Spectral CT

US8442184B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Peter Forthmann · Latham, US
• Udo Van Stevendaal · Ahrensburg, DE
• Ewald Roessl · Ellerau, DE
• Michael Grass · Hanstedt, DE
• Roland Proksa · Hamburg, DE
• Jens-Peter Schlomka · Hamburg, DE

Key dates

• Filing date: Jun 1, 2009
• Grant date: May 14, 2013
• Expiry date: Mar 23, 2030

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/482
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An imaging system includes a radiation source (106, T1, T2, T3) that rotates about an examination region and emits radiation that traverses the examination region. The radiation source (106, T1, T2, T3) emits radiation having an energy spectrum that is selectively alternately switched between at least two different energy spectra during an imaging procedure. The system further includes an energy-resolving detector array (116, D1, D2, D3) that detects radiation traversing the examination region. The energy-resolving detector array (116, D1, D2, D3) resolves the detected radiation over at least two different energy ranges and produces energy-resolved output signals as a function of both emission energy spectrum and energy range. The system further includes a reconstructor (126) that performs a spectral reconstruction of the energy-resolved output signals. In another embodiment, the detector array (116) includes a photon-counting detector array (116).