Image Optimization 5-35 
  Delete an ROI 
Press the <Clear> key to clear the last ROI. Tap [Delete All] on the touch screen to 
clear all ROIs. 
The corresponding traces for the deleted ROIs are erased from the plot. 
Press <Clear> to delete the last added ellipse ROI. 
  Standard Height/Standard Width/Standard Angle 
Use the touch screen selections [Std. Height], [Std. Width], [Std. Angle] to adjust the 
height, width and tilt angle of the standard ROI for the current or following ROIs. 
ROI tracking 
Tap [ROI Tracking] to be On to start tracking. 
This function provides a motion-compensated ROI as precise time-intensity information 
can be acquired using active tracking. 
Tip: 
z  Elliptical ROIs can be positioned in any way that keeps their center within the 
image boundaries. If part of the ROI is outside the image boundary, only data 
from within the image boundary is used for calculating the mean intensity value. 
z  When the user repositions an ROI, the old trace data is erased from the plot and 
the trace data for the new position re-plotted. 
Export Trace Data 
1.  Tap [Export] on the touch screen. 
2.  Select the drive and enter the file name in the displayed window. 
Select [OK] to save the data and return to the QA Analysis screen. 
z  All displayed ROI traces are saved in the exported file. 
z  The parameters are included in the trace file if the user has fixed a ROI. 
z  After exporting, a .BMP format image is displayed in the thumbnail area in the 
lower part of the screen. 
z  Only data from the user-selected image range is included in the exported trace 
file.