18 Questions
Which technique helps reduce patient exposure in radiography?
Using an anti-scatter grid or air gap
What is the purpose of taking a preliminary image before a series of images?
To confirm the correctness of settings and avoid retakes
What is the purpose of an AEC device in radiography?
To reduce irradiations and repeat irradiations to a minimum
When should the use of automatic exposure control be limited?
During thoraco-abdominal examinations
What is the purpose of the operator evaluating the resulting images?
To verify diagnostic quality images and correct X-ray equipment functioning
What is the benefit of using the highest X-ray tube voltage that produces good quality images?
It produces images of good quality while minimizing patient exposure
What could be a possible cause of ROI underexposure in AEC related to ionization chambers?
Small anatomical areas imaged without full coverage by the chamber
What could mitigate ROI underexposure when the ionization chamber is beneath a structure with higher tissue density in AEC?
Repositioning the patient to center the ROI over the ionization chamber
What is the main contributor to ROI overexposure related to AEC?
Artifacts or prostheses with low atomic mass within the ROI
In the context of AEC, how can one address premature exposure cut-off resulting from excessive scatter radiation reaching the ionization chambers?
Closing collimation for better scatter control
What could lead to ROI underexposure in AEC when imaging a small anatomical area?
Not using AEC and resorting to manual techniques
What is the primary way to ensure proper termination of radiographic exposure in AEC systems?
Keen understanding of AEC functioning
What type of crystal is commonly used in solid state radiation detectors?
Silicon
What is a primary advantage of using solid state radiation detectors over gas detectors?
Higher sensitivity
Which component in radiographic units displays the actual amount of mAs used for an image?
mAs readout display
How does knowledge of the mAs readout benefit a medical imaging technologist (MIT)?
Facilitates manual exposure technique adjustments
In what position may Automatic Exposure Control (AEC) and manual technique be combined due to centering difficulties?
AP lumbar spine
Why are solid state radiation detectors preferred over photocells in radiography?
Higher accuracy
Test your knowledge on the use of gonadal shielding and AEC systems in radiation protection. Understand the importance of ensuring proper collimation of the x-ray beam when using gonadal shields and the significance of AEC systems in maintaining consistent exposure levels.
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