Safety Minimizing Patient Exposure Flashcards
Which of the following can be used with digital imaging systems to reduce patient exposure?
- Higher kvp
- Increase beam filtration
- Use AEC
According to NCRP #102, when using over 70 KVP the total filtration in the primary beam must be at least how much?
2.5 mm Al
AECR is designed to compensate for changes in?
Patient positioning
Which of the following will reduce exposure to the patient as well as improve contrast resolution?
Beam restriction
Standard state that the exposure in air from fluoroscopic equipment shall not exceed how many coulomb/kg/minute?
2.58 x 10-3
Dose area product is defined by?
The multiplication of the dose and the area exposed
The source to scan distance for stationary fluoroscopy must not be less than how many centimeters?
38 cm
The dose rate at the table top during fluoroscopy cannot exceed how many milligray per minute?
100 milligray per minute
Standard state that the exposure in air from fluoroscopic equipment, shall not exceed this output per mA

21 mGy/minute
What method is used to determine if an x-ray tube has adequate filtration?
HVL measurement
What filter would produce an x ray beam with the highest average photon energy?
4 mm Al
What does not have an effect on patient dose?
Focal spot size
What situation would cause the greatest skin does to a patient?
Short SID
Which of the following are reasons for using beam restricting devices?
1. Reduce scatter radiation
2. Improve spatial resolution
3. Reduce patient exposure
1 and 3 only
What describes the system designed to turn off the x-ray beam when the proper exposure has been made at the image receptor?
AEC
