Methods for nmr angiography

摘要: Magnetic field gradient and radio-frequency (RF) pulse signal sequences permitting moving nuclear spins to be selectively detected then displayed as projected angiographic data in a magnetic resonance (NMR) image, without the use of contrast agents. The method allows intensity an image pixel determined by macroscopic spin velocity can provide essentially complete suppression non-moving spins. Resulting images have high signal-intensity dynamic range for vessels. selected detection flows is not dependent upon pulsatile flow so that venous arterial structures are equally well visualized high-resolution NMR images.