Techniques for magnetic particle imaging
US8847592B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2009 |
| Grant date | Sep 30, 2014 |
| Priority date | — |
| Expiry date | May 2, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7257
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A magnetic particle imaging apparatus includes magnets [106,107] that produce a gradient magnetic field having a field free region (FFR), excitation field electromagnets [102,114] that produce a radiofrequency magnetic field within the field free region, high-Q receiving coils [112] that detect a response of magnetic particles in the field free region to the excitation field. Field translation electromagnets create a homogeneous magnetic field displacing the field-free region through the field of view (FOV) allowing the imaging region to be scanned to optimize scan time, scanning power, amplifier heating, SAR, dB/dt, and/or slew rate. Efficient multi-resolution scanning techniques are also provided. Intermodulated low and radio-frequency excitation signals are processed to produce an image of a distribution of the magnetic nanoparticles within the imaging region. A single composite image is computed using deconvolution of multiple signals at different harmonics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.