During these studies, the activity in the gut significantly exceeds the activity in the heart. This causes problems in the positioning of patients and the normalization of the images prior to processing. Though draping a lead cape over the patient is a common shielding technique, it is not only cumbersome and difficult to apply but often uncomfortable for the patient. The leaded vinyl is equivalent to 2mm of lead. Using this fastening method, installation and removal of the shield is easy and allows it to be used on multiple cameras.
Shields are available for circular or rectangular camera heads.