<title>Storing Medical Images On High Density Digital Tape Recorders</title>

Abstract

Instrumentation magnetic tape recording systems have begun to appear which use digital recording techniques in place of frequency modulated (F.M.) analog methods. This is a direct result of the instrumentation users need for storing data with greater fidelity and with better interfacing capabilities to digital computer based signal analyzers. These new recorders, based on conventional longitudinal recording geometries, are currently in production and can be used for storing digital medical images. Using standard instrumentation magnetic tape, high density digital recorders can store 35,000 images (512X512X8) at 60 images/sec rate. Rotary helical scan recorders based on industrial 1/2 inch video or 1 inch broadcast video machines have been demonstrated with capacities of up to 300,000 images at 120 images/ sec rates. It is apparent that existing high density digital magnetic tape recorders can store large numbers of images generated in digital radiography at reasonable cost, and using proven reusable recording media, several recording systems are described which can make use of this capability.