How to interpret brain MRI images by yourself
Dec 24, 2022
Source: Cainiu Health
Dr. Yang Jun
Introduction
Brain MRI images include T1-weighted, T2-weighted, diffusion-weighted, and FLAIR imaging. T1-weighted images primarily show the anatomical structures of the brain, while T2-weighted images are mainly used to reveal brain abnormalities. FLAIR imaging is typically a fluid-attenuated version of T2-weighted images, and diffusion-weighted imaging is generally used to detect acute-phase cerebral infarction.
Brain MRI can accurately detect early and subtle lesions. Depending on the location and sequence used, imaging includes T1-weighted imaging, T2-weighted imaging, FLAIR imaging, and specialized diffusion imaging of the brain. The specific procedures are as follows:
1. T1-weighted imaging is primarily used to display detailed structures of the brain. It focuses on anatomical soft tissues, clearly showing gray matter, white matter, and the course of nerve fibers.
2. T2-weighted imaging is mainly used to identify brain abnormalities. Abnormal signals typically appear at lesion sites, usually presenting as hyperintense (high signal intensity).
3. FLAIR imaging is generally a fluid-attenuated version of T2 imaging, which suppresses signals from fluids. This allows each lesion to be seen more clearly on the sequence, with lesions typically appearing as hyperintense areas.
4. Diffusion-weighted imaging (DWI) is primarily used to detect acute cerebral infarction. Lesions usually appear bright (white) on DWI, while corresponding areas appear dark on the apparent diffusion coefficient (ADC) map.
To properly interpret brain MRI scans, one must first distinguish the imaging orientation, then identify the specific imaging method used, and finally determine whether the lesion signals are abnormal. It is recommended to visit a qualified medical institution and have the images evaluated under the guidance of a professional physician.
