Mosby's Exam Review for CT 2025/2026
Exam Questions and Answers 100%
Guaranteed Success | Already Rated A+
180-dgree linear interpolation (180 LI) - 🧠ANSWER ✔✔Type of algorith
used for MSCT image reconstruction in which data acquired from a shorter
distance (180 degrees) away from the reconstructed slice location are
interpolated.
absorbed dose - 🧠ANSWER ✔✔the amount of x-ray energy absorbed in a
unit of mass. It is measured in grays. (Gy)
360-degree linear interpolation (360 LI) - 🧠ANSWER ✔✔type of algorithm
used for MSCT image reconstruction in which two sets of projection data
acquired 360 degress apart are used to form an image at a precise z-axis
location.
absorptopm efficiency - 🧠ANSWER ✔✔the ability of an individual CT
detector to absorb and measure the transmitted x-ray intensity incident
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,upon it. primarilly controlled by the characteristics and physical makeup of
the detector material.
adaptive array - 🧠ANSWER ✔✔the type of MSCT detector array configured
with the thinnest detectors at the center, surrounded by detectors of
incrementally increasing widths along the z-axis.
advanced single-slice rebinning (ASSR) algorithm - 🧠ANSWER ✔✔cone
beam correction algorithm used to overcome potential attenuation
calculation errors from the divergent beam of MSCT systems.
afterglow - 🧠ANSWER ✔✔the tendency of a scintillation-type CT detector to
continue to glow in response to x-radiation after the exposure source has
been terminated.
Agatston score - 🧠ANSWER ✔✔quantification of the volume and density of
calcium within the coronary arteries. as calculated a CT coronary artery
calcification (CAC) examination, the Agatston score is used to indicate a
patient's risk of suffering a cardiac event.
ALARA - 🧠ANSWER ✔✔acronym for "as low as reasonably achievable,"
the cardinal principle of radiation dose reduction for all radiologic
procedures, including CT.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
,algorithm - 🧠ANSWER ✔✔mathematical filter applied to raw data during
image reconstruction to remove blurring artifact inherent to back-projection.
may also be referred to as kernel.
aliasing - 🧠ANSWER ✔✔a form of streak artifact caused by an isufficient
number of views (data samples) obtained during data acquisition.
analog-to-digital converter - 🧠ANSWER ✔✔component of the data
acquisition system (DAS) responsible for converting the electronic signal
emitted by the CT detectors into digital form.
archival - 🧠ANSWER ✔✔the storage of CT data in either hard (film) or soft
(digital) form.
array processor - 🧠ANSWER ✔✔component of the CT computer system
responsible for receiving raw scan data, performing all of the major
processing of the CT image, and returning the reconstructed image to the
storage memory of the host computer.
arterial phase - 🧠ANSWER ✔✔period of peak arterial enhancement
following the bolus IV administration of iodinated contrast materia. for
example, the hepatic arterial phase occurs approximately 25-35 seconds
after the initiation of contrast agent administration.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, Artifact - 🧠ANSWER ✔✔a form of noise on the CT image resulting from
errors during the measurement of transmitted radiation by the detectors.
attenuation - 🧠ANSWER ✔✔the reduction in intensity of a radiation beam
as it passes through a substance.
attenuation coefficient - 🧠ANSWER ✔✔the value assigned to an object
quantifying its ability to attenuate an x-ray beam
back-projection - 🧠ANSWER ✔✔the mathematical process of CT image
reconstruction whereby ray sum data are projected back onto a matrix.
automatic tube current modulation (ATCM) - 🧠ANSWER ✔✔CT system
software used to adjust mA throughout an acquisition to reduce patient
radiation dose to a minimum.
beam hardening - 🧠ANSWER ✔✔the phenomenom whereby low-energy
photons are absorbed as the x-ray beam passes through an object,
resulting in an increase in the average photon energy of the x-ray beam.
