Ultrasound   Ultrasound is a specialized tool that looks inside the body using sound waves (as opposed to x-rays which use radiation). It is excellent for evaluating many, but not all, areas of the body. Ultrasound is especially effective for examining interior body cavities like the abdomen. This examination may require some preparation. Your physician's office may schedule your appointment Monday - Friday at Maplewood Imaging Center, Greystone Imaging Center, and Central Triad Imaging Center. Preparing for Your Abdominal Ultrasound Preparing for Your Pelvic Ultrasound Lunar Achilles Express Ultrasonometer uses Ultrasound of the heel to measure bone density for evaluation of the risk of osteoporosis. Screening for Osteoporosis with Heel Ultrasound is now available at Central Triad Imaging Center.