Comprehension: Arm Radiology
A sagittal MRI of the left arm is compared with a radiograph of the arm. Note that in the conventional radiograph, the humerus of this teenager is well shown. The proximal physis (growth plate) of the humerus has not yet closed. The anatomical boundaries of the humerus in its long axis are denoted. These are the epiphysis, metaphysis, and diaphysis. The radiograph shows the soft tissue shadows of the muscles but not well. MRI, on the other hand, brings out these soft tissue structures.
