It's my first day back in CT after the long holiday. As usual, i usually take a bit of time to accustom to the workflow again and would be especially slow. Just my luck.... screwed a few scans and most of them are arterial liver scans. I dunno why my arterial scans just turned out to be something like PV scans. It seems like i captured the wrong phrase. There was one case which i waited and waited but the contrast just did not enhance brightly and the trigger just remain at around 158... did not go up to 200. Sigh,,,,, so sad lor.... did an optimum scan. So angry... then there was another case.. it hit the tigger.. when the arterial scan begun, there was no contrast. Damn it.. the cardiac output was irregular. I already observed that when i started the monitoring. The trigger graph just fluctuated like stock market. In the end ,,, the arterial and pv scan also turned out rather funny. Nothing i could do,,, it's my luck.