Chapter 25 - Bushong Fluoroscopy
The fluoroscope is used for - answerthe examination of moving internal structures and
fluids.
Angiography is used to - answer visualize vessels.
Interventional radiology includes - answer neuroradiology and vascular radiology.
ABC stands for - answer*A*utomatic *B*rightness *C*ontrol
- Brightness level maintained automatically by varying the kVp, the mA, or sometimes
both.
Brightness level is maintained automatically by - answer varying the kVp, the mA, or
sometimes both.
AERC stands for - answer*A*utomatic *E*xposure *R*ate *C*ontrol
- Maintains the radiation dose per frame at a predetermined level.
Illumination levels are measured in - answerunits of lumen per square meter or lux.
Visual Physiology - answerrods and cones are responsible for the sensation of vision
Cones are used primarily for - answerdaylight vision, also called photopic vision.
Rods are used primarily for - answernight vision, also called scotopic vision.
The influence of kVp and mA on fluoroscopic image quality is ____________ to their
influence on radiographic image quality. Generally, _______ kVp and _______ mA are
preferred. - answersimilar, high, low
Why is the fluoroscopic mA not given? - answerBecause this value varies according to
patient thickness and the response of the ABC system
IMAGE INTENSIFICATION: - answer•Input phosphor- CsI- Cesium iodide
•The photocathode emits electrons when illuminated by the input phosphor
•The output phosphor is the site where accelerated electrons interact and produce light
•Electrostatic focusing lenses, negative charge focuses the electron stream
•Multifield image intensifiers produce different magnification of the image
•25/17/12 cm trifield tubes
What is the number of output light photons over the number of input x-ray photons? -
answerFlux gain
The fluoroscope is used for - answerthe examination of moving internal structures and
fluids.
Angiography is used to - answer visualize vessels.
Interventional radiology includes - answer neuroradiology and vascular radiology.
ABC stands for - answer*A*utomatic *B*rightness *C*ontrol
- Brightness level maintained automatically by varying the kVp, the mA, or sometimes
both.
Brightness level is maintained automatically by - answer varying the kVp, the mA, or
sometimes both.
AERC stands for - answer*A*utomatic *E*xposure *R*ate *C*ontrol
- Maintains the radiation dose per frame at a predetermined level.
Illumination levels are measured in - answerunits of lumen per square meter or lux.
Visual Physiology - answerrods and cones are responsible for the sensation of vision
Cones are used primarily for - answerdaylight vision, also called photopic vision.
Rods are used primarily for - answernight vision, also called scotopic vision.
The influence of kVp and mA on fluoroscopic image quality is ____________ to their
influence on radiographic image quality. Generally, _______ kVp and _______ mA are
preferred. - answersimilar, high, low
Why is the fluoroscopic mA not given? - answerBecause this value varies according to
patient thickness and the response of the ABC system
IMAGE INTENSIFICATION: - answer•Input phosphor- CsI- Cesium iodide
•The photocathode emits electrons when illuminated by the input phosphor
•The output phosphor is the site where accelerated electrons interact and produce light
•Electrostatic focusing lenses, negative charge focuses the electron stream
•Multifield image intensifiers produce different magnification of the image
•25/17/12 cm trifield tubes
What is the number of output light photons over the number of input x-ray photons? -
answerFlux gain
