Module 2 - Self test

How does the matrix size affect the clarity of digital images?

Larger matrix sizes increase clarity by reducing pixel size, enhancing image detail.

What determines the spatial resolution in a digital radiography (DR) system

Size and arrangement of Detector Elements (DELs)

What is the function of a Photomultiplier tube in the CR (Computed Radiography) imaging process?

To display the brightness level on the monitor

What is the main function of Lookup Tables (LUTs) in radiographic imaging software?

To provide standards such as S_min, S_avg, and S_max for image histogram comparison and rescaling.

What is the resulting EXI when the mAs is set to 60 in the Siemens YSIO DR system for a second exposure? First exposure was 15 mAs and had a EXI of 67. Pick best answer: 375, 250, 500

250 (because 60mAs is 4x the exposure (15mAs) therefore 67×4 = 268 

How does altering the exposure intensity impact the EXI value in a Siemens DR system?

Doubling the exposure doubles the EXI (linear relationship)

What is the impact on the Deviation Index (DI) when there is a 25% increase in the exposure intensity used for imaging?

DI increases by +1 for every 25% +1 and -1 for every 20% reduction