<prompt> Which one of the following is the investigation of choice for evaluation of suspected Pehes disease?Plain X-rayUltrasonography USComputed Tomography CTMagnetic Resonance Imaging MRI  <response>: Bone scan and MRI are investigations to establish a diagnosis earlier. Diagnostic accuracy of 97-99 for MRI compared to 88-93 for radiography. Ref: Diagnostic Imaging of Musculoskeletal Diseases: A Systematic Approach By Akbar Bonakdarpour, William R. Reinus, Jasvir S. Khurana, 2009, Page 112; Tachdjians Paediatric Ohopaedics, 3rd Edition, Page 680; Campbells Operative Ohopaedics, 10th Edition, Page 1155 