beam pitch - 🧠ANSWER ✔✔the ratio of table feed per gantry rotation to the
total collimation used during acquisition with a multi-slice (MSCT) system.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
4
Exam Questions and Answers 100%
Guaranteed Success | Already Rated A+
180-dgree linear interpolation (180 LI) - 🧠ANSWER ✔✔Type of algorith
used for MSCT image reconstruction in which data acquired from a shorter
distance (180 degrees) away from the reconstructed slice location are
interpolated.
absorbed dose - 🧠ANSWER ✔✔the amount of x-ray energy absorbed in a
unit of mass. It is measured in grays. (Gy)
360-degree linear interpolation (360 LI) - 🧠ANSWER ✔✔type of algorithm
used for MSCT image reconstruction in which two sets of projection data
acquired 360 degress apart are used to form an image at a precise z-axis
location.
absorptopm efficiency - 🧠ANSWER ✔✔the ability of an individual CT
detector to absorb and measure the transmitted x-ray intensity incident
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
1
,upon it. primarilly controlled by the characteristics and physical makeup of
the detector material.
adaptive array - 🧠ANSWER ✔✔the type of MSCT detector array configured
with the thinnest detectors at the center, surrounded by detectors of
incrementally increasing widths along the z-axis.
advanced single-slice rebinning (ASSR) algorithm - 🧠ANSWER ✔✔cone
beam correction algorithm used to overcome potential attenuation
calculation errors from the divergent beam of MSCT systems.
afterglow - 🧠ANSWER ✔✔the tendency of a scintillation-type CT detector to
continue to glow in response to x-radiation after the exposure source has
been terminated.
Agatston score - 🧠ANSWER ✔✔quantification of the volume and density of
calcium within the coronary arteries. as calculated a CT coronary artery
calcification (CAC) examination, the Agatston score is used to indicate a
patient's risk of suffering a cardiac event.
ALARA - 🧠ANSWER ✔✔acronym for "as low as reasonably achievable,"
the cardinal principle of radiation dose reduction for all radiologic
procedures, including CT.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
2
,algorithm - 🧠ANSWER ✔✔mathematical filter applied to raw data during
image reconstruction to remove blurring artifact inherent to back-projection.
may also be referred to as kernel.
aliasing - 🧠ANSWER ✔✔a form of streak artifact caused by an isufficient
number of views (data samples) obtained during data acquisition.
analog-to-digital converter - 🧠ANSWER ✔✔component of the data
acquisition system (DAS) responsible for converting the electronic signal
emitted by the CT detectors into digital form.
archival - 🧠ANSWER ✔✔the storage of CT data in either hard (film) or soft
(digital) form.
array processor - 🧠ANSWER ✔✔component of the CT computer system
responsible for receiving raw scan data, performing all of the major
processing of the CT image, and returning the reconstructed image to the
storage memory of the host computer.
arterial phase - 🧠ANSWER ✔✔period of peak arterial enhancement
following the bolus IV administration of iodinated contrast materia. for
example, the hepatic arterial phase occurs approximately 25-35 seconds
after the initiation of contrast agent administration.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
3
, Artifact - 🧠ANSWER ✔✔a form of noise on the CT image resulting from
errors during the measurement of transmitted radiation by the detectors.
attenuation - 🧠ANSWER ✔✔the reduction in intensity of a radiation beam
as it passes through a substance.
attenuation coefficient - 🧠ANSWER ✔✔the value assigned to an object
quantifying its ability to attenuate an x-ray beam
back-projection - 🧠ANSWER ✔✔the mathematical process of CT image
reconstruction whereby ray sum data are projected back onto a matrix.
automatic tube current modulation (ATCM) - 🧠ANSWER ✔✔CT system
software used to adjust mA throughout an acquisition to reduce patient
radiation dose to a minimum.
beam hardening - 🧠ANSWER ✔✔the phenomenom whereby low-energy
photons are absorbed as the x-ray beam passes through an object,
resulting in an increase in the average photon energy of the x-ray beam.
beam pitch - 🧠ANSWER ✔✔the ratio of table feed per gantry rotation to the
total collimation used during acquisition with a multi-slice (MSCT) system.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
STATEMENT. ALL RIGHTS RESERVED
4
