System for generating spectral computed tomography projection data

US9833202B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Heiner Daerr · Hamburg, DE
• Roger Steadman Booker · Aachen, DE
• Gereon Vogtmeier · Aachen, DE
• Ewald Roessl · Ellerau, DE
• Gerhard Martens · Henstedt-Ulzburg, DE
• Carolina Ribbing · Aachen, DE

Key dates

• Filing date: Dec 1, 2015
• Grant date: Dec 5, 2017
• Expiry date: Dec 1, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05G1/58
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to a system (31) for generating spectral computed tomography projection data. A spectral projection data generation device (6) comprising an energy-resolving detector generates spectral computed tomography projection databased on polychromatic radiation (4), which has been provided by a radiation device (2), after having traversed an examination zone (5), and a reference values generation device generates energy-dependent reference values based on radiation, which has not traversed the examination zone. A spectral parameter providing unit (12) provides a spectral parameter being indicative of a spectral property of the radiation device based on the energy-dependent reference values. In particular, spectral properties of the radiation device can be monitored over time, wherein this information can be used for, for instance, correcting the spectral computed tomography projection data, and/or, if undesired spectral properties of the radiation device are indicated, triggering a replacement of the radiation device.