Preferred models for hospitals. Above Grade II, using X-Ray + B-Ultrasound. Double positioning technology. The doctor according to aptient's site of stones and stone composition decided on the location.
The two positioning methods complement each other. Not only can solve some negative stones difficult to X-Ray imaging problem, but also to solve the B-Ultrasound in the exploration and positioning of the middle ureteral calculi affected by the Ilium.