Michael F. Gard

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PURPOSE To evaluate a gating system, called predictive respiratory gating (PRG), that reduces motion-induced artifacts on computed tomographic (CT) scans of patients who cannot suspend respiration. MATERIALS AND METHODS PRG uses a respiration monitor and a new algorithm to predict when a motionless period is about to occur. It automatically starts(More)
Users of scintigraphic computer systems manufactured by Medical Data Systems (MDS) frequently experience textured distortion of oscilloscope images when scans are produced by Z-axis modulation. The source of this malfunction has been identified and a way to eliminate the problem is described. The modification is simple and inexpensive. The availability of(More)
on the challenges of installing instrumentation in the wild. Because of the large variety of physical, chemical, and biological assaults to which the instrumentation may be subjected, we divided the material between two issues of the magazine. In this issue, we introduce problems with physical extremes and attacks by insects, critters, and human beings. In(More)
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