Best practices for using the application
rPPG - By Face
Note:
Wait 3 minutes between measurements to avoid device overheating.
In order to get accurate vital-sign readings, follow the instructions below:
- Device:
- The mobile device should be in a fixed position during the entire measurement.
- The device should be placed 30-40cm from the subject.
- The device battery level should be at least 20%.
- The device should be at forehead height or higher and positioned perpendicular to the subject’s face.
- Do not use the application when the device is in power save mode.
- Subject:
- Each measurement set is for a single person.
- The subject must be sitting or standing still during the measurement.
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The subject should have a fully exposed face and look at the screen throughout the whole measurement.
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The subject must stay still as much as possible and avoid any movement (including talking)
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Look at the screen during the whole measurement
- Environmental conditions:
- No light source behind the subject's face.
- No direct sunlight.
- Preferably using a cold light (>4500K), and not a monochrome light.
- No lighting changes during the measurement.
- The recommended minimal light level on the subject face is 400 LUX, and the light in room should be uniformly distributed
- Avoid any highly reflective objects in the room, such as mirrors, glass windows/tables, etc
- Avoid movement of other personnel in the vicinity of the subject.
- Measurement:
- Duration – The full measurement duration is 2.5 minutes.
- Vital signs appearance - each vital sign appears when there is sufficient data. However, there may be cases in which a summary value is not available for some vital signs.
PPG - By Finger
Note:
Wait 3 minutes between measurements to avoid device overheating.
When using the By Finger (PPG) mode, the following recommendations apply:
- Device:
- The mobile device should be in a fixed position during the entire measurement.
- The device should be held by hand.
- The device’s battery level should be at least 20%.
- Do not use the application when the device is in power save mode.
- Subject:
- The subject must be sitting or at rest during the measurement.
- The hand should rest comfortably at heart level.
- iOS - Use the index finger to fully cover both the rear flashlight and the relevant rear camera.
- Android - Use the index finger to fully cover the relevant rear camera, without covering the rear flashlight.
- When placing the finger on the camera, apply moderate pressure.
- Avoid movement of the finger during the measurement.
- Environmental conditions:
- Should not be in complete darkness.
- Measurement:
- Duration – The recommended duration for the finger measurement is 1.5 minutes (90 seconds).
Finger Placement for iOS devices when using PPG
Finger Placement for Android devices when using PPG
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