DRC Quality Control & Process Improvement 3

Question 1

Which component of a quality assurance program addresses the correct positioning of the patient and beam alignment?

Accepted Answer

Technique quality control

Answer

Technique quality control encompasses patient positioning, beam alignment, exposure settings, and film/sensor placement to ensure diagnostic image quality.

Question 2

What does a 'clearance test' evaluate in automatic film processor quality control?

Accepted Answer

Whether the fixer solution adequately clears unexposed silver halide crystals

Answer

The clearance test (fix time test) confirms that the fixer solution can adequately remove unexposed silver halide from the film within the processor's cycle time.

Question 3

A digital radiograph displays random variations in pixel values across a uniform exposure field. This is most likely caused by:

Accepted Answer

Electronic noise from the detector or system

Answer

Random pixel variation across a uniform field is electronic noise, inherent to digital detectors and amplified by low-dose exposures or detector aging.

Question 4

According to NCRP guidelines, how far should the operator stand from the patient during X-ray exposure if no protective barrier is available?

Accepted Answer

At least 6 feet (1.8 meters)

Answer

NCRP recommends the operator stand at least 6 feet (1.8 meters) from the patient and outside the primary beam if no protective barrier is available.

Question 5

What is the main advantage of using a thyroid collar during dental radiography for pediatric patients?

Accepted Answer

It shields the radiosensitive thyroid gland from scatter radiation

Answer

The thyroid collar shields the thyroid gland, which is particularly radiosensitive in children, from scatter radiation during dental X-ray procedures.

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

(DRC) Dental Radiology Certification for Dental Hygienist Practice Test

DRC Quality Control & Process Improvement 3