METHOD AND MAGNETIC RESONANCE APPARATUS TO DETERMINE A SENSITIVITY PROFILE OF A LOCAL COIL

摘要

In a method for the determination of sensitivity profiles of local coils in the acquisition of magnetic resonance data, a first measurement data set of an examination area is acquired with a first acquisition coil, a second measurement data set of the examination area is acquired with a local coil, and a sensitivity profile of the local coil that is used is determined on the basis of the first measurement data set and the measurement data set. The first measurement data set and the second measurement data set are acquired using a pulse sequence with ultrashort echo times. In the determination of the sensitivity profile, errors due to dephasings are avoided as best as possible by the acquisition of the measurement data sets with a pulse sequence with ultrashort echo times (i.e. in particular echo times TE shorter than 0.5 ms); in particular, the dephasings are smaller given these echo times than in the case of gradient echo (GRE)-based pulse sequences.

主权项

1. A method to determine a sensitivity profile of a local coil in a magnetic resonance apparatus, comprising:
operating a magnetic resonance apparatus using a pulse sequence having ultrashort echo times to acquire a first measurement data set of an examination area using a radio-frequency (RF) acquisition coil of the magnetic resonance apparatus; operating the magnetic resonance apparatus using said pulse sequence with ultrashort echo times to acquire a second measurement data set of the examination area with a local coil in the magnetic resonance apparatus; providing said first measurement data set and said second measurement data set to a computer and, in said computer, determining a sensitivity profile of the local coil from the first measurement data set and the second measurement data set; and in said computer, generating an electronic signal representing said sensitivity profile of the local coil, and making said electronic signal available at an output of said computer.