evidence in the form of objects (as pictures, diagrams, or models) that has in itself no probative value but is used to illustrate and clarify the factual matter at issue
Radiological Demonstrative Evidence
An important purpose of an expert witness in the courtroom is to teach the jury and to interpret the facts. In legal cases involving medical issues, displays of imaging data facilitate the task of teaching by presenting visual representations of the relevant findings. Radiology, in particular, lends itself to courtroom presentations by virtue of its photographic qualities.
Pertinent images must be isolated and presented in a manner that can be grasped by lay jurors with no understanding of the technology, or frame of reference to the spectrum of normal and abnormal. This can be facilitated by judicious selection of the relevant images, focusing in on the areas of interest, and color coding and annotating the images.
A radiologist is required to make these determinations, and also to insure that the representations accurately reflect the truth in the case.
Such distillations of complicated imaging information into memorable graphic interpretation that would have relevance to a jury of laypersons, and that remain scientifically true to the evidence, is an outcome that many legal duplicating services cannot provide. Other services may simply reproduce images without any real understanding of the relevant medical facts or imaging subtleties and nuances.
Our goal is not simply to present a “show and tell” display, but to teach the jury or trier of fact. We try to give you and your experts the necessary framework to convey the relevant imaging findings in the proper context of normal vs. abnormal, underlying pathology, and degree of significance or non-significance of the underlying condition.