Recently as the useful technique of cardiac diagnosis, the radioisotope angiocardiogram becomes more and more in use. The main reasons are the following two: (1) the safe treatment for patients, (2) the advent of the short half-value period pertechnates such as 99m
TC. The newly des14 ed system of displaying the scintigram images exceeds the ordinary computer controlled display system not only in the image resolution but also in the shortening of the diagno stic decision.
This system was achieved by inducement of the Television technique to the ordinary scintillation camera. As using this image display system combined with the dilution curve recorder, it takes about 15 minutes to give the diagnostic decision for one case, and its image resolution is equivalent to about 500 x 500 matrix.
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