An observational study in Stroke, sponsored by Xuanwu Hospital, Beijing. Recruiting at 1 site in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-01-28.
Sponsored by Xuanwu Hospital, Beijing · Observational
This study explores the value of the non-invasive quantitative evaluation system for cerebral blood flow perfusion function in the diagnosis of stroke. Compared with traditional perfusion techniques, multi-delay arterial spin labeling (ASL) is validated to determine the accuracy of perfusion level, ischemic penumbra and other indexes in patients with acute ischemic stroke. The relationship between perfusion levels of mD-ASL parameters and clinical outcome is also studied.
A total of 200 patients with acute anterior circulation ischemic stroke will be prospectively enrolled.
All patients underwent CTP, multi-delay ASL, DWI, CTA or TOF-MRA scanning. CBF, CBV, MTT and Tmax will be obtained based on CTP, and the range of reversible cerebral ischemia injury will be calculated based on DWI and CTP data. CBF, CBV and ATT images will be obtained based on the multi-delay ASL, and the calculated results of reversible cerebral ischemia injury will also be obtained.
Meanwhile, the image quality of CTP and multi-delay ASL will be evaluated. The time from the patient to the completion of imaging examination and the imaging examination time will be recorded.
Mann-whitney U test and T test can be used to compare the difference of assessment time between different test methods. Chi-square test can be used to compare the differences of image quality among different examination methods. Wilcoxon rank sum test can be used to evaluate the difference between CTP and Multi-delay ASL in terms of parameters and volume of reversible ischemic injury.
7,286 studies on the registry are indexed under Stroke; 2,007 are open to participants now.
This study's planned enrollment of 200 is above the median of 160 across 1,692 observational studies indexed under Stroke.
Browse Stroke studies →Xuanwu Hospital, Beijing is the lead sponsor of 346 studies on the registry; 217 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients with acute anterior circulation ischemic stroke without contraindication to MRI will be enrolled.
Exclusion Criteria:
The cohort includes patients with acute stroke who underwent CTP, multi-delay ASL, DWI, CTA or TOF-MRA scanning.All patients will be examined within 24 hours of onset. CBF, CBV, MTT and Tmax cerebral blood flow parameter images of CTP will be obtained. CBF, CBV and ATT cerebral blood flow parameter images in multi-delay ASL will be obtained by the quantitative evaluation system. The volume of reversible ischemic tissue will be calculate according to CTP and multi-delay ASL respectively.
Diagnostic Test: multi-delay arterial spin labeling
Multi-delay arterial spin labeling is a new method to evaluate the degree of the cerebral perfusion. It can obtain three parameters including CBF,CBV and ATT without radiation,which is similar to the traditional technology. Multi-delay ASL can provide more information of the acute stroke patients.
Compare the volume of reversible ischemic injury of brain tissue measured by multi-delay ASL versus CTP
Our primary aim is to determine if the diagnostic accuracy of multi-delay Arterial Spin Labeling (ASL) is as good as the diagnostic accuracy of CTP in acute ischemic stroke patient. To test if ASL in noninferior to CTP,
Time frame: 24 hours
The difference of the procedure of CTP and multi-delay ASL
The researchers will collect the time from diagnosis to completion of imaging examination and the time of imaging examination.Then analyze the time and quality of the multi-delay ASL compared with CTP.
Time frame: 24hours
Plan to share: Undecided
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Xuanwu Hospital, Beijing