Kaixin DCU12, Руководство пользователя, Страница: 65 / 87

Full Digital Color Doppler Ultrasonic Diagnostic Instrument (Vet) User’s Manual V1.00
- 57 -
minimum velocity in a cycle, measure the velocities of two points and calculate Vmean, SD ratio, PI and RI.
Measure method:
1. Move the cursor to
〖
PI
〗
menu item in
【
PW Meas
】
menu, press
『
Set
』
key to enter measurement status;
2. Operate the trackball or the direction keys to move the cursor to the point at the maximum velocity,
press
『
Set
』
key to fix the point;
3. Operate the trackball or the direction keys to move the cursor to the point at the minimum velocity,
press
『
Set
』
key, envelope is automaticaly shwon on the spectral image, Vmean, SD ratio, PI and RI
are shown on right side of the display area. This measurement ends;
4. Repeat steps 2 and 3 to start a new PI and RI measurement.
16.1.4 Resistance Index measurement
Function: On the blood flow waveform of PW spectrum image, select the maximum velocity and
minimum velocity in a cycle, measure the velocities of two peak points and calculate Vmean, SD ratio, PI
and RI.
Manual measurement
Measure method:
1. Move the cursor to
〖
Manual
〗
submenu of
〖
RI
〗
in
【
PW Meas
】
menu, press
『
Set
』
key to enter
measurement status;
2. Operate the trackball or the direction keys to move the cursor to the point at the maximum velocity to
be measured, press
『
Set
』
key to fix the point;
3. Operate the trackball or the direction keys to move the cursor to the point at the minimum velocity,
press
『
Set
』
key to show the measured value SD ratio and RI on right side of the display area. This
measurement ends;
4. Repeat steps 2 and 3 to start a new RI measurement.
Auto measurement
Measure method:
1. Move the cursor to
〖
Auto
〗
submenu of
〖
RI
〗
in
【
PW Meas
】
menu, press
『
Set
』
key to enter measurement
status;
2. Operate the trackball or the direction keys to move the cursor to the point at the maximum velocity to
be measured, press
『
Set
』
key to fix the point;
3. Operate the trackball or the direction keys to move the cursor to the point at the minimum velocity,
press
『
Set
』
key, envelope is automaticaly shwon on the spectral image, Vmean, SD ratio, PI and RI
are shown on right side of the display area. This measurement ends;
4. Repeat steps 2 and 3 to start a new PI and RI measurement.
16.1.5 Maximum pressure gradient measurement
Function: measures the pressure gradient on the maximum velocity.
Measure method:
1. Move the cursor to
〖
Pmax
〗
menu item in
【
PW Meas
】
menu, press
『
Set
』
key to enter measurement
status;
2. Operate the trackball or the direction keys to move the cursor to the peak point of higher velocity,
press
『
Set
』
key to fix the point;
3. Operate the trackball or the direction keys to move the “+” mark to peak point of another higher
velocity, at the same time a trace appears in the direction of operation between two measurement
marks, press
『
Set
』
key, the right display area shows the pressure gradient on the maximum velocity;
4. Repeat steps 2 and 3 to start a new measurement.
16.1.6 Mean pressure gradient measurement
Function: On the blood flow waveform of PW spectrum image, select the maximum velocity and
minimum velocity in a cycle, measures the pressure gradient on the mean velocity.
Measure method:
1. Move the cursor to
〖
Pmean
〗
menu item in
【
PW Meas
】
menu, press
『
Set
』
key to enter measurement
status;