RADIOLOGY LECTURE 6 ~~~~~~

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What is a potential risk when imaging with a broad exposure range?

The image may be overexposed and unclear.

The patient may receive too high a dose without obvious indication. (correct)

The staff may be exposed to increased radiation levels.

The equipment may malfunction, producing poor quality images.

Who is primarily protected by the regulations under IRMER 17?

Patients receiving radiographic procedures. (correct)

Radiation Protection Advisors and Supervisors.

The general public exposed to radiation.

Healthcare staff working in imaging departments.

Which of the following percentages represents digital imaging usage from 2017?

72% for digital, split into 54% phosphor plates and 18% direct digital. (correct)

54% for film and 46% for digital.

40% for digital and 60% for film.

28% for digital, with no breakdown available.

How can the ALARP principle be effectively implemented in a radiographic setting?

By ensuring thorough training and regular equipment checks. Signup and view all the answers

What is the purpose of thyroid shields and lead aprons during imaging?

To minimize the effects of scattered beams. Signup and view all the answers

What is a key factor in collimation that aids in dose optimization?

Employing a rectangular collimator to match the film shape. Signup and view all the answers

Which exposure factor is NOT commonly associated with an X-ray machine?

Distance. Signup and view all the answers

What is a recommended practice for staff to reduce their radiation exposure?

Use shielding and maintain distance from X-ray procedures. Signup and view all the answers

What is the maximum annual dose limit for classified workers in a radiation environment?

20 mSv Signup and view all the answers

Which of the following components is NOT typically included in a document detailing local rules for radiation exposure?

Recommendations for patient comfort Signup and view all the answers

Which guidance is recommended regarding dental radiography for pregnant women?

Radiographs may be delayed for emotional comfort if non-urgent. Signup and view all the answers

What role does the Medical Physics Expert (MPE) primarily fulfill in radiation safety?

Optimizes dosage and follows the ALARP principle. Signup and view all the answers

What is the purpose of a dosimeter in radiation safety?

To detect and measure radiation doses. Signup and view all the answers

What should always be checked to justify a radiographic procedure?

Patient clinical history and prior imaging Signup and view all the answers

How can image quality be preserved when adjusting mAs settings?

Balance the lowest mAs with exposure time. Signup and view all the answers

Which characteristic is associated with digital imaging compared to film?

More sensitive to X-rays, resulting in lower doses. Signup and view all the answers

What is the role of the referrer in the radiographic process?

Justifies the radiographic exposure based on clinical need. Signup and view all the answers

Which of the following describes the controlled area in a dental setting?

An area outside the primary beam and beyond a certain distance from the X-ray source. Signup and view all the answers

When is it necessary to use thyroid shields in dental radiography?

When the thyroid gland is directly in the primary beam. Signup and view all the answers

What is the significance of Diagnostic Reference Levels (DRLs) in radiographic procedures?

They indicate typical doses for standard examinations. Signup and view all the answers

According to UK guidelines, why are lead aprons not deemed essential in dental radiography?

The doses from scatter radiation outside the primary beam are negligible. Signup and view all the answers