X-Ray Certification Quality Control 2

Question 1

What is the purpose of a sensitometric strip in radiographic quality control?

Accepted Answer

To evaluate film processor performance by assessing density and contrast

Answer

A sensitometric strip is used to monitor film processor performance by measuring base plus fog, speed, and contrast index values.

Question 2

Which parameter does the 'speed index' on a sensitometric strip primarily reflect?

Accepted Answer

The density at a specific step near the mid-density range

Answer

The speed index is the density measured at a specific mid-density step on the sensitometric strip, representing the film's sensitivity to exposure.

Question 3

What action should be taken when the base-plus-fog level of a processor QC chart exceeds control limits?

Accepted Answer

Investigate and correct the problem before processing diagnostic images

Answer

Exceeding control limits indicates a processor problem; clinical imaging must be suspended until the cause is identified and corrected.

Question 4

How often should processor quality control be performed in a high-volume radiology department?

Accepted Answer

Daily

Answer

Daily processor QC ensures consistent film development quality and allows early detection of processor drift or malfunction.

Question 5

What does a 'contrast index' value on a processor QC chart indicate?

Accepted Answer

The difference in density between two specific steps on the sensitometric strip

Answer

The contrast index reflects the difference in optical density between two defined steps, indicating the processor's ability to produce adequate image contrast.

X-Ray Certification Practice Test

X-Ray Certification Practice Test

X-Ray Certification Quality Control 2