Collimator-free photon tomography
US5818050A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1997 |
| Grant date | Oct 6, 1998 |
| Priority date | — |
| Expiry date | Apr 7, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/037
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of uncollimated single photon emission computed tomography includes administering a radioisotope to a patient for producing gamma ray photons from a source inside the patient. Emissivity of the photons is measured externally of the patient with an uncollimated gamma camera at a plurality of measurement positions surrounding the patient for obtaining corresponding energy spectrums thereat. Photon emissivity at the plurality of measurement positions is predicted using an initial prediction of an image of the source. The predicted and measured photon emissivities are compared to obtain differences therebetween. Prediction and comparison is iterated by updating the image prediction until the differences are below a threshold for obtaining a final prediction of the source image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.