Describe an acquisition method that has overlapping slices
What are any slice incrementation which is smaller than the slice thickness
100
What is the orientation that is required for a scout image of the brain.
What is a lateral scout.
100
This is the HU measurement for water
What is 0
200
What is the purpose of a consent form for intravenous contrast media.
What is to educate the patient regarding all aspects of the procedure to be performed. Including risks, benefits, and alternatives.
200
This is the largest deterrent to CT scanner contrast resolution.
What is noise
200
Describe three ways that a technologist can reduce patient radiation dose.
What are, strict clinical indication, protocol optimization, shielding.
200
Which two QC tests must be completed daily
What are CT number calibration and noise (standard deviation).
300
For what area of the body would the administration of intrathecal contrast be indicated.
What is the spine.
300
This is the matrix size most commonly used in CT
What is 512 x 512
300
Describe 3 parts of the technical parameters required to perform a high resolution CT examination of the temporal bones.
What are thin section widths (1.25 or less). Sharp kernel. Small (10 cm or less) DFOV of each side.
300
This is described as the degree of the CT section broadening that occurs along the z-axis during volumetric data acquisition is represented graphically by this.
What is the Slice Sensitivity Profile (SSP)
400
The device employed to monitor blood oxygen levels is called what?
What is a pulse oximeter.
400
Describe three advantages of spiral/helical CT
What are, reduced scan time, reduction of misregistration artifacts, and volumetic 3D data.
400
This is the description of portion of the cardiac cycle known as complete cardiac diastole.
What is when the Left and right ventricles and atria are relaxed and the T wave of the ECG.
400
An acquisition is made on a 4-slice MDCT system with a detector array of 16 1.25mm detector elements along the z-axis. With a selected beam width of 20mm, what beam pitch would result in the table moving 35mm for each rotation of the gantry.
What is 1.75
500
Which of the following are moderate adverse reactions to iodinated intravenous contrast media.
1. Shock
2. Faintness
3. Severe Vomiting
What are faintness and sever vomiting
500
Describe automatic tube current modulation (ATCM).
What is a software that will adjust the mA actively to reduce patient dose when possible.
500
This is the period of peak hepatic parenchymal enhancement following a rapid bolus injection of iodinated contrast.
What is the portal venous phase
500
What technical attribute enables an MDCT system to acquire motion-free images of the heart and surrounding vasculature