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RAD 370 Final study guide with Questions and Answers| Latest Update
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RAD 370 Final study guide with Questions and Answers| Latest Update
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RAD 370 Final study guide with Questions andAnswers| Latest Update
The nyquist theorem - ✔✔when sampling a signal such as the conversion from an analog to a
digital image, the sampling frequency must be greater than twice the bandwidth of the input
signal so that the reconstruction of the original image will be nearly perfect
CR acquires an image through - ✔✔The use of a storage phosphor plate
A PACS consists of - ✔✔Image acquisition, display workstation, archive servers
How often should the luminescence of a monitor be checked - ✔✔daily
Image quality - ✔✔Determined by the image resolution (pixels per inch) the higher the
resolution, the larger the picture can be printed without pixelization
Contrast resolution - ✔✔the ability to differentiate one shade of gray from another
Spatial resolution - ✔✔The ability to demonstrate/identify small detail
When specialized pixels in a complementary metal oxide silicon system are struck with x-ray
photons - ✔✔Converted into light
Light photons are stored in capacitors
Light photons are converted into electrical charge
NOT all the above
, The number of bits per pixel is known as bit - ✔✔depth
HIPAA - ✔✔The Health Insurance Portability and Accountability Act, a federal law protecting
the privacy of patient-specific health care information and providing the patient with control
over how this information is used and distributed.
DICOM - ✔✔digital imaging and communications in medicine; it is a global information
technology standard that allows network communication between a modality and a PACS.
HL-7 - ✔✔The standard that oversees most computerized clinical and administrative data is
known as _______.
Each square in a matrix is called a: - ✔✔pixel or picture element
A histogram displays the useful signal by locating - ✔✔Maximum and minimum signal
High-pass filtering - ✔✔technique for the enhancement of contrast and edge that amplifies
the frequencies of areas of interest that are known (those frequencies that can be amplified)
and suppresses frequencies outside the area of interest
Low-pass filtering - ✔✔Result of averaging each pixel's frequency with surrounding pixel
values to remove high-frequency noise; the result is a reduction of noise and contrast; useful
for viewing small structures such as fine bone.
Used to describe the reading of images outside of the hospital walls, generally at home or in
remote locations? - ✔✔Teleradiology
Any computer that a health care worker uses to view a digital image is a(n): - ✔✔Display
workstation
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