Fat on T2-weighted MRI appears as which signal intensity?

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Study for the Image Modalities Test to enhance your knowledge of various imaging techniques. Prepare with flashcards and multiple choice questions, each accompanied by hints and explanations. Get ready to ace your exam!

Multiple Choice

Fat on T2-weighted MRI appears as which signal intensity?

Explanation:
On T2-weighted MRI, signal is driven by T2 relaxation and fluid content. Fat tissue typically yields a relatively high signal on T2, so it appears bright rather than dark. The bright appearance helps distinguish fat from other tissues in non-fat-saturated T2 images. Only when a fat-saturation (fat-sat) technique or a sequence designed to suppress fat is used would fat appear dark. So, fat on T2-weighted imaging is best described as bright.

On T2-weighted MRI, signal is driven by T2 relaxation and fluid content. Fat tissue typically yields a relatively high signal on T2, so it appears bright rather than dark. The bright appearance helps distinguish fat from other tissues in non-fat-saturated T2 images. Only when a fat-saturation (fat-sat) technique or a sequence designed to suppress fat is used would fat appear dark. So, fat on T2-weighted imaging is best described as bright.

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