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Perforated Tape Recorder for Digital Scan Data Store With Grey Shade and Numeric Readout¹

Philadelphia, Penna

ABSTRACT

The design and operation of a scan data system is described. Digitized counting and position data are recorded on a strip of perforated paper tape without significant loss or distortion. Rapid playback converts these data to a recognizable form. For visual inspection, a grey shade picture is generated on Polaroid film, with contrast under operator control. For quantitative retrieval, the counting data are presented as a matrix of typewritten numbers. The inexpensive length of perforated paper tape remains part of the patient's permanent record, available for future analysis if needed. Instrument cost is commensurate with present day rectilinear scanners. The data system has proved to be efficient and reliable in the processing of several thousand scans over the past two years.

FOOTNOTES

¹ This project was supported by USAEC Contract No. AT (30-1)-3175, USPHS Research Grant No. C-4456, and USPHS Research Career Program Award CA-14,020 from the National Cancer Institute. NYO-3175-19.

² Department of Radiology of the School of Medicine and the Hospital of the University of Pennsylvania and the William H. Donner Center for Radiology, Philadelphia, Pennsylvania.