US 11,054,392 B2
Techniques for magnetic particle imaging
Patrick W. Goodwill, San Francisco, CA (US); and Steven M. Conolly, Palo Alto, CA (US)
Assigned to The Regents of the University of California, Oakland, CA (US)
Filed by The Regents of the University of California, Oakland, CA (US)
Filed on Jul. 20, 2018, as Appl. No. 16/40,801.
Application 14/328,560 is a division of application No. 12/737,214, granted, now 8,847,592, issued on Sep. 30, 2014, previously published as PCT/US2009/003764, filed on Jun. 23, 2009.
Application 16/040,801 is a continuation of application No. 14/328,560, filed on Jul. 10, 2014, granted, now 10,048,224.
Claims priority of provisional application 61/074,931, filed on Jun. 23, 2008.
Prior Publication US 2019/0212298 A1, Jul. 11, 2019
Int. Cl. G01N 27/72 (2006.01); A61B 5/05 (2021.01); A61B 5/0515 (2021.01); G01R 33/12 (2006.01); G01R 33/02 (2006.01); G01R 33/00 (2006.01); A61B 5/00 (2006.01); G01R 33/10 (2006.01)
CPC G01N 27/72 (2013.01) [A61B 5/05 (2013.01); A61B 5/0515 (2013.01); G01R 33/00 (2013.01); G01R 33/0213 (2013.01); G01R 33/10 (2013.01); G01R 33/1269 (2013.01); G01R 33/1276 (2013.01); A61B 5/7257 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A magnetic particle imaging device, comprising:
a pair of magnets arranged proximate an imaging region of the magnetic particle imaging device, the pair of magnets being configured to produce a gradient magnetic field within the imaging region of the magnetic particle imaging device such that the gradient magnetic field will have a field-free line (FFL);
an excitation magnet configured to produce an excitation magnetic field that induces a signal from an object under observation that contains magnetic tracer,
a receiver arranged proximate the imaging region, the receiver being configured to receive the signal from the magnetic tracer in the imaging region; and
a signal processor configured to be in communication with the receiver, the signal processor being configured to convert the signal into an image of the magnetic tracer,
wherein the pair of magnets is constructed such that each magnet has a longer dimension substantially parallel to the FFL and a shorter dimension substantially perpendicular to the FFL.