Computed Tomography Questions With
Accurate Answers
a circular device that houses the x-ray tube, DAS, and detector array is called
correct answer gantry
a narrow window width would display correct answer high contrast
a patient involved in a car accident is brought to the radiology department for CT
scan of the head, which lesion is most readily detected on non contrast image
correct answer acute subdural hematoma
a pixel with a size of 2 mm refers to its size on the correct answer imaged
structure
a relative comparison of x-ray attenuation of a voxel of tissue to an equal volume
of water correct answer CT number
a volume element is called correct answer voxel
air or gas will have an approximate CT number of about correct answer -1000
all of these affect radiation dose in CT correct answer beam energy
tube current
section/slice thickness
, an advantage of a fan-type beam and the multiple detector array used in a
multislice CT scanner correct answer reduction in patient motion
quicker image acquisition
increased scanning speed
CT is the examination of choice for correct answer head trauma
during a CT imaging procedure the visual representation of the picture elements
such as vertical or horizontal row and columns is termed as correct answer image
matrix
during a CT imaging procedure, which of the following in not controlled by the
computer in order to maintain the desired image quality correct answer desired
patient factors
(controlled are proper processing parameters, appropriate image display
parameters, desired exposure parameters)
during any type of computer assisted technique the gray scale level can be
enhanced by the adjustment of correct answer multi format camera controls
during CT imaging of the chest, a window level and width having a range of CT
numbers from -900 and -400 indicated the principal tissue of interest correct
answer lung tissue
Accurate Answers
a circular device that houses the x-ray tube, DAS, and detector array is called
correct answer gantry
a narrow window width would display correct answer high contrast
a patient involved in a car accident is brought to the radiology department for CT
scan of the head, which lesion is most readily detected on non contrast image
correct answer acute subdural hematoma
a pixel with a size of 2 mm refers to its size on the correct answer imaged
structure
a relative comparison of x-ray attenuation of a voxel of tissue to an equal volume
of water correct answer CT number
a volume element is called correct answer voxel
air or gas will have an approximate CT number of about correct answer -1000
all of these affect radiation dose in CT correct answer beam energy
tube current
section/slice thickness
, an advantage of a fan-type beam and the multiple detector array used in a
multislice CT scanner correct answer reduction in patient motion
quicker image acquisition
increased scanning speed
CT is the examination of choice for correct answer head trauma
during a CT imaging procedure the visual representation of the picture elements
such as vertical or horizontal row and columns is termed as correct answer image
matrix
during a CT imaging procedure, which of the following in not controlled by the
computer in order to maintain the desired image quality correct answer desired
patient factors
(controlled are proper processing parameters, appropriate image display
parameters, desired exposure parameters)
during any type of computer assisted technique the gray scale level can be
enhanced by the adjustment of correct answer multi format camera controls
during CT imaging of the chest, a window level and width having a range of CT
numbers from -900 and -400 indicated the principal tissue of interest correct
answer lung tissue
