Role of electron density weighted images
Case courtesy of Dr. Anthony Severt.
70 year old female presents to the hospital with fatigue, loss of appetite and abdominal pain for one month. She had subjective fevers, and white count was elevated. A non-contrast CT scan performed because of concern with renal function shows subtle hypodense areas in the liver, and portal vein thrombosis.
Turn on spectral CT, and electron density weighted images show the hypodense lesions much better! This is very interesting, because I thought that spectral CT was useful in contrast enhanced scans; but clearly, has a role in non-contrast scans as well!
Followup MRI shows the lesions very well, the T2W appearance and restricted diffusion is consistent with abscesses. Purulent material obtained by aspiration.