Questions and Answers 100% Pass
In medical imaging, what are two types of images: - ✔✔analog and digital.
Analog images are those types of images that are... - ✔✔very familiar to us, such as
paintings and printed photographs. What we are seeing in these images are the various
levels of brightness and colors; the images are continuous; that is, they are not broken
into their individual pieces.
Digital images are recorded as... - ✔✔multiple numeric values and are divided into an
array of small elements that can be processed in many different ways.
What is digitizing a signal from a digital radiographic unit? - ✔✔assigning a numerical
value to each signal point, either an electrical impulse or a light photon.
how do humans experience the world? - ✔✔through analog vision.
humans see our surroundings as.... - ✔✔infinitely smooth gradients of shapes and
colors. Analog refers to a device or system that captures or measures a continuously
changing signal. In other works, the analog signal wave is recorded or used in its
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, original form. A typical analog device is a watch in which the hands move continuously
around the face and is capable of indicating every possible time of day. In contrast, a
digital clock is capable of representing only a finite number of times (every tenth of a
second, for example).
Traditionally, radiographic images were formed in an ____ fashion. - ✔✔analog
In an analog system such as film/screen radiography, x-ray energy is converted to... -
✔✔light, and the light waves are recorded just as they are.
In digital radiography, analog signals are converted into... - ✔✔numbers that are
recorded.
Digital images are formed through... - ✔✔multiple samplings of the signal rather than
the one single exposure of an analog image.
A digital image begins as an... - ✔✔analog signal.
The critical characteristics of a digital image are... - ✔✔spatial resolution, contrast
resolution, noise, and dose efficiency (of the receptor
A pixel or picture element, is the... - ✔✔smallest element in a digital image.
Spatially- - ✔✔the digital image is separated into pixels, with discrete (whole numbers
only) values.
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