Protection of Patients Week 3 Flashcards

1
Q

Two principal factors that reduce patient dose using beam restriction

A

Kilovoltage and Irradiated materials

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2
Q

What will allow fewer photons to be emitted and fewer scatter photons created?

A

Using the smallest collimation field possible.

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3
Q

Three beam limiting devices

A

Aperature diaphragms, cones, collimators

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4
Q

What is the best beam limitation of a cone/cylinder?

A

When it is long and the diameter of the hole is small

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5
Q

What is the most commonly used and versatile beam limitation device?

A

Collimators

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6
Q

What is the advantages of filters?

A

They absorb low energy, long wavelength photons which improves quality of the beam

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7
Q

2 types of filterations

A

inherent (built in) and Added (added to the design as increased filtration)

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8
Q

Measure of the total filtration when using over 70 kVp

A

2.5 mm Al

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9
Q

Gonadal shield best used in sterile field procedure

A

Shadow shield

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10
Q

3 types of gonadal shields

A

Flat Contact, Shadow, Shaped contact

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11
Q

Procedure that produces the greatest radiation exposure in diagnostic radiography

A

Fluoroscopic

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12
Q

In CR imaging what parameters are recoverable, preventing retakes

A

Overexposure up to 500% or underexposure up to 80%

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13
Q

Accurate and effective in reducing patient dose

A

Patient positioning

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14
Q

A way to ensure against irradiating a woman in the early stages of pregnancy

A

Institute elective scheduling for non emergency procedures

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15
Q

Causes of repeat radiographs

A

dirty screens, incorrectly loaded cassettes, light leaks, chemical fog, processor artifacts

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