MAGNETIC RESONANCE IMAGING WITH DYNAMIC INVERSION PREPARATION

摘要

A magnetic field may be applied to a subject having a plurality of tissues, including first and second tissues, causing a net longitudinal magnetization in the tissues. An inversion radio frequency pulse may be generated to invert the longitudinal magnetization from the tissues. Heart-rate timing information associated with a current ECG of the subject may be measured, and an inversion time TI may be dynamically calculated based at least in part on the heart-rate timing information. An excitation radio frequency pulse may then be generated. The generation of the excitation radio frequency pulse may occur a period of time after the generation of the inversion radio frequency pulse, and the period of time may be based on the dynamically calculated inversion time TI. Magnetic resonance imaging data may then be acquired.

主权项

1. A method for generating a magnetic resonance image, the method comprising:
applying a magnetic field to a subject, the subject having a plurality of tissues including a first tissue and a second tissue, wherein the magnetic field causes a net longitudinal magnetization in the plurality of tissues; generating an inversion radio frequency pulse configured to invert the longitudinal magnetization from the plurality of tissues; measuring heart-rate timing information associated with a current ECG of the subject; dynamically calculating an inversion time TI based at least in part on the heart-rate timing information; generating an excitation radio frequency pulse, said generation of the excitation radio frequency pulse occurring a period of time after said generation of the inversion radio frequency pulse, the period of time being based on the dynamically calculated inversion time TI; and acquiring magnetic resonance imaging data.