IV contrast material is better visualized.
Streak artifacts are reduced or eliminated.
The patient is more comfortable during scanning.
The patient receives a lower radiation dose.
High mA and short scan time.
Low kVp and high contrast, or bone algorithm.
Adjust the angle of the gantry and widen the window width.
Small focal spot and small display field.
Radiation Dose to the Patient
Middle cerebral Artery
Detector singal drift sensitivity
Spurious signals from moving signal wires
Incident beam collimation
Increase the field of view.
Decreasing field of view.
Increasing section thickness.
Decreasing section thickness.
Filtered back projection
Reduced partial volume averaging and improved spatial resolution
Decreased scan time, and more anatomy covered
Linear attenuation coefficient.
Partial volume averaging.
Low contrast resolution.
Edge gradient averaging.
Region of interest
Wider section thickness
Increased detection efficiency
High spatial detectibilty
Low spatial detectibilty
High contrast detectibilty
Low contrast detectibilty
Helical / spiral
The computer overcorrects for beam hardening
The beam encounters metal in the body
The body hardens the beam thus lowering the attenuation numbers in the center
The body hardens the beam thus increasing the attenuation numbers in the center
Tube arcing artifacts
Beam hardening artifacts
Partial volume artifacts
Full volume artifacts
Low contrast artifact
Edge gradient artifact
Equipment induced artifact
Here's an interesting quiz for you.