1 CT REGISTRY (MIC MODULE 1)
QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
CT is commonly referred to as - ANSWER 1 Computed tomography
2 Computerized Axial Tomography
3 CAT-scan
Control the operator has over the x-rays in a CT exam - ANSWER the energy level and the quantity of x-
rays can be selected
X-rays are produced whenever fast-moving electrons collide with any form of matter because - ANSWER
the electron loses kinetic energy which is converted into the emission of an x-ray photon
kV - ANSWER is the voltage potential between the tube cathode and anode
controls the energy level of the x-ray photons
mA - ANSWER controls the filament current thus ultimately the temperature of the cathode filament
controls the number of x-ray photons emitted from the tube
the type of detector material used - ANSWER does NOT affect the quantity of x-rays that completely
penetrates the patient
affects the quantity of x-rays that completely penetrate the patient - ANSWER 1. the distance the x-ray
photons most travel on their course through the patient's body
2. the molecular composition of the tissues through which the x-ray photons pass
, C - ANSWER
a component NOT located in the gantry of a modern CT system - ANSWER array processor
components normally located in the gantry of a modern CT system - ANSWER solid-state collimators
x-ray tube
pre-patient collimators
true statements regarding the collection of CT data - ANSWER 1. the detectors measure only those x-rays
which completely penetrate the body.
2. to collect the complete set of CT data, x-rays must be passed through the body at many different
angles
3. the reconstruction process used to create the image occurs in the array processor
why are x-rays used in CT - ANSWER They penetrate the body according to specific attenuation
characteristics of each tissue
Bremsstrahlung radiation does include these types of electron activities - ANSWER 1. collision between
an incoming electron and the nucleus of the target atom.
2. slowing down of an incoming electron due to the effect of passing close to the positive charge of the
nucleus of the target atom
Bremsstrahlung radiation does NOT include this type of electron activity - ANSWER collision between an
incoming electron and an electron in an inner shell of the target atom
reason why tungsten is used as the target material on the tube's anode - ANSWER it has high atomic
number and a high melting point
QUESTIONS AND ANSWERS WITH
SOLUTIONS 2024
CT is commonly referred to as - ANSWER 1 Computed tomography
2 Computerized Axial Tomography
3 CAT-scan
Control the operator has over the x-rays in a CT exam - ANSWER the energy level and the quantity of x-
rays can be selected
X-rays are produced whenever fast-moving electrons collide with any form of matter because - ANSWER
the electron loses kinetic energy which is converted into the emission of an x-ray photon
kV - ANSWER is the voltage potential between the tube cathode and anode
controls the energy level of the x-ray photons
mA - ANSWER controls the filament current thus ultimately the temperature of the cathode filament
controls the number of x-ray photons emitted from the tube
the type of detector material used - ANSWER does NOT affect the quantity of x-rays that completely
penetrates the patient
affects the quantity of x-rays that completely penetrate the patient - ANSWER 1. the distance the x-ray
photons most travel on their course through the patient's body
2. the molecular composition of the tissues through which the x-ray photons pass
, C - ANSWER
a component NOT located in the gantry of a modern CT system - ANSWER array processor
components normally located in the gantry of a modern CT system - ANSWER solid-state collimators
x-ray tube
pre-patient collimators
true statements regarding the collection of CT data - ANSWER 1. the detectors measure only those x-rays
which completely penetrate the body.
2. to collect the complete set of CT data, x-rays must be passed through the body at many different
angles
3. the reconstruction process used to create the image occurs in the array processor
why are x-rays used in CT - ANSWER They penetrate the body according to specific attenuation
characteristics of each tissue
Bremsstrahlung radiation does include these types of electron activities - ANSWER 1. collision between
an incoming electron and the nucleus of the target atom.
2. slowing down of an incoming electron due to the effect of passing close to the positive charge of the
nucleus of the target atom
Bremsstrahlung radiation does NOT include this type of electron activity - ANSWER collision between an
incoming electron and an electron in an inner shell of the target atom
reason why tungsten is used as the target material on the tube's anode - ANSWER it has high atomic
number and a high melting point
