US 11,656,312 B2
Method for correcting magnetic resonance imaging error using heart rate interval
Song Yi Lee, Seoul (KR); and Jae Yoon Shim, Hanam-si (KR)
Assigned to PHANTOMICS INC., Seoul (KR)
Filed by PHANTOMICS Inc., Seoul (KR)
Filed on Sep. 2, 2021, as Appl. No. 17/464,864.
Claims priority of application No. 10-2020-0112210 (KR), filed on Sep. 3, 2020; application No. 10-2021-0089464 (KR), filed on Jul. 8, 2021; and application No. 10-2021-0114562 (KR), filed on Aug. 30, 2021.
Prior Publication US 2022/0065966 A1, Mar. 3, 2022
Int. Cl. G01R 33/56 (2006.01); A61B 5/024 (2006.01); G01R 33/58 (2006.01); G01R 33/50 (2006.01)
CPC G01R 33/5608 (2013.01) [A61B 5/024 (2013.01); G01R 33/50 (2013.01); G01R 33/586 (2013.01)] 14 Claims
OG exemplary drawing
1. A method for correcting a magnetic resonance imaging error using a heart rate interval, comprising:
measuring T1 of a stand-alone phantom for correcting the error;
obtaining a T1 map generated by mapping a recovery time according to a reference recovery rate of protons in heart tissues of a subject inverted by a radio frequency (RF) pulse in pixel units into a two-dimensional space;
calculating a correction function based on the measured T1 of the phantom; and
correcting an error of the T1 map based on the calculated correction function,
wherein in the measuring of the T1, first T1 of the phantom is measured using a modified look-locker inversion recovery (MOLLI) sequence, and second T1 of the phantom is measured using an inversion recovery turbo spin echo and a MOLLI sequence, and
wherein in the calculating of the correction function, a first correction function is calculated through multiple polynomial regression based on reference T1 and the second T1 of the phantom, and the reference T1 is a ground-truth that becomes a reference of the measured T1 of the phantom.