Variable-rate selective excitation for rapid MRI sequences

Improved Slice Profile and Reduced Fast Spin Echo Spacing with Variable-Rate Selective Excitation

The Variable-Rate Selective Excitation (VERSE) technique is shown to improve image quality by reducing fast spin echo spacing and improving slice profile. An algorithm was developed to use VERSE waveform reshaping to minimize echo spacing given specific prescription parameters and system constraints and was implemented for an SSFSE sequence to create shorter RF pulses with higher time•bandwidth...

A Full-Fuzzy Rate Controller for Variable Bit Rate Video

In this paper, we propose a new full-fuzzy video ratecontrol algorithm (RCA) for variable bit rate (VBR) videoapplications. The proposed RCA provides high qualitycompressed video with a low degree computational complexity.By controlling the quantization parameter (QP) on a picturebasis, it produces VBR video bit streams. The proposed RCAhas been implemented on the JM H.264/AVC video codec andth...

Compression of individual sequences via variable-rate coding

a full-fuzzy rate controller for variable bit rate video

in this paper, we propose a new full-fuzzy video ratecontrol algorithm (rca) for variable bit rate (vbr) videoapplications. the proposed rca provides high qualitycompressed video with a low degree computational complexity.by controlling the quantization parameter (qp) on a picturebasis, it produces vbr video bit streams. the proposed rcahas been implemented on the jm h.264/avc video codec andth...

Mri Sequences

An MRI sequence is an ordered combination of RF and gradient pulses designed to acquire the data to form the image. In this chapter I will describe the basic gradient echo, spin echo and inversion recovery sequences used in MRI. The data to create an MR image is obtained in a series of steps. First the tissue magnetisation is excited using an RF pulse in the presence of a slice select gradient....