Flashcards in Radiology module 10 Deck (25):
Gray scale resolution is ---- with digital film?
It has ----- shades of gray compared to normal films ---- shades of gray?
Patient exposure to x-rays is --- to
--- % lower with digital x-rays
Resolution on digital film is
----lp/mm compared to ---- lp/mm on conventional film
The two types of digital imaging are?
Direct digital is wired to a computer with either a --- or----
CCD charged coupling device
CMOS complementary metal-oxide semiconductor
The Two types of indirect digital systems are?
Storage phosphor plate
The indirect digital phosphor system uses a --- and ---- to get images onto a computer
PPP or PSP
(photo-stimulable phosphor plate)
Laser beam scanner
Indirect digital (scanning) is ---- to direct digital because?
It is a "copy" of an original image
Indirect phosphor offers -- size of film
What are the 5 basic elements needed to take a digital x-ray?
Sensor or detector
Analogue to digital converter
Digital sensors are --- sensitive to x-rays than conventional film?
(Do you need more/less radiation?)
An ---- image is captured by the digital sensor and then converted into ---- that can be stored on the computer
Electronic pieces of data (digital)
Traditional film has --- --- in the emulsion that produce the image.
Digital sensors have ----
The silver halide crystals are arranged in what manner on the emulsion?
In digital sensors the pixels are arranged how?
Each has a specific spot
Each pixel has a --- --- representing the --- penetration of the object!
Your eyes can only see --- out of the 256 shades of gray on digital images
Digital imaging requires --- impulses vs --- impulses for a normal film
Most people feel like digital images do not equal film in regards to --- and ---
Exposure time for digital is approx. --- of conventional film
Ie --- impulses
3 (3/60 or .05 second)
A pixel is a --- ---
A specific spot on the sensor
When an x-ray photon hits the pixel it is ---- ---.
When the pixel is electronically charged it is done in proportion to what?
The number of electrons that react with that particular pixel
(electron potential well)
Major digital image software manufacturers have a built in --- --- to signal when an image has been altered