DMS 216 Chapter 15 Study Guide

smallest amount of computer memory

number of picture elements per inch

modern flat panel monitors are desirable as displays because they:

storage of the image information in the scan converter

____ numbers are associated with computer devices and have only discrete values

the ____, or image detail, of an analog scan converter is excellent because of the large number of storage elements within the matrix

real world number that are found in our everyday lives

analog?

low pixel density produces ____

a group of bits and is simply a series of zeroes and ones

translating image information from the real world to the computer world and back again is a ____ step process

with ____ the sonographer can improve visualization of anatomic detail by enlarging a portion of the image to fill the entire screen

creates very long sound pulses containing a wide range of frequencies

a method of using sonographic information from several different angles to produce a single image is known as

with ____ the reflected signal is divided into sub-bands of limited frequencies, and an image is created from each sub-band

the goal of ____ is to fill in gaps of missing data in a way that cannot be detected by the observer

a method that works by increasing the contrast in the area immediately around the edge is know as

describes the digital ultrasound laboratory in which images and additional medical information are digitized and stored on a large computer network

PACS?

wavelength

units for wavelength

superimposes the current frame on previous frames to create a smoother image

how many gray shades can be represented by a group of 4 bits?

____ wavelengths produce higher quality images

longer

a dynamic technique that produces images from sound reflections in an entirely new way

assures that all current imaging modalities communicate, and that all devices developed in the future will easily attach to the network

____ and spatial compounding are similar in that all of the images are from the same view

persistence

coded excitation was developed with the context of:

rescans the region of interest and creates a new image with increased spatial resolution

a ____ of computer memory consists of two bytes, or 16 bits

more detail and improved spatial resolution are associated with?