Abstract: Methods are disclosed comprising transmitting ultrasound waves to a plurality of regions of a brain of a subject via one or more probes, receiving ultrasound echoes corresponding to the transmitted ultrasound waves, determining a parameter based on the ultrasound echoes for each region of the plurality of regions, determining a time course for each parameter, and one or more of: comparing the time courses for each region of the plurality of regions to determine a pulsatility measurement for each region of the plurality of regions and comparing the time courses to one or more of, a known time course in normal brain tissue and a known time course in abnormal brain tissue to classify each region of the plurality of regions as comprising normal brain tissue or abnormal brain tissue.

Abstract: Embodiments of an x-ray converter are disclosed in which a conventional PSP and computed digital radiology equipment may be used with the converter to convert an analog x-ray image into a digital image.

Abstract: Laser guides for an X-ray device are disclosed in which a pair of laser projecting means are rotatably affixed to any X-ray device, either portable or stationary, such that the beams from the projecting means project toward the X-ray receptor and inward toward a line between the receptor and the X-ray device, and the laser beams cross at a particular location such that when the X-ray device is moved closer to or further from the X-ray receptor the laser beams cross when the X-ray device is at the optimum distance from the X-ray image receptor and the X-ray beam is centered upon the X-ray image receptor.

Abstract: Laser guides for an X-ray device are disclosed in which a pair of laser projecting means are rotatably affixed to any X-ray device, either portable or stationary, such that the beams from the projecting means project toward the X-ray receptor and inward toward a line between the receptor and the X-ray device, and the laser beams cross at a particular location such that when the X-ray device is moved closer to or further from the X-ray receptor the laser beams cross when the X-ray device is at the optimum distance from the X-ray image receptor and the X-ray beam is centered upon the X-ray image receptor.

Abstract: Embodiments of an X-ray cassette holder to be used in conjunction with a conventional X-ray machine are disclosed which may be used to removably hold any of a variety of conventional X-ray cassettes. The cassette holder includes means for adjusting the height of the X-ray cassette above the floor or table and a handle such that the X-ray cassette may be held in an appropriate X-ray position by an operator at a distance from the X-ray machine.