THE REGENTS OF THE UNIVERSITY OF CALIFORNIA; BERKELEY
发明人:
GOODWILL, PATRICK W.,GONOLLY, STEVEN M.
申请号：
EP09798250
公开号：
EP2317916A4
申请日:
2009.06.23
申请国别(地区):
EP
年份:
2015
代理人:
摘要：
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.
