MINICOMPUTER ENHANCEMENT OF SCINTILLATION CAMERA IMAGES USING FAST FOURIER-TRANSFORM TECHNIQUES

  • 1 January 1976
    • journal article
    • research article
    • Vol. 17  (7) , 647-652
Abstract
Minicomputer methods were developed to enhance lesions in scintillation camera images. This study was directed towards improving the diagnostic quality of liver images. A PDP-12 digital computer was interfaced to a Pho/Gamma HP III scintillation camera and programmed to carry out 2-dimensional frequency-domain analysis and processing as an on-line operation. A 2-dimensional fast Fourier transform (FFT) is generated, and a composite 1-dimensional frequency spectrum is produced. An interactive program allows the operator to construct graphically a frequency-domain filter and apply it to the data matrix. The filter is optimized using the image of a known phantom and then applied unchanged to the clinical liver image. An inverse Fourier transform produces an enhanced image in the spatial domain. Significant enhancement of phantom and liver images was obtained.

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