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Physics For Radiographers 1 > Mock Exam > Flashcards

Mock Exam Flashcards

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1
Q

What is the inverse square law a result of?

A

Divergence

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2
Q

What is the binding energy of a K shell electron in a tungsten atom?

A

69.5 keV

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3
Q

Why does the anode heel affect occur?

A

Because of x-ray absorption in the anode

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4
Q

Why is molybdenum used for the anode stem?

A

It is a poor thermal conductor

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5
Q

What is thermionic emission?

A

The heating of the filament that leads to the release of electrons

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6
Q

What occurs through the vacuum to the glass envelope?

A

Radiation

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7
Q

What occurs through the oil to the casing?

A

Convection

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8
Q

Describe how to undertake and light beam diaphragm test

A

Requires a test tool and IR
Use normal FID, collimate to the test tool
Lower exposure and expose
Check alignment meets requirements

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9
Q

What is FID?

A

Focus to image receptor distance

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10
Q

What is the function of a scintillator?

A

Converts x-rays to light

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11
Q

What is the function of a semiconductor chip?

A

Converts light into electrical signal

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12
Q

Describe fibre optic in reference to indirect DR

A

Transmits light to CCD chip and stops x-rays being produced

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13
Q

What would happen if only scatter radiation reached the IR

A

Image contrast would be low

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14
Q

What is the main reason to use a grid?

A

Improve image contrast

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15
Q

Describe Detective Quantum Efficiency (DQE)

A

A measure of the percentage of x-rays that hit the detector that are absorbed

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16
Q

What is an RPS and what is their role?

A

Radiation Protection Supervisor
Oversee QA, ensuring equipment and PPE is safe for use
Dealing with radiation incidents
Dose monitoring and TLDs
Risk assesment

17
Q

What is a critical examination and what is its purpose?

A

An examination of x-ray equipment
Ensures all safety features and warning devices work correctly

18
Q

What is equivalent dose?

A

The dose quantity representing the stochastic effects of radiation on the body

19
Q

What are some qualities of a radiation detector?

A

Small size
Waterproof
Accurate
Unaffected by prescence of detector

20
Q

What is the Dose area product?

A

Method of radiation dose monitoring
Radiation dose received by a patient

Physics For Radiographers 1 (13 decks)

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