Type:
Educational Exhibit
Keywords:
Transplantation, Congenital, Aneurysms, Computer Applications-Detection, diagnosis, Computer Applications-3D, CT-Angiography, Kidney
Authors:
Z. Ahmad1, C. J. Das2, S. Kumar1, K. Rangarajan1, S. Sharma3, A. K. Gupta1; 1New Delhi/IN, 2Dehli/IN, 3NEW DELHI, DELHI/IN
DOI:
10.1594/ecr2013/C-2454
Imaging findings OR Procedure details
Multiphasic computed tomography is done in all patients on Somatom Definition Flash SIEMENS 256 slice scanner.
Our protocol includes noncontrast,
arterial,
venous and excretory phases using bolus tracking technique.
Positive oral contrast is not given as it obscures arterial anatomy.
Noncontrast scan
- helps pick up small calculi
- detect subtle arterial enhancement in a renal cyst.
Arterial phase
good to comment on the anatomy of both arteries and veins as the renal veins enhance quickly.
Venous phase
- Difficult to comment on venous anatomy as both arteries and veins are enhanced to a similar extent making it difficult to differentiate between them.
- However it is still required as some tributaries like adrenal,
gonadal and lumbar veins are opacified slowly.
Post processing techniques
Maximum intensity projection (MIP),
volume rendered techniques(VRT) and curved planar reconstructions are helpful in evaluating vascular anatomy.