Fast dual contrast MR imaging

摘要

The invention relates to a method of MR imaging of at least a portion of a body (10) of a patient placed in an examination volume of a MR device (1). The method comprises the steps of: -subjecting the portion of the body (10) to a first imaging sequence for acquiring a first signal data set (31, 32) from a central portion of k-space, wherein magnetic resonance is excited by means of RF pulses having a large flip angle (α1); -subjecting the portion of the body (10) to a second imaging sequence for acquiring a second signal data set (33, 34) from the central portion of k-space, wherein magnetic resonance is excited by means of RF pulses having a small flip angle (α2); -subjecting the portion of the body (10) to a third imaging sequence for acquiring a third signal data set (35, 36) at least from a peripheral portion of k-space, wherein magnetic resonance is excited by means of RF pulses having an intermediate flip angle (α 3); -reconstructing a first MR image (37) from a combination of the first signal data set (31, 32) and the third signal data set (35, 36) and -reconstructing a second MR image (38) from a combination of the second signal data set (33, 34) and the third signal data set (35, 36).

主权项

1. A method of magnetic resonance (MR) imaging of at least a portion of a body of a patient placed in an examination volume of a MR device, the method comprising the steps of:
subjecting the portion of the body to a first imaging sequence for acquiring a first signal data set limited to a central portion of k-space, wherein magnetic resonance is excited by means of radio frequency (RF) pulses having a large flip angle (α1); subjecting the portion of the body to a second imaging sequence for acquiring a second signal data set limited to the central portion of k-space, wherein magnetic resonance is excited by means of RF pulses having a small flip angle (α2); subjecting the portion of the body to a third imaging sequence for acquiring a third signal data set at least from a peripheral portion of k-space, wherein magnetic resonance is excited by means of RF pulses having an intermediate flip angle (α3); reconstructing a first MR image from a combination of the first signal data set and the third signal data set; reconstructing a second MR image from a combination of the second signal data set and the third signal data set.