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FOR BOARDS > boards > Flashcards

boards Flashcards

1
Q

what’s the site of distant mets for medulloblastoma

A

bone

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2
Q

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

A

10% in 6 months

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3
Q

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

A

to reduce internal scatter

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4
Q

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

A

false

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5
Q

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

A

adriamycin

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6
Q

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

A

4

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7
Q

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

A

breast cancer

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8
Q

the pituitary gland is located

A

2 cm superior and 2 cm anterior to the EAM

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9
Q

the parotid gland is located

A

2.5 cm inferior and 2.5 cm anterior to the EAM

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10
Q

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

A

reed-sternberg cells

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11
Q

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

A

para-aortic, mediastinal, supraclavicular

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12
Q

what is the lymphatic drainage for the lip

A

submandibular, preauricular, facial nodes

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13
Q

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

A

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

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14
Q

the prostate is located

A

inferior to the urinary bladder and anterior to the rectum

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15
Q

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

A

temporal

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16
Q

occupational annual non-stochastic effective dose equivalent limit

A

500 mSv

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17
Q

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

A

inguinal

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18
Q

what are the borders for a mantle field

A

mastoid to T10

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19
Q

tissue air ratio is mostly related to ___ set ups

A

isocentric

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20
Q

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

A

film badge and TLD ring badge

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21
Q

the wedge angle specifies the

A

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

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22
Q

Mayneord’s F-factor is used to convert

A

inverse square correction for PDD

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23
Q

PDD has a direct relationship with

A

field size, energy, and SSD

24
Q

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

A

main power breaker

25
Q

the off axis ratio is the

A

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

26
Q

A T1 larynx treatment involves

A

wedges, opposed lateral treatment portals

27
Q

what is the average transmission leaf for a varian linac

A

<2.5%

28
Q

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

A

I, II, III

29
Q

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
A

less skin surface dose and max tumor dose

30
Q

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
A

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

31
Q

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
A

employs moving collimation to alter isodose distribution

32
Q

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.

A

500 mSv- 50 rem

33
Q

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

A

prodromal syndrome

34
Q

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

A

Bragg gray theory

35
Q

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

A

indirect hit theory

36
Q

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

A

leukemia

37
Q

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

A

18 MV

38
Q

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

A

Compton effect

39
Q

the dose build up region is

A

0.5 cm

40
Q

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

A

Fall

41
Q

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

A

Age x 10 mSv

42
Q

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

A

90 degres

43
Q

machine dose rate constancy is most commonly checked using

A

ion chambers

44
Q

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

A

distilled water

45
Q

constancy checks for all linear accelerator should be performed

A

daily

46
Q

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:

A

collimator scattering

47
Q

1 Sv = __ rem

A

100 rem

48
Q

1 Gy= __ rad

A

100 rad

49
Q

the photoelectric effect is principally associated with

A

absorption of incident photon

50
Q

which of the following is found around the renal hilus

A

renal pelvis

51
Q

the longest portion of the large intestine is the

A

transverse colon

52
Q

the quality factor for x, gamma or beta radiation

A

1

53
Q

the quality factor for alpha particles

A

20

54
Q

the quality factor for neutrons of unknown energy

A

10

55
Q

the quality factor for high energy protons

A

10

56
Q

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

A

fundus

FOR BOARDS (23 decks)

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