Stroke affects one in four people over a lifetime, and the burden is rising with an aging population. In ischemic stroke, timely and accurate assessment is essential, as every minute can mean lost brain function. According to the 2018 AHA guidelines, CT perfusion (CTP) plays a key role in selecting patients for extended mechanical thrombectomy. Compared to MR perfusion, CTP is faster, more accessible, and better suited for emergency care1.
uOmnispace.CT™ Brain Perfusion provides automated, quantitative analysis with a fast and intuitive workflow. It supports confident stroke decisions and also contributes to tumor evaluation where perfusion insights are needed.
[1]. American Heart Association / American Stroke Association (2018) Guidelines for the Early Management of Patients With Acute Ischemic Stroke. 2018;49:e46–e110.
Clinical Case
In this case of acute ischemic stroke (left MCA occlusion), the patient presented with right-sided weakness and underwent CT and MRI 3 hours after onset.Non-contrast CT (hypodensity) and DWI (hyperintensity) show a large acute infarct in the left temporo-occipital lobe. CTA confirms occlusion of the left MCA M1 segment.CT perfusion demonstrates a large hypoperfused region, with reduced CBF/CBV and prolonged MTT, TTP, and Tmax. rCBF and Tmax maps show high agreement with the DWI lesion, indicating accurate infarct core delineation.
In this case of acute ischemic stroke (right MCA occlusion), the patient underwent CT and MR 1 day after onset of left-sided weakness.
Non-contrast CT shows only small lacunar infarcts near the right lateral ventricle, while DWI reveals new infarction in the right temporo-occipital lobe and periventricular region. CTA demonstrates occlusion of the right MCA M1 segment with absent distal branches.
CT perfusion shows a corresponding hypoperfused area, with reduced CBF/CBV and prolonged MTT, TTP, and Tmax. rCBF and Tmax maps show high agreement with the DWI lesion, confirming accurate infarct core delineation.
In this case of acute ischemic stroke (left MCA stenosis), the patient presented with aphasia and right-sided weakness for 15 minutes, with an NIHSS score of 7.
CT perfusion demonstrates a small ischemic core in the left occipital lobe (rCBF < 30%), with a markedly larger hypoperfused penumbra extending throughout the left MCA territory (Tmax > 6s), indicating significant perfusion-diffusion mismatch.
Following balloon angioplasty of the left MCA, the patient achieved good recovery (mRS 0). The perfusion mismatch pattern was consistent with the clinical assessment.
Using the brain tumor protocol, automated calculation of tumor-related perfusion parameters is performed, including CBV, CBF, TTP, MTT, and PS.
Disclaimer:
1: The product may not be commercially available in all countries. Please check with your local United Imaging Healthcare representative for availability.
2: This product is intended for use by trained medical professionals only. Please contact your local United Imaging Healthcare organization for further details.