boards

Question 1

what’s the site of distant mets for medulloblastoma

Answer 1

bone

Question 2

hodgkin lymphoma patients who experience the symptoms of unexplained weight loss lose how much in how long?

Answer 2

10% in 6 months

Question 3

why is a testicular shield used for male patients in pelvic irradiation of Hodgkin Lymphoma

Answer 3

to reduce internal scatter

Question 4

T/F Peu d’orange skin is a sign of good prognosis in patients with breast cancer

Answer 4

false

Question 5

what single agent chemo drug is commonly used to treat breast cancer

Answer 5

adriamycin

Question 6

a supraclav field is included in the treatment for breast cancer when ___ axillary nodes are positive

Answer 6

4

Question 7

what’s the most common cancer site in American women?

Answer 7

breast cancer

Question 8

the pituitary gland is located

Answer 8

2 cm superior and 2 cm anterior to the EAM

Question 9

the parotid gland is located

Answer 9

2.5 cm inferior and 2.5 cm anterior to the EAM

Question 10

the presence of which cell, along with other hematological findings are most indicative of Hodgkin’s disease

Answer 10

reed-sternberg cells

Question 11

lymphatic spread of testicular cancers follow a specific pattern, what is the correct order

Answer 11

para-aortic, mediastinal, supraclavicular

Question 12

what is the lymphatic drainage for the lip

Answer 12

submandibular, preauricular, facial nodes

Question 13

because meninges encase the whole brain and extend along the optic nerve into the orbit it is imperative the __ is included in the treatment field

Answer 13

total orbital, the tip of the temporal lobe, the first two cervical spines

Question 14

the prostate is located

Answer 14

inferior to the urinary bladder and anterior to the rectum

Question 15

which lobe of the brain is treated in a German helmet technique that is not necessarily encompassed in a standard clinical brain field arrangement

Answer 15

temporal

Question 16

occupational annual non-stochastic effective dose equivalent limit

Answer 16

500 mSv

Question 17

involvement of the __ nodes is most common when the lesion located in the lower third of the vagina

Answer 17

inguinal

Question 18

what are the borders for a mantle field

Answer 18

mastoid to T10

Question 19

tissue air ratio is mostly related to ___ set ups

Answer 19

isocentric

Question 20

what type of monitoring device should be worn during brachytherapy by physics personel

Answer 20

film badge and TLD ring badge

Question 21

the wedge angle specifies the

Answer 21

the angle between a perpendicular line through the central axis and the 50% isodose line

Question 22

Mayneord’s F-factor is used to convert

Answer 22

inverse square correction for PDD

Question 23

PDD has a direct relationship with

Answer 23

field size, energy, and SSD

Question 24

if a table moves during the treatment and the off button on the console does not work what do you do first

Answer 24

main power breaker

Question 25

the off axis ratio is the

Answer 25

ratio of the dose at a given depth at a point away from the central axis and the dose at a point along the central axis at the same depth

Question 26

A T1 larynx treatment involves

Answer 26

wedges, opposed lateral treatment portals

Question 27

what is the average transmission leaf for a varian linac

Answer 27

<2.5%

Question 28

Which of the following are true of integral dose? I. Measures total absorbed dose in the treatment volume II. Product of mass and dose if dose received is uniform III. Unit of measure is the gram-rad

Answer 28

I, II, III

Question 29

in IMRT therapy a patient will receive - no port films - less skin surface dose and max tumor dose - more skin surface dose and less tumor dose - none of the above

Answer 29

less skin surface dose and max tumor dose

Question 30

The proper way of source disposal is to. - Flush it down the drain - Put in the trash - Seal it in a lead container then put in the trash - Put in a lead container and after it’s been calculated to be safe and then put in the trash

Answer 30

put it in a lead container and after it's been calculated to be safe and then put in the trash

Question 31

a dynamic wedge - employs moving collimation to alter isodose distributions - requires repeated insertion and removal of various individual wedges during treatment - both of the above - none of the above

Answer 31

employs moving collimation to alter isodose distribution

Question 32

According to the 1987 NCRP recommendations, the annual dose limit for non-stochastic (somatic) effects to all tissues, other than the eye, should not exceed.

Answer 32

500 mSv- 50 rem

Question 33

the symptoms of early radiation sickness, nausea and vomiting, at doses of radiation between 1 and 2 gray are classified as the

Answer 33

prodromal syndrome

Question 34

the energy absorbed in the surrounding medium around a gas filled cavity can be determined by the

Answer 34

Bragg gray theory

Question 35

the process by which energy from an ionizing radiation is transferred from an irradiated molecule to a non irradiated molecule is called the

Answer 35

indirect hit theory

Question 36

which of the following is not considered a somatic non- stochastic effect of radiation

Answer 36

leukemia

Question 37

neutron contamination outside of the radiotherapy beam is of concern for which energy

Answer 37

18 MV

Question 38

most of the energy imparted to tissue in the radiotherapy range is due to

Answer 38

Compton effect

Question 39

the dose build up region is

Answer 39

0.5 cm

Question 40

if the room temperature should significantly increase during a calibration session, the standard readings taken with an open ionization chamber would.

Answer 40

Fall

Question 41

According to the 1987 NCRP recommendations, the guidance level for cumulative exposure should be calculated using the formula.

Answer 41

Age x 10 mSv

Question 42

during a split field test for longitudinal displacement of the collimator for jaw symmetry, the collimator is rotated to angles of

Answer 42

90 degres

Question 43

machine dose rate constancy is most commonly checked using

Answer 43

ion chambers

Question 44

when calibrations are attempted for electron beams, the preferred phantom material is

Answer 44

distilled water

Question 45

constancy checks for all linear accelerator should be performed

Answer 45

daily

Question 46

during the calibration of a high energy x-ray beam, an increase in field size will increase the exposure rate. the principle reason for this is:

Answer 46

collimator scattering

Question 47

1 Sv = __ rem

Answer 47

100 rem

Question 48

1 Gy= __ rad

Answer 48

100 rad

Question 49

the photoelectric effect is principally associated with

Answer 49

absorption of incident photon

Question 50

which of the following is found around the renal hilus

Answer 50

renal pelvis

Question 51

the longest portion of the large intestine is the

Answer 51

transverse colon

Question 52

the quality factor for x, gamma or beta radiation

Answer 52

1

Question 53

the quality factor for alpha particles

Answer 53

20

Question 54

the quality factor for neutrons of unknown energy

Answer 54

10

Question 55

the quality factor for high energy protons

Answer 55

10

Question 56

what is the saclike dilatation of the upper end of the stomach

Answer 56

fundus