Radiographic Exposures Flashcards
Radiographic image obtained through continuous scanning by a light source transmitted through an image onto a photomultiplier tube that generates an analog output signal.
analog image
Computer processing of digital data into a numerical representation of the patient that must be converted to an analog image.
digital processing
Numerical representation of computer processing of digital data.
digital image
Domain in which the X-Y coordinate (right-handed) explains an image.
Spatial location domain
Domain in which images are acquired and described according to the wavelength of the signal used to acquire the image.
Spatial frequency domain
Generate an image that is more pleasing to the observer.
image enhancement
Improve quality of images that have distortions or degradations.
image restoration
Allow measurements and statistics to be performed; image segmentation, feature extraction, classification of objects.
image analysis
Reduce the size of the image in order to decrease transmission time and reduce image storage space.
image compression
“create images from other images from other images,” or non-image data.
image synthesis
A two-dimensional array of numbers that makes up a digital image.
Matrix
(picture element) small square regions in an image matrix containing a discrete value that represents a brightness level reflecting the tissue characteristics being imaged.
pixel
(volume element) the information contained in a volume of tissue that is converted into numerical values expressed in pixels.
Voxel
Number of bits per pixel.
Bit depth
Matrix, pixel, Voxel , and Bit depth are the major features of_?
digital image characteristics
