# K041955: Gemini Pet/CT Imaging System

- Pathway: 510(k) (Traditional)
- Applicant: Philips Medical Systems (Cleveland), Inc.
- Decided: Jul 29, 2004 after 8 days
- Product code: KPS (System, Tomography, Computed, Emission)
- Device class: 2
- Regulation: 21 CFR 892.1200
- Recalls of this device: 2 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 5 generations back to K930090 (1993). 17 ancestors in all.
65 later devices descend from it; 2 cite it directly.
0 of 83 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K032036: Gemini 16, Philips Medical Systems (Cleveland), Inc. (2003) Summary page 1.
- K012009: MX8000 Idt CT System, Marconi Medical Systems, Inc. (2001) Summary page 1.
- K033782: Allegro Imaging System, Philips Medical Systems (Cleveland), Inc. (2003) Summary page 1.
- K040172: Modification to GE Discovery LS System, GE Medical Systems (2004) Summary page 1.

## Most influential descendants
- K062650: EP Navigator Software (2006), 49 descendants of its own
- K101311: EP Navigator R3 (2010), 41 descendants of its own
- K111245: Heartnavigator Release 1 (2011), 39 descendants of its own
- K121781: Echonavigator Release 1 (2012), 32 descendants of its own
- K172607: Philips EPIQ 5 Diagnostic Ultrasound System, EPIQ 7 Diagnostic Ultrasound System, Affiniti 30 Diagnostic Ultrasound System, Affiniti 50 Diagnostic Ultrasound System, Affiniti 70 Diagnostic Ultrasound System (2017), 28 descendants of its own

## Recalls of this device
- Mar 6, 2015 · Class II · Z-1776-2015: The firm was notified that the failure of the UPS accessory devices used in conjunction with Computed Tomography X-ray systems and Diagnostic Imaging systems. may result in battery acid leakage, overh
- Nov 6, 2006 · Not classified · Z-0013-2007: A potential anomaly was identified on the CT subsytem, which could result in the radiation dose being different than the calculated dose reported to the operator.

## Indications for use
The device is a diagnostic imaging system for fixed or mobile installations that combines Positron Emission Tomography (PET) and X-ray Computed Tomography (CT) systems. The CT subsystem produces cross-sectional images of the body by computer reconstruction of x-ray transmission data. The PET subsystem produces images of the distribution of PET radiopharmaceuticals in the patient body (specific radiopharmaceuticals are used for whole body, head, heart and other organ imaging). Attenuation correction is accomplished by either CTAC or Cs-137. The device also provides for list mode, dynamic, and gated acquisitions. Image processing and display workstations provide software applications to process, analyze, display, quantify and interpret medical images/data. The PET and CT images may be registered and displayed in a "fused" (overlaid in the same spatial orientation) format to provide combined metabolic and anatomical data at different angles. Trained professionals use the images in: o The evaluation, detection and diagnosis of lesions, disease and organ function such as but not limited to cancer, cardiovascular disease, and neurological disorders. o The detection, localization, and staging of tumors and diagnosing cancer patients. o Treatment planning and interventional radiology procedures. Cardiac imaging software provides functionality for the quantification of cardiology images and datasets including but not limited to myocardial perfusion for the display of wall motion and quantification of left-ventricular function parameters from gated myocardial perfusion studies and for the 3D alignment of coronary artery images from CT coronary angiography onto the myocardium. Both subsystems (PET and CT) can also be operated independently as fully functional, diagnostic imaging systems including application of the CT scanner as a radiation therapy simulation scanner.

Source page: https://510kreport.com/device/K041955
Methodology: https://510kreport.com/methodology