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Using Digital-Computer Circuitry for Multinuclide Scanning

Kanazawa University, Kanazawa, Japan

Correspondence: For reprints contact: Kin-ichi Hisada, Dept. of Radiology, School of Medicine, Kanazawa Univ., Takara-machi 13-1 Kanazawa, Japan.

ABSTRACT

We have successfully performed four-nuclide scanning with the Alderson Research Laboratory organ scanning phantom and four radionuclides—¹⁹⁸Au, ²⁰³Hg, ⁷⁵Se and ¹⁹⁷Hg—all chosen with future clinical practice in mind. Isosensitive scanning, which can provide depth-independent information, is requisite for multinuclide scanning which aims at simultaneously visualizing multiple organs at various depths. Four scan-recording heads and four spectrometers are also indispensable parts of four-nuclide scanning. The pictorial quality of multinuclide scans has been improved greatly by using the digital-computer circuitry designed and constructed by the authors. Some subtraction error due to statistical fluctuation must be minimized by some means in the future.