Thermography

The Thermography software module is designed for obtaining images from a thermal imager and analyzing thermograms in combination with ECG recordings.

PC requirements for working with the module:

• Processor – 4-core, frequency – 2500 MHz
• Operating system – Windows 10
• Not less than 4 GB of RAM (not less than 2 GB free RAM)
• Screen resolution not less than 1366x768 pixels
• Video adapter not less than NVIDIA GTX 1030 / ATI RX 560
• One free USB 2.0 port

Shooting room requirements:

• Comfortable room temperature – +23-27°C
• Steady background temperature – no heating devices, mirrors, or metal surfaces in the background
• Distance from the workplace to the subject is from 50 cm to 4 m (for full-length filming)

Delivery set:

• Thermal imager InfiRay t2s+ – 1 pc.

  *Thermal imaging cameras from InfiRay (t3s model) and i3system are also supported.

• USB-Af cable – USB-Am – 1 pc.
• USB adaptor Type-Cf-USB-Am – 1 pc.
• Thermal imager bracket – 1 pc.
• Tripod – 1 pc.
• Temperature and humidity sensor – 1 pc. (1 x CR2032 battery not included)

Technical characteristics of the thermal imager:

• Detector type: Mini-Bolometer (uncooled)
• Array format, Pixel pitch: 256×192, 12㎛
• Sensitivity (NETD): < 40mk @F/1.0, 300K
• Wavelength band: 8 ~ 14 µm
• Power supply: USB power
• Power consumption: < 350 mW
• Interface: USB-C
• Frame rate: 25 Hz
• Dimensions (W x H x D): 26 mm x 26 mm x 24.2 mm
• Weight: 18 g
• Operating temperature: -10°C ~ 65°C
• Scene range temperature: -20°C ~ 120°C
• FOV[º]: 44,9º (H) x 33,4º (V) - 56.2º (diagonal)

To get started with the module, open the assessment, and go to the tab Results – Thermography.

The module contains a menu for taking snapshots, a gallery of thermograms, a panel for reviewing and analyzing thermograms, a panel for calibrating the temperature regimen, a section for analysis and notes, settings and report window.

To take a snapshot:

1. Unpack the set.
2. Attach the bracket to the tripod.
3. Install tripod on the surface.
4. Install thermal imager in the bracket.
5. Connect the thermal imager to your PC using USB Type-Cf – USB-Am adapter and USB-Af – USB-Am wire (wires USB Type-Cf – USB-Am) from the set.
6. Place the temperature and humidity sensor on the wall behind a subject, within sight of the thermal imager, and wait for the values to be checked.

7. Click on the Switch on the camera button in the Thermography module.

8. When you use the camera for the first time, the driver installation program will be launched. Install the driver by following the instructions of the installer.
9. The module will test the thermal imager and connect to it. Please wait for a picture to appear in the module.
10. Let your thermal imager warm up for at least 15 seconds.
11. Select the desired shooting angle and adjust the focus of the thermal imager by rotating the lens ring.

12. Click on the Snapshot button in the module.

13. Repeat steps 11-12 as many times as necessary.

14. To finish the process and proceed to viewing snapshots, click on the Switch off the camera button or click on the desired image in the gallery of thermal imaging module.

15. Calibrate all captured images. To do this, enter the temperature value from the sensor in the field of the calibration panel and click on the Calibrate button. The mouse cursor will change its shape to a cross. Adjust the mouse cursor over the area of the image where the sensor is located and click on it. The mouse cursor will become standard. Calibration is complete.

16. Now you can explore images by using analysis tools and viewing the analysis section.

Important! The absolute temperature values displayed by the thermal imager are approximate and mandatory calibration is required. After calibration, the accuracy of the readings accounts for 0.18°C. For the purposes of analysis, differences in values on a human body, asymmetry, gradients, and nonstationarity are used.

Thermal imaging gallery is located on the left side of the screen. It is intended for displaying a feed of images obtained with thermal imager. There is a text field under each thermogram, that initially indicates the date and time when the shot was taken. You can change this text. You can delete thermograms by clicking on the corresponding icon.

Panel for reviewing and analyzing thermograms is in the center of the screen. It is intended for displaying and analyzing of thermograms.

There is a button in the upper-right corner of the thermogram, that allows you to copy the image to the clipboard.

On the right part of the panel, temperature scale is located. To adjust the palette, move the mouse cursor over the top or bottom sliders of the palette, click and drag the sliders up or down to adjust. Double-clicking on the scale automatically adjusts the scale: the upper slider is set to the maximum temperature value, and the lower slider is set to the background value. The scale is adjusted individually for each image.

Toolbar is in the left part of the panel for reviewing and analyzing thermograms. It is intended for selecting thermograms analysis tools. Contains marker installation tools: point, line, rectangular zone, ellipse, isotherms, temperature grid.

To select a tool, click on the corresponding button, it will be highlighted in gray:

• When selecting the Point tool by clicking the mouse on the thermogram, the point marker is set, and information on it is displayed in the analysis section (Indices) on the right (absolute temperature will be displayed). To move a point, press the left mouse button, move the mouse cursor to the desired location, and release the button.

  

• When selecting the Line tool, move the mouse cursor to the desired initial point, press the left mouse button, and drag the cursor to the end point. Release the button. Points connected by a line are fixed on the thermogram, and the information is displayed in the analysis section (Indices) on the right: T max., T min., Tips dT, dT max-min, average T, mode T, length.

  

• When selecting the Rectangular zone tool, point the mouse cursor to the desired initial point, press the left mouse button, and drag the cursor to the end point. Release the button. On the thermogram, the points of the upper-left and lower-right corners of the rectangle are fixed, the rectangle is drawn, and its information is displayed in the analysis section (Indices) on the right: Temp max., Temp min., dT max-min, average Temp, moda Temp, square.

  

• When selecting the Ellipse tool, move the mouse cursor to the desired initial point, press the left mouse button, and drag the cursor to the end point. Release the button. On the thermogram, the points of the upper-left and lower-right corners of the described rectangle are fixed, an ellipse is drawn, and its information is displayed in the analysis section (Indices) on the right: Temp max., Temp min., dT max-min, average Temp, moda Temp, square.

  

• When selecting the Isotherms tool, by clicking the mouse, either all or only related areas with a temperature close to the temperature of the selected point are highlighted on the thermogram (differing by no more than the value in degrees specified in the greater or lower side). The analysis section (Indices) displays the zone parameters: temperature, square, and perimeter.

  

• When selecting the Temperature grid tool, a grid from several horizontal (number is specified in the settings) and three vertical lines are drawn on the thermogram. All horizontal and vertical lines, as well as grid points, can be moved with the mouse cursor. First, you need to center the median vertical line along the object's midline, and then the difference temperature at the grid points are obtained by moving one of the outer lines. A table of differential temperatures is displayed in the analysis section (Indices).

  

To remove any marker, select the Marker removing tool in the panel, move the cursor over the marker to be deleted (the cursor will change), and left-click.

Abbreviations:

Тemp. max. – Maximum temperature on the line/in the zone

Тemp. min. – Minimum temperature on the line/in the zone

dT of endpoints – Temperature difference between end points of the line

dТ max-min. – Temperature difference between maximum and minimum values on the line/in the zone

Average Тemp. – Average temperature on the line/in the zone

Mode Тemp. – Mode (most common value) of temperature on the line/in the zone

Marker signatures on the thermogram:

P – marker point

L – line

R – rectangular zone

E – ellipse

Z – isothermal zon

Analysis Section is located on the right side of the screen and contains tabs: Indices, Thermal Profile, and Histogram.

The Indices subtab is intended for displaying possible mathematical parameters of selected markers.

The Thermal profile subtab is intended for displaying temperature graphs along the 'lines' selected on the thermogram, as well as 3D profiles for 'rectangular zones' and 'ellipses'.

There is a button in the upper-right corner of the thermal profile that allows you to copy the graph to clipboard.

For lines, the thermal profile is interactive, i.e. the cursor appears on the graph when hovering the mouse cursor, and the corresponding point on the thermogram is highlighted, and vice versa: when you hover the mouse cursor over a line on the thermogram, the cursor on the graph moves accordingly, helping to correlate the profile with an image.

The Histogram subtab is intended for displaying a temperature histogram based on the 'lines' and 'zones' marked on the thermogram. The histogram bars are highlighted in pseudo-colors corresponding to the image palette.

There is a button in the upper-right corner of the histogram that allows you to copy the diagram to clipboard.

In the Notes field, you can add any comment to the thermogram, which will be saved and added to the report.

In quick analysis window, cursor coordinates and temperature information of the corresponding pixel are displayed when you move the mouse cursor over an image.

Click Save report to form a report. A thermogram with all markers, descriptions of all markers from the Indices subtab, selected thermal profile and a histogram will be inserted in this report. You can edit the text and save the report to your computer.

When you click on the Options button, the module settings window opens.

You can set the following values:

• Isothermal zones select threshold (selection range – temperature of the selected point ± specified value), continguity;
• Number of rows in symmetry grid;
• Number of histogram columns;
• Color number of 3D thermal profile.

Important! An increase in the number of colors leads to a significant load on the PC, which may cause slow response in PCs with technical specifications lower than recommended.

Select a palette:

• Harmonious (with the same saturation of all colors);
• Contrast;
• Black and white (white is hot, black is cold);
• Inverse (black and white, white is cold, black is hot).

The set values are applied for a specific thermogram.

Compare images

Within the Thermography module, you can compare several thermograms (up to 6).

To do this, go to the Compare images subtab at the bottom of the screen. Next, select the images you want to compare from the thermogram gallery by checking the box in the upper left corner.

The selected thermograms will appear on the viewing panel in the central part of the screen.

On the thermograms, specify the points whose temperatures you want to compare.

The points can be moved. To do this, move the cursor over the point and, holding down the right mouse button, drag the point.

At the same time, a new Comparison subtab will appear in the analysis block, allowing you to compare thermograms at specified points in the form of linear graphs.

Graphs can be copied to the clipboard by clicking on the corresponding icon.

Morphing

Morphing allows you to overlay two images (thermograms) on top of each other. In this case, one image will gradually transform into another.

To do this, select two thermograms in the gallery by checking the box in the upper left corner.

Click on the Playback icon in the central part of the viewing panel. You will see how one image has transformed into another.

You can also morph a thermogram and an image downloaded from a computer. To do this, click on the Load image button and select an image.

You can move to any point of the image morphing by moving the trackbar cursor.

Encyclopedia

The Encyclopedia of the Thermography module is an interactive guidebook that contains information about the anatomical topography of the projection zones of internal organs. Knowing the location of these zones and comparing it with the client's thermogram data, the specialist will be able to conduct a more accurate analysis of the thermogram data, assess the foci of local temperature changes on the human body in a particular projection zone.

To do this, select the desired area/zone from the drop-down list on the left and this zone will be highlighted in a separate image, and the description text will be displayed in the text field below.

Tooltips appear when you hover over the zones in the image.

Click on the zones to see their description.

Place underneath each other function allows you to change the location of images – two in a row / one under the other.

The encyclopedia image can be copied to the clipboard by clicking the .