scholarly journals CT Angiography Source Images with Modern Multisection CT Scanners: Delay Time from Contrast Injection to Imaging Determines Correlation with Infarct Core

2012 ◽  
Vol 33 (4) ◽  
pp. E61-E61 ◽  
Author(s):  
B. Pulli ◽  
A.J. Yoo
Keyword(s):  
Ct Angiography ◽  
Delay Time ◽  
Contrast Injection ◽  
Infarct Core ◽  
Ct Scanners

WE-C-103-12: Individually Optimized Contrast Injection in CT Angiography for the Diagnosis of Pulmonary Thromboembolic Disease

2013 ◽  
Vol 40 (6Part29) ◽  
pp. 483-483
Author(s):  
M Xue ◽  
H Zhang ◽  
S Kligerman ◽  
W D' Souza ◽  
P Klahr ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Thromboembolic Disease ◽  
Contrast Injection

scholarly journals CTA Source Images as a Predictor of Final Infarct Volume are Time-Dependent

2010 ◽  
Vol 37 (6) ◽  
pp. 866-867 ◽  
Author(s):  
Dylan Blacquiere ◽  
Miguel Bussière ◽  
Cheemun Lum ◽  
Dar Dowlatshahi
Keyword(s):  
Acute Stroke ◽  
Ct Angiography ◽  
Ct Perfusion ◽  
Infarct Volume ◽  
Artery Occlusion ◽  
Time Dependent ◽  
Infarct Core ◽  
Time Resolved

Avascularity on CT angiography source images (CTASI) may better predict final infarct volume in acute stroke as compared to early ischemic changes on non-contract CT. These CTASI findings may represent infarct core and help determine the extent of salvageable tissue. However, the extent of avascularity on CTASI may overestimate infarct volume if transit of contrast is prolonged due to proximal artery occlusion. We present a case where CT-perfusion (CTP) and time-resolved CT-angiography (CTA) identified salvageable tissue thought to be infarcted on CTASI.

Comparison of four different collateral scores in acute ischemic stroke by CT angiography

2015 ◽  
Vol 8 (11) ◽  
pp. 1116-1118 ◽  
Author(s):  
Fatih Seker ◽  
Arne Potreck ◽  
Markus Möhlenbruch ◽  
Martin Bendszus ◽  
Mirko Pham
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Ct Angiography ◽  
Cross Correlation ◽  
Single Phase ◽  
Infarct Core ◽  
Conventional Angiography ◽  
Grading Systems ◽  
American Society ◽  
No Gold Standard

PurposeMultiple scores have been described for the assessment of collateralization in acute ischemic stroke. Currently, there is no gold standard for collateral assessment by CT angiography (CTA). This study compared four frequently used collateral scores with regard to their correlation with early infarct core and mismatch ratio.Methods30 consecutive patients with acute occlusion of the M1 segment or terminal carotid artery were reviewed retrospectively. Collaterals were assessed using dynamic and also single-phase CTA according to grading systems by the American Society of Interventional and Therapeutic Neuroradiology/Society of Interventional Radiology (ASITN/SIR), Alberta Stroke Program Early CT Score (ASPECTS) (on collaterals), Christoforidis et al and Miteff et al. The Christoforidis and ASITN/SIR scores, which were initially designed for conventional angiography, were adapted to be applicable to CTA. The scores were compared with respect to early infarct core and mismatch ratio in perfusion CT estimated by RAPID software using Spearman correlation.ResultsASITN/SIR and ASPECTS collateral scores showed good correlation with early infarct core (rho=−0.696, p<0.001 and rho=−0.677, p<0.001) and mismatch ratio (rho=0.609, p<0.001 and rho=0.581, p<0.001). In contrast, the Christoforidis and Miteff scores correlated less well with infarct core (rho=0.245, p=0.191 and rho=−0.272, p=0.145, respectively) and mismatch ratio (rho=−0.329, p=0.075 and rho=0.279, p=0.135, respectively). ASPECTS and ASITN/SIR showed excellent cross-correlation (rho=0.901, p<0.001).ConclusionsCompared with the Christoforidis and Miteff scores, the modified ASITN/SIR and ASPECTS collateral scores showed consistently higher correlation with the extent of early infarct core and mismatch volume. This is probably because these scores evaluate the extent and delay of vascular enhancement in the affected territory rather than the backflow of contrast medium to the occlusion.

scholarly journals Defining the optimal systolic phase targets using absolute delay time for reconstructions in dual-source coronary CT angiography

2015 ◽  
Vol 32 (1) ◽  
pp. 91-100 ◽  
Author(s):  
Csilla Celeng ◽  
Harshna Vadvala ◽  
Stefan Puchner ◽  
Amit Pursnani ◽  
Umesh Sharma ◽  
...  
Keyword(s):  
Ct Angiography ◽  
Delay Time ◽  
Coronary Ct Angiography ◽  
Coronary Ct ◽  
Dual Source ◽  
Systolic Phase

SU-E-I-31: Differences Observed in Radiation Doses Across 2 Similar CT Scanners From Adult Brain-Neck CT Angiography

2015 ◽  
Vol 42 (6Part6) ◽  
pp. 3248-3248
Author(s):  
K Fujii ◽  
K McMillan ◽  
M Bostani ◽  
C Cagnon ◽  
M McNitt-Gray
Keyword(s):  
Ct Angiography ◽  
Adult Brain ◽  
Radiation Doses ◽  
Ct Scanners ◽  
I 31
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