US 11,953,561 B2
Methods and apparatuses related to magnetic relaxometry measurements in the presence of environmental response to magnetic excitation
Todor Karaulanov, Boulder, CO (US); and Giulio D Paciotti, Albuquerque, NM (US)
Assigned to Imagion Biosystems, Inc., San Diego, CA (US)
Filed by Imagion Biosystems Inc., San Diego, CA (US)
Filed on Dec. 8, 2022, as Appl. No. 18/063,285.
Application 18/063,285 is a continuation of application No. 17/464,663, filed on Sep. 1, 2021, granted, now 11,550,002.
Application 17/464,663 is a continuation of application No. 16/496,428, granted, now 11,137,454, previously published as PCT/US2018/025702, filed on Apr. 2, 2018.
Claims priority of provisional application 62/480,491, filed on Apr. 2, 2017.
Prior Publication US 2023/0107657 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G01R 33/02 (2006.01); G01R 33/12 (2006.01)
CPC G01R 33/0213 (2013.01) [G01R 33/1276 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A magnetic relaxometry measurement apparatus, comprising:
a magnetizing system configured to supply a pulsed magnetic fields to a sample; a sensor system configured to detect magnetic fields produced by induced magnetization of the sample after a magnetic field pulse from the magnetizing system; and one or more compensating coils configured to suppress generation of eddy currents in an environment surrounding the apparatus due to the pulsed magnetic field,
wherein the magnetizing system is configured to provide magnetization pulse sequence comprising a magnetizing field of a first magnitude on for a first time and off for a second time, to use the one or more compensating coils to provide a compensation pulse of a third magnitude on for a third time and off for a fourth time, and to use the sensor system to detect a magnetization of the sample during the second time.