MRIsekvenssien

MRIsekvenssien refers to Magnetic Resonance Imaging (MRI) sequences. These sequences are the fundamental building blocks of any MRI scan. They are specific sets of radiofrequency pulses and magnetic field gradients that are applied to the body to generate detailed images of internal structures. Different sequences are designed to highlight different tissue properties and can be used to detect various pathologies.

The most common MRI sequences include T1-weighted, T2-weighted, and proton density-weighted sequences. T1-weighted images are good for visualizing anatomy, with fat appearing bright and water appearing dark. T2-weighted images are sensitive to the water content of tissues, making them useful for detecting edema, inflammation, and tumors, as water appears bright. Proton density-weighted images provide a balance between T1 and T2 weighting.

More advanced sequences exist to further enhance image contrast and provide functional information. These include fluid-attenuated inversion recovery (FLAIR) sequences, which suppress the signal from free water to better visualize lesions near fluid-filled spaces, and diffusion-weighted imaging (DWI), which measures the random motion of water molecules and is highly sensitive to acute stroke. Susceptibility-weighted imaging (SWI) is used to detect blood products and calcifications.

The selection of appropriate MRI sequences depends on the clinical question being asked. Radiologists choose specific sequences to optimize the visualization of the area of interest and to detect potential abnormalities. The careful application and interpretation of these sequences are crucial for accurate diagnosis using MRI.