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image processing
Question | Answer |
---|---|
Which component of the digital image corresponds to contrast on the radiographic image? | Window width |
When the image matrix size is increased, resulting in a decreased pixel size, what happens to spatial resolution? | It increases |
Which of the following is normally unique to DR? | Fast image access |
Which of the following is used as an image receptor in DR? | Se |
With digital imaging, using twice the needed mAs will result in an image with _____ density/brightness and _____ patient exposure | Appropriate, excessive |
What is the display of the digital image that occurs in a series of rows and columns called? | Matrix |
How can you describe a noisy image? | An image with noticeable quantum mottle |
A digital image constructed on 512 x 512 matrix will have how many pixels? | 262144 |
The pixel bit depth determines the amount of shades of gray the system is capable of displaying on the digital image. | True |
DR imaging systems briefly store the electrical charge in the: | TFT |
In digital radiography or fluoroscopy, the image should be viewed on what device to take advantage of the digital capabilities? | High resolution monitor |
Which component of the digital image corresponds to contrast on the radiographic image? | Window width |
In CR and DR, each pixel corresponds to a shade of gray representing a volume in the patient known as a: | Voxel |
What is the display of the digital image that occurs in a series of rows and columns called? | Matrix |
THe mathematical formula used to reconstruct the image in digital imaging is called | An algorithm |
The window level in CR or DR is the | The midpoint of densities |
A graphic display that is constructed to show the radiographer the distribution of pixel values is called | A histogram |
Image brightness in CR and DR may be adjusted by | Changing the window level |
Picture elements in a digital image are called | Pixels |
In computed radiography, the image must be turned into digital form by what device? | The analog to digital converter |