US 2019/0101608 A1 · SYSTEMS AND METHODS FOR MODIFYING EXCITATION RADIO FREQUENCY PULSE

Abstract

A method for modifying RF pulse infidelity is provided. The method may include obtaining a designed time-domain waveform. The method may also include directing a radio frequency power amplifier (RFPA) of a magnetic resonance imaging (MRI) scanner to generate an output RF pulse based on the designed time-domain waveform. The method may also include measuring an output time-domain waveform of the output RF pulse. The method may also include determining, based on the designed time-domain waveform and the output time-domain waveform, a modified time-domain waveform corresponding to an excitation RF pulse. The method may also include directing the MRI scanner to generate, using a waveform generator and the RFPA and based on the modified time-domain waveform, the excitation RF pulse to excite one or more slices of an object in an MRI scan.

Claims22

Dependent claims

A system, comprising:

one or more storage devices storing a set of instructions;
and
one or more processors configured to communicate with the storage device, wherein when executing the set of instructions, the system is caused to:
obtain a designed time-domain waveform;
direct a radio frequency power amplifier (RFPA) of a magnetic resonance imaging (MRI) scanner to generate an output RF pulse based on the designed time-domain waveform;
measure an output time-domain waveform of the output RF pulse;
determine, based on the designed time-domain waveform and the output time-domain waveform, a modified time-domain waveform corresponding to an excitation RF pulse;
and
direct the MRI scanner to generate, using a waveform generator and the RFPA and based on the modified time-domain waveform, the excitation RF pulse to excite one or more slices of an object in an MRI scan.

6 more elements

A method implemented on a computing device having one or more processors and one or more storage devices, the method comprising:

obtaining a designed time-domain waveform;
directing a radio frequency power amplifier (RFPA) of a magnetic resonance imaging (MRI) scanner to generate an output RF pulse based on the designed time-domain waveform;
measuring an output time-domain waveform of the output RF pulse;
determining, based on the designed time-domain waveform and the output time-domain waveform, a modified time-domain waveform corresponding to an excitation RF pulse;
and
directing the MRI scanner to generate, using a waveform generator and the RFPA and based on the modified time-domain waveform, the excitation RF pulse to excite one or more slices of an object in an MRI scan.

3 more elements

Dependencies are inferred from the claim text.

Systems and methods for modifying excitation radio frequency pulse

Life of this patent

Systems and methods for modifying excitation radio frequency pulse

Life of this patent

Abstract

Claims22