What term refers to a single detector element in a digital radiography receptor?

What term refers to a single detector element in a digital radiography receptor?

• A. dexel
• B. pixel
• C. voxel
• D. PSP

Answer: (A)

Dexel refers to a single detector element in a digital radiography receptor. In flat-panel DR detectors, the sensing area is made up of many tiny detector elements arranged in a grid, and each of these physical elements is called a dexel. Each dexel converts incoming x-ray energy into an electronic signal and, through the readout circuitry, contributes one value to the final digital image. The collection of all dexels determines the image resolution, since more dexels across and down mean finer detail. In the displayed image, the element that you see as a single picture element is a pixel, which is a data representation, not the physical detector unit. A voxel is a three-dimensional volume element used in volumetric imaging like CT, not a single detector element in a flat-receptor DR system. PSP refers to the imaging plate used in computed radiography, which is a different technology from the digital radiography receptor in question.

Dexel refers to a single detector element in a digital radiography receptor. In flat-panel DR detectors, the sensing area is made up of many tiny detector elements arranged in a grid, and each of these physical elements is called a dexel. Each dexel converts incoming x-ray energy into an electronic signal and, through the readout circuitry, contributes one value to the final digital image. The collection of all dexels determines the image resolution, since more dexels across and down mean finer detail.

In the displayed image, the element that you see as a single picture element is a pixel, which is a data representation, not the physical detector unit. A voxel is a three-dimensional volume element used in volumetric imaging like CT, not a single detector element in a flat-receptor DR system. PSP refers to the imaging plate used in computed radiography, which is a different technology from the digital radiography receptor in question.