CALIFORNIA FLUOROSCOPY SUPERVISOR AND
OPERATOR EXAM
The major reason that image intensified fluoroscopy is employed is that it allows for:
a. Dynamic viewing
b. Rapid development
c. High visual acuity
d. Low patient exposure - Answers - a. Dynamic viewing
Portable intensified fluoroscopy used for diagnostic purposes must not exceed ____ at
the tabletop:
a. 1 R/min
b. 3 R/min
c. 5 R/min
d. 10 R/min - Answers - c. 5 R/min
Which type of vision is most commonly employed during conventional fluoroscopic
exam?
a. Photopic
b. Scotopic
c. Mesopic
d. Lovotopic - Answers - a. Photopic
Visible light:
a. Is not part of the electromagnetic spectrum
b. Has higher energy than x-rays
c. Is the only part of the electromagnetic spectrum we can see
d. Has lower energy than radiowaves - Answers - c. Is the only part of the
electromagnetic spectrum we can see
Most modern image intensifiers use an input fluorescent screen layer that is composed
of:
a. Calcium tungstate
b. Cesium iodide
c. Barium lead sulfate
d. Zinc cadmium sulfide - Answers - b. Cesium iodide
The conversion of light energy into a proportional amount of electrons is accomplished
by a/an:
,a. Electron gun
b. Photomultiplier
c. Electrostatic lens
d. Photocathode - Answers - d. Photocathode
The acceleration of the electron stream inside the image intensifier requires a potential
difference (voltage) of
a. 25 volts
b. 50 volts
c. 25 kilovolts
d. 50 kilovolts - Answers - c. 25 kilovolts
The ouput screen of an image intesifier functions to convert ___ into ____ :
a. Light, electrons
b. Light, x-rays
c. Electrons, light
d. X-rays, electrons - Answers - c. Electrons, light
The target to panel and target to skin distance shall not be less than:
a. 18 in
b. 35 cm
c. 40 in
d. 12 in - Answers - d. 12 in
The squared ratio of input screen to output screen is called:
a. Minification ratio
b. Flux gain
c. Magnification ratio
d. Conversion ratio - Answers - a. Minification ratio
A 9" input screen and a 1" output screen increases brightness:
a. 9 times
b. 18 times
c. 40 times
d. 81 times - Answers - d. 81 times
The point in the image intensifier tube where the electrons cross:
a. Optical point
b. Electronic focal point
, c. Input focal point
d. Output focal point - Answers - b. Electronic focal point
As the illumination of the light source increases, visual acuity:
a. Increases
b. Decreases
c. Remains the same - Answers - a. Increases
note:
at low light = visual acuity is lowest
at bright light = visual acuity is max
The time over which the human eye can store a visual image is termed _____ time:
a. Adaptation
b. Acuity
c. Integration
d. Illumination - Answers - c. Integration
Which of the following structures if first to intercept light incident on the eye
a. Rods
b. Iris
c. Cornea
d. Cones - Answers - c. Cornea
The normal view distance for binocular vision is
a. 1-2 in
b. 4-8 in
c. 12-15 in
d. 16-20 in - Answers - c. 12-15 in
In general, during conventional fluoroscopic examinations the preferred technique is:
a. High kVp, low mA
b. High kVp, low mAs
c. Low kVp, high mAs
d. Low kVp, high mA - Answers - a. High kVp, low mA
Which of the following properties are associated with cones rather than rods:
a. Contrast perception
b. Color detection
c. Visual acuity
OPERATOR EXAM
The major reason that image intensified fluoroscopy is employed is that it allows for:
a. Dynamic viewing
b. Rapid development
c. High visual acuity
d. Low patient exposure - Answers - a. Dynamic viewing
Portable intensified fluoroscopy used for diagnostic purposes must not exceed ____ at
the tabletop:
a. 1 R/min
b. 3 R/min
c. 5 R/min
d. 10 R/min - Answers - c. 5 R/min
Which type of vision is most commonly employed during conventional fluoroscopic
exam?
a. Photopic
b. Scotopic
c. Mesopic
d. Lovotopic - Answers - a. Photopic
Visible light:
a. Is not part of the electromagnetic spectrum
b. Has higher energy than x-rays
c. Is the only part of the electromagnetic spectrum we can see
d. Has lower energy than radiowaves - Answers - c. Is the only part of the
electromagnetic spectrum we can see
Most modern image intensifiers use an input fluorescent screen layer that is composed
of:
a. Calcium tungstate
b. Cesium iodide
c. Barium lead sulfate
d. Zinc cadmium sulfide - Answers - b. Cesium iodide
The conversion of light energy into a proportional amount of electrons is accomplished
by a/an:
,a. Electron gun
b. Photomultiplier
c. Electrostatic lens
d. Photocathode - Answers - d. Photocathode
The acceleration of the electron stream inside the image intensifier requires a potential
difference (voltage) of
a. 25 volts
b. 50 volts
c. 25 kilovolts
d. 50 kilovolts - Answers - c. 25 kilovolts
The ouput screen of an image intesifier functions to convert ___ into ____ :
a. Light, electrons
b. Light, x-rays
c. Electrons, light
d. X-rays, electrons - Answers - c. Electrons, light
The target to panel and target to skin distance shall not be less than:
a. 18 in
b. 35 cm
c. 40 in
d. 12 in - Answers - d. 12 in
The squared ratio of input screen to output screen is called:
a. Minification ratio
b. Flux gain
c. Magnification ratio
d. Conversion ratio - Answers - a. Minification ratio
A 9" input screen and a 1" output screen increases brightness:
a. 9 times
b. 18 times
c. 40 times
d. 81 times - Answers - d. 81 times
The point in the image intensifier tube where the electrons cross:
a. Optical point
b. Electronic focal point
, c. Input focal point
d. Output focal point - Answers - b. Electronic focal point
As the illumination of the light source increases, visual acuity:
a. Increases
b. Decreases
c. Remains the same - Answers - a. Increases
note:
at low light = visual acuity is lowest
at bright light = visual acuity is max
The time over which the human eye can store a visual image is termed _____ time:
a. Adaptation
b. Acuity
c. Integration
d. Illumination - Answers - c. Integration
Which of the following structures if first to intercept light incident on the eye
a. Rods
b. Iris
c. Cornea
d. Cones - Answers - c. Cornea
The normal view distance for binocular vision is
a. 1-2 in
b. 4-8 in
c. 12-15 in
d. 16-20 in - Answers - c. 12-15 in
In general, during conventional fluoroscopic examinations the preferred technique is:
a. High kVp, low mA
b. High kVp, low mAs
c. Low kVp, high mAs
d. Low kVp, high mA - Answers - a. High kVp, low mA
Which of the following properties are associated with cones rather than rods:
a. Contrast perception
b. Color detection
c. Visual acuity
