Lower Extremities
Hints in General
•Topogram: TOP, 256 mm for joint studies.
•Patient positioning:
Depends on the region of examination. In general, for bilateral studies, you should always try to posi- tion the patient symmetrical whenever the patient can comply.
•For knee scan:
Patient lying in supine position, feet first, promote relaxation by placing Bocollo pillows between knees and feet, bind feet together. The only exceptions are extremely light patients. The latter can remove the leg not being examined from the gantry by bending it 90° at the hip and the knee and placing the bottom of the same foot against the gantry casing.
•For ankle and feet scans:
Patient lying in supine position, feet first. Bind both ankles together if necessary to assure the TOP posi- tion of both feet.
•Retrospective reconstruction can be done: a)Use B31s kernel for soft tissue evaluation. b)For targeted FoV images on the affected side, it is
advisable to enter the side being examined in the comment line.
•To further optimize MPR image quality, we recom- mend that you reduce one or more of the following parameters: collimation, reconstruction increment, and slice width for image reconstruction.
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