Exam 5: Flat-Panel Digital Radiography

The flat-panel TFT digital detector uses complex and sophisticated electronic circuitry to read out the electrical charges produced and stored in the matrix array.

The flat-panel TFT digital detector is designed as a matrix of detector elements, each of which can be regarded as a(n) ____________________.

At ____ kV, efficiencies are 37% for a-Se and 52% for CsI.

Which of the following images is obtained initially from the detector and contains artifacts due to the bad detector elements?

Which of the following plays a role in image display optimization?

Which layer used in the indirect flat-panel digital detector is usually either cesium iodide (CsI) or gradolinium oxysulfide (Gd₂O₂S)?

Too much edge enhancement produces image noise and creates ____.

Flaws in the various components that make up a panel can lead to image lag.

Image processing is not intended to correct poor images due to routine errors that are made during image ____________________.

The narrower the LSF, the better the ____________________ resolution.

The ____________________ technology was developed as a dedicated system specifically for imaging the chest.

Problems arising as a result of image ____________________ may also be related to the differences in the acquisition workstation and the higher-quality PACS workstation used by the radiologist.

Flat-panel detectors can be used in portable radiography applications and in applications involving ____________________.

A higher MTF value at ____________________ spatial frequencies means that the detector provides better contrast resolution.

Which concept examines the response of the image receptor (screen-film detector or digital detector) to the radiation falling upon it?

Which of the following describes the ability of the imaging system to resolve fine details present in an object?

Which of the following reduces the output image from the scintillator phosphor to the size of the CCD array?

The raw digital data from a detector has a high image contrast simply because of the wide exposure latitude of the digital detector.

While the low frequencies contain fine details of the image, high frequencies contain the contrast information in the image.

Which of the following addresses the appearance of the image displayed on a monitor for viewing and interpretation by a radiologist?