The Influence of Diffusion Time on the Measurement of the Short-Range 3He Diffusivity in Human Lungs

Keywords

academic account accounting accurately acquisitions airway airways apparent approval assess averaging body boundaries breath broad capacity coefficient coil complexity computer confirm consecutively consequence considerably consisted consisting constant correction correctly cylinder decreased decreases degree delay dependence dependent depletion describe determined development diffuses diffusion diffusivity dimensions emphysema emphysematous equations error errors estimation ethics even exhaled expected experimental experimentally exploited explored exponential extract fall fitted freely function future geometry gradient gradients healthy human identified important in vivo incompletely increasing independent index indicate inflation influence inhalation inhalations inhaled inner intercept interleave interleaved investigated kingdom lack limitations linear local localizer long lung lungs maps martin matrix mixture model models motional nature necessary normalized outer plan planned position predicted predictions presence press previously produced produces proposed pulses radiology radius recreate reliable remain remained reproducible residual rise scales sets short significantly simplified simulations since slice slices spoiled strength strong structural subject subjects susceptibility system unit validation variations volunteer volunteers whole