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Case 2. The two scans were performed one year before her logoclonia appeared.
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SPECT with 99mTc-ethylcysteinate dimer with easy z-score imaging system (eZIS) showed relative hypoperfusion mainly in the left temporo-parietal junction (Fig. 2).
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Case 3. The left two scans were performed two year before his logoclonia appeared, whereas the right ones were performed when he developed logoclonia.
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SPECT with 99mTc-ethylcysteinate dimer for cases 2, 3, and 4 and with N-isopropyl-p-[123I]-iodoamphetamine dimer for case 1 showed relative hypoperfusion mainly in the left temporo-parietal junction. The Z-score scale of 1 to 7, which reflects lower regional cerebral blood flow, is indicated by the blue to red color gradient with a higher Z-score scale representing a lower reginal cerebral blood flow for case 1. For case 2 to 4, the Z-score scale of 2 to 5 is indicated by the black to red color gradient. Case 1. The left two scans were performed four year before her logoclonia appeared, whereas the right ones were performed when she developed logoclonia.
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Case 3. The left two scans were performed two year before his logoclonia appeared, whereas the right ones were performed when he developed logoclonia.
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Case 4. The two scans were performed one year before her logoclonia appeared.
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SPECT with 99mTc-ethylcysteinate dimer with eZIS analysis at the age of 64 showed relative hypoperfusion in the bilateral temporo-parietal areas (Fig. 4).