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Positron CT apparatus and a reconstruction method
US8975587B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8975587-B2 |
| Application number | US-201213980865-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 15, 2012 |
| Priority date | Mar 10, 2011 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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When calculating a system matrix (detection probability), adjustment is made by fitting a point spread function (PSF) expressed by a Gauss function to a profile of count values of radiation with respect to a distance from a point source which emits radiation of the same type as the positron-emitting drug, and a distance range of the above PSF is adjusted for each layer in a depth direction of gamma-ray detectors indicating an incident direction in which the radiation strikes. By calculating the system matrix (detection probability) after adjusting the distance range of the function for each layer, improvement can be made in image quality of a reconstructed image.
First claim
Opening claim text (preview).
The invention claimed is: 1. A positron CT apparatus having: a plurality of detectors for detecting radiation released from a positron-emitting drug given to a subject, and outputting electric signals; a coincidence counting circuit for detecting, based on the electric signals, that a simultaneous observation of the radiation is made in two of the detectors; a system matrix calculating device for calculating a system matrix based on outputs of the coincidence counting circuit;…
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Human Necessities · mapped topic
Physics · mapped topic
Physics · mapped topic
Human Necessities · mapped topic
- A61B5/0033Primary
Human Necessities · mapped topic
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- What does patent US8975587B2 cover?
- When calculating a system matrix (detection probability), adjustment is made by fitting a point spread function (PSF) expressed by a Gauss function to a profile of count values of radiation with respect to a distance from a point source which emits radiation of the same type as the positron-emitting drug, and a distance range of the above PSF is adjusted for each layer in a depth direction of g…
- Who is the assignee on this patent?
- Yamada Yoshihiro, Shimadzu Corp
- What technology area does this patent fall under?
- Primary CPC classification A61B5/0033. Mapped technology areas include Human Necessities.
- When was this patent published?
- Publication date Tue Mar 10 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).