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Digital Imaging A Test

Enter the letter for the matching Answer
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1.
a phosphor used in computed radiography (CR)plates to absorb the x-ray energy and store it until it is processed by a special unit and laser light
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2.
measure of x-ray absorption efficiency; variation in detectors which predicts their efficiency; absorption coefficient;
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3.
one of the two types of digital imaging systems that is cassette based, the body part is obtained using storage phosphor in the cassette
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4.
an extensive networked group of computers, services and archives the image
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5.
the ability if an imaging system to resolve and render on the image a small high contrast object; determined primarily by the number of pixels in an image & therefore the size of each pixel
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6.
range of exposures over which a detector can acquire image data and display contrast comparable to film latitude; the number of gray shades that an imaging system can reproduce.
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7.
smallest exposure change (signal) difference that can be captured by a detector controlled by the dynamic range of the detector and quantization
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8.
one of the two types of digital imaging systems; is cassetteless. The phosphor is bonded to a flat panel detector built into the x-ray table or chest board
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9.
determines the gray scale rendition of that tissue & therefore the image contrast
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10.
the dimensions of the field of view (fov) with in patients body not the size of displayed image
A.
Picture archival and communication system (PACS)
B.
Spatial resolution (digital) –
C.
Digital radiography (DR)
D.
Photostimulable phosphor
E.
Dynamic range (digital receptors)
F.
Computed radiography
G.
Contrast resolution (digital)
H.
DQE Detector Quantum Efficiency
I.
Window width – (contrast)
J.
Image size (digital)
Type the Answer that corresponds to the displayed Question.
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11.
image comprised of continuous shades of gray from black to white
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12.
the further adjusting of any image of a body part with the use of computer software
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13.
detectors convert the x-ray energy directly to an electric signal through an amorphous selenium detector
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14.
an array of small picture elements (pixels) that forms a matrix; each pixel is recorded
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15.
an option of post processing to improve the film
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16.
the process of acquiring images of the body using x-rays displaying them digitally, viewing and storing them on a computer complete file
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17.
a two-step process in which the x-ray energy is first converted to light & then converted into electrical signal using a scintillator
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18.
a part of windowing that adjusts the brightness; it identifies the type of tissue to be in focus (soft tissue or bone)
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19.
a device that glows when hit by the high-energy x-ray photons and often is made of cesium iodide
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20.
relates the number of line pairs in a given length as cm or mm (lp/mm); data is sampled from an exposed detector in computed radiography/detector element-size (del)

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