Geometrical transformations preserving list-mode format
US8515148B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2009 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Nov 24, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A diagnostic imaging device includes detector elements (16) for detecting γ-rays indicative of nuclear decay events. The detected γ-rays are used to produce lines of response (LORs) (46), which are time stamped (20) and stored in list mode. The LORs are reconstructed (34) into an image. An image analysis processor (38) analyzes the image for motion artifacts and iteratively adjusts an event transform processor (30) to transform selected LORs to minimize the motion artifacts. If the transformed LOR (50) does not correspond with a pair of detector elements (16), closest detector elements (52, 54) are determined. Candidate LORs (62) are created between the closest and neighboring detector elements. An event location (40) on an LOR (46) is determined from the time-of-flight (TOF) information and then transformed (47) to generate a transformed event location (48). The candidate LOR (62) which most nearly intersects the transformed event location (40) and the appropriately updated TOF information is selected for use in image reconstruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.