TED: How we can use light to see deep inside our bodies and brains | Mary Lou Jepsen

The video explores the use of red and infrared light to improve healthcare by enabling non-invasive imaging of the human body. It demonstrates how light can pass through human tissue and bones, and how holography can be used to de-scatter light for clearer imaging. The technology allows for focusing light through brain tissue to a neuron, offering potential for portable, low-cost medical imaging. The video also discusses the use of sound and light for scanning, and highlights applications such as early cancer detection, stroke diagnosis, and brain-computer communication.

What is the main challenge when using red and near-infrared light to see through human tissue?

• The light causes damage to the tissue.

• The light scatters, making it hard to see clearly.

• The light is absorbed by the tissue.

• The light is too weak to penetrate.

What technology is used to overcome the scattering of light in tissues?

• Magnetic resonance

• X-ray imaging

• Holography

• Ultrasound

How does holography help in de-scattering light?

• By filtering out unwanted light

• By changing the light's wavelength

• By capturing all light rays and directing them

• By amplifying the light intensity

What is the significance of using red light in penetrating skull and bones?

• It is absorbed by bones.

• It is more powerful than gamma rays.

• It is cheaper than other light sources.

• It is less harmful than X-rays.

What is the focus size achieved by the new system when penetrating the brain?

• One millimeter

• Two microns

• Ten microns

• Six to eight microns

What is the main advantage of the new chip inventions in medical imaging?

• They reduce the resolution of the images.

• They increase the size of the system.

• They make the system more expensive.

• They allow for rapid scanning and de-scattering.

How does the new system compare to traditional MRI machines?

• It is compact and less costly.

• It requires more power to operate.

• It has a lower resolution.

• It is larger and more expensive.

What potential application does the technology have in stroke diagnosis?

• It can only detect strokes caused by clogs.

• It is only useful in hospitals.

• It can determine the type of stroke quickly.

• It requires surgical intervention.

How can the system aid in brain-computer communication?

• By requiring surgical procedures

• By using implants in the brain

• By noninvasively reading and writing neural signals

• By using a two-ton magnet

What is a significant feature of the system in detecting tumors?

• It requires a large MRI machine.

• It relies on the color change in blood.

• It can detect tumors by finding areas with less blood.

• It uses gamma rays to detect tumors.