4D Parathyroid CT-Scan
At Providence Saint John’s we use the newest, most up-to-date technology to help locate abnormal parathyroid glands. We are one of only a few institutions in the greater Los Angeles area that can perform a special 3D/4D parathyroid CT scan. Surgeon-performed ultrasound is the first imaging test that should be used to localize an abnormal parathyroid gland. However, ultrasound only discovers an abnormal gland 50-60% of the time and therefore many patients need a second, more sensitive imaging test to find the abnormal gland(s).
4D-CT is currently the most cost-effective, sensitive, specific, and time-efficient imaging test for parathyroid localization. The name of the technique comes from adding a dimension of time to a normal CT scan to look at changes over time in the perfusion of IV-contrast through a parathyroid gland. A CT scan visualizes anatomic locations that an ultrasound cannot see allowing this special protocol to produce very detailed anatomical visual of the neck and functional information on abnormal parathyroid gland(s). We use a lower-radiation, 3D protocol to minimize the amount of radiation for patients.