Do you recommend a kidney ultrasound to evaluate for microcystic changes when caring for a patient with chronic kidney disease suspected secondary to chronic lithium use?

Not sure if the ultrasound will add to management beyond lab values and routine ultrasound for patients with CKD. The question comes if someone has microcystic changes and normal creatinine levels, would that indicate a need for a change of therapy? In the past, lithium has been a very effective (ma...