TMJ series typically include teeth closed in CR bite and then a open full without bite block. Open full usually suggests having the patient open wide to a comfortable position that can be held for the duration of the scan. Any additional TMJ views (splint, wax bite, etc.) should be based on a patient-specific need.
The closed scan should be a high resolution scan that includes all the maxillofacial structures. The open scan can be a limited field of view scan of the TM joints taken at a lower resolution with a shorter scan time to reduce patient dose.
The MRI should be done without contrast. Additional requirements for MRI imaging of the TMJs can be found here.
Please provide clinical observations when submitting all TMD cases. Examples of information needed include: The presence or absence of popping, clicking, pain, limited opening, and any relevant patient history.