US 12,324,686 B2
Method and system for detecting movement of at least one part of a subject
Peter Speier, Erlangen (DE); and Patrick Liebig, Erlangen (DE)
Assigned to Siemens Healthineers AG, Forchheim (DE)
Filed by Siemens Healthcare GmbH, Erlangen (DE)
Filed on May 11, 2022, as Appl. No. 17/742,388.
Claims priority of application No. 21173644 (EP), filed on May 12, 2021.
Prior Publication US 2022/0361822 A1, Nov. 17, 2022
Int. Cl. A61B 5/00 (2006.01); A61B 5/055 (2006.01); G01R 33/3415 (2006.01); G01R 33/36 (2006.01); G01R 33/54 (2006.01); G01R 33/565 (2006.01); G01R 33/567 (2006.01)
CPC A61B 5/721 (2013.01) [A61B 5/055 (2013.01); G01R 33/3415 (2013.01); G01R 33/3621 (2013.01); G01R 33/543 (2013.01); G01R 33/56509 (2013.01); G01R 33/5673 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for detecting movement of at least one part of a subject being located inside a magnetic resonance imaging device, wherein the magnetic resonance imaging device comprises a parallel transmit system having multiple channels, the parallel transmit system being configured to transmit magnetic resonance excitation pulses via an RF transmit coil array, and a receive system that is configured to receive magnetic resonance signals via an RF receive coil, the method comprising:
performing a magnetic resonance scan, the performing of the magnetic resonance scan comprising executing a programmable magnetic resonance sequence protocol, wherein the programmable magnetic resonance sequence protocol comprises magnetic resonance excitation pulses to be transmitted via the parallel transmit system and receive time windows for receiving magnetic resonance signals via the receive system, wherein the programmable magnetic resonance sequence protocol comprises, in between the magnetic resonance excitation pulses, generation of multi-channel pilot tone signals;
transmitting the multi-channel pilot tone signals via the parallel transmit system and the RF transmit coil array;
during the transmission of the multi-channel pilot tone signals, receiving the pilot tone signals with the RF receive coil;
forwarding the received pilot tone signals via the receive system to an analyzing unit; and
determining movement of at least one part of the subject, the determining of the movement of the at least one part of the subject comprising analyzing the received pilot tone signal at the analyzing unit,
wherein the pilot tone signals have an amplitude that is 100 to 5000 times smaller than an amplitude of an average magnetic resonance excitation pulse.