Ch 1-4
In the electromagnetic spectrum, higher frequencies are associated with _____ wavelengths and _____energies.
shorter; higher
a Geiger Muller survey meter is also called a _________
Cutie Pie
During which of the following subphases of mitosis do the centrioles migrate to opposite sides of the cell and begin to regulate the formation of the mitotic spindle?
Anaphase, metaphase, prophase
Prophase
The prodromal stage of acute radiation syndrome is actually considered which stage?
Beginning
All digital imaging devices are subject to certain artifacts such as which of these?
1. aliasing.
2. moirè patterns.
3. contouring.
All 3
Which of the following is not a type of interaction between x-radiation and biologic matter?
Compton, Brems, Pair Production
Brems
Which component of the Geiger-Muller survey meter alerts the operator to the presence of ionizing radiation?
An audible speaker that makes sound when radiation is present.
Antibodies are protein molecules created by specialized cells in the bone marrow called
B- Lymphocytes
A term that is synonymous with loss of hair is
Epilation
When performing a mobile radiographic procedure, to reduce the radiation exposure to the patient, the radiographer must use a minimal source-skin distance of at least
30 cm
Cataract formation, fibrosis, reduced fertility, and sterility are classified as
Late Tissue Reactions
What are the 3 filters in an OSL dosimeter?
Tin, Copper, aluminum
Radiation dose that may cause permanent sterility in a male human?
5-6 Gy
Grenz rays were once used to treat and successfully cure
Ringworm
Total filtration of _______________________ for fixed x-ray units operating above 70 kVp is the regulatory standard.
2.5 mm
The x-ray photon energy required to initiate pair production is
(close counts)
1.022 MeV
The optically stimulated luminescence (OSL) dosimeter is “read out” by using what?
a laser light at different frequencies
Which of the following curves illustrates the radiation sensitivity of a particular type of cell?
Cell Survival Curve
Radiation-induced cataracts in humans follow a ______ dose–response relationship.
Threshold- non linear
In CT, miscentering of ________ can produce as much as __________% increase in patient dose.
2 cm, 25%
What is the total average annual radiation equivalent dose for estimated levels of radiation exposure for humans?
5.5 mSv
What time of dosimeter can give an immediate read out through USB or bluetooth?
Personnel direct ion storage dosimeter
What two tissues contain cells that do not divide?
Nerve and Muscle
The correct order of development for the female germ cell from the stem cell phase to the mature cell is
ovum, mature follicle, corpus luteum, primordial follicle.
corpus luteum, primordial follicle, mature follicle, ovum.
primordial follicle, mature follicle, corpus luteum, ovum.
primordial follicle, mature follicle, corpus luteum, ovum.
When an exposed computed radiography imaging plate is ready to be processed, an imaging reading unit is used to scan the photostimulable phosphor imaging plate with
helium- neon laser