To find the fundamental frequency when you are given the harmonic frequency.
Times by 2
With ________ Zoom, there will be limited resolution in the quality of the image.
READ Zoom
Pixels become enlarged and cause blurring during use of which type of zoom?
READ zoom
Which type of magnification increases the number of pixels in the image?
WRITE magnification
When there are more pixels per inch, then there will be an increase in the pixel ______.
Density
What determines the number of gray shades that are displayed?
The cluster of bits assigned to the pixel.
More shades of grey appear on a pixel with _____ bits per pixel.
More
Time gain compensation, log compression, and write magnification are all preformed when?
Preprocessing, Postprocessing, or both.
Preprocessing
Any change after freeze frame, black/white inversion, read magnification and contrast variation are all performed when?
Preprocessing, Postprocessing, or both.
Postprocessing
Persistence, frame averaging, edge enhancement, smoothing, and fill-in interpolation are all performed when?
Preprocessing, postprocessing, or both.
Either Pre or Postprocessing.
READ magnification would be performed when?
Pre, postprocessing, or both.
Both
The smallest building block of a digital picture?
Pixel
Where is ultrasound information stored when you freeze an image?
The scan converter’s memory
This allows the sonographer to freeze an image and scroll back through it.
Cineloop
What does DICOM stand for?
Digital Imaging and Communications in Medicine.
Combines ultrasound data from multiple viewing angles to produce a single, improved picture.
Spatial compounding
Divides the transmitted ultrasound pulse’s bandwidth into sub-bands, creating separate images that are then combined. Helps to reduce artifacts and noise.
Frequency compounding
Utilizes the grayscale levels of adjacent pixels to predict missing information, resulting in a smoother image. Used to bridge gaps between scan lines.
Fill-in interpolation
Improves image quality by enhancing the signal-to noise ratio without compromising spatial resolution.
Coded excitation
This process averages information from previous frames with the current frame, reducing speckle and noise and improving contrast resolution, although it can reduce temporal resolution and create motion artifacts.
Temporal compounding
What is CRT?
Cathode ray tube
What does PACS stand for?
Picture Archiving and Communication System
Creation of an image from sound reflections at twice the Fundamental frequency of the transmitted sound
Harmonic imaging
Translates information from the spoken format into the video format.
Scan converter
