RADT EXAM 2026 FINAL REVIEW EXAM
◉ remnant radiation. Answer: all radiation detected by the receptor:
consist of primary beam, scatter and secondary radiation
◉ only radiation that is of clinical value to us in medicine is what?.
Answer: remnant radiation is all radiation detected by receptor
◉ DR (indirect or direct). Answer: called flat panel detectors, both
use thin film transistor (TFT) technology for electronic readout of
the signal created from x-ray exposure. provides a lower dose,
quicker image presentation, and improved spatial resolution.
battery-charged panels; can be wireless or hardware (tether).
◉ hard copy. Answer: images printed on paper or film
◉ soft copy. Answer: images acquired digitally and stored
electronically
◉ which radiography technology uses lower dose, quicker image,
presentation and improved spatial resolution?. Answer: DR
,◉ DEL. Answer: captures energy from x-ray exposure and creates
electrical charge proportional to intensity of x-ray exposure; on
receptor
◉ charge is analog converter to.... Answer: signal value then sent to
computer for process using algorithms (look up table and DEL
valued here)
◉ pixels in on. Answer: on monitor; dots that make up an image
◉ DR detectors are sensitive to what?. Answer: mechanical shock
and fluid invasion
◉ bit depth. Answer: The number of bits used to encode each
sample during digitization.
(low= less shades)
(high= more shades)
◉ fluoroscopy is increasingly being used for. Answer: Placement of
tubes, catheter and vascular lines
◉ R/F systems. Answer: radiography and fluoroscopy; fluoroscopic
x-ray tube can be above or below the patient.
, xray tube below the patient, releases scatter below the table and to
the operator's legs. xray tube above the patient, releases scatter
above the table that would be directed to waist level and higher to
the operator (most scatter is ESE)
◉ True digital image receptors are referred to as. Answer: flat panel
detectors
◉ in fluoroscopic system, the surface/face of the fluoroscopy
detector is considered the..... Answer: primary barrier to the x ray
beam and fluoroscopic exposure are allowed only when fluoroscopic
x ray tube and IR are locked and "centered" in place
◉ fluoroscopic drape. Answer: **extremely effective barrier for
reducing radiation exposure to the radiologist and technologist and
procedures, and should remain in position during fluoroscopy;
hanging from front of the fluoroscopic carriage is a removable lead
apron/drape
◉ flat panel fluoroscopic detectors use. Answer: sophisticated digital
amorphous silicon (a-Si) flat panel detector in a fluoroscopic
carriage above the patient, replacing the conventional "tower"
design
, ◉ during fluoroscopy, the fluoroscopic tower is locked into position
with a fluoroscopic x ray tube so that both are what?. Answer:
centered to each other.
◉ all r/f systems provide what?. Answer: last image hold (LIH)
function, which freezes the last video image on the monitor for
detailed study by the viewer. This is a stored image, not a live image,
so no additional does to the patient.
◉ Complete fluoroscopic system contains. Answer: r/f table, IR, x-
ray generator and control, ceiling mount, x-ray tube, and video
display monitor
◉ dose modulation. Answer: permit adjustable exposure in real time
to optimize image quality at ALARA dosages
◉ digital tomosynthesis. Answer: potentially for chest lesions in
breast disease. A radiographic procedure that acquires as many as
60 low-dose projection images during a single x-ray tube sweep of
the patient. when "sweeping" that is when the radiograph machine
is taking slices of the patient. Produces about 3 to 6 images.
◉ dual energy subtraction radiography. Answer: improve the
diagnostic value of an X-ray by separating soft tissue from bones,
producing two different images. DR detectors work with high-
◉ remnant radiation. Answer: all radiation detected by the receptor:
consist of primary beam, scatter and secondary radiation
◉ only radiation that is of clinical value to us in medicine is what?.
Answer: remnant radiation is all radiation detected by receptor
◉ DR (indirect or direct). Answer: called flat panel detectors, both
use thin film transistor (TFT) technology for electronic readout of
the signal created from x-ray exposure. provides a lower dose,
quicker image presentation, and improved spatial resolution.
battery-charged panels; can be wireless or hardware (tether).
◉ hard copy. Answer: images printed on paper or film
◉ soft copy. Answer: images acquired digitally and stored
electronically
◉ which radiography technology uses lower dose, quicker image,
presentation and improved spatial resolution?. Answer: DR
,◉ DEL. Answer: captures energy from x-ray exposure and creates
electrical charge proportional to intensity of x-ray exposure; on
receptor
◉ charge is analog converter to.... Answer: signal value then sent to
computer for process using algorithms (look up table and DEL
valued here)
◉ pixels in on. Answer: on monitor; dots that make up an image
◉ DR detectors are sensitive to what?. Answer: mechanical shock
and fluid invasion
◉ bit depth. Answer: The number of bits used to encode each
sample during digitization.
(low= less shades)
(high= more shades)
◉ fluoroscopy is increasingly being used for. Answer: Placement of
tubes, catheter and vascular lines
◉ R/F systems. Answer: radiography and fluoroscopy; fluoroscopic
x-ray tube can be above or below the patient.
, xray tube below the patient, releases scatter below the table and to
the operator's legs. xray tube above the patient, releases scatter
above the table that would be directed to waist level and higher to
the operator (most scatter is ESE)
◉ True digital image receptors are referred to as. Answer: flat panel
detectors
◉ in fluoroscopic system, the surface/face of the fluoroscopy
detector is considered the..... Answer: primary barrier to the x ray
beam and fluoroscopic exposure are allowed only when fluoroscopic
x ray tube and IR are locked and "centered" in place
◉ fluoroscopic drape. Answer: **extremely effective barrier for
reducing radiation exposure to the radiologist and technologist and
procedures, and should remain in position during fluoroscopy;
hanging from front of the fluoroscopic carriage is a removable lead
apron/drape
◉ flat panel fluoroscopic detectors use. Answer: sophisticated digital
amorphous silicon (a-Si) flat panel detector in a fluoroscopic
carriage above the patient, replacing the conventional "tower"
design
, ◉ during fluoroscopy, the fluoroscopic tower is locked into position
with a fluoroscopic x ray tube so that both are what?. Answer:
centered to each other.
◉ all r/f systems provide what?. Answer: last image hold (LIH)
function, which freezes the last video image on the monitor for
detailed study by the viewer. This is a stored image, not a live image,
so no additional does to the patient.
◉ Complete fluoroscopic system contains. Answer: r/f table, IR, x-
ray generator and control, ceiling mount, x-ray tube, and video
display monitor
◉ dose modulation. Answer: permit adjustable exposure in real time
to optimize image quality at ALARA dosages
◉ digital tomosynthesis. Answer: potentially for chest lesions in
breast disease. A radiographic procedure that acquires as many as
60 low-dose projection images during a single x-ray tube sweep of
the patient. when "sweeping" that is when the radiograph machine
is taking slices of the patient. Produces about 3 to 6 images.
◉ dual energy subtraction radiography. Answer: improve the
diagnostic value of an X-ray by separating soft tissue from bones,
producing two different images. DR detectors work with high-
