Abstract
An apparatus was described that consists of a stationary array of eight NaI scintillation crystals positioned to view the entire lung field. Nuclear pulse data are recorded event by event on multichannel standard 1/4 inch magnetic tape. Spirometer volume and the activity of the expirate are also monitored and recorded on the magnetic tape. The data are retrieved by means of a compatible tape deck mounted in an interface to a PDP-9 digital computer, and by the use of programs which translate the data into machine language for processing, storing and automatic plotting. The apparatus is designed primarily for use with positron emitting cyclotron produced radioisotopes, but may also be used with commercially available 133Xe. Examples of clinical results were shown using 133Xe, 13N-labelled N2 and 15O-labelled CO2.
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