Medical Photonics: Using Lasers to Peer into Our Bodies

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Image for post
Photo by Dave Sebele on Unsplash

A Brief Overview on Light

A diagram of the electromagnetic spectrum of light, ranging from radio waves on the left, to X-rays on the right.
A diagram of the electromagnetic spectrum of light, ranging from radio waves on the left, to X-rays on the right.
A image describing the EM spectrum of light. Different states of energy dictate a different position and color on the spectrum, making some lights visible, and others invisible.
Infrared cameras detect infrared radiation precisely enough to showcase the vein patterns on a person’s hand.
Infrared cameras detect infrared radiation precisely enough to showcase the vein patterns on a person’s hand.
Infrared cameras detect infrared radiation precisely enough to showcase the vein patterns on this person’s hand. Blood is warm, and registers as relatively hotter than its surroundings, giving it a distinct color.

Medical Imaging

The Process

The tissue penetration of different wavelengths of light. We see a correlation between higher wavelength of light and higher
The tissue penetration of different wavelengths of light. We see a correlation between higher wavelength of light and higher
The tissue penetration of different wavelengths of light. We see a correlation between higher wavelength of light and higher tissue penetration. This is why CT scans use high wavelength radiation — for high penetration.
A nanoscale image constructed from photonic imaging techniques.
A nanoscale image constructed from photonic imaging techniques.
A nanoscale image constructed from photonic imaging techniques. In this image, we see a tumor leaching away oxygen from its surroundings (shown in blue). DOT will be very useful in the field of cancer monitoring and diagnosis.

Challenges

Penetration:

Cost:

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