Spin warp NMR imaging and applications to human whole-body imaging

TLDR

The authors introduce “spin warp imaging,” a novel NMR technique for whole‑body imaging. The system employs a four‑coil, air‑cored 0.04 T magnet producing a 1.7 MHz proton frequency, a pulse sequence tailored for whole‑body imaging, and achieves a field inhomogeneity of 6×10⁻⁴ at 0.23 m. They demonstrate the technique’s application to human whole‑body imaging.

Abstract

Describes a new nuclear magnetic resonance (NMR) imaging technique which the authors call 'spin warp imaging' and gives examples of its application to human whole-body imaging. The apparatus is based on a four-coil, air cored magnet (made by the Oxford Instrument Company) capable of accepting the whole human body. The magnet produces a static field of 0.04 T giving a proton NMR frequency of 1.7 MHz. The maximum field inhomogeneity is about 6*10-4 at a radius of 0.23 m, approximately twice the amount theoretically attainable with this configuration. The pulse sequence used is shown.