SYSTEM AND METHOD FOR ADAPTIVE DICTIONARY MATCHING IN MAGNETIC RESONANCE FINGERPRINTING

摘要

Systems and methods for estimating quantitative parameters of a subject from data acquired using a magnetic resonance imaging (MRI) system. MR data acquired with an MRI system is provided, which represents a plurality of different signal evolutions acquired using different acquisition parameter settings. An initial dictionary comprising a plurality of signal templates is generated that coarsely sample acquisition parameters used when acquiring the provided MR data. The MR data is compared with the initial dictionary. The quantitative parameters associated with an entry in the initial dictionary are stored as the estimated quantitative parameters when the comparison satisfies a threshold criterion and the initial dictionary is updated when the comparison does not satisfy the threshold criterion.

主权项

1. A method for estimating quantitative parameters of a subject using a magnetic resonance imaging (MRI) system, the steps of the method comprising:
(a) providing MR data acquired with an MRI system, the acquired MR data representing a plurality of different signal evolutions acquired using different acquisition parameter settings; (b) generating an initial dictionary comprising a plurality of signal templates that coarsely sample acquisition parameters used when acquiring the provided MR data; (c) comparing the provided MR data with the initial dictionary and:
(i) storing the quantitative parameters associated with an entry in the initial dictionary as the estimated quantitative parameters when the comparison satisfies a threshold criterion; and(ii) updating the initial dictionary when the comparison does not satisfy the threshold criterion, and wherein step (c) is repeated using the updated dictionary.