Measuring blood volume with C-arm computed tomography

US8285014B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Guenter Lauritsch · Ergolding, DE
• Thomas Redel · Baiersdorf, DE
• Michael Zellerhoff · Forchheim, DE

Key dates

• Filing date: Apr 2, 2008
• Grant date: Oct 9, 2012
• Expiry date: Jun 26, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/032
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A system and method of obtaining perfusion data for cerebral tissue is described. The system includes a C-arm X-ray device and a computing system configured to obtain sets of rotational projection X-ray data suitable for reconstructing 3D voxel data sets. A first data set is obtained of the patient, and then contrast material is injected into the vascular system to obtain a second 1 data set. A first voxel data set is subtracted from the second voxel data set, and the resultant data set is processed so as to segment the contrast-enhanced vasculature from the remaining data. The segmented voxels are subtracted from the resultant voxel data set, so as to yield a functional data set representing the difference between the attenuation of the tissues after administering contrast agent and the tissues prior to administering the contrast agent, without the contrast enhanced vasculature. The attenuation of the functional data set represents the perfusion or cerebral blood volume (CBV).