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Abstract

A method for the correction of uniformity of a gamma camera comprising a detector giving, for each pixel i,j having coordinates x.sub.i, y.sub.i, a number n.sub.ij representing the number of scintillations recorded in said pixel. The method comprises an initial step consisting in: placing a point source at a finite distance from said detector; acquiring the number n.sub.ij at each pixel i,j, computing the parameters x.sub.o, y.sub.o, z.sub.o that minimize the function: ##EQU1## N.sub.ij being defined by the expression ##EQU2## in which: x.sub.o, y.sub.o are the coordinates of the point source in the plane of the detector, z.sub.o is the distance from the point source to the plane of the detector, N.sub.o is the signal at the pixel having coordinates x.sub.o, y.sub.o, multiplying the number n.sub.ij of each pixel by a coefficient proportional to: ##EQU3## Application to medical imaging using gamma camera type display devices.

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