Sim Lab Final

Question 1

Which component of the linear accelerator would only amplify microwaves?

Answer 1

klystron

Question 2

What is the most common and economical material used for radiation barriers?

Answer 2

concrete

Question 3

Which imaging technique can visualize the MLC’s and treatment field?

Answer 3

MV portal imaging

Question 4

The wall that absorbs the useful beam is known as a:

Answer 4

primary barrier

Question 5

Which component of the linear accelerator would generate microwaves?

Answer 5

magnetron

Question 6

What would prevent microwaves from re-entering the klystron?

Answer 6

circulator

Question 7

What device is used to spread the beam of electrons when utilizing electron therapy?

Answer 7

scattering foil

Question 8

The distance from the source of radiation to the isocenter is known as:

Answer 8

target to axis distance

Question 9

The klystron is located within the:

Answer 9

drive stand

Question 10

The beam flattening filter is used for what type of treatments?

Answer 10

photon

Question 11

What area of the brain would you expect to find involved if a patient had vision problems?

Answer 11

occipital

Question 12

What is the average survival for patients with brain metastasis

Answer 12

3 months

Question 13

Steroids are used to:

Answer 13

decrease inflammation

Question 14

A patient with brain mets may report: (3)

Answer 14

-loss of memory
-change in gait
-nausea

Question 15

Metastatic brain disease differs from primary brain malignancy in that:

Answer 15

Metastasis is usually multifocal and primaries are solitary at the time of diagnosis.

Question 16

A patient with brain metastasis begins to have a seizure right before his treatment. The therapist should:

Answer 16

assist the patient to a safe position for the prevention of injury

Question 17

Collimator rotation for the left lateral whole brain field is 30 degrees (neutral collimator angle is 0 degrees). The collimator angle for the right lateral field should be:

Answer 17

330 degrees

Question 18

The total separation of my patient’s skull at the approximate location of isocenter is 15 cm. Opposing, midline treatment ports will require monitor unit calculations for a depth of:

Answer 18

7.5 cm

Question 19

The _____________ lobe of the brain has a role in person’s personality.

Answer 19

frontal

Question 20

What lobe in the cerebrum is the most posterior?

Answer 20

occipital

Question 21

On CT scan, the texture of this structure resembles that of cauliflower, and is gray in color.

Answer 21

cerebellum

Question 22

The most inferior portion of the brain stem is:

Answer 22

medulla oblongata

Question 23

What structures of the brain are horn shaped?

Answer 23

lateral ventricles

Question 24

What is covering the brain closest to the skull?

Answer 24

dura mater

Question 25

What extension of the dura mater separates the cerebellum from the cerebrum?

Answer 25

tentorium cerebelli

Question 26

Cerebrospinal fluid is contained within the ___________ space.

Answer 26

subarachnoid

Question 27

This bone contains the dorsum sellae:

Answer 27

sphenoid

Question 28

What structure within the brain is responsible for supplying arterial blood to the cerebrum?

Answer 28

circle of willis

Question 29

The preferred imaging modality for the diagnosis of brain tumors is:

Answer 29

MRI

Question 30

The most common malignancy of the brain is:

Answer 30

metastatic disease

Question 31

Which of the following would be considered a palliative dose of radiation for a brain metastasis?

Answer 31

300cGy x 10fx = 3000cGy

Question 32

Regional lymphatics are not usually included in radiation fields for palliation because:

Answer 32

Disease spread is assumed to have already taken place

Question 33

Primary side effect from whole brain irradiation:

Answer 33

alopecia

Question 34

Most common anatomic primary sites to metastasize to brain are: (2)

Answer 34

-breast -lung

Question 35

A typical field size for the treatment of T5 - T10 would be:

Answer 35

8x15 cm

Question 36

When treating a patient who has disease in the cervical spine, the best position among the following would be:

Answer 36

supine with the head in a neutral position

Question 37

Cervical spine would be treated using what treatment technique

Answer 37

opposed laterals (AP/PA)

Question 38

Which of the following radionuclides may be used in treating metastatic bone disease?

Answer 38

Strontium-89

Question 39

Daily treatment charges for a single field spine with no blocking (MLC) or beam modifiers (wedges) would be simple or complex

Answer 39

simple

Question 40

At what vertebral level does the spinal cord end?

Answer 40

L2

Question 41

In spinal cord compression and vena cava syndrome, high doses of radiation are given in the first few treatments. The following doses are typical (tapering does):

Answer 41

300 - 400 cGy per fraction

Question 42

A t-shaped radiation field would likely be seen in the treatment of:

Answer 42

Spinal cord compression in the lower lumbar region

Question 43

Single posterior fields are not usually adequate for lower lumbar or sacral bone metastasis because:

Answer 43

This region of the spine has lordotic curvature

Question 44

Select all presenting symptoms of SVC: (2)

Answer 44

-cyanosis -venous distention

Question 45

A patient with SVC syndrome appears to have fainted during administration of therapy. The therapist should:

Answer 45

Stop the treatment, assess vital signs, and call physician or nurse

Question 46

Response to SVC treatment is typically seen in:

Answer 46

3-4 days

Question 47

Most of the SVC's are from:

Answer 47

lung cancer

Question 48

What are the primary causes of gynecological hemorrhage?

Answer 48

late stage endometrium or cervical cancer

Question 49

The radiation treatment borders (AP/PA) for an emergent bleeding gynecological patient are:

Answer 49

-Sup: Iliac Crest -Inf:Obturator Foramen or 2-3cm below the disease -Lat:1.5-2cm margin on widest portion of pelvic brim

Question 50

T or F: Radiation to the local site can stop the bleeding by activating anti-coagulating cells.

Answer 50

False (coagulating)

Question 51

When treating the pelvis for gynecological cancer, what is not an organ at risk?

Answer 51

liver

Question 52

The uterus is located posterior to the:

Answer 52

bladder

Question 53

Initial standard radiation dose for emergent gynecological patient:

Answer 53

3.5 Gy x 4 fx

Question 54

Gantry & Collimator rotations for whole brain

Answer 54

Right lateral: Gantry @ 270 & Collimator @ 30 Left lateral: Gantry @ 90 & Collimator @ 330