CBET Diagnostic Imaging Equipment 5

Question 1

What is the function of the Bucky grid in radiographic imaging?

Accepted Answer

Move the grid during exposure to blur grid lines while absorbing scatter

Answer

Focus the X-ray beam onto the detector

Answer

Amplify the X-ray signal at the detector

Answer

Provide filtration to remove low-energy photons

Question 2

In nuclear medicine, the term 'half-life' as applied to a radiopharmaceutical refers to:

Accepted Answer

Time for radioactive decay to reduce activity to half its initial value

Answer

Time for 50% of injected activity to be excreted by the kidneys

Answer

Duration of the imaging window after injection

Answer

Time required to synthesize the radiopharmaceutical

Question 3

A DICOM workstation cannot retrieve images from the PACS server. After confirming network connectivity, the BMET should verify:

Accepted Answer

AE Title, IP address, and port configuration for both nodes

Answer

Monitor calibration with a photometer

Answer

JPEG compression level settings

Answer

Hard disk RAID redundancy status

Question 4

Which MRI safety zone requires strict ferromagnetic screening of all personnel and equipment?

Accepted Answer

Zone IV

Answer

Zone I

Answer

Zone II

Answer

Zone III

Question 5

On a mammography unit, the automatic exposure control (AEC) sensor is placed:

Accepted Answer

Behind the image receptor, in the beam exit path

Answer

Between the X-ray tube and the breast

Answer

Inside the compression paddle

Answer

Adjacent to the collimator assembly

Question 6

During ultrasound transducer acceptance testing, a BMET uses a tissue-equivalent phantom to assess:

Accepted Answer

Dead elements, sensitivity uniformity, and depth penetration

Answer

Electrical leakage current of the transducer cable

Answer

Maximum output voltage of the pulser circuit

Answer

Doppler shift accuracy only

Question 7

The half-value layer (HVL) of an X-ray beam is used to characterize:

Accepted Answer

The beam quality (effective energy) based on its penetrating ability

Answer

The focal spot size of the X-ray tube

Answer

The patient entrance dose for a standard projection

Answer

The maximum kVp achievable by the generator