Length

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Length

 

Select  Length  from the  Measurements  drop down menu (or press the  L  key).

 

RadiAnt_DICOM_Viewer_Adjust_Measurements_DropDownMenu_Length

 

Place the cursor over the starting point, then press left mouse button and drag the mouse to draw a segment with length measurement. Release the button to finish drawing.

 

RadiAnt_DICOM_Viewer_Adjust_Measurements_Length

 

The distance value will be shown in either millimeters or pixels (when the calibration data is not included in the image file).

 

You can move the entire segment or one of its endings by dragging while pressing the left mouse button.

The label may be also dragged to a more convenient place if necessary.

 

Press  Shift  while drawing the segment to make it either vertical or horizontal.

 

RadiAnt_DICOM_Viewer_Adjust_Measurements_Length_Horizontal_Vertical

 

 

 

Calibration of measurements

 

Depending on the source of the calibration data, the label with a measurement will be displayed in different colors:

 

Measured distance is calibrated (the pixel spacing element is present).

Measured distance is calibrated (the pixel spacing element is present).

The distance is calculated using the estimated radiographic magnification factor.

The distance is calculated using the estimated radiographic magnification factor.

The distance is measured at the detector plane.

The distance is measured at the detector plane.

Ultrasound region calibration is used.

Ultrasound region calibration is used.

Manual calibration was performed by a user.

Manual calibration was performed by a user.

There is no calibration data available (measurement in pixels of the source DICOM image).

There is no calibration data available (measurement in pixels of the source DICOM image).

 

Manual calibration

 

The image can be manually calibrated (if no calibration data was present in the DICOM file) or recalibrated.

 

1) Measure the object with a known size, and then right-click the segment or its label to show a pop-up menu.

 

RadiAnt_DICOM_Viewer_Manual_Calibration_Menu

 

2) Click  Calibration  to open the dialog window. Enter the distance and select the units (millimeters, inches or French sizes), click  OK  to recalibrate the image.

 

RadiAnt_DICOM_Viewer_Manual_Calibration_Window

 

3) Now the measurements will be taken with the manual calibration data and shown in millimeters.

 

RadiAnt_DICOM_Viewer_Manual_Calibration_Sample

 

 

To revert the manual calibration show the "Calibration" window and click the  Reset calibration  button.

 

RadiAnt_DICOM_Viewer_Manual_Calibration_Reset

 

 

 

Measurements in US (ultrasound) images

 

DICOM images coming from the ultrasound devices often include calibrated regions. Depending on the region type, different parameters can be measured.

 

Below is the sample screenshot showing the measurement of distance, velocity and time.

 

RadiAnt_DICOM_Viewer_Ultrasound_Regions_Measurements