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radt 465

image aquisition

QuestionAnswer
which IR gets image by photon hitting scintillator> light> CCD> electronic signal CCD / CMOS
negatives of what IR are low light capture, lack of transfer efficiency and spatial resolution, decreased DQE CCD/ CMOS
which IR uses uropium, barium fluorohalide phosphors, CR, workstation PSP
DQE INCREASES SO PATIENT DOSE ________ DECREASES
PHOTO> AMORPHOUS SELENIUM> SILICON> XRAY> LIGHT TFJ> LIGHT A Si> LIGHT TFT
PHOTON > PHOSPHOR LAYER> LASER RELEASES> LIGHT > NORMAL STATE> READER OF LIGHT> DIGITIZER PSP
POSITIVES: HIGH CONTRAST, LIGHT WEIGHT : ___ IR PSP
EI ________ PROPORTIONAL TO EXPOSURE OF IR DIRECTLY
S NUMBER _____- PROPORTIONAL TO EXPOSURE OF IR INVERSELY
ABILITY OF SYSTEM TO DISPLAY CHANGES IN GRAY SCALE VALUES (BIT DEPTH) CONTRAST RESOLUTION
MEASURED IN LP/ MM DETERMINED BY PIXEL SIZE SPATIAL RESOLUTION
CR USES ___________ FOR SPATIAL RESOLUTION SAMPLING FREQUENCY
DR USES _____ FOR SPATIAL RESOLUTION DETECTOR ELEMENT SIZE (DEL)
IODINE STUDIES NEED ______ KVP <80
BARIUM STUDIES USE __________ KVP 100- 125
DOUBLE CONTRAST STUDIES USE ______ KVP 90-100FA
PROCESOR TIME? 90 SEC
FILM STORAGE TEMPERATURE 50-70 DEGREES
PROCESSING TEMPERATURE 90-95 DEGREES
ARTIFACTS THAT OCCUR AFTER EXPOSURE ARE WHAT COLOR BLACK
WHEN PT THICKNESS INCREASES 1 CM WHAT ADJUSTMENT TO KV 2 KVP
PHOTON ENERGY LEVEL IS INVERSELY PROPORTIONAL TO ______ WAVELENGTH
_________ IMAGING HAS SOLID STATE DETECTOR, DIRECT CAPTURE IMAGING SYSTEM, IMMEDIATE IMAGE DISPLAY DR
A HIGH RATIO GRID WILL ABSORB MORE OR LESS SCATTER AND ABSORB MORE OR LESS PRIMARY MORE
DOES FIELD SIZE AFFECT EXPOSURE RATE NO
EXPOSURE RATE DECREASES AS ________ INCREASES SID
SCATTERED RADIATION CAUSES WHAT ON AN X RAY FOG
FACTORS THAT AFFECT CONTRAST KVP, GRIDS, FILTRATION, IMAGING SYSTEM SPEED, ANATOMY AND PATHOLOGY
CONTRAST AND KVP ARE ______ PROPORTIONAL INVERSELY
ANATOMY AND PATHOLOGY _______ PROPORTIONAL TO IMAGE CONTRAST INVERSELY
Created by: schwenk