TFT, CCD, CMOS review UPDATED
ACTUAL Exam Questions and CORRECT
Answers
A _____ absorbs x-rays and produces electrical charges - CORRECT ANSWER -
Photoconductor
The choice of x-ray absorption material determines whether the detector is a direct or indirect
_______ system. - CORRECT ANSWER - Conversion
____ _______ is the ratio of the sensitive are of the TFT array to the entire detector area. -
CORRECT ANSWER - Fill Factor
A process known as gain calibration of _______ _________ corrects flaws in the detector, such
as dead pixels. - CORRECT ANSWER - Flat fielding
Manfufacturers make efforts to maintain a standard of less than _____ to ______ percent
defective pixels. - CORRECT ANSWER - 0.1%: 0.2%
The term image ______ TFT's is similar to double exposure with CR or film screen. -
CORRECT ANSWER - Lag
A system that uses scintillators that convert x-rays to light, light to electric charge, and store the
charge in capacitors is known as a _________ _______ ________. - CORRECT
ANSWER - charge couple device
A system where each pixel or DEL has its own transistor, amplifier, digitization circuit, etc. is
called a _________ __________ _________ _____________. - CORRECT ANSWER -
complimentary metal oxide semiconductor
ACTUAL Exam Questions and CORRECT
Answers
A _____ absorbs x-rays and produces electrical charges - CORRECT ANSWER -
Photoconductor
The choice of x-ray absorption material determines whether the detector is a direct or indirect
_______ system. - CORRECT ANSWER - Conversion
____ _______ is the ratio of the sensitive are of the TFT array to the entire detector area. -
CORRECT ANSWER - Fill Factor
A process known as gain calibration of _______ _________ corrects flaws in the detector, such
as dead pixels. - CORRECT ANSWER - Flat fielding
Manfufacturers make efforts to maintain a standard of less than _____ to ______ percent
defective pixels. - CORRECT ANSWER - 0.1%: 0.2%
The term image ______ TFT's is similar to double exposure with CR or film screen. -
CORRECT ANSWER - Lag
A system that uses scintillators that convert x-rays to light, light to electric charge, and store the
charge in capacitors is known as a _________ _______ ________. - CORRECT
ANSWER - charge couple device
A system where each pixel or DEL has its own transistor, amplifier, digitization circuit, etc. is
called a _________ __________ _________ _____________. - CORRECT ANSWER -
complimentary metal oxide semiconductor
