Movement-compensated image reconstruction for an x-ray based imaging method

US12254534B2 · kind B2 · utility

Assignee

• Siemens Healthineers AG · DE

Inventors

• Michael Manhart · Fürth, DE
• Alexander Preuhs · Erlangen, DE
• Manuela Meier · Munich, DE

Key dates

• Filing date: Jan 12, 2024
• Grant date: Mar 18, 2025
• Expiry date: Jan 12, 2044

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/441
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

For creation of a movement-compensated image reconstruction in an x-ray based imaging method an optimal object movement trajectory is determined by application of a trained algorithm to an optimal latent vector and the movement-compensated image reconstruction is created depending on projection images, with the assumption that the object would have moved in accordance with the optimal object movement trajectory while the imaging method was being carried out. The optimal latent vector is determined by a predetermined cost function being minimized using the latent vector as an optimization parameter, wherein for each optimization step with a current latent vector, a current object movement trajectory is determined by application of a trained algorithm to the current latent vector, and a current value of the cost function is computed depending on the plurality of projection images, with the assumption that the object would have moved in accordance with the current object movement trajectory while the imaging method was being carried out.