A three-dimensional dynamic cardiac phantom suitable for quality control of equilibrium gated nuclear cardiographic procedures is described. Its flexible microprocessor based design provides an absolute standard for ejection fraction determination, ventricular volume quantitation, and physiologically gated single photon emission computed tomography. The cost of the phantom is comparable to that of commercially available phantoms suitable for ejection fraction quality control alone.
A design is presented for a cathode cap for the AEI-EM6 microscope suitable for use with pointed filaments. Experimental results indicate that an increase in brightness by a factor of ten and coherence by a factor of two may be obtained with the cap over that using the standard apparatus.
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