W/L Ch 21 Simulator Design Quiz Flashcards
The central axis of the beam is ________________________.
a. always located in the center of the treatment field
b. the only area that is nondivergent
c. aligned with the isocenter
d. both a and c
e. both b and c
f. a, b, and c
e. both b and c
The conventional simulator can define treatment fields by using which of the following?
a. Blades
b. Wires
c. OID
d. Collimator assembly
b. Wires
In the conventional simulator, the _____________ represent(s) the radiation field.
a. blades
b. wires
c. OID
d. collimator assembly
a. blades
The blades, also called the beam-restricting diaphragms, delineate the radiation field.
Which of the following represents the path of a photon when it enters the image intensifier?
a. Input phosphor, electrostatic lenses, photocathode, anode, output screen
b. Input phosphor, photocathode, electrostatic lenses, anode, output screen
c. Input phosphor, anode, electrostatic lenses, photocathode, output screen
d. Anode, input phosphor, electrostatic lenses, photocathode, output screen
b. Input phosphor, photocathode, electrostatic lenses, anode, output screen
Conventional simulators are designed to simulate the ____________, geometric, and optical properties of a variety of treatment units.
a. x-ray
b. mechanical
c. comfort
d. linear design
b. mechanical
Light photons are produced and transmitted electronically through to a video image at which of the following?
a. Output phosphor
b. Tube housing
c. Photocathode
d. Focusing lenses
a. Output phosphor
The patient couch tabletop is created out of this material, which has a low density and low x-ray absorption.
a. Plastic carbonate
b. Carbon fiber
c. Steel
d. Polystyrene
b. Carbon fiber
__________ takes into consideration how an area on the other side of an irradiated wall is going to be used.
a. Workload
b. Occupancy factor
c. Use factor
d. Barrier factor
b. Occupancy factor
___________ takes into consideration how much a machine will run in a normal week.
a. Workload
b. Occupancy factor
c. Use factor
d. Barrier factor
a. Workload
Where are positioning lasers located? I. Side (lateral) II. Overhead III. Sagittal IV. Coronal
a. I and II
b. I, II, and III
c. II and III
d. All of the above
b. I, II, and III
Most computed tomography (CT) scanners today are _______-generation imaging systems.
a. first
b. second
c. third
d. fourth
c. third
A(n) _________ ring allows the CT x-ray tube to rotate in a continuous motion without the concern of cables becoming tangled.
a. spiral
b. slip
c. aperture
d. electrical power
b. slip
The slip ring is similar to the metal on the ceiling of a bumper car ride. The power to the CT is conducted by the metal brushes on the ring.
Which of the following details the difference in completing an axial scan as compared to spiral CT?
a. Aperture size is larger in an axial scanner.
b. Detector size is larger in the spiral CT scanner.
c. Gantry is rotating in a diagonal.
d. Table moves for the spiral CT.
d. Table moves for the spiral CT.
CT numbers are also known as which of the following?
a. Hounsfield units
b. Godfrey units
c. Attenuation coefficient units
a. Hounsfield units
The CT number for dense bone is _________.
a. –1000
b. –100
c. 0
d. 1000
d. 1000
The CT values range from –1000 for air to 1000 for bone.
