Lauras Exam 3

Question 1

A photon strikes an object and scattered radiation occurs. This is due to:

Answer 1

Compton effects

Question 2

After drawing blood from a patient with a disease, the nurse accidentally sticks herself with the needle when trying to recap it. Later she finds she has contracted the patient’s disease. This transmission is called:

Answer 2

Vehicle-borne

Question 3

Palladium 103 seeds are most commonly used for:

Answer 3

Prostate LDR

Question 4

Which diagnostic imaging procedures do NOT utilize radiation?
1. Ultrasound
2. Nuclear medicine
3. Radiography
4. Computed Tomography
5. Magnetic Resonance Imaging

Answer 4

1, 5

Question 5

The akimbo position means:

Answer 5

The patient’s arms are bowed outwards with their hands on their hips

Question 6

The tolerance for 1/3 of the Liver?

Answer 6

5000 cGy

Question 7

Out of the following photon beam energies, which would require the highest HVL (given the absorber material is the same)?
-511 KV
-1.2 KV
-4 MV
-6 MV

Answer 7

6 MV

Question 8

The pancreas is located at the level of:

Answer 8

L1

Question 9

A medical event is when the total dose delivered to a patient is at least _____ different from prescribed dose.

Answer 9

20%

Question 10

The staging system used for cancers in the bowel:

Answer 10

Dukes

Question 11

The ________ is responsible for creating reports for medical events.

Answer 11

RSO

Question 12

Which of the following beam energies would give the highest skin dose?
1.25 MV
250 KV

Answer 12

250 KV

Question 13

The upper part of the stomach is called:

Answer 13

FUndus

Question 14

Cancers in which of the following organs can spread through skip metastasis

Answer 14

esophagus

Question 15

Which of the following effects describes cancer?
1. Stohastic
2. Non-stochastic
3. Deterministic
4. Threshold
5. Non-Threshold

Answer 15

1, 5

Question 16

What is used to store and share radiographic images electronically?

Answer 16

PACS

Question 17

Which of the following is chosen by the planner during inverse planning: 1. Beam energy 2. Field size 3. Beam direction 4. Tissue tolerance 5. Total dose

Answer 17

4, 5

Question 18

Bone Marrow Transplant (BMT) is an optimal treatment choice for all of the following EXCEPT:

Answer 18

CLL

Question 19

A patient’s skin dose will increase for a MV photon beam by all of the following EXCEPT:

Answer 19

Increasing Beam Energy

Question 20

Which of the following radiation measurements takes into account the quality factor?

Answer 20

Rem

Question 21

Which diagnostic scan shows the tumor’s activity?

Answer 21

PET

Question 22

Convert 100 rads into Gy

Answer 22

1 (1 rad = 1 cGy/ 100 cGy = 100 rad = 1 Gy)

Question 23

Tumors in the epithelium are classified as:

Answer 23

Carcinoma

Question 24

Sarcomas are of _____ origin:

Answer 24

Mesenchymal

Question 25

A common treatment of thyroid cancer:

Answer 25

I-131

Question 26

Which of the following will decrease the response to radiation?

Answer 26

Amifostine

Question 27

Distant spread from tumors in the small bowel is commonly to:

Answer 27

Liver

Question 28

The energy range of a superficial therapy unit is:

Answer 28

50-150 kV

Question 29

The chemotherapy combination used for Non-Hodgkin’s lymphoma is

Answer 29

CHOP

Question 30

What organ is used as a landmark to divide stages for Hodgkin’s lymphoma

Answer 30

Diaphragm

Question 31

______ is how long the machine will run per week.

Answer 31

Workload

Question 32

The relationship between distance and dose is:

Answer 32

Inverse square

Question 33

What provides power to the electron gun?

Answer 33

Modulator

Question 34

The daily check for CT number of water is 0 +/- __

Answer 34

5 HU

Question 35

Left breast tangents should be billed as:

Answer 35

Complex Tx

Question 36

Temporary epilation occurs at a dose of at least

Answer 36

2000 cGy

Question 37

Neutron contamination can occur in the linac head at energies of ____ and above .

Answer 37

10 MV

Question 38

Which of the four R’s is least desirable for tumor cells?

Answer 38

Repopulation