Radiation Protection: Gonadal Shielding and AEC Systems

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Which technique helps reduce patient exposure in radiography?

Increasing the focal spot-to-image receptor distance

Using a lower X-ray tube voltage

Taking multiple images of the same region

Using an anti-scatter grid or air gap (correct)

What is the purpose of taking a preliminary image before a series of images?

To test the anti-scatter grid

To adjust the X-ray tube voltage

To confirm the correctness of settings and avoid retakes (correct)

To check the X-ray equipment's functioning

What is the purpose of an AEC device in radiography?

To increase the X-ray tube voltage

To adjust the focal spot-to-image receptor distance

To reduce irradiations and repeat irradiations to a minimum (correct)

To improve image resolution

When should the use of automatic exposure control be limited?

During thoraco-abdominal examinations Signup and view all the answers

What is the purpose of the operator evaluating the resulting images?

To verify diagnostic quality images and correct X-ray equipment functioning Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

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 Signup and view all the answers

What is the main contributor to ROI overexposure related to AEC?

Artifacts or prostheses with low atomic mass within the ROI Signup and view all the answers

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 Signup and view all the answers

What could lead to ROI underexposure in AEC when imaging a small anatomical area?

Not using AEC and resorting to manual techniques Signup and view all the answers

What is the primary way to ensure proper termination of radiographic exposure in AEC systems?

Keen understanding of AEC functioning Signup and view all the answers

What type of crystal is commonly used in solid state radiation detectors?

Silicon Signup and view all the answers

What is a primary advantage of using solid state radiation detectors over gas detectors?

Higher sensitivity Signup and view all the answers

Which component in radiographic units displays the actual amount of mAs used for an image?

mAs readout display Signup and view all the answers

How does knowledge of the mAs readout benefit a medical imaging technologist (MIT)?

Facilitates manual exposure technique adjustments Signup and view all the answers

In what position may Automatic Exposure Control (AEC) and manual technique be combined due to centering difficulties?

AP lumbar spine Signup and view all the answers

Why are solid state radiation detectors preferred over photocells in radiography?

Higher accuracy Signup and view all the answers

Radiation Protection: Gonadal Shielding and AEC Systems

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