scholarly journals A Novel Collateral Imaging Method Derived from Time-Resolved Dynamic Contrast-Enhanced MR Angiography in Acute Ischemic Stroke: A Pilot Study

2019 ◽  
Vol 40 (6) ◽  
pp. 946-953 ◽  
Author(s):  
H.G. Roh ◽  
E.Y. Kim ◽  
I.S. Kim ◽  
H.J. Lee ◽  
J.J. Park ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Pilot Study ◽  
Acute Ischemic Stroke ◽  
Mr Angiography ◽  
Imaging Method ◽  
Time Resolved ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced

Supra-aortic arteries: Three-dimensional time-resolved k-t BLAST contrast-enhanced MRA using a nondedicated body coil at 3 tesla in acute ischemic stroke

2013 ◽  
Vol 40 (5) ◽  
pp. 1056-1063 ◽  
Author(s):  
Jean-Christophe Ferré ◽  
Hélène Raoult ◽  
Stéphane Breil ◽  
Béatrice Carsin-Nicol ◽  
Thomas Ronzière ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Three Dimensional ◽  
3 Tesla ◽  
Time Resolved ◽  
Contrast Enhanced ◽  
Body Coil

scholarly journals Combined Low-Dose Contrast-Enhanced MR Angiography and Perfusion for Acute Ischemic Stroke at 3T: A More Efficient Stroke Protocol

2014 ◽  
Vol 35 (6) ◽  
pp. 1078-1084 ◽  
Author(s):  
K. Nael ◽  
A. Meshksar ◽  
B. Ellingson ◽  
M. Pirastehfar ◽  
N. Salamon ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Mr Angiography ◽  
Low Dose ◽  
Contrast Enhanced

Detection of early venous filling in gliomas on MRI: Preliminary Study by 2D time-resolved dynamic contrast-enhanced MR angiography with echo-sharing technique

2001 ◽  
Vol 19 (9) ◽  
pp. 1193-1201 ◽  
Author(s):  
Masahiko Sakamoto ◽  
Toshiaki Taoka ◽  
Satoru Iwasaki ◽  
Akio Fukusumi ◽  
Hiroyuki Nakagawa ◽  
...  
Keyword(s):  
Mr Angiography ◽  
Time Resolved ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced ◽  
Venous Filling ◽  
Preliminary Study

Dynamic contrast-enhanced computed tomography of acute ischemic stroke: CTA and CTP

2002 ◽  
Vol 37 (3) ◽  
pp. 192-205 ◽  
Author(s):  
Sean P. Cullen ◽  
Sean P. Symons ◽  
George Hunter ◽  
Leena Hamberg ◽  
Walter Koroshetz ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ischemic Stroke ◽  
Acute Ischemic Stroke ◽  
Dynamic Contrast Enhanced ◽  
Contrast Enhanced ◽  
Enhanced Computed Tomography ◽  
Contrast Enhanced Computed Tomography

Time-resolved, contrast-enhanced 3D MR angiography in the subclavian steal effect

VASA ◽  
2010 ◽  
Vol 39 (1) ◽  
pp. 85-93 ◽  
Author(s):  
Schubert
Keyword(s):  
Mr Angiography ◽  
Time Resolved ◽  
Time To Peak ◽  
Vertebral Arteries ◽  
Subclavian Steal ◽  
Cerebrovascular Events ◽  
Graphic Analysis ◽  
Contrast Enhanced ◽  
Hemodynamic Information ◽  
Supraaortic Vessels

The subclavian steal effect indicates atherosclerotic disease of the supraaortic vessels but rarely causes cerebrovascular events in itself. Noninvasive imaging providing detailed anatomic as well as hemodynamic information would therefore be desirable. From a group of 25 consecutive patients referred for MR angiography, four with absent or highly attenuated signal in one of the vertebral arteries on 3D multislab time-of-flight MR angiography were selected to undergo 3D time-resolved contrast-enhanced MR angiography. The time-resolved 3D contrast series (source images and MIPs) were evaluated visually and by graphic analysis of time-intensity curves derived from the respective V1 and V3 segments of both vertebral arteries on the source images. In two cases with high-grade proximal left subclavian stenosis, time-resolved 3D ce-MRA was able to visualise retrograde contrast filling of the left VA. There was a marked delay in time-to-peak between the left and right V1 segments in one case and a shallower slope of enhancement in another. In the other two cases, there was complete or collateralised segmental occlusion of the VAs.

Statistical analysis plan of the head position in acute ischemic stroke trial pilot (HEADPOST pilot)

2016 ◽  
Vol 12 (2) ◽  
pp. 211-215
Author(s):  
Verónica V Olavarría ◽  
Hisatomi Arima ◽  
Craig S Anderson ◽  
Alejandro Brunser ◽  
Paula Muñoz-Venturelli ◽  
...  
Keyword(s):  
Ischemic Stroke ◽  
Statistical Analysis ◽  
Pilot Study ◽  
Acute Ischemic Stroke ◽  
Transcranial Doppler ◽  
Controlled Trial ◽  
Statistical Analysis Plan ◽  
Head Position ◽  
Process Of Care ◽  
Anterior Circulation

Background The HEADPOST Pilot is a proof-of-concept, open, prospective, multicenter, international, cluster randomized, phase IIb controlled trial, with masked outcome assessment. The trial will test if lying flat head position initiated in patients within 12 h of onset of acute ischemic stroke involving the anterior circulation increases cerebral blood flow in the middle cerebral arteries, as measured by transcranial Doppler. The study will also assess the safety and feasibility of patients lying flat for ≥24 h. The trial was conducted in centers in three countries, with ability to perform early transcranial Doppler. A feature of this trial was that patients were randomized to a certain position according to the month of admission to hospital. Objective To outline in detail the predetermined statistical analysis plan for HEADPOST Pilot study. Methods All data collected by participating researchers will be reviewed and formally assessed. Information pertaining to the baseline characteristics of patients, their process of care, and the delivery of treatments will be classified, and for each item, appropriate descriptive statistical analyses are planned with comparisons made between randomized groups. For the outcomes, statistical comparisons to be made between groups are planned and described. Results This statistical analysis plan was developed for the analysis of the results of the HEADPOST Pilot study to be transparent, available, verifiable, and predetermined before data lock. Conclusions We have developed a statistical analysis plan for the HEADPOST Pilot study which is to be followed to avoid analysis bias arising from prior knowledge of the study findings. Trial registration The study is registered under HEADPOST-Pilot, ClinicalTrials.gov Identifier NCT01706094.

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