- 00000018WIA30F8E870GYZ
- id_400248991.3
- Feb 21, 2022 4:47:55 PM
Contrast Amount and Type
Enter the amount and contrast type in the designated fields.
Important: Selecting Contrast changes how Auto Prescan is performed. With Contrast on, the Auto Prescan values (R1 and R2 gains) are optimized for a contrast enhanced scan. If you are performing an exam that acquires a mask and contrast enhanced scans that will later be subtracted, you must set the optimal prescan values in the mask series. When acquiring the contrast enhanced series, from the Workflow Manager area, click so that you do not change the prescan values between the mask and contrast enhanced scans. For any subtraction process, you want to have the Auto Prescan values identical for the un-enhanced and enhanced scans. It is very important for the subtraction process that the Prescan values are the same between the mask and enhanced acquisitions. The mask series will be annotated with a C+.
Note: The important notice detailed above is not necessary with Multi-Phase acquisitions where the mask and contrast enhanced images are acquired within a single setting. In these situations, there is only one prescan performed.
When a contrast series follows a non-contrast series, Auto Scan will not start. Instead the contrast injection message appears and you must click OK to proceed. The message does not appear again.