Keywords:
Oncology, Abdomen, MR, Imaging sequences, Image compression, Neoplasia
Authors:
I. P. KOTECHA1, A. Kohli2, D. Rajput2, L. Gosar2, A. Dhapare2, A. Bherwani3, M. Singh2; 1MUMBAI, MAHARASHTRA/IN, 2Mumbai/IN, 3400077/IN
DOI:
10.1594/ecr2012/C-2124
Methods and Materials
25 patients with a high PSA level (10-100 ng/ml ) and those with rising PSA levels were evaluated on a 3T Magnatom Verio scanner with phased array body coil.
These patients subsequently underwent TRUS guided biopsy of prostate and were proven as having prostate cancer
Technical parameters:
FOV - 16 x 16 cm,
larger FOV to look for lymph nodal spread
Matrix - 256 x 256
Slice thickness - 4 mm with an interslice gap of 1 mm
Sequences:
- T1WI axial for evaluating involvement of neurovascular bundles and to look for post biopsy hemorrhage (ref 13)
- T2WI sagittal,
axial and coronal for zonal anatomy of the prostate (ref 1,5,13),
suspicious hypointense nodule (ref 8) and extracapsular extension (ref 10)
- DWI (ref 4) to look for diffusion restriction and ADC drop
- Dynamic contrast enhanced (ref 6)to look for early enhancement of focal neoplastic nodule and post contrast T1WI for lymph node evaluation
- MR Spectroscopy (ref 11,12) to look for Choline peak and raised choline+creatine / citrate ratio in suspicious nodules