MAGNETIC RESONANCE ANGIOGRAPHY METHOD AND APPARATUS

摘要

In a magnetic resonance angiography method and apparatus, a time-of-flight sequence is used to acquire and enter k-space data, and a magnetic resonance angiography image is reconstructed from the k-space data. The time-of-flight sequence includes at least one saturation radio frequency pulse and multiple excitation radio frequency pulses. At least two of the excitation radio frequency pulses directly follow the saturation radio frequency pulse, and part of the k-space data is collected after each of the excitation pulses. Scanning time can thus be decreased, scanning efficiency can be improved, the electromagnetic absorption ratio can be reduced, and a venous magnetic resonance signal is still suppressed.

主权项

1. A magnetic resonance angiography method, comprising:
operating a magnetic resonance scanner to execute a time-of-flight sequence to acquire magnetic resonance data from a subject situated in the scanner by radiating at least one saturation radio frequency pulse and multiple excitation radio frequency pulses, with at least two of said excitation radio frequency pulses directly following said saturation review of frequency pulse, and entering said magnetic resonance data into a memory as k-space data after each of said excitation pulses; and in a processor, accessing said k-space data in said memory and reconstructing a magnetic resonance angiography image therefrom, and making the magnetic resonance angiography image available in electronic form at an output of said processor, as a data file.