Signal amplitude feature-based method for fast reconstructing a magnetic particle imaging and device
US12136145B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2022 |
| Grant date | Nov 5, 2024 |
| Priority date | — |
| Expiry date | Jul 13, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/0094
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure includes: transforming a time-domain voltage signal collected by an MPI system device to a frequency domain; calculating a square root of a square sum of a real part and an imaginary part at each frequency point of a frequency domain signal; arranging acquired amplitudes in a descending order, and acquiring a screening threshold by an amplitude ratio method; screening an amplitude through the screening threshold and constructing frequency domain signal data; acquiring a row vector of a system matrix corresponding to each frequency point of the data, so as to construct an update system matrix; and solving, based on the frequency domain signal array and the update system matrix, an inverse problem in a form of a least square based on an L2 constraint to obtain a three-dimensional magnetic particle concentration distribution result, so as to achieve a fast reconstruction of the MPI system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.