MRI Principles
A registrar is reviewing MRI sequences for a patient with suspected bone marrow oedema. They ask about the principles of different MRI sequences and how to interpret them. Regarding MRI imaging principles and sequences in orthopaedics:
Mark each as TRUE or FALSE
MRI uses radiofrequency pulses to excite hydrogen protons in a strong magnetic field; T1 relaxation ...
On T1-weighted images: Fat is bright (short T1), fluid is dark, muscle is intermediate grey, and cor...
On T2-weighted images: Fat is dark, fluid is dark, and muscle is bright; STIR sequences suppress fat...
STIR (Short Tau Inversion Recovery) suppresses fat signal making fluid/oedema appear very bright; ST...
Gadolinium contrast shortens T1 relaxation time, causing enhancement on T1-weighted images; it is us...
Answer the questions to see explanations
Click T (True) or F (False) for each option