. Of 72 isolated intracranial occlusions on conventional angiography, CT angiography misidentified 23 cervical carotid occlusions. The sensitivity of CTA for detecting isolated carotid terminus occlusion was 68% in this cohort. Specific factors associated with CT and catheter based angiographic discrepancy are reviewed. Conclusions: The study raises systematic considerations for maximizing inclusion of patients with target arterial occlusions who are most likely to benefit from intra-arterial therapy in future clinical trials. Future steps will include determination of specificity, predictive value of CTA for localization of specific carotid occlusion sites. Clinical variables associated with lower CTA accuracy will also be examined.

scholarly journals Multiphase CT Angiography versus Single-Phase CT Angiography: Comparison of Image Quality and Radiation Dose

2008 ◽  
Vol 29 (7) ◽  
pp. 1288-1295 ◽  
Author(s):  
C.-Y. Yang ◽  
Y.-F. Chen ◽  
C.-W. Lee ◽  
A. Huang ◽  
Y. Shen ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Ct Angiography ◽  
Single Phase ◽  
Multiphase Ct

A quantitative analysis of CT angiography, large vessel occlusion, and thrombectomy rates in acute ischaemic stroke

2019 ◽  
Vol 74 (9) ◽  
pp. 731.e21-731.e25 ◽  
Author(s):  
E. Griffin ◽  
D. Herlihy ◽  
R. Hayden ◽  
M. Murphy ◽  
J. Walsh ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Ischaemic Stroke ◽  
Ct Angiography ◽  
Acute Ischaemic Stroke ◽  
Large Vessel ◽  
Large Vessel Occlusion ◽  
Vessel Occlusion

scholarly journals Leptomeningeal Collateral Flow Modifies Endovascular Treatment Efficacy on Large-Vessel Occlusion Strokes

Stroke ◽  
2021 ◽  
Vol 52 (1) ◽  
pp. 299-303
Author(s):  
Álvaro García-Tornel ◽  
Ludovico Ciolli ◽  
Marta Rubiera ◽  
Manuel Requena ◽  
Marian Muchada ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Odds Ratio ◽  
Adjusted Odds Ratio ◽  
Multivariable Analysis ◽  
Large Vessel ◽  
Collateral Flow ◽  
Vessel Occlusion ◽  
Shift Analysis ◽  
Final Degree ◽  
Large Vessel Stroke

Background and Purpose: We aim to evaluate if good collateral flow (CF) modifies endovascular therapy (EVT) efficacy on large-vessel stroke. To do that, we used final degree of reperfusion and number of device-passes performed, factors previously associated with better functional outcome, as main outcome measures. Methods: Single-center retrospective study including consecutive stroke patients receiving EVT for anterior circulation large-vessel stroke. CF degree was assessed on CT angiography before EVT using a previously validated 4-grade score. Final degree of reperfusion, using modified Thrombolysis in Cerebral Ischemia (mTICI), and number of device-passes performed were prospectively collected. Multivariable analysis was performed to evaluate the influence of collateral flow degree on final degree of reperfusion and number of device-passes performed. Results: Six hundred twenty-six patients were included in the study; 369 patients (59%) presented good collateral flow on CT angiography. Five hundred twenty-two patients (84%) achieved successful reperfusion (mTICI 2B-3) after EVT, 304 (48%) of them with a final mTICI 2C-3. Median number of device-passes was 2 (interquartile range, 1–3). Good CF was independently associated with better final degree of reperfusion (shift analysis for mTICI0-2A/2B/2C-3%, poor CF 19/38/43 versus good CF 15/32/53, adjusted odds ratio, 1.51 [95% CI, 1.08–2.11]). Poor CF was independently associated with higher number of device-passes performed to achieve successful reperfusion (mTICI2B-3; shift analysis for 1/2/3/4+ device-passes, adjusted odds ratio, 1.59, [95% CI, 1.09–2.31]) and complete reperfusion (mTICI2C-3; shift analysis for 1/2/3/4+ device-passes, adjusted odds ratio, 1.70 [95% CI, 1.04–2.90]). Conclusions: Patients with good CF treated with EVT experience higher rates of successful reperfusion with lower number of device-passes. CF may facilitate thrombus retrieval and prevent distal embolization of clot fragments, improving device-passes efficacy.

Sign in / Sign up

Export Citation Format

Share Document