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November 24, 1951

APPLICATION OF THE LAND METHOD OF FILM PROCESSING IN ROENTGENOLOGY: PRELIMINARY REPORT

JAMA. 1951;147(13):1217-1219. doi:10.1001/jama.1951.03670300031006
Abstract

A new one-step, essentially dry photographic process was publicly described in 1947.1 The process had certain desirable features that made it applicable to roentgenography. This paper describes a joint program of investigation into certain roentgenologic applications of this process which utilized the technical facilities of the Polaroid Corporation and the medical facilities of Massachusetts General Hospital.

Because the program has amply demonstrated the immediate applicability of the method in particular instances, a preliminary description and discussion is necessary.

PROCESS  The Land process used in radiology is similar in its essentials to that used in amateur photography.2 Several modifications have been made, however, in the physical form of the materials and equipment.The process utilizes two sheet materials, a negative sheet bearing a light-sensitive emulsion and a positive sheet on which the permanent positive radiograph is produced. The positive sheet bears a special coating which is not sensitive to

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