Digital Imaging and Image Manipulation

Question 1

Do film or PSP have less radiation doses?

Answer 1

PSP

Question 2

Do PSP or CCD have less radiation doses?

Answer 2

CCD

Question 3

Mathematical manipulation of image data

Answer 3

image processing

Question 4

–affects image file size in memory storage

• useful for storage issues eg. “zipping” files
• actual file size is larger that stored file size
• compression is an algorithm that can shrink the file size for storage and recreate the data when retrieving the data

Answer 4

Compression

Question 5

The number of colors that a pixel is able to show

Answer 5

Bit depth

Question 6

What are the 3 ways file memory size can become large?

Answer 6

Size of grid (Sensor size)
Number of images
Bit depth

Question 7

➢Edge Enhancement –sharpening filter
➢Noise Reduction –softening filter
➢Optimization of density/contrast
➢Inversion of gray scale
➢Magnification
➢Emboss function
➢Pseudocolor enhancement

Answer 7

Imaging Manipulation

Question 8

To be able ______ an image, the computer will change density values to predetermined numbers which then changes the image’s presentation i.e., lighter darker, etc.
Are post post-display mathematical algorithms that manipulate the digital signal

Answer 8

Manipulate

Question 9

Post-display mathematical algorithms that manipulate the digital signal

Answer 9

Imaging manipulations

Question 10

Do imaging manipulations increase diagnostic accuracy?

Answer 10

No

Question 11

Remove low-frequency noise; increases image contrast Exaggerate the contrast difference between adjacent pixels; to increase contrast, all pixel values are stretched; the dark shades become darker and the light shades become lighter
Enhances local contrast and makes edges sharper to diagnose caries, restoration fit, and fractures
simulates disease;
-Diagnostically dangerous

Answer 11

Sharpening filter - Edge Enhancement

Question 12

Enlarge a specific area till the biggest detail

-Blurs edges

Answer 12

Magnification

Question 13

Applies a three dimensional effect to the imageCould be useful in presentation situations

Answer 13

Emboss

Question 14

• Length (in MiPACS viewer)
• Angles
• Bone Density
• Area
• Circumference

Answer 14

Automated image analysis

Question 15

Data is utilized by other software programs and produces different image presentations

Answer 15

Image reconstruction