Defense counsel usually pounce on "negative" x-rays, i.e., ones which show little or no change from before to after the accident. They triumphantly parade admissions from medical witnesses that "the x-rays in the case are totally negative," before a jury which is enormously impressed through abysmal ignorance of what x-rays can and do show. Thus, the problem facing counsel for the injured party is how most persuasively to acquaint the jury with means of properly evaluating x-rays in view of their significant attributes and their deficiencies. Plaintiff's counsel must somehow explain the purpose of x-rays, augment their limited information, and/or present in a different manner maladies or structures which are invisible on x-rays.
Lawrence V. Hastings, Positive handling of the Negative X-Ray, 14 Clev.-Marshall L. Rev. 107 (1965)