Computed tomography from ordinary radiographs for teleradiology

Computed tomography (CT) can be achieved inexpensively using ordinary x-ray equipment available at most primary health care centers. We present here the techniques and initial results of experiments with an overhead x-ray unit and film as means for collecting projection data for CT. Our algorithms include standard ART (algebraic reconstruction technique) and modifications we have derived to prevent streaking artifacts due to the use of a small number of views, and to correct geometric distortion due to limited angular coverage. Our methods enable remote computed tomography via teleradiology.