RADIOLOGY PHYSICS TEST PAPER 2026/2027 QUESTIONS
AND SOLUTIONS RATED A+
✔✔Imaging Receptor (IR) - ✔✔Digital radiography panels are commonly used for high
quality imaging, often with an integrated, intuitive software interface.
✔✔What are the key components in an x-ray room? - ✔✔Ceiling suspended tube crane,
a floating table top, a wall stand, a high frequency generator, IR
✔✔How does the x-ray tube work? - ✔✔It is a Pyrex glass vacuum tube. Electrons are
accelerated from the hot cathode (-) filament toward the anode surface (+).
✔✔Controlled areas - ✔✔Occupied by employees/staff whose occupational dose is
monitored
✔✔Uncontrolled areas - ✔✔Occupied by pts, visitors, non-radiation employees
✔✔Primary barrier - ✔✔Radiation from source
✔✔secondary barrier - ✔✔Scattered radiation from pt
Leakage radiation from tube
✔✔Medical x-ray units fall under two broad categories - ✔✔Diagnostic x-ray units
Therapeutic x-ray units
✔✔Therapeutic x-ray units - ✔✔Used for disease treatment by targeting extremely high
energy ionizing radiation to malignant tissues.
Radiation therapy
✔✔What is the approximate energy of x-rays in the therapeutic range? - ✔✔Mega-volts;
MV 10^6 volts
✔✔Diagnostic x-ray units - ✔✔They are used to obtain diagnostic images known as
radiographs.
✔✔fluroscopy - ✔✔Diagnostic imaging modality that uses x-ray to provide continuous
images of the motion of internal structures.
Also referred to as real time imaging
✔✔What is the diagnostic x-ray range? - ✔✔bb30 to 150 keV
mA10-1200 milliamperes
Time of 0.001-10secs
Kilovoltage of 30-150kVp
, ✔✔True or False. X-ray units can be both fixed and mobile
Fixed: equipment that remains in one place
Mobile: equipment can be moved from one place to another - ✔✔True
✔✔Tomographic x-ray unit - ✔✔Diagnostic x-ray imaging system that uses synchronous
motion of x-ray tube and image receptor about a fixed point in a plane of tissue to blur
out superimposing anatomy to produce sectional images or slices of the anatomy.
✔✔Both computed tomography and digital tomosynthesis imaging produce cross-
sectional images. True or false ? - ✔✔True
✔✔computed tomography (CT) - ✔✔Involves creation of a cross-section image with a
rotating fan beam
✔✔Urologic imaging system - ✔✔Systems designed to allow the pt to be placed in the
lithotomy position for a urologic study
✔✔Special angiography/interventional rooms - ✔✔Fluoroscopy Equipment with digital
subtraction capabilities and two or more overhead radiographic tubes.
✔✔Control booth - ✔✔A separated area or room where the x-ray machine operator can
remain safe from radiation while operating radiography equipment. It is protected by a
special wall and/or window lined with lead. This area houses the control console, which
contains the settings for the machine.
Secondary protective barrier
✔✔Three principle components of a diagnostic x-ray imaging system - ✔✔The
operating console
The x-ray tube
The high voltage generator
✔✔What is the primary function of an x-ray imaging system - ✔✔to convert electric
energy into electromagnetic energy
✔✔What are the various types of tube support and suspension systems? - ✔✔Floor to
ceiling suspended
Floor mounted
Ceiling suspended or overhead suspension
C-arm
✔✔What is a C-arm? - ✔✔A type of radiography equipment that utilizes a c-shaped arm
device to support the tube and the image receptor.
It allows the tube to be rotated to new positions
Mainly used in fluoroscopy.
AND SOLUTIONS RATED A+
✔✔Imaging Receptor (IR) - ✔✔Digital radiography panels are commonly used for high
quality imaging, often with an integrated, intuitive software interface.
✔✔What are the key components in an x-ray room? - ✔✔Ceiling suspended tube crane,
a floating table top, a wall stand, a high frequency generator, IR
✔✔How does the x-ray tube work? - ✔✔It is a Pyrex glass vacuum tube. Electrons are
accelerated from the hot cathode (-) filament toward the anode surface (+).
✔✔Controlled areas - ✔✔Occupied by employees/staff whose occupational dose is
monitored
✔✔Uncontrolled areas - ✔✔Occupied by pts, visitors, non-radiation employees
✔✔Primary barrier - ✔✔Radiation from source
✔✔secondary barrier - ✔✔Scattered radiation from pt
Leakage radiation from tube
✔✔Medical x-ray units fall under two broad categories - ✔✔Diagnostic x-ray units
Therapeutic x-ray units
✔✔Therapeutic x-ray units - ✔✔Used for disease treatment by targeting extremely high
energy ionizing radiation to malignant tissues.
Radiation therapy
✔✔What is the approximate energy of x-rays in the therapeutic range? - ✔✔Mega-volts;
MV 10^6 volts
✔✔Diagnostic x-ray units - ✔✔They are used to obtain diagnostic images known as
radiographs.
✔✔fluroscopy - ✔✔Diagnostic imaging modality that uses x-ray to provide continuous
images of the motion of internal structures.
Also referred to as real time imaging
✔✔What is the diagnostic x-ray range? - ✔✔bb30 to 150 keV
mA10-1200 milliamperes
Time of 0.001-10secs
Kilovoltage of 30-150kVp
, ✔✔True or False. X-ray units can be both fixed and mobile
Fixed: equipment that remains in one place
Mobile: equipment can be moved from one place to another - ✔✔True
✔✔Tomographic x-ray unit - ✔✔Diagnostic x-ray imaging system that uses synchronous
motion of x-ray tube and image receptor about a fixed point in a plane of tissue to blur
out superimposing anatomy to produce sectional images or slices of the anatomy.
✔✔Both computed tomography and digital tomosynthesis imaging produce cross-
sectional images. True or false ? - ✔✔True
✔✔computed tomography (CT) - ✔✔Involves creation of a cross-section image with a
rotating fan beam
✔✔Urologic imaging system - ✔✔Systems designed to allow the pt to be placed in the
lithotomy position for a urologic study
✔✔Special angiography/interventional rooms - ✔✔Fluoroscopy Equipment with digital
subtraction capabilities and two or more overhead radiographic tubes.
✔✔Control booth - ✔✔A separated area or room where the x-ray machine operator can
remain safe from radiation while operating radiography equipment. It is protected by a
special wall and/or window lined with lead. This area houses the control console, which
contains the settings for the machine.
Secondary protective barrier
✔✔Three principle components of a diagnostic x-ray imaging system - ✔✔The
operating console
The x-ray tube
The high voltage generator
✔✔What is the primary function of an x-ray imaging system - ✔✔to convert electric
energy into electromagnetic energy
✔✔What are the various types of tube support and suspension systems? - ✔✔Floor to
ceiling suspended
Floor mounted
Ceiling suspended or overhead suspension
C-arm
✔✔What is a C-arm? - ✔✔A type of radiography equipment that utilizes a c-shaped arm
device to support the tube and the image receptor.
It allows the tube to be rotated to new positions
Mainly used in fluoroscopy.
