How is it possible to get a subject’s Core Temperature by non-invasive means?

Humans generate their temperature by internal body processes.  Clothing is one method to prevent the heat which radiates from their skin, Skin Surface Temperature (SST), from escaping.  Nature also gives humans a method that helps retain their heat which is their skin tone.   The scientific name for this is emissivity and it varies between persons depending on where their ancestors originated.  Thermowand Technologies has developed a means that uses a highly sensitive infrared sensor that not only can detects human temperatures from 3 feet away but also detect skin color by use of a camera.  We are able to non-invasively detect the core temperature of this facial scan as opposed to other core temperature readings obtained by sensor placement within the body such as, an anal thermometer.

Attached below is the inventor’s report of one human trial included in his doctoral dissertation at Pace University that demonstrates this feature.  US patent #11209316 protected.