CT Board Review - Medical CT Registry
Exam Review
What is an advantage of scans of the pituitary taken in the coronal plane?
A.) IV contrast material is better visualized.
B.) Streak artifacts are reduced or eliminated.
C.) The patient is more comfortable during scanning.
D.) The patient receives a lower radiation dose. - Answer-B.) Streak artifacts are reduced or eliminated.
Which two strategies can reduce the effect of dental fillings in a sinus study?
A.) High mA and short scan time.
B.) Low kVp and high contrast, or bone algorithm.
C.) Adjust the angle of the gantry and widen the window width.
D.) Small focal spot and small display field. - Answer-C.) Adjust the angle of the gantry and widen the
window width.
Which of the following conditions may be visualized in a CT study of the brain?
A.) Glioblastoma
B.) Wilm's Tumor
C.) Krukenberg Tumor
, D.) Plasmacytosis - Answer-A.) Glioblastoma
Which of the following is affected by the slice spacing in a CT study?
A.) Spatial Resolution
B.) Quantum Mottle
C.) Radiation Dose to the Patient
D.) Signal-to-Noise Ration - Answer-C.) Radiation Dose to the Patient
What is the name of the pinecone-shaped structure of the brain the can often be seen as calcified in CT
images? - Answer-Pineal Gland
Third generation (rotate/rotate) scanners overcame which of the following limitations?
A.) Detector singal drift sensitivity
B.) Translation motion
C.) Spurious signals from moving signal wires
D.) Cost - Answer-B.) Translation motion
What helical or spiral computed tomography term is defined as the table increment in distance per mm
per 360 degrees gantry rotation divided by the section thickness in mm? - Answer-Pitch
What determines the section thickness? - Answer-Incident beam collimation
What effect would an array processor failure have on image processing? - Answer-Increase image
display time.
What change will occur in the number of detected photons if a section thickness is changed from 5 mm
to 10mm? - Answer-Increase 100%
Exam Review
What is an advantage of scans of the pituitary taken in the coronal plane?
A.) IV contrast material is better visualized.
B.) Streak artifacts are reduced or eliminated.
C.) The patient is more comfortable during scanning.
D.) The patient receives a lower radiation dose. - Answer-B.) Streak artifacts are reduced or eliminated.
Which two strategies can reduce the effect of dental fillings in a sinus study?
A.) High mA and short scan time.
B.) Low kVp and high contrast, or bone algorithm.
C.) Adjust the angle of the gantry and widen the window width.
D.) Small focal spot and small display field. - Answer-C.) Adjust the angle of the gantry and widen the
window width.
Which of the following conditions may be visualized in a CT study of the brain?
A.) Glioblastoma
B.) Wilm's Tumor
C.) Krukenberg Tumor
, D.) Plasmacytosis - Answer-A.) Glioblastoma
Which of the following is affected by the slice spacing in a CT study?
A.) Spatial Resolution
B.) Quantum Mottle
C.) Radiation Dose to the Patient
D.) Signal-to-Noise Ration - Answer-C.) Radiation Dose to the Patient
What is the name of the pinecone-shaped structure of the brain the can often be seen as calcified in CT
images? - Answer-Pineal Gland
Third generation (rotate/rotate) scanners overcame which of the following limitations?
A.) Detector singal drift sensitivity
B.) Translation motion
C.) Spurious signals from moving signal wires
D.) Cost - Answer-B.) Translation motion
What helical or spiral computed tomography term is defined as the table increment in distance per mm
per 360 degrees gantry rotation divided by the section thickness in mm? - Answer-Pitch
What determines the section thickness? - Answer-Incident beam collimation
What effect would an array processor failure have on image processing? - Answer-Increase image
display time.
What change will occur in the number of detected photons if a section thickness is changed from 5 mm
to 10mm? - Answer-Increase 100%
