Final answer:
To prepare for an ultrasound on the right trochanter area, the patient should be in a supine position with the right hip and knee slightly flexed.
Step-by-step explanation:
In order to perform an ultrasound on the right trochanter area, the patient is typically placed in a supine position, which means lying on their back. The patient's right hip and knee should be slightly flexed to help relax the muscles in the area. The ultrasound probe can then be positioned on the right trochanter area, allowing for imaging and assessment.