Method for the Technical Evaluation of Ruggedization of a CT Scanner

摘要

A linear finite element model was created to predict the response of a prototyperuggedized CT scanner system's components when exposed to extremes of the logistical environment. Ruggedization consisted of mounting components (operator console, patient table, and scanning gantry) of the commercial scanner individually on wire rope shock isolator assemblies inside a single-side-expandable ISO shelter in its stowed configuration. Clinical use requires expansion of the shelter, movement of the patient table into the expanded section, and lowering of the gantry down off its isolation mounts onto the shelter floor. The prototype's shock isolation system performance was characterized in the analysis. Dynamic response to three logistical inputs was calculated: vertical drop, rail impact, and lateral impact. The presence of gravity was modeled so that static offsets would be present prior to simulated shock exposures. The calculated responses included scanner component deflections and accelerations, shelter floor deflections and stresses, and stresses in the floor subframe. Issues such as adequacy of sway space zones, overtravel of the isolators, and damped vibration amplitudes in transportation vibration were analyzed. Ruggedization, CT Scanner, Linear finite element analysis, Commercial, Analysis.