MRI is the Investigation of choice for which of the following?
Contrast-enhanced MRA is sufficiently sensitive to be used as a screening test for stenosis of the main renal aery. MRA has lower spatial resolution compared with conventional film-based angiography, and therefore the detection of small-vessel abnormalities, such as vasculitis and distal vasospasm, is problematic.
Renal stones
Renal aery stenosis
High grade VUR
Renal transplant rejection
Genitourinary radiology