Image Optimization 5-23
Operation
Tap [Arrow Lifetime] to adjust the parameter.
The adjusting range is 10-50 in increments of 1.
Impacts
The arrow appears longer with the value becoming larger.
The arrow appears shorter with the value becoming smaller.
Arrow Size
Description
Used for adjusting the arrow size.
Operation
Tap [Arrow Size] to adjust the parameter.
There are S, M, L, XL, XXL values of the spectrum.
Impacts
The end point of the arrow does not change with the value becoming larger, but the
arrow length becomes longer.
The end point of the arrow does not change with the value becoming smaller, but the
arrow length becomes shorter.
Trig Type
Description
Set trigger type.
Operation
Under V Flow mode, turn on ECG and select “Manual” or “R” or “R100/200/300/400”
trigger mode. Image will be captured in 100/200/300/400ms after R wave and ECG wave
will be marked by red at that time.
Impacts
Tap [Trig Type] to select the levels: manual, R, R100, R200, R300 and R400.
ROI Size
Description
Adjust the size of ROI.
Operation
Click [ROI Size] on the touch screen to adjust.
5.6.4
Vector Flow Quantitative Analysis
Single point-time curve
1. Capture the image. Follow 1-5 procedure in 5.6.1.
2. Tap [Speed A/B/C] on the touch screen. The single point-time curve appears at the bottom of the
screen. (The speed of either point changes with the time. Besides, X-axis represents the time;
Y-axis represents the speed. Single point-time curve appears in white.)
The speed vector graphics appears below the parameter area. Here, Vel and Angle refer to the
absolute velocity and angle of the blood flow at this position. The white arrow indicates the speed
direction of the cursor.
Move the cursor to any position of the blood vessel; the single speed-time curve and the vector
graphics are updated in real time (click [Speed A/B/C], adjust [Speed A/B/C] again by rotating the
track ball and pressing <set> key, or press <Clear> key to clear Speed A/B/C).
