| Question |
Answer |
| Indirect DR |
two part process, photons are converted to light and light to digital signal |
| Direct DR |
incoming x-ray photons are converted to an electric signal |
| What is the base layer of the PSP? |
support layer |
| Conductor layer of the PSP does what? |
ground the plate and absorb light |
| The light shield layer of the PSP does what? |
prevents light from erasing data or decreasing spatial resolution |
| Is there an image intensifier in CR? |
no |
| Where do x-ray photons interact with CR? |
the PSP |
| How quickly is an image lost with CR? |
a latent image will loose 25% of its energy in 12 hours |
| How is resolution controlled in processing with CR? |
by the laser size |
| LUT |
look up table, pre-existing histogram for a specific body part |
| Kodak exposure index range: |
1,800-2,000 |
| Fuji S number range: |
150-250 |
| Agfa relative exposure value range: |
1.9-2.2 |
| What is the useful range for the D log E curve? |
.25-2.5 |
| Factors that produce low contrast with CR |
high kVp, no grid, poor PBL, inc. part thickness |
| What is an advantage of full-field digital mammography? |
improved contrast resolution |
Poultry
