EXPERIMENTAL-VERIFICATION OF INHOMOGENEOUS LINE-BROADENING CALCULATIONS IN LUNG MODELS AND OTHER INHOMOGENEOUS STRUCTURES

Experimental measurements of nuclear magnetic resonance lineshapes in physical models (slabs, cubes, and cubical shells) of water in hollow plastic containers were performed to validate theoretical methods for calculating lineshapes in models of the lung. Measured values are in excellent agreement with previously reported calculated values. This work demonstrates that the diamagnetic properties of water in a particular geometry can cause the lineshape to have a rich structure characterized by several peaks. The prominent characteristics of the lineshapes are explained in terms of perturbation of the magnetic flux density by interfaces between materials of different magnetic susceptibilities. © 1992.