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Failed Exam Questions > Lauras Exam 4 > Flashcards

Lauras Exam 4 Flashcards

1
Q

Which machine components are located within the gantry?

A

Electron gun
Accelerator structure

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2
Q

Which part of the machine houses the ion chambers?

A

Gantry Head

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3
Q

List the order of machine parts in the linac head for a photon treatment:

A

Target, primary collimators, flattening filter, ion chamber, secondary collimators, MLCs
TPFISM

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4
Q

Which agency is responsible for regulating the manufacturing of linear accelerators?

A

FDA

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5
Q

PPD is affected by:

A

Energy
Depth
SSD

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6
Q

Which part of the machine houses the electron gun?

A

Gantry

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7
Q

Which organ does NOT have a tolerance dose of 4500 cGy?

A

Heart

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8
Q

Which machine components are located within the drive stand?

A

Klystron
Circulator

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9
Q

When viewing an axial image, which directions can the patient be moved in?

A

Ant, Post
Left, Right

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10
Q

Which type of breast surgery removes chest wall muscles?

A

Radical Mastectomy

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11
Q

Removal of breast, tissue, areola, nipple

A

Total Mastectomy

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12
Q

What part of the machine houses the Klystron?

A

Drive stand

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13
Q

What is the typical gantry angle used for supraclavicular fields?

A

10-15 degrees

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14
Q

When viewing sagittal images, which directions can the patient be moved in?

A

Ant, Post
Sup, Inf

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15
Q

Compared to machines that only treat complex treatments, machines that treat SBRT treatments have:

A

Smaller laser tolerances

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16
Q

If MLCs move only when the beam turns off, this is known as:

A

Step and shoot

17
Q

The most common pathology for tumors in the urethra are?

A

Squamous

18
Q

Most common pathology for ureters is:

A

Transitional cell

19
Q

Which device is MR safe?

A

aneurysm clip

-no epids, hearing aids, breast balloons

20
Q

What is the laser tolerance for a linac that performs IMRT treatments?

A

1.5mm

21
Q

What is the purpose of imaging studies before brachytherapy?

A

To identify the location and size of the tumor
To ensure that the radioactive source is placed in the correct location
To minimize the damage to healthy tissue

22
Q

Which of the following would be a reason why supraclavicular fields are included in breast treatments?

A

Stage N2-N3
4+ positive axillary lymph nodes

23
Q

Which factor has an inverse relationship with PDD?

A

Depth

24
Q

Which material would have the highest stopping power for electrons?

A

lead

25
Q

How is field size related to PDD?

A

As field size increases, PDD increases due to scatter

26
Q

The patient is positioned head first prone for a PA treatment. The patient is accidentally treated with a posterior isoshift of 3 cm. How does this affect the dose to the planned isocenter?

A

Planned iso is underdosed

27
Q

Atomic nuclei with differing Z numbers, but the same A number?

A

isobar

28
Q

Which QA tests should be performed at least daily?

A

lasers
output

NOT
Light field/Radiation field coincidence
Emergency off buttons

29
Q

Which of the following particles has the highest ionizing power?

A

alpha

30
Q

Which of the following types of radiation can be detected using a Geiger-Muller counter?

A

Gamma

31
Q

What does CPT stand for in medical billing and coding?

A

Current procedural terminology

32
Q

What is the standard fractionation scheme for whole brain radiation therapy?

A

30 Gy x 10 fx

33
Q

PDD vs. PPD

A

PDD= energy, field size, SSD
PPD= energy, field size, depth

Failed Exam Questions (7 decks)

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