A simultaneous scan of transmission CT and emission CT using a large field gamma camera was tried to make a fusion image. On a phantom study using133Xe or 201Tl for emission CT source and99mTc for transmission CT source, the fusion image was created without truncation artifact. On a clinical study of brain tumor, the fusion image was successfully obtained.
In general, the sewerage at radioisotope laboratories has very strong stench. We treated the sewerage with a total water treatment agent (Tachileslegi, Nippon Nouyaku Co., Ltd.) that is widely used for prevention of slime, scale, corrosion in cooling towers. As the result, the stench was decreased to about two thirds to that of control estimated by odor-test.