On-line correction of patient motion in three-dimensional positron emission tomography
US6980683B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 25, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Feb 6, 2024 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1127
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device and method for on-line correction of patient motion in three-dimensional positron emission tomography. The devices encompass an on-line hardware pipelining architecture to support 3D translation, normalization, and weighted histogramming as required. Five stages of processing for the PET event stream are utilized in the present invention. Each stage feeds the next with progressively modified event packets proceeding at a processing speed of at least 10M packets/sec. Stage 1 calculates an event correction factor (ECF) for each incoming detector-pair event packet. This ECF is incorporated into the event packet for use later in Stage 5. Stage 2 converts the detector-index-pair content of each packet into (x,y,z) pair content. Specifically, the representation of each detector element is converted from a discrete crystal index into a 3-D coordinate index. Stage 3 transforms the (x,y,z) pair into an (x′,y′,z′) pair. Stage 4 converts the (x′,y′,z′) pair into a bin address. Output from Stage 5 is a normalized projection data set available at the end of each acquisition frame. Stage 5 performs on-line weighted histogramming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.