Which type of tissue is characterized by low transverse magnetization following an RF pulse in a T2 sequence?

Prepare for the ASMIRT MRI Accreditation Test with comprehensive quizzes, flashcards, and in-depth explanations. Get familiar with exam format and content, ensuring your success!

In a T2-weighted MRI sequence, the contrast between different types of tissues is primarily influenced by the differences in their transverse relaxation times (T2). Fat-based tissues exhibit low transverse magnetization after an RF pulse due to their relatively short T2 relaxation time.

When an RF pulse is applied, the magnetic moments of the protons in the tissue are aligned, and as they return to their equilibrium state, they lose coherence in the presence of magnetic field inhomogeneities. Fat has a quicker relaxation process compared to other tissues like fluid or muscle, which have longer T2 relaxation times.

Consequently, in a T2-weighted image, fat appears darker than fluid-based tissues, which appear brighter due to their longer T2 relaxation times. This characteristic helps differentiate fat from other tissue types in MRI imaging, making it easily identifiable.

Recognizing how different tissues respond to RF pulses in a T2 sequence is crucial for interpreting MRI scans and understanding tissue characteristics in various pathologies.

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