GXMO Exam | Verified Exam Questions and Answers | Latest Updated
Study Material 2026
Question:
Motion blurMotion blur
Answer:
1. Movement of the patient or the x-ray
tube during exposure results in blurring of the radiographic image. This loss of radiographic
quality, called motion blur, may result in repeated radiographs and therefore should be avoided.
Question:
2. Patient motion is usually caused by motion blur. Suspend respiration for exposures, decrease
exposure time, use a large SID and use a small OID.
Transverse
Answer:
across the table, at right angles to longitudinal.
Question:
Longitudinal
Answer:
along the long axis of the table.
Question:
Primary X-ray Beam
Answer:
The x-ray beam that leaves the tube and is
unattenuated, except by air. The direction and location are predictable and controllable.
Question:
X-ray source
Answer:
the x-ray tube between the cathode and anode.
,Question:
kVp
Answer:
Measure of the maximum electrical potential across an x-
ray tube (expressed in kilovolts).
Question:
mA
Answer:
Measure of x-ray tube current
Question:
Remnant Radiation
Answer:
X-rays that pass through the patient and
interact with the image receptor
Question:
Scatter Radiation
Answer:
X-rays scattered back in the direction of the
incident x-ray beam
Question:
Penetrate
Answer:
ability to pass through an object. Related to the x-ray
quality
Question:
Absorb
Answer:
to soak up. Absorption of x-rays results in energy being
scattered or converted into new scatter x-rays.
,Question:
Attenuation
Answer:
the total reduction in the number of x-rays
remaining in an x-ray beam after penetration through a given thickness of tissue
Question:
X-ray attenuation
Answer:
When a broad beam of x-rays is incident of
any tissue, some of the x-rays are absorbed and some are scattered. The result is a reduced
number of x-rays.
Question:
Differential attenuation
Answer:
X-rays can penetrate matter that is
opaque to light. This penetration is differential, depending on the mass density and thickness of
the matter
Question:
Basis for subject contrast
Answer:
i. determined by the size, shape, and x-
ray attenuating characteristics of the subject who is being examined and the energy of the x-ray
beam
Question:
Subject contrast
Answer:
the range of differences in the intensity of the x-
ray beam after it exists the patient. It is affected by the kVp and the tissue density
Question:
Effects on air, bone, muscle and fat
, Answer:
i. X-rays penetrate air very
readily. There is less penetration of fat or oil, even less of water, which has about the same mass
as muscle tissue, and still less of bone.
Question:
Intensity
Answer:
The intensity of the x-ray beam of an x-ray imaging
system is measured in milligray in air (mGya) and is called x-ray quantity.
Question:
Effects on intensity (quantity) of the x-ray beam on the radiographic image
Answer:
i. X-ray intensity is proportional to mAs.
Question:
ii. X-ray intensity is proportional to kVp2.
iii. X-ray intensity is inversely proportional to the square of the distance from the source.
X-rayintensityisreducedwhenfiltrationisadded
Extremity
Answer:
soft tissue and bone / low kV = high contrast (short
scale) kVp 50 - 70
Question:
Abdomen
Answer:
organs, air, fluid, and bowel patterns /low subject
contrast / kVp: 75 to 90
Question:
Chest
Answer:
Many structures to evaluate with different densities: lung,
Study Material 2026
Question:
Motion blurMotion blur
Answer:
1. Movement of the patient or the x-ray
tube during exposure results in blurring of the radiographic image. This loss of radiographic
quality, called motion blur, may result in repeated radiographs and therefore should be avoided.
Question:
2. Patient motion is usually caused by motion blur. Suspend respiration for exposures, decrease
exposure time, use a large SID and use a small OID.
Transverse
Answer:
across the table, at right angles to longitudinal.
Question:
Longitudinal
Answer:
along the long axis of the table.
Question:
Primary X-ray Beam
Answer:
The x-ray beam that leaves the tube and is
unattenuated, except by air. The direction and location are predictable and controllable.
Question:
X-ray source
Answer:
the x-ray tube between the cathode and anode.
,Question:
kVp
Answer:
Measure of the maximum electrical potential across an x-
ray tube (expressed in kilovolts).
Question:
mA
Answer:
Measure of x-ray tube current
Question:
Remnant Radiation
Answer:
X-rays that pass through the patient and
interact with the image receptor
Question:
Scatter Radiation
Answer:
X-rays scattered back in the direction of the
incident x-ray beam
Question:
Penetrate
Answer:
ability to pass through an object. Related to the x-ray
quality
Question:
Absorb
Answer:
to soak up. Absorption of x-rays results in energy being
scattered or converted into new scatter x-rays.
,Question:
Attenuation
Answer:
the total reduction in the number of x-rays
remaining in an x-ray beam after penetration through a given thickness of tissue
Question:
X-ray attenuation
Answer:
When a broad beam of x-rays is incident of
any tissue, some of the x-rays are absorbed and some are scattered. The result is a reduced
number of x-rays.
Question:
Differential attenuation
Answer:
X-rays can penetrate matter that is
opaque to light. This penetration is differential, depending on the mass density and thickness of
the matter
Question:
Basis for subject contrast
Answer:
i. determined by the size, shape, and x-
ray attenuating characteristics of the subject who is being examined and the energy of the x-ray
beam
Question:
Subject contrast
Answer:
the range of differences in the intensity of the x-
ray beam after it exists the patient. It is affected by the kVp and the tissue density
Question:
Effects on air, bone, muscle and fat
, Answer:
i. X-rays penetrate air very
readily. There is less penetration of fat or oil, even less of water, which has about the same mass
as muscle tissue, and still less of bone.
Question:
Intensity
Answer:
The intensity of the x-ray beam of an x-ray imaging
system is measured in milligray in air (mGya) and is called x-ray quantity.
Question:
Effects on intensity (quantity) of the x-ray beam on the radiographic image
Answer:
i. X-ray intensity is proportional to mAs.
Question:
ii. X-ray intensity is proportional to kVp2.
iii. X-ray intensity is inversely proportional to the square of the distance from the source.
X-rayintensityisreducedwhenfiltrationisadded
Extremity
Answer:
soft tissue and bone / low kV = high contrast (short
scale) kVp 50 - 70
Question:
Abdomen
Answer:
organs, air, fluid, and bowel patterns /low subject
contrast / kVp: 75 to 90
Question:
Chest
Answer:
Many structures to evaluate with different densities: lung,
