There are relatively few causes of low signal intensity renal parenchyma. Causes include:
- haemolysis
- paroxysmal nocturnal haemoglobinuria
- mechanical: malfunctioning prosthetic cardiac valve
- sickle cell disease
- infection
- vascular disease
- acute renal vein thrombosis
- renal cortical necrosis
- arterial ischaemia and infarction
- rejection of transplanted kidney
- acute non-myoglobinuric renal failure