<prompt> Best investigation for multiple osteoblastic bone metastases is-MRICTBone ScanX Ray  <response>: Ans. is c i.e., Bone scan o Bone scan scintigraphy is the investigation of choice for multiple osteoblastic bone metastasis. Investigations in musculoskeletal system o Investigation of choice for AVN Hip - MRI o Best initial test for osteomyelitis - Plain x-ray o Best second line test for osteomyelitis if there is high clinical suspician and x-ray is negative - MRI o Most accurate diagnostic test for osteomyelitis - Bone biopsy and culture, o Best view for scaphoid fracture - Oblique scaphoid view of wrist. o Best view for C1-C2 vertebrae junction - Open mouth odontoid Pegs view. o Investigation of choice for ACL PCL injury - MRI o Investigation of choice to detect calcification - CT scan o Investigation of choice for prolapsed intervertebral disc - MRI o Investigation of choice for spinal tuberculosis - MRI o Investigation of choice for traumatic paraplagia - MRI o Investigation of choice in intramedullary space occupying lesion SOL - MRI o Investigation of choice for bone metastasis - Bone scan o Gold standard and investigation of choice for osteoporosis Bone density - Dual energy x-ray absorptiometry DEXA . 