chapter 8

Question 1

for digital imaging, the more pixels,

Answer 1

sharper the image

Question 2

discernible separation of closely adjacent details of an image; measured in line pairs

Answer 2

spatial resolution

Question 3

greatest number of paired lines visible in 1 mm of an image

Answer 3

line pairs

Question 4

greater the spatial resolution,

Answer 4

the sharper an image looks

Question 5

number of shades of gray visible in an image

Answer 5

gray scale

Question 6

what machines may produce more consistent exposures at short exposure times associated with digital radiography

Answer 6

DC machines

Question 7

merges two radiographic images of same area; portions of the images that did not change will cancel each other out and are subtracted from each image; changes stand out conspicuously

Answer 7

digital subtraction

Question 8

replaces film with a photostimulable phosphor(PSP) plate; no wire connection to computer

Answer 8

indirect digital imaging

Question 9

PSP technology uses ___ plates with a storage phosphor; europium activated barium fluorohalide; captures and stores x ray energy as a latent image

Answer 9

polyester plates

Question 10

exposed PSP sensors are placed into

Answer 10

laser scanning device that is connected to computer and monitor; directs a helium-neon laser beam to pass over the PSP plate and causes the stored latent image to be released in the form of light

Question 11

scanning time; seconds for periapical radiograph and extraoral panoramic image

Answer 11

10 seconds

5 min

Question 12

PSP plates produce images with___ spatial resolution compared to solid-state sensors

Answer 12

less spatial resolution

Question 13

intraoral PSP plates closely resemble intraoral film sizes:

Answer 13

0,1,2,3,4