NEW
Font size
WorksheetsNARS PRELIMINARY QUIZ COMPETITION FOR CLINICAL STUDENTS
Total questions: 30
Worksheet time: 3mins
One of the following devices is only used for personnel monitoring?
OSL
TLD
Gieger-muller counter
Ionization chamber
Radiation protection is to?
Reduce the probability of stochastic effects of xrays
prevent the occurrence of deterministic effect of x-rays.
All of the above
None of the above
A good monitoring device should be
Expensive
Dollarised
Reliable and accurate
Fashionable
Radiosensitivity is a critical factor with
Cancer treatment and management
Radiation protection and safety standards
Environmental risk assessment and management
All of the above
Radiation induced DNA damage leads to
Apoptosis and Cell death
senescence and cellular aging
Mutations and genetic instability
All of the above
Which of the following is a stochastic effect of radiation exposure?
Skin erythema
GI syndrome
Cancer
Hematologic syndrome
Most effects on cells result in no response because of
Stochastic effects
Deterministic effects
Recovery and repair metabolic processes
all of the above
What is the maximum permissible dose of radiation for radiation workers per year?
0.5 Sv/yr
0.05 Sv/yr
0.005 Sv/yr
5 Sv/yr
what is the primary purpose of the dosimeter?
To measure radiation levels in the environment
To monitor individual radiation exposure
To enhance image quality
To provide patient comfort
Individuals in the general population are limited to
5 mSv/yr
1 mSv/yr
0.5 mSv/yr
0.1 mSv/yr
Beta particles can easily be shielded by
Paper
Rubber
Nylon
Aluminum
What is the purpose of a grid in radiography?
To increase patient dose
To reduce scatter radiation
To enhance image contrast
Both B and C
Which of the following is not the unit of effective dose?
Sievert
J/kg
100rem
100rad
These are forms of natural radiation except
Cosmic radiation
Terrestrial radiation
Broad radiation
Internal source
Which is the BEST definition of a wave?
The method by which the energy carried by visible light is propagated.
Travelling oscillations in the magnitude and direction of electric and magnetic fields that do not require a material medium.
A periodic disturbance in some property of the medium, the medium itself remains (relatively) at rest.
A mechanism for the transfer of energy without the transfer of matter.
What is the half-life of a radioactive isotope?
The time taken for half of the isotope to decay
The time taken for the isotope to become stable
The time taken for the isotope to be eliminated from the body
The time taken for the isotope to reach its maximum activity
The Compton and photo electric Interactions depend on the
Effective atomic number
Mass number
Attenuation
Filtration
The S.l unit of dose equivalent is
Grays
Coulombs/kg
Sievert
Rem
The crystal contained by thermo luminescent dosimeter is
Magnesium fluoride
Magnesium iodide
Calcium fluoride
Calcium iodide
The greatest contributor to terrestrial radiation is
Uranium
Rhodium
Tungsten
Thorium
The fundal gas in the chest radiograph can be located
below the cadiophrenic angle
below the costophrenic angle
above the cadiophrenic angle
above the costophrenic angle
Which position is commonly used for a lateral chest X-ray?
Prone
Supine
Erect
Decubitus
Which projection is best for visualizing the scaphoid bone in the wrist?
PA projection
lateral projection
Ulnar deviation projection
Oblique projection
Which imaging modality is best for evaluating soft tissue structures?
X-ray
CT scan
MRI
Ultrasound
One of these is NOT a radiation protection measure of A.P elbow projection
Appropriate use of exposure factors
Collimate strictly to area of interest.
The patient face should be turned towards the primary beam
All of the above
The cardinal principles of radiation protection include all but one
Time
Location
Shielding
Distance
What is the central ray angle for a lateral knee X-ray?
0⁰
45⁰
90⁰
180⁰
Which anatomical structure is best visualized in an AP projection of the ankle?
Calcaneus
Talus
Tibia
Cuboid
In a PA chest X-ray, the central ray is directed to which anatomical landmark?
C12
T5
T7
T12
What is the primary indication for performing a fluoroscopic examination of the gastrointestinal tract?
To visualize soft tissue and organ pathology
To visualize motility and function
To ascertain fluid imbalance
To establish pathological variations in smooth muscles and tissues
