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There exists a need to quantify the radiological information contained in the digital measurements of the imaging technologies. These imaging technologies include computed tomography, nuclear medicine examinations, diagnostic ultrasound imaging, computer radiography and digitization of radiographic film images. A rapidly growing number of studies suggest that useful quantitation of radiographic information includes linear measurements for organ estimation, estimation of surface areas and volumes, estimation of tissue density, and the visualization of three-dimensional organ sites.
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Dwyer et al. (1980) studied this question.
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