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[Diagnosis of acute cerebral infarction using diffusion-weighted imaging by low field (0.2 T) magnetic resonance
T Okuyama1, Y Sasamori, H Takahashi
1Department of Neurosurgery, Takahashi Neurosurgical Hospital, Sapporo, Japan.
Abstract:
The purpose of this study is to confirm the diagnosis of acute cerebral infarction on diffusion-weighted imaging using low field (0.2 T) magnetic resonance image(MRI). Acute cerebral infarctions in 51 patients were examined on diffusion-weighted imaging using low field MRI within 48 hours after clinical symptoms. Diffusion-weighted imaging was examined using line scan method. Twenty-four cases were cortical infarction, and twenty-two cases were perforating infarction. In five cases out of 51 cases, ischemic regions were not detected as abnormal high signal intensity area on diffusion-weighted imaging. Four cases of no abnormal detection were transient ischemic attack, and the other one was a perforating infarction. The earliest detection time in cortical infarction cases was 1 hour and 20 minutes. On the other hand, the earliest detection time in perforating infarction cases was 3 hours. Detective ability for acute cerebral infarction on diffusion-weighted imaging by low field MRI was depending on both size and lesion of infarction. That is to say, either small size or brain stem infarction was hard to detect. Thin slice and vertical slice examination for the infarction may improve to diagnose in low field MRI. Our conclusion is acute cerebral infarction was able to be diagnosed on diffusion-weighted imaging by low field as well as high field MRI.
Insights
Low field magnetic resonance imaging (MRI) effectively diagnoses acute cerebral infarction using diffusion-weighted imaging. This technique shows promise for detecting strokes, especially with optimized imaging protocols.
Area of Science:
- Neurology
- Radiology
- Medical Imaging
Background:
- Confirming acute cerebral infarction diagnosis using low-field (0.2 T) MRI.
- Evaluating diffusion-weighted imaging (DWI) performance within 48 hours of symptom onset.
Observation:
- 51 patients with suspected acute cerebral infarction were analyzed using low-field MRI with DWI.
- Cortical and perforating infarctions were identified, with detection times varying by infarction type.
- Five cases showed no abnormal signals; four were transient ischemic attacks, one a perforating infarction.
Findings:
- Low-field MRI with DWI successfully diagnosed acute cerebral infarction in most cases.
- Detection sensitivity depended on infarction size and location; small or brainstem lesions were harder to detect.
- Optimized imaging techniques like thin and vertical slices may enhance diagnostic accuracy.
Implications:
- Low-field MRI with DWI is a viable tool for diagnosing acute cerebral infarction, comparable to high-field MRI.
- Further research into advanced DWI techniques could improve detection rates for challenging lesions.
- This technology may increase accessibility to stroke diagnosis in resource-limited settings.