A series of studies were carried out at Alice Springs Hospital to investigate medical imaging technologist's (MIT's) accuracy in detecting both normal and abnormal pathological conditions on radiographs. A further assessment was made, in the final study, of their ability to provide a provisional diagnosis using the Red Dot System. A total of 940 radiological examinations were reviewed over a five year period. The full range of examinations conducted in the department, including both CT and ultrasound, were recorded. Three separate surveys were carried out in 1992, 1994 and 1997. Throughout the study the MIT's detection and provisional diagnosis rate were compared to the Radiologists' 'gold standard' reports. An overall average of 91.2 per cent accuracy in determining normal/abnormal radiographs was reported by the MIT's. An accuracy rate of 85 per cent in the provisional diagnosis of the abnormal radiographs was obtained. This high level of accuracy by MIT's indicates that the Red Dot System should not only be encouraged but actively promoted. (author abstract)