Method for decomposing scintigraphic images into total absorption and diffused components
US5796860A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 3, 1996 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Sep 3, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/4258
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method of decomposition into one component {f.sub.1 }, called the total absorption component, and one component {f.sub.k } called the diffused component of energy spectra {t.sub.i } for N image elements i of a scintigraphic image. The method of decomposition includes the steps of: PA1 a) sampling the energy in the form of P samples j; PA1 b) recording the values t.sub.i (j) of each spectrum {t.sub.i }; PA1 c) constructing the table Y of the t.sub.i' (j) values; PA1 d) determining the base of specific vectors {v.sub.q } (q=0, 1, 2, . . . , P-1) that are specific orthogonal vectors of the matrix Y, classified by order of decreasing values; PA1 e) determining the K fundamental spectra {f.sub.k } in the space generated by the Q (Q.ltoreq.P) first specific vectors {v.sub.q } by applying appropriate constraints to the coefficients b.sub.kq defined by: ##EQU1## f) projecting the image element spectra {t.sub.i } onto the base of the fundamental spectra {f.sub.k } to obtain the decomposition sought.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.