Calibrating measurements in Panoramic images is not suggested. Panoramic images are 2D distortions of a 3D image, which makes distances inconsistent throughout the x-ray. Apteryx recommends measurements be taken using intra-oral sensors for accuracy.
Calibrating measurements for Phosphor Plate images will only be successful for a single image and will not apply to all scanned images. This is because the calibration is based on resolution (eg 1070 x 790). Scanned images may have a slight rotation when dropped into the scanner resulting in an inconsistent resolution (eg 1071 x 789 or 1069 x 791).
Calibrating a sensor is done by taking an image of an object of known size and using that image as reference for Apteryx software to measure against. Apteryx recommends using a coin as the reference image, and supplied below is a sizing chart for US and Canadian coins.
- Open XVWeb under a Test Patient.
- Capture an x-ray on the chosen test patient in XVCapture of an object of known size with each sensor.
Each calibration record is specific to
- The model
- The manufacturer
- The serial Number
- The image height/width (i.e. calibrating a 1200 x 800 image will also calibrate any 800 x 1200 images)
- Example: If you have 2 Tuxedo A Size 2 sensors and 4 Tuxedo A Size 1 sensors, you will need to capture an image on an object of known size with all size 2 sensors, and all size 1 sensors.
- Click on the thumbnail of the image on the left-hand side.
- Select the image in the middle of the screen to bring up the Image Edit bar at the bottom of XVWeb
- At the bottom of the window, click the Label button, then select Calibrate
- Left-click on the starting point of the measurement (in the example of a coin, it would be one edge). Move your cursor in a relatively straight line and left-click on the end of the measurement area.
- The Calibrate Measurements prompt will populate with a reported distance in millimeters. Fill in the correct known distance (in millimeters).
If using a US or Canadian coin as your object of known size, a chart showing the diameters of these is below. - Click Save.
- Repeat steps 2-7 for every sensor of unique size, branding, and serial number.
Size calibrations are global settings and will apply to every workstation using the calibrated install.
US Coin Denomination |
Penny![]() |
Nickel![]() |
Dime![]() |
Quarter![]() |
Half Dollar![]() |
Dollar![]() |
Diameter | 19.05 MM | 21.21 MM | 17.91 MM | 24.26 MM | 30.61 MM | 26.49 MM |
Canadian Coin Denomination |
1 Cent![]() |
5 Cent![]() |
10 Cent![]() |
25 Cent![]() |
50 Cent![]() |
Loonie (1 Dollar) ![]() |
Toonie (2 Dollar) ![]() |
Diameter | 19 MM | 21 MM | 18.03 MM | 23.88 MM | 27.13 MM | 26.5 MM | 28 MM |