6 Working With Measurements

6 Working With Measurements
6
Working With Measurements
Measurements accompanying ultrasound images supplement other clinical procedures
available to the attending physician. Accuracy of the measurements is determined by the
Terason Ultrasound software and by proper use of medical protocols.
When you freeze a scan, the Terason software changes the set of available button controls.
For example, if you scanned in 2D mode, when you freeze the image, the buttons include
Trace, Ellipse, and Caliper.
When you save an image, all measurements are saved with the image.
You can create measurements on the currently acquired image (with frames stored
temporarily).
To make measurements on scanned images, you must understand:
•
•
•
•
•
•
•
Measurement Results Display Location on page 102
Measurement Sets; see page 103
Measuring in the 2D Window; see page 106
Measuring in the M-Mode Window; see page 110
Measuring in Spectral Doppler Modes; see page 112
Deleting Measurements; see page 112
Restoring All Measurement Groups to Defaults; see page 113
You can also make measurements on both screens when using Split Screen mode. See
Split-Screen Measurements on page 110.
To obtain a complete set of measurements, you often have to acquire multiple scans. You
can make as many scans and measurements as required for the study without losing any
measurements. Measurements remain on the Imaging window until you:
•
•
•
•
•
Select a different exam
Select a different scan mode
Load a different patient
Tap the Delete button
Tap the Clear All button
Measurement Results Display Location
The default location for the display of measurement results is the top left of the image. To
move the results to the bottom of the image, tap the Results button. You can also change the
default location to the bottom of the image using the Result Display Location radio buttons on
the Setup/Measurements window.
Terason uSmart3200T Ultrasound System User Guide Volume 1
102
Working With Measurements
Measurement Sets
Measurement Sets
When you choose an exam preset, the Terason software makes a default set of
measurements available. The default set may vary from one supported probe to another.
You can also add custom measurements to the available lists. See:
• Default Measurement Sets on page 103
• Customizing Measurement Sets on page 103
• Setting Measurement Defaults on page 138
Default Measurement Sets
The system loads a set of measurements tailored for the preset you’ve selected. The
measurements are selected using the Calc button.
To select a measurement type, tap the Calc button, and tap the desired measurement.
Customizing Measurement Sets
If the default measurement set does not include a measurement you need, you can
customize the set.
To add an available measurement to the Current Measurement List, complete these
steps:
1. Tap the uSmart3200T name at the top left of the screen.
2. Tap the Setup button.
The Setup window opens.
3. Tap the Measurements tab.
The Setup/Measurements window opens.
Setup/Measurements Window
Terason uSmart3200T Ultrasound System User Guide Volume 1
103
Working With Measurements
Measurement Sets
4. Tap Configure Measurements.
The Configure Measurements window opens.
Configure Measurements Window
5. To configure the Spectral Doppler measurement sets, tap Spectral. Otherwise, proceed
to the next step.
6. In the Available Measurements area, select the desired measurements.
• To select a sequence of measurements, drag out the keyboard hidden at the left side
of the screen and tap the Shift key, then tap the first and last measurements.
• To select multiple measurements that are not in sequence, drag out the keyboard
hidden at the left side of the screen and tap the Ctrl key, then tap the desired
measurements.
7. Tap the right-pointing arrow button.
The selected measurements are added to the Current Measurement List.
8. Tap OK.
9. On the Setup/Measurements window, tap OK (or Apply, if you need to add custom
measurements).
Terason uSmart3200T Ultrasound System User Guide Volume 1
104
Working With Measurements
Measurement Sets
To add a custom measurement to the Current Measurement List, complete these
steps:
1. Tap the uSmart3200T name at the top left of the screen.
2. Tap the Setup button.
The Setup window opens.
3. Tap the Measurements tab.
The Setup/Measurements window opens. (See Setup/Measurements Window on
page 103.)
4. Tap Configure Measurements.
The Configure Measurements window opens. (See Configure Measurements Window
on page 104.)
5. Tap Add.
The Custom Measurement window opens.
Custom Measurement Window
6. In the Measurement: menu, select a measurement type.
7. In the Name: field, enter a name for the custom measurement.
8. Select the tool used for the custom measurement by tapping the appropriate radio
button.
