Hariqbal Singh1, R K Jetley2, S C Chamoli3, S K Khanna4. 1. Classified Specialist, Department of Radiodiagnosis, Command Hospital (Southern Command), Pune 411 040. 2. Addl Director General Medical Services (Army), Office of DGMS (Army), Army Headquarters, L Block, New Delhi 110001. 3. Graded Specialist, Radiology, MH Jalandhar Cantt. 4. Senior Advisor, Department of Radiodiagnosis, Command Hospital (Southern Command), Pune 411 040.