Dark field computed tomography imaging

US9761021B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Thomas Koehler · Norderstedt, DE
• Bernhard Brendel · Norderstedt, DE
• Ewald Roessl · Ellerau, DE
• Udo Van Stevendaal · Ahrensburg, DE

Key dates

• Filing date: May 13, 2013
• Grant date: Sep 12, 2017
• Expiry date: Feb 8, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/10081
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method includes obtaining a dark-field signal generated from a dark-field CT scan of an object, wherein the dark-field CT scan is at least a 360 degree scan. The method further includes weighting the dark-field signal. The method further includes performing a cone beam reconstruction of the weighted dark-field signal over the 360 degree scan, thereby generating volumetric image data. For an axial cone-beam CT scan, in one non-limiting instance, the cone-beam reconstruction is a full scan FDK cone beam reconstruction. For a helical cone-beam CT scan, in one non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan aperture weighted wedge reconstruction. For a helical cone-beam CT scan, in another non-limiting instance, the dark-field signal is rebinned to wedge geometry and the cone-beam reconstruction is a full scan angular weighted wedge reconstruction.