= D. R. Enzmann
{c}
\b[D. R. Enzmann] is the radiologist credited under that byline as first author of <Normal flow patterns of intracranial and spinal cerebrospinal fluid defined with phase-contrast cine MR imaging by D. R. Enzmann and others>. With <N. J. Pelc>, Enzmann reported measurements of moving <cerebrospinal fluid>, using <magnetic resonance imaging> to investigate physiology as well as anatomical appearance.<Normal flow patterns of intracranial and spinal cerebrospinal fluid defined with phase-contrast cine MR imaging by D. R. Enzmann and others>[Radiology 178 (1991), 467–474; verified byline and abstract.]{ref}
The study examined ten healthy volunteers and four patients whose conventional MR images were normal. Peripheral gating produced sixteen quantitative flow-encoded images over the <cardiac cycle>. Measurements distinguished the timing of fluid motion in ventricular and subarachnoid spaces, demonstrating why static anatomy alone does not describe pulsatile movement.<Normal flow patterns of intracranial and spinal cerebrospinal fluid defined with phase-contrast cine MR imaging by D. R. Enzmann and others>[Abstract: participant groups, peripheral gating and regional flow timing.]{ref}
The methodological contribution is an example of turning image contrast into a physiological measurement. Direction-sensitive signals and repeated sampling across a heartbeat distinguish oscillatory motion from a compartment that simply looks fluid-filled. The reported display convention assigned opposite intensities to opposite craniocaudal directions; that convention belongs to the acquisition and is not a universal rule for brightness in every MR image.
The initials are retained as verified in the original research record. The paper establishes authorship and the reported results; it does not separately document which apparatus component or analysis step each coauthor personally performed.
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