Computed Tomography (CT)
Preview Exam
Conventional tomography is called axial tomography because the plane of the image is parallel to the
long axis of the.... -Body
Conventional tomography is called axial tomography because the plane of the image is parallel to the
long axis of the body; this results in sagittal and... -coronal images.
A CT image is a transaxial or transverse image that is perpendicular to the long axis of the... -body.
The x-ray source and the detector move synchronously for... -computed tomography.
When the source-detector assembly makes one sweep, or translation, across the patient, the internal
structures of the body attenuate the x-ray beam according to their mass density and effective... -atomic
number.
At the end of this translation, the source detector assembly returns to its starting position, and the entire
assembly rotates and begins a second... -translation.
Computer processing of these projections involves effective superimposition of each projection to
reconstruct an image of the anatomical structures within that... -slice.
First-generation imaging system: translate and... -rotate.
First-generation imaging system: translate and rotate, pencil... -beam.
First-generation imaging system: translate and rotate, pencil beam, single... -detector.
First-generation imaging system: translate and rotate, pencil beam, single detector, 5-minute imaging... -
time.
Second-generation imaging system: translate and... -rotate.
Second-generation imaging system: translate and rotate, fan... -beam.
Second-generation imaging system: translate and rotate, fan beam, detector... -array.
Second-generation imaging system: translate and rotate, fan beam, detector array, 30-second imaging... -
time.
, This feature of the third-generation detector assembly also allows for better x-ray beam... -collimation.
This feature of the third-generation detector assembly also allows for better x-ray beam collimation and
reduces the effect of scatter... -radiation.
One of the principal disadvantages of third-generation CT imaging systems is the occasional appearance
of ring... -artifacts.
Third-generation imaging system: rotate and... -rotate.
Third-generation imaging system: rotate and rotate, fan beam, detector array, subsecond imaging time. -
beam.
Third-generation imaging system: rotate and rotate, fan beam, detector... -array.
Third-generation imaging system: rotate and rotate, fan beam, detector array, subsecond imaging... -time.
The fourth-generation CT imaging system incorporates a rotate and stationary... -configuration.
The x-ray source rotates, but the detector assembly does... -not.
Fourth-generation imaging systems were developed because they were free of ring... -artifacts.
Fourth-generation CT imaging system: rotate and stationary, fan beam, detector array, subsecond
imaging time. -stationary.
Fourth-generation CT imaging system: rotate and stationary, fan... -beam.
Fourth-generation CT imaging system: rotate and stationary, fan beam, detector... -array.
Fourth-generation CT imaging system: rotate and stationary, fan beam, detector array, subsecond
imaging... -time.
Today essentially all CT imaging systems are third-generation and have evolved into helical and
multislice... -imaging.
When the examination begins, the x-ray tube rotates... -continuously.
While the x-ray tube is rotating, the couch moves the patient through the plane of the rotating x-ray... -
beam.
The x-ray tube is energized continuously, data are collected continuously, and an image then can be
reconstructed at any desired z-axis position along the... -patient.
If one wishes to estimate a value between known values, that is... -interpolation.
if one wishes to estimate a value beyond the range of known values, that is... -extrapolation.
When an image is reconstructed, the plane of the image does not contain enough data for... -
reconstruction.
Data in that plane must be estimated by... -interpolation.
Linear interpolation at 180 degrees improves z-axis... -resolution.
Preview Exam
Conventional tomography is called axial tomography because the plane of the image is parallel to the
long axis of the.... -Body
Conventional tomography is called axial tomography because the plane of the image is parallel to the
long axis of the body; this results in sagittal and... -coronal images.
A CT image is a transaxial or transverse image that is perpendicular to the long axis of the... -body.
The x-ray source and the detector move synchronously for... -computed tomography.
When the source-detector assembly makes one sweep, or translation, across the patient, the internal
structures of the body attenuate the x-ray beam according to their mass density and effective... -atomic
number.
At the end of this translation, the source detector assembly returns to its starting position, and the entire
assembly rotates and begins a second... -translation.
Computer processing of these projections involves effective superimposition of each projection to
reconstruct an image of the anatomical structures within that... -slice.
First-generation imaging system: translate and... -rotate.
First-generation imaging system: translate and rotate, pencil... -beam.
First-generation imaging system: translate and rotate, pencil beam, single... -detector.
First-generation imaging system: translate and rotate, pencil beam, single detector, 5-minute imaging... -
time.
Second-generation imaging system: translate and... -rotate.
Second-generation imaging system: translate and rotate, fan... -beam.
Second-generation imaging system: translate and rotate, fan beam, detector... -array.
Second-generation imaging system: translate and rotate, fan beam, detector array, 30-second imaging... -
time.
, This feature of the third-generation detector assembly also allows for better x-ray beam... -collimation.
This feature of the third-generation detector assembly also allows for better x-ray beam collimation and
reduces the effect of scatter... -radiation.
One of the principal disadvantages of third-generation CT imaging systems is the occasional appearance
of ring... -artifacts.
Third-generation imaging system: rotate and... -rotate.
Third-generation imaging system: rotate and rotate, fan beam, detector array, subsecond imaging time. -
beam.
Third-generation imaging system: rotate and rotate, fan beam, detector... -array.
Third-generation imaging system: rotate and rotate, fan beam, detector array, subsecond imaging... -time.
The fourth-generation CT imaging system incorporates a rotate and stationary... -configuration.
The x-ray source rotates, but the detector assembly does... -not.
Fourth-generation imaging systems were developed because they were free of ring... -artifacts.
Fourth-generation CT imaging system: rotate and stationary, fan beam, detector array, subsecond
imaging time. -stationary.
Fourth-generation CT imaging system: rotate and stationary, fan... -beam.
Fourth-generation CT imaging system: rotate and stationary, fan beam, detector... -array.
Fourth-generation CT imaging system: rotate and stationary, fan beam, detector array, subsecond
imaging... -time.
Today essentially all CT imaging systems are third-generation and have evolved into helical and
multislice... -imaging.
When the examination begins, the x-ray tube rotates... -continuously.
While the x-ray tube is rotating, the couch moves the patient through the plane of the rotating x-ray... -
beam.
The x-ray tube is energized continuously, data are collected continuously, and an image then can be
reconstructed at any desired z-axis position along the... -patient.
If one wishes to estimate a value between known values, that is... -interpolation.
if one wishes to estimate a value beyond the range of known values, that is... -extrapolation.
When an image is reconstructed, the plane of the image does not contain enough data for... -
reconstruction.
Data in that plane must be estimated by... -interpolation.
Linear interpolation at 180 degrees improves z-axis... -resolution.
