Respiratory Gating System, Catalog #NPTA540, Model #4535 674 26701, which includes: Pulmonary digital assembly kit and Pulmonary toolkit oncology Pro available on the following GEMINI PET/CT systems: GEMINI GXL 16 slice configuration, Model Number: 4535 679 75691.

A leak between the Tube Interface and the Outlet Tube of the transducer for the Respiratory Gating System component may result in a failure of the device to produce respiratory correlated images.

Philips Medical Systems Nuclear Medicine division initiated this recall by sending a 'Customer Advisory Notification to their customer accounts on 11/24/2008. This notification informs the customer of the potential for the device equipped with the Pulmonary Gating Option to develop an air leak which could result in the device being unable to produce the desired respiratory correlated images. The notification provides field test instructions and recommends that the customer test the bellows on each day of use in order to assess that the unit is functioning properly. If the bellows device fails the test the recalling firm recommends that the unit not be used and that the recalling firm be contacted via telephone or E-mail. The firm intends to conduct a field correction of the affected units in which their Field Service Engineers will install upgrade kits on the affected devices tentatively scheduled to begin in September, 2009.