Medical Physics - Unit 3 - EM Radiation Medicine

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12 Terms

1

X-Ray Scan

When X-rays move through the body, the EM wave is either absorbed or transmitted depending on its radiological density. The more radiation a medium absorbs, the lighter it looks.

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2

CT Scan

X-Ray scans are taken at a range of angles around the object and then combined to form a 3D image.  

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3

Eye Anatomy

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4

Concave Lens

Diverging Lens

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5

Convex Lens

Converging Lens

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6

Converging Lens

Refracts light so the rays bend to a single point after moving through the lens.

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7

Diverging Lens

Refracts light so the rays bend and spread out after moving through the lens.

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8

Reflection

When part of the wave energy bounces off the interface and travels back into the original media

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9

Refraction

The change in direction of an EM wave after passing through a new medium.

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10

EM Spectrum

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11

Relationship between wavelength, frequency and energy

As the wavelength decreases, the energy and frequency increase.

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12

EM Wave

This kind of wave has both an electric and magnetic field with identical wavelength, period and frequency. It travels faster through less dense materials and can travel through a vacuum.

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