Safety Flashcards
The quantity of radiation dose received by the patient from a series of CT scans is referred to as the:
MSAD
Which of the following technical characteristics of a CT system does NOT directly affect patient dose?
A. Source-to-detector distance
B. Filtration
C. Detector efficiency
D. Filament size
D
Which of the following statements most accurately describes the relationship between slice sensitivity profile (SSP) and dose profile?
The dose profile is always wider than the SSP
The approximate radiation dose measured during a scan of a 100-mm-long pencil ionization chamber is termed the:
CTDI 100
The calculation of the average cumulative dose to each section within an acquisition of multiple sections is termed the:
MSAD
The multiple-scan average dose (MSAD) is used to describe the:
average dose to a single section within a scan of multiple sections.
Which of the following units is used to quantify effective dose?
Sievert (Sv)
If you increase detector pitch you will ——- pt dose
Decrease pt dose
The interaction between x-radiation and tissue that results in the complete loss of all x-ray photon energy is called:
photoelectric absorption
If you decrease pitch you will —— pt dose
Increase pt dose
A best practice for the use of in-plane bismuth shielding requires the:
placement of shield after the acquisition of scout (localizer) images.
Which of the following is the unit of radiation exposure?
Roentgen (R)
A dose check system features which of the following?
- Dose notification
- Dose alert
- Dose report
1 and 2
Current CT systems employ which of the following image reconstruction methods to reduce patient radiation dose?
Iterative reconstruction
As a patient size decreases, noise ———
Image noise is directly related to patient size. As a patient size decreases, noise decreases