by
Gus Iversen, Editor in Chief | June 10, 2026
Memorial Sloan Kettering Cancer Center has filed a patent infringement lawsuit against GE HealthCare and related GE entities, alleging that the company's MotionFree respiratory motion-correction technology infringes a series of imaging patents developed by an MSK physicist.
The complaint, filed June 1 in the U.S. District Court for the District of Delaware, names General Electric Company, GE HealthCare Technologies Inc. and GE Medical Systems L.L.C. as defendants. MSK alleges infringement of six patents covering methods and systems for retrospective internal gating, a technique used to reduce image degradation caused by patient motion during PET imaging.
According to the complaint, the patents stem from work by Dr. Adam L. Kesner, an attending physicist in MSK's Department of Medical Physics. MSK says the inventions use image data collected during scans to derive respiratory motion signals without the need for external monitoring devices such as belts or markers. The technology is intended to improve image quality and lesion detection while automating motion correction.
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MSK contends that the imaging OEM's MotionFree software, also marketed as PET Digital Gating, uses similar methods to detect and characterize respiratory motion directly from PET acquisition data. The complaint cites GE HealthCare marketing materials, FDA submissions and technical documents describing MotionFree as a device-free respiratory gating solution that derives breathing signals from PET data and applies motion correction to reconstructed images.
The lawsuit also identifies several GE HealthCare PET/CT systems that incorporate MotionFree, including Discovery IQ Gen 2, Discovery MI Gen 2 and Omni Legend. MSK alleges that the products have been manufactured, marketed and sold in the U.S. using technology covered by the asserted patents.
MSK is seeking damages, including a reasonable royalty, and alleges that the infringement was willful. The cancer center is also requesting enhanced damages, attorneys' fees and a jury trial.
The court has not yet ruled on the allegations, and GE HealthCare has not filed a response to the complaint.
