Abstract: Apparatus for taking dental x-rays used in performing subtraction radiography, includes an appliance for holding a dental x-ray film at a fixed position with respect to the teeth of a person, the appliance including a dental mold for holding the appliance in a fixed position on the teeth of the person, and a connecting member for holding the x-ray film in a fixed position relative to the teeth of the person and being mounted to the mold such that the x-ray film is positioned in the mouth at a set position; a magnetic source mounted at a fixed position in a room for producing a time-varying low frequency magnetic field; a magnetic sensor for sensing the magnetic field and for producing an output signal in response thereto, the magnetic sensor being mounted to the connecting member so as to be fixed in position relative to the x-ray film; an x-ray source for exposing the x-ray film; a robot manipulator having at least five degrees of freedom for moving the x-ray source in relation to the x-ray film, and having

Abstract: A method of optically mapping a person's face includes the steps of illuminating the face through a grid structure to produce a grid representation on the face; viewing the illuminated face with a video camera; producing a video signal in response to the step of viewing; converting the video signal to digital form; storing a frame of the digitized video signal in a frame memory; defining the grid representation on the face, from the stored video signal; locating coordinates of the intersection points of the grid representation; determining curvatures of the grid representation at the located intersection points; and three-dimensionally reconstructing the surface of the face from the coordinates and curvatures of the intersection points.

Abstract: An automatic high speed Holter scanning system operates in a nonautomatic mode or in an automatic mode to receive electrocardiogram signals which have been prerecorded in dissimilar formats having different known parameters, and to process same in accordance with an operator input. The automatic arrhythmia processor of the present invention detects ectopic cardiac information, stores the detected information in time sequence, and selectively reads out and displays the stored ectopic information in response to operator command. In addition, the automatic arrhythmia processor compares QRS complexes in received ECG signals to a desired normal QRS complex, and continuously updates the R-R interval and area of the normal QRS complex following each comparison of the normal QRS complex with the subsequent QRS complexes.