Quatech Audio/Video Capture USB 2.0 Dokumentacja Pobierz pdf (Strona 226)

9-24 z.one ultra and z.one ultra sp OPERATOR MANUAL

NOTE: Acceleration is always calculated in the direction of positive time. The

velocity caliper positioned at the earliest strip time is always the startpoint (and the

other caliper is the endpoint) for calculating the delta velocity (DeltaV), delta time

(AT), and acceleration (Accel) results.

NOTE: Pressing the Set button again toggles the active caliper selection between

the first and second velocity calipers, allowing positional corrections to be made to

both caliper instances within the strip image.

8. Press the Measure button to remove the Accel tools and exit Measure mode.

Systolic/

Diastolic Ratio

The PW Systolic/Diastolic (S/D) Ratio is defined as abs (Max/Min), where Max

and Min are determined by comparing the absolute velocities obtained by two

concurrent PW Velocity calipers positioned within the same PW Doppler strip.

• Only a single instance of this tool can exist at any one time.

•The DDB displays both Velocity results and their associated S/D calculation

result and continuously updates the results when the user positions either

caliper within the PW Doppler strip image.

• In the DDB, Max velocity is identified as PSV (Peak Systolic Velocity) and Min

velocity is identified as EDV (End Diastolic Velocity).

 To Measure Systolic/Diastolic (S/D) Ratio

1. Freeze the display with a PW Doppler strip image.

2. Press the Measure button.

3. Highlight and select S/D.

4. The PSV velocity caliper will be displayed.

5. Use the Trackball to position the caliper to the desired location within the PW

Doppler strip display. At this time:

6. Press the Set button to fix the PSV velocity caliper and activate the EDV

velocity caliper.

NOTE: The S/D result is calculated and displayed once both velocity calipers have

been activated.

7. Use the Trackball to position the caliper to the desired location within the PW

Doppler strip display.

NOTE: If the absolute value of the EDV velocity result is greater than the current

PSV result, the EDV and PSV result displays are swapped and the caliper becomes

a PSV caliper. The converse is also true when the absolute value of the PSV

velocity result is less than the current EDV result.

SmartCart/SmartCart sp

Only displays the PSV velocity result (in the DDB)

and the System updates the result as the user

positions the caliper within the strip image

SmartCart/SmartCart sp

Only updates the EDV velocity result and the S/D

calculation result as the user positions the caliper

within the strip image

1 2 ... 221 222 223 224 225 226 227 228 229 230 231 ... 403 404

Komentarze do niniejszej Instrukcji

Brak uwag

Quatech Audio/Video Capture USB 2.0 Dokumentacja Strona 226

Komentarze do niniejszej Instrukcji