Motion correction based on reprojection data
US5552605A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Nov 18, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S378/901
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A SPECT camera system has detector heads (14a, 14b, 14c) each having a collimator (18) facing toward an examination region (10). The detectors receive emission radiation from a radioisotope injected into a subject in the examination region and, preferably, also receive transmission radiation from a transmission source (20) disposed across the examination region. The detectors rotate around the subject through a plurality of projection angles. The detectors generate projection views from the received radiation for each projection angle. The projection views are stored in a projection view memory (26). A reconstruction processor (38) reconstructs the projection views into a volumetric image representation that is stored in a volumetric image memory (40). A reprojector (42) reprojects the volumetric image and volume of interest along each projection angle producing a set of reprojection views and regions of interest. A view comparator (50) compares each corresponding projection and reprojected view within the region of interest along a common projection direction. A translator (52) translates or offsets each projection view in accordance with the comparison to produce a corrected or s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.