Hariqbal Singh1, S K Khanna2, Peeyush Dhagat3, S K Jain4. 1. Senior Adviser, Department of Radiology, Command Hospital (SC), Pune 411 040. 2. Advance course trainee, Department of Radiology, Command Hospital (SC), Pune 411 040. 3. Senior Adviser (Radiology), Army Hospital (R & R), Delhi Cantt. 4. DDMS, HQ 33 Corps (Med), C/o 99 APO.