Chapter 9 Intro to Radiologic & Imaging Sciences & Patient Care
Study online at https://quizlet.com/_8rffek
1. ionizing radia- _____________ _____________ is energy capable of
tion penetrating matter and possesses sufficient energy to
eject orbital electrons along its path
2. natural and hu- The two basic sources of ionizing radia-
man-made tion exposure are ______________ radiation and
____________________ radiation sources.
3. benefits The _____________ must outweigh the risks of any diag-
nostic study using ionizing radiation.
4. x-rays Human-made ionizing radiation is also known as
5. x-rays a form of electromagnetic radiation that travels at the
speed of light
6. nuclear indus- sources of human-made radiation include
try, radionu-
clides, medical
and dental expo-
sures, and some
consumer prod-
ucts
7. medical and den- The largest portion of human-made radiation exposure
tal x-ray exami- comes from
nations
8. 1. a source of Conditions necessary for x-ray production
electrons
2. a means to
rapidly acceler-
ate the electrons
3. something to
rapidly stop this
movement
9. A cathode - (neg- What is an x-ray tube composed of?
ative terminal)
and an anode
, Chapter 9 Intro to Radiologic & Imaging Sciences & Patient Care
Study online at https://quizlet.com/_8rffek
+ (positive termi-
nal), enclosed in
a special heat re-
sistant glass en-
velope to main-
tain the vac-
uum necessary
for optimal x-ray
production.
10. cathode The filament in the ______________ assembly is com-
posed of thoriated tungsten, which provides the source
of electrons
11. thermionic emis- When milliamperage (electric current) is applied to the
sion filament, it responds by boiling off electrons this is known
as
12. anode Once kilovoltage (high voltage) is applied to the tube ter-
minals, the electrons resulting from thermionic emission
instantaneously accelerate toward the ___________ end
of the tube, x-rays are produced when the electrons strike
the __________, undergoing an energy conversion that
produces both x-rays and heat.
13. kiloelectron volts The resultant x-ray beam is heterogeneous - that is, it has
(keV) many energies measured in _________ ___________
14. primary or useful x-ray beam leaving the x-ray tube toward the patient
beam is known as _______________ or ________________
______________
15. 1. they can be ab- Once x-rays strike matter, three possibilities exists:
sorbed
2. they can trans-
fer some energy
and then scatter
(no loss of ener-
gy)
3. they can pass
Study online at https://quizlet.com/_8rffek
1. ionizing radia- _____________ _____________ is energy capable of
tion penetrating matter and possesses sufficient energy to
eject orbital electrons along its path
2. natural and hu- The two basic sources of ionizing radia-
man-made tion exposure are ______________ radiation and
____________________ radiation sources.
3. benefits The _____________ must outweigh the risks of any diag-
nostic study using ionizing radiation.
4. x-rays Human-made ionizing radiation is also known as
5. x-rays a form of electromagnetic radiation that travels at the
speed of light
6. nuclear indus- sources of human-made radiation include
try, radionu-
clides, medical
and dental expo-
sures, and some
consumer prod-
ucts
7. medical and den- The largest portion of human-made radiation exposure
tal x-ray exami- