(FASE) See Fast Spin Echo and FASE Acquisition Double Echo.

(FFE) An echo signal generated from a FID by means of a bipolar switched magnetic gradient. The preparation module of the pulse sequence consists of an excitation pulse. The magnetization tilts by a flip angle between 0° and 90°.

See Gradient Echo Sequence and Refocused Gradient Echo Sequence.

(FFT) A particularly fast and efficient computational method of performing a Fourier transformation, which is the mathematical process by which raw data is processed into a usable image.

(FGRE) The fast gradient recalled echo sequence belong to the refocused gradient echo sequences.

See Gradient Echo Sequence.

(FIESTA) The fast imaging employing steady state acquisition sequence provides images of fluid filled structures with very short acquisition times. The FIESTA sequence uses the T2 steady state contrast mechanism to provide high SNR images with strong signal from fluid tissues while suppressing background tissue for contrast and anatomic detail of small structures. In addition, the ultra short TR and TE enable extremely short acquisition times - shorter than FSE - and the images can be post processed using MIP, volume rendering, or 3D navigator techniques.

See Steady State Free Precession.