Compre Flashcards by lizzi mae cuenca

Is not a particulate radiation

Gamma

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The heaviest subatomic particle

Neutron

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How many electrons are there in k-shell?

2 (2n^2)
k=1

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What is no longer used in radiation therapy but has
energy to 10-15 kev?

Grenz Ray

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5.Which of the following uses low energy beam for
treatment?

Superficial

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Who specializes in treating cancer with chemotherapy

Medical Oncologist

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Who specializes in diagnosis and treatment of cancers
of blood?

Hematologist Oncologist

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What are referred to as type of malignancy
management intended to alleviate pain?

Palliative

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9.When is the source of cobalt 60 machine is replaced?

5-10 years

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10.Which of the following drug name which is coined
by the original manufacturer

Generic name

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11.Which of the following kV units uses 500 kVp - 1mV
treatment – Supervoltage therapy unit

Supervoltage therapy unit

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Which of the following kV units uses 150 kVp – 500
kVp –

orthovoltage

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Which of the following uses radiation for treatment at
a short distance and uses active isotopes –

Brachytherapy

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Which of the following is found in the head of xray

1,2, and 3

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Which of the following device is shaped as doughnut

Betatron

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16.A device that consists of two cylinders – Cyclotron
17.What gas ionization is used as calibration instrument
– Ionization Chamber
18.Which of the following is true about the dose rate –
increase with increased field size
19.What is normally measured during an optical
distance indicator – SSD

Cyclotron

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What gas ionization is used as calibration instrument

Ionization Chamber

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Which of the following is true about the dose rate

increase with increased field size

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What is normally measured during an optical
distance indicator

SSD

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.What is the term that refers to the distance from the
source to the isocenter

SAD

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What is the term that refers to the distance of the
source to skin

SSD

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Early somatic effect on an organ system that results
from high doses of radiation

deterministic

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Considered as radiosensitive

stem cells

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Radio resistant

muscle and nerve cell

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The majority of the radiation therapy treatment using SAD

100 cm

Inverse square law 110 cGy/min at 100 cm, what would be the best output at 2cm

27.5

A tissue equivalent material

Bolus

Are used commonly in combination with radthera except

Respiratory Therapy

The cobalt 60 has an energy of

1.25

The most commonly used immobilization device in head and neck

thermoplastic mask

The following modality can be used in imaging localization except

mammogram

This refers to the representation of the external body outline

Contour

Tumors in early stage

a and b

Which modality is not included in the management of cancer patient

NOTA

In treating breast cancer, the arm is at

90 degrees

How many electrons are there in cobalt 60

27 (atomic number)

What mode of decay where a neutron is converted to proton or electron

beta minus decay

Which of the following purposes of radthera where the treatment is to relieve symptoms and pain

palliative

Which radthera treatment is performed at a shirt distance

Brachytherapy

Which of the following factors govern organ and tissue response on radiation exposure

1,2,3 (growth rate, radiosensitivity, reproductive characteristics)

41.Which of the following is defined as a relative susceptibility of cells, tissues, and organs to the damaging effects of ionizing radiation

radiosensitivity

What is the principal advantage of isocentric treatment over SSD technique fir treatment for multiple chords

C (the patient is not moved in the treatment fields)

Disadvantages of parallel opposed field?

excessive tissue dose to above and below the tumor

A treatment which a source axis distance remains constant at all time is referred to as

isocentric technique

What radioactive material is used in treatment of carcinoma of uterus

Radium 226

Increase in field size will increase the

dose in build up region

As the energy of beam increases, the maximum dose is

deeper to the tissue

Adequate vermification of isodose charts from the manufacturer using

water phantom

Insertion of copper aluminum and tin filters into the xray beam causes

low energy xrays to be absorbed

Which photon interaction with matter is most likely to occur in radiation therapy

Compton Scattering

Which of the following is true regarding to the function of flattening filter

reduces the dose rate at the center of the unfiltered beam

PDD (Percentage Depth Dose) is significantly affected by

1,2,3,4

Which of the following increases PDD

1,2,3

What principle is described as a division of a total plan dose into numerous dose to be given in small doses

fractionation dose

Which of the following is not an example of internal radthera

teletherapy

What is described as atoms of elements that have the same number of elements with same number of protons different number of neutrons

Isotopes

What nuclear reactions occurs when the nuclei form together for a larger nucleus

fusion

Which of the following types of treatment is normally accomplished using a source to skin distance of 50 cm or more

Supervoltage and Megavoltage

The depth of the maximum ionization is most dependent on

beam energy

Split into smaller doses which helps cell recover during treatment

fraction

Where dose DMAX occur in cobalt 60 machine

0.5 cm

TPR TMR TAR

Tissue Phantom Ratio Tissue Maximum Ratio Tissue Air Ratio

.Which of the following describes the individual treatment dose

fractionation

Which of the following describes the total duration

protraction

What will be the dose to the spinal cord

47 Gy

Which technique is currently used where several beam intersect

crossfire

Dose of DMAX

TMR

Phantom

TPR

Free space

TAR

Used for dose calculation when treating isocentric field

TAR

Employed as a neo ajovan

pre operative or post operative

Tandem and obords are typically used for tumor less than normally cm

5 cm

What energy of radiation has a maximum dose above 4 cm

20 mV

The principal advantage of TAR is the inability to remove

SSD

In a single SSD technique the dose is relatively normalized at

DMAX

This refers to the area that encompassed by the 50% isodose

physical random field

The following are true about the acceptability criteria using, except

maximum dose to the tissue greater than 110

Which of the following properties of isodose curves is considered true

A (the dose is greatest at the central axis and progresses