final review Flashcards
what is the most common unit of equivalent dose?
mSv (effective dose is also expressed in this; takes into type of radiation + body part)
the linear threshold curve implies biologic response is
directly proportional to dose
example of linear threshold response
skin erythema
T/F: cataracts, fibrosis, and sterility are classified as early tissue reactions
false
how is dose area product usually specified?
mGy-cm^2
entire amount of energy delivered by x-ray beam
dose area product (DAP)
which action of ionizing radiation is usually most harmful to the human body
indirect action
indirect action results in ________ and is (more/less) harmful to the human body
free radicals, more
how many amino acids are involved in protein synthesis in humans?
22
the prodromal stage of acute radiation syndrome is also called the
beginning stage
T/F: total filtration of 2.5 mm aluminum equivalent for fixed x-ray units is required
true (also required of portable units and fluoro units)
the human body can incorporate radium into bone because it is chemically similar to
calcium
this projection will significantly lower dose to breast tissue during a routine CXR
PA
who should determine the exact shielding requirements for a facility?
medical physicist
which of the following is not commonly used in CT?
-tight x-ray beam collimation
-filtered back projection
-direct patient shielding
-all of the above
direct patient shielding
