We have constructed low-cost equipment for the measurement of the optical density of x-ray films. This equipment is based on a video system connected via an analog to digital converter to an Apple microcomputer. The optical density of an x-ray film can thus be accessed by commands in BASIC or machine-code programs. By using a calibrated step-wedge film, we have found a stable linear response for optical densities of up to 0.8.
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| http://dx.doi.org/10.1038/jcbfm.1985.67 | DOI Listing |
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