A 72 year-old-female presents with low back pain and right hip pain that has progressively worsened over the last year. Her primary complaint is that she just can't walk the distance that she use to. Symptoms are worsened with prolonged walking and improve with sitting. The pain is located in her right buttock, right groin, and anterior thigh. Neurologic exam shows no motor deficits, normal sensation, and normal reflexes in the bilateral lower extremity. Physical examination of the spine shows a negative straight leg test, and increased pain in buttocks with prolonged erect standing. Physical exam of the right hip shows 0° of internal rotation and 10° of external rotation. Physical exam of the left hip shows 20° of internal rotation and 40° of external rotation. Range of motion testing of the right hip elicits pain. Current imaging is shown in Figures A & B. What would be the most appropriate step?