Stroke
Conditions
Keywords
Ischemic Stroke, Magnetic Resonance Imaging, Cerebrovascular Disease
Brief summary
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.
Detailed description
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.
Interventions
DIAGNOSTIC_TESTmulti-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.
Sponsors
Xuanwu Hospital, Beijing
Study design
Observational model
CASE_ONLY
Time perspective
PROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
1. Ischemic stroke within 24h； 2. Anterior circulation occlusion confirmed by conventional angiography or magnetic resonance angiography；
Exclusion criteria
1. Pregnancy and other contraindication to MRI scan； 2. Informed consent not obtained.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Compare the volume of reversible ischemic injury of brain tissue measured by multi-delay ASL versus CTP | 24 hours | 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, |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| The difference of the procedure of CTP and multi-delay ASL | 24hours | 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. |
Countries
China
Contacts
Primary Contactqingfeng Ma, MD
Backup Contactchuming Yan, MBBS
Outcome results
None listed