9. Tap OK.
10. In the User Measurements area of the Configure Measurements window, tap the new
measurement to select it.
11. Tap the right-pointing arrow button.
12. Tap OK.
13. On the Setup/Measurements window, tap OK.
Terason uSmart3200T Ultrasound System User Guide Volume 1
105
Working With Measurements
Measuring in the 2D Window
Measuring in the 2D Window
When you freeze a 2D scan, the Terason software displays buttons for measuring, printing,
and playing loops in 2D mode.
2D Mode Measure Buttons (When Scan is Frozen)
The Measure function in the 2D window allows:
•
•
•
•
Measuring Distances; see page 106
Measuring Elliptical Circumference and Area; see page 107
Tracing Areas on the Image; see page 109
Split-Screen Measurements; see page 110
In general, select what you want to measure from the menu of measurements. If you select
a specific measurement, such as Area, only the buttons that work with that measurement
are available.
Measuring Distances
To measure a distance in the 2D window, complete the following steps:
1. If the image is live, tap the Freeze button.
The image freezes and the button controls change.
2. To measure a detailed area with precision, use the Zoom function (see Enlarging an
Area of the Image on page 55) to enlarge an area of the 2D scan.
3. Tap the Caliper button.
4. Tap where you want to start measuring, move the target cursor, and tap where you
want to finish measuring.
The Terason software displays the results in the top left corner of the 2D window.
Terason uSmart3200T Ultrasound System User Guide Volume 1
106
Working With Measurements
Measuring in the 2D Window
Distance Measurement on an Image
If you do not see the measurement value, select Setup > General > Measurement Value.
To make more than one measurement of the same type on an image, tap the appropriate
button again, then make the additional measurement.
When making a series of 2D measurements using the Caliper button, you can keep the
caliper active by checking the Keep caliper active box on the Setup/Measurements window
(see Setup/Measurements Window on page 103). When the box is checked, a new caliper
cursor appears when you set the end point of a caliper measurement. When you finish
making measurements, save the image, then tap the Freeze button to turn off caliper
measuring.
Measuring Elliptical Circumference and Area
You can use either the Ellipse button or the Trace button to measure a circumference on the
image. To measure an oval area, use the Ellipse button. To measure the area of an irregular
shape, use the Trace button. See Tracing Areas on the Image on page 109 for instructions
on using the trace tool.
To measure a small area, use the Zoom function before you measure.
To use the ellipse tool to measure an elliptical area, complete the following steps:
1. If the image is live, tap the Freeze button.
The image freezes and the button controls change.
2. Tap the Calc button.
The Measurements menu opens.
Terason uSmart3200T Ultrasound System User Guide Volume 1
107
Working With Measurements
Measuring in the 2D Window
Measurements Menu
3. Select the measurement type by tapping it in the Measurements menu.
If you select Circumference from the Measurement menu, the Ellipse tool is
automatically activated.
4. Position the target cursor at one end of the area that you want to measure and tap.
5. Move the target cursor to the other end of the desired area, and tap.
The Terason software displays a green line and shows the circumference or area
values at the top of the image.
Ellipse Measurement on an Image
If the measurement value does not show on your computer, select Setup > General >
Measurement Value.
6. When the measurement is correct, tap the measurement to lock it in place.
You cannot change a measurement after locking it in. You can now make another
measurement without deleting the measurements you’ve locked in.
7. To save the measurements, tap the Store button.
The image is saved with all measurements.
Terason uSmart3200T Ultrasound System User Guide Volume 1
108
Working With Measurements
Measuring in the 2D Window
Tracing Areas on the Image
The Terason software lets you measure an area by tracing the contour of any shape on an
image. You can also use the Ellipse tool to measure an area (see Measuring Elliptical
Circumference and Area on page 107 for instructions.)
You can use the trace tool to:
• Trace an irregular shape by sketching the outline
• Draw a polygon by tapping on corners of the shape
You can also combine these methods to trace an area on the image.
To trace an area on an image, complete the following steps:
1. If the image is live, tap the Freeze button.
The image freezes and the button controls change.
2. Use one of the following methods to select the trace tool:
• Tap the Trace button.
• Select Area from the Measurement menu.
3. To trace an outline:
a. Tap where you want to start measuring.
b. Drag the tracing cursor around the object you want to trace.
Tracing an Outline
c. When your trace is nearly complete, lift the stylus, and the software completes the
loop by drawing a straight line from the current cursor position to the starting point.
Trace Measurement on an Image
When you lift the stylus, the trace turns white, and can no longer be edited. Before you
lift the stylus, you can reverse the track of the cursor to delete parts of the trace.
Terason uSmart3200T Ultrasound System User Guide Volume 1
109
Working With Measurements
Measuring in the M-Mode Window
Split-Screen Measurements
When measuring in Split Screen mode (see Working With Split Screen Mode on page 57),
all measurements are displayed in a single list, even if both screens contain measurements.
You can make a measurement on either screen or across both screens.
To make alternating measurements on split screens, you must Disable Return to live
imaging:
1. Tap the uSmart3200T name at the top left of the screen.
2. Tap Setup.
3. Tap the Display tab.
4. Tap Return to live imaging on toggle active screen, so that the box is not checked.
5. Tap OK.
This allows you to make a measurement on one screen, switch to the other screen and
make a measurement there, then return to the first screen and make additional
measurements. If the box in the Setup/Display window is checked, returning to the first
screen makes it live and erases all measurements on it.
To make a measurement across both screens:
1. Disable Return to live imaging, as described above.
2. Freeze a scan on one screen.
3. Tap the Toggle Screen button.
4. Freeze a scan on the other screen.
5. Tap the measuring tool button for the tool you need.
6. Tap the start point of the measurement.
7. Tap the end point of the measurement.
8. Lift the stylus.
Measuring in the M-Mode Window
When you freeze an M-mode scan, the Terason software displays buttons for measuring,
printing, and playing loops in M-mode.
Terason uSmart3200T Ultrasound System User Guide Volume 1
110
Working With Measurements
Measuring in the M-Mode Window
M-Mode Measure Buttons (When Scan is Frozen)
Making M-Mode Measurements
In the Time Series window of an M-Mode scan, you can measure:
• Heart rate (HR)
• Distance (includes time over distance [TD] and Slope values)
To measure in the M-Mode Time Series window, complete the following steps:
1. Tap the Freeze button.
2. Use the buttons to select a measurement type.
3. Tap the target cursor where you want to start measuring.
4. Move the target cursor and tap at the desired end location. The measurement displays
at the top left of the Time Series window.
M-Mode Measurement
5. Print and save the image, if required.
Terason uSmart3200T Ultrasound System User Guide Volume 1
111
Working With Measurements
Measuring in Spectral Doppler Modes
Measuring in Spectral Doppler Modes
When you freeze a Pulsed-Wave Doppler or Triplex scan, the Terason software changes
the buttons to allow measurement, printing, and other functions.
PWD Measurement Buttons
The Measurement section of the panel controls the following measurement operations:
•
•
•
•
Velocity
Time
Slope
Calc
You can use the CA (correction angle) button and the 0/+-60 button to adjust the angle on
the frozen scan. This function works the same as the Correction Angle on the PWD tab as
described in Adjusting the Correction Angle on page 78.
If you have added 2D measurements to the Spectral measurement set (see Customizing
Measurement Sets on page 103), you can perform 2D measurements in Spectral Doppler
imaging screens.
To make 2D measurements on Spectral Doppler imaging screens, tap the Calc button.
Any 2D measurements you have added to the Spectral measurement set appear in a
Measurements menu at the top right corner of the imaging screen. See Measuring in the
2D Window on page 106 for instructions in making 2D measurements.
Deleting Measurements
You can delete the most-recent measurement, or you can delete all measurements on the
current image.
To delete the most recent measurement, tap the Delete button.
To delete all measurements, tap the Clear All button.
Terason uSmart3200T Ultrasound System User Guide Volume 1
112
Working With Measurements
Restoring All Measurement Groups to Defaults
Restoring All Measurement Groups to Defaults
To restore all measurement groups to the defaults:
1. Tap the uSmart3200T name at the top left of the screen.
2. Tap Setup.
3. Tap the Measurements tab.
4. Tap the Configure Measurements... button.
5. Tap the Restore button.
6. Tap OK.
Terason uSmart3200T Ultrasound System User Guide Volume 1
113
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertising