Week 2 imaging

Question 1

What is the activator on the active layer of the PSP plate?

Answer 1

Barium Fluorohalide

Question 2

What layer of the plate send light in a forward direction?

Answer 2

Reflective

Question 3

What layer of the plate reduces static electricity?

Answer 3

Conductive

Question 4

Is the barcode label used as a patient identifier?

Answer 4

Yes

Question 5

What device on the reader detects the light being released?

Answer 5

Photo Detector

Question 6

How do you erase the plate?

Answer 6

Manually select eraser method and use bright white light.

Question 7

How often should you erase the plate?

Answer 7

at the end of every day

Question 8

Does too much mAs cause quantum mottle?

Answer 8

No

Question 9

What is a Moire pattern?

Answer 9

A wavy artifact caused by a incorrect grid alignment with laser scan direction

Question 10

What happens to a radiograph when not enough mAs was used?

Answer 10

quantum mottle

Question 11

What happens to the image if the cassette is placed backwards?

Answer 11

Artifacts

Question 12

PSP is backed by aluminum. What does the aluminum do?

Answer 12

absorbs backscatter

Question 13

What protects against dust collection and damage on imaging plate?

Answer 13

felt material

Question 14

What layer of the plate attracts electrons?

Answer 14

active layer

Question 15

What layer absorbs stimulating light but reflects emitted light?

Answer 15

color layer

Question 16

What is the function of the optical mirror?

Answer 16

Directs laser beam to laser plate

Question 17

When is a photon assigned a number?

Answer 17

Digitization

Question 18

What is the wavelength of the PSP reader?

Answer 18

633 um

Question 19

How does the laser scan the imaging plate?

Answer 19

Rastor pattern

Question 20

Term for the process of scanning the imaging plate?

Answer 20

translation

Question 21

How do you release the plate?

Answer 21

with bright light

Question 22

How does spacial resolution affect the image?

Answer 22

shows more detail

Question 23

If the wrong body part is selected, what is the result?

Answer 23

image misinterpretation

Question 24

What is the range of kVp used on PSP systems?

Answer 24

45-120

Question 25

What is the k-edge of phosphor imaging plates?

Answer 25

30-50 keV

Question 26

What does milliamperage help us select?

Answer 26

Number of photons

Question 27

If I have insufficient light, what kind of artifact will be present?

Answer 27

quantum mottle (grainy)

Question 28

The higher the number of pixels in a matrix the higher ___ ____

Answer 28

image resolution

Question 29

Why is grid use more critical on psp examinations than on film screens?

Answer 29

CR records more densities

Question 30

What is grid frequency?

Answer 30

number of grid lines per centimeter or lines per inch

Question 31

What is grid ratio?

Answer 31

The relationship between the height of the lead strips and the space between the lead strips

Question 32

What type of grid selection is critical to have the beam set on?

Answer 32

Focus

Question 33

Collimation decreases what?

Answer 33

scatter

Question 34

An indication of radiation absorbed by imaging plate?

Answer 34

exposure indicator number

Question 35

what will happen to the imaging plate if left in the reader for too long?

Answer 35

will cause cracks

Question 36

Is less kvp needed in conventional than PSP?

Answer 36

No

Question 37

Is it acceptable to replace collimation with shuttering?

Answer 37

No

Question 38

Should images be marked with computerized markers?

Answer 38

NO

Question 39

List layers of imaging plate from most superior to inferior

Answer 39

Protective layer, Phosphor layer, light reflective layer, Conductive layer, support layer, light shielding layer, backing layer, barcode label