05 digital radiology Flashcards
what are the advantages of digital rads?
- reduction in radiation exposure
- speed
- image manipulation and enhancement
- electronic record
- electronic transmission of images
- ease of viewing
- eliminate darkroom tom-fool-a-rie
what are some of the disadvantages of digital?
- cost
- sensor dimensions, cords
- infection control
- lack of standardization
- medicolegal
What are the two types of digital systems?
- Electronic sensors: direct
- Photostimulable phosphor (PSP) plates: semidirect
what are some of the direct electronic sensor brands?
- Schick
- Kodak RVG
- Gendex
- Dexis (4 beveled corners,= more comfort, less image area)
direct sensor concerns…
- Special sensor holders with XCP type design
- Size
- dexis beveled corners
- sensor sheath
- positioning
- can’t capture D of canine and M of 1 PM on BW and PA
what are the advantages of sensors over PSP?
- near instantaneous image
- while sensor is still in place, can make slight adjustments to improve image
how do PSP plates work?
- plates are irradiated producing latent image in phophor crystals
- image is scanned by laser beam and transferred to photomultiplier device
- plates need to be erased
advantages of PSP over sensors
- accurate positioning in all areas of mouth
- durability
- wider selection of sizes
- flexibility
- lower replacement costs
- COMFORT
examples of PSP systems
- Gendex DenOptix
- A/T ScanX
- Soredex OpTime
What PSP system is used at the school?
Soredex OpTime
- thin, flexible sensor
- plates autoerased
- 4.3 second image display
what is the “best” solution to digital?
Use a hybrid
-sensors for speed, and PSP for those portions which cannot be imaged accurately with sensors
what is the resolution limit of the naked eye?
about 11 line pair/mm
DICOM conformity
-universal recognition of file formats
