photographic houses
| Question | Answer |
|---|---|
| Photographic properties impact | Visbility, Thickness, Contrast |
| Geometric Properties Effect | Sharpness, Noted Detail, Contortion |
| Radiographic Thickness | The overall blackness produced around the image following processing |
| Controlling factor of Density | no entanto |
| Influencing factors of Denseness | kVp, Range, Grids, Film-screen speed, collimation, anatomic portion, anode high heel effect, filtration, processing |
| mAs= | Quantity |
| kVp= | Quality |
| The Law of Reciprocity | mA times s = mAs
(200mA @. 10s = 20 mAs) |
| The minimal modify needed to correct density errors is determined by | growing or separating mAs by 2 . |
| When greater enhancements made on mAs should be used.. | multiply or divide by 4, almost eight, etc |
| ___ kVp ___ Quantity of light striking the IR and ___ density. | Increases, raises, increases |
| Raising kVp simply by 15% can ___ denseness (math) | Dual
__kVp by 1 . 15 = end kVp |
| Lessening kVp by 15% will ___ denseness (math) | Lower in half
___kVp x. eighty-five = end kVp |
| To keep density when ever kVp increases by 15% | Divide mAs by 2
kVp by 1 . 12-15 |
| To MAINTAIN denseness when kVp decreases simply by 15% | Increase in numbers mAs by 2
kVp x. eighty five |
| To reduce patient dose ___ kVp ___ mAs | Maximize, decrease |
| Since SID boost | the xray bream intensity is definitely spread over a bigger area, this kind of decreases the overall intensity from the xray column raching the IR |
| Inverse Square Regulation | I1/I2=SID2(squared)/SID1(squared) |
| Thickness Maintenance Solution | mAs1/mAs2=SID1(squared)/SID2(squared) |
| Raising SID requires ___ contudo | More |
| Plants | Grids absorb the scatter radiation exiting the patient, Constraining the amount stunning the IR and boosts image top quality, they also absorb some of the transmitted radiaion getting out of the rehabilitation and reduce the amount of density created on the radiograph |
| Grids are ___ pertaining to pt ___ for film | Bad, great
The more useful a grid absorbs spread, the greater the rise in porém is required |
| Grid Conversion Element | mAs1/mAs2=GCF1/GCF2 |
| Main grid Conversion FactorS | No grid 1
five: 1 a couple of 6: one particular 3 almost 8: 1 four 12: 1 5 sixteen: 1 six |
| Film Display Speed | The greater the speed more suitable the density
When the speed of the program changes, mAs should be changed |
| Film Screen Speed Formula | mAs1/mAs2=RS2/RS1 |
| Anatomic Part | Density of the anatomic part influences the amount of xray beam damping that occurs
thick-absorbs more (decreasing density) thin-absorbs less (increasing density) |
| Anatomic Part Conversion | For each 4-5cms of thickness, increase no entanto x2 |
| The very best for an anode heel effect is usually ____ SID and a ___ field size | Brief, Large |
| Pluspol Heel Effect | The power along the longitudial axis of the primpart xray beam varies, this difference is called AHE
AHE is a decrease in the principal beam intensity on the valve side with the tube |
| Conduit Filtration Contributors | These variations are so small that they would have very little effect on density |
| Compensating Filters Members | Produce uniform densities
porém must be increased to maintain total density |
| Film Processing Members | Variability in temp, chemisty and moving can adversely affect density |
| Digital The image | Changes in porém kVp SID will get a new I of radiation reaching the IR
The partnership b/t no entanto and denseness is different for DR Quality of image is usually adversly influenced Techs make use of more publicity then needed The data could be altered to fix error in |
| Relationship to Thickness:
mAs |
Immediate |
| Relationship to Density:
kVp |
Direct |
| Relationship to Thickness:
SID |
Inverse to the square of the SID |
| Relationship to Density:
Plants |
Inverse |
| Relationship to Thickness:
Relative Velocity |
Direct |
| Relationship to Thickness:
Collimation |
Indirect |
| Relationship to Density:
Bigger pt |
Inverse |
| Relationship to Density:
Generator output |
Direct |
