Medical Imaging and Body Systems Flashcards

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1
Q

Name the 4 commonly used diagnostic imaging techniques

A

Conventional Radiography (ordinary x-ray)
Computerized tomography (CT)
Ultrasonography (US)
Magnetic Resonance Imaging (MRI)

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2
Q

What do the beams of x-rays do?

A

Penetrate the body

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3
Q

What absorbs the most x-ray?

A

Compact bone

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4
Q

What absorbs the least x-ray?

A

Air

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5
Q

What is it called when structures not looking like they’re in their places because of raduodensity/radiolucency

A

Superimposing

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6
Q

_________ structures absorb x-rays

A

Radiodense

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7
Q

_________ structures don’t absorb x-rays

A

Radiolucent

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8
Q

Name most radiodense to least radiodense

A
Compact bone 
Spongy bone 
Water and most tissue 
Fat
Air
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9
Q

Name most radiolucent to least radiolucent

A
Air 
Fat 
Water and most tissues 
Spongy bone 
Compact bone
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10
Q

What is contract media?

A

Radiopaque fluids

  • Iodine compound
  • Barium
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11
Q

What do radiopaque fluids (like iodine compounds and barium) help with?

A
Visualising 
Digestive tract
Blood vessels 
Urinary tract 
Synovial cavities
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12
Q

What is the imaging that uses x-ray, but it’s source and receiver rotated around axis of the body? Stacks 2D slices and can reconstruct 3D anatomy structures.

A

Computerized Tomography

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13
Q

Is there superimposition with computerized tomography, just like x-rays?

A

No

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14
Q

What is ultrasoography?

A

Ultrasonic waves bounce back from tissues. Non invasive. No radiation used.

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15
Q

What does MRI stand for?

A

Magnetic resonance imaging

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16
Q

What is patient placed in for MRI? What causes the image?

A

Strong magnetic field. Interaction between radiowaves and the hydrogen in H2O molecules.

17
Q

What is TM1 and TM2 in MRI scans?

A

T1
Fat is white
T2
Water is white