Best practices for using the application

Best practices for using the application

rPPG - By Face

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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.
    • The subject should have a fully exposed face and look at the screen throughout the whole measurement.

    • The subject must stay still as much as possible and avoid any movement (including talking)

    • 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

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Finger Placement for Android devices when using PPG

 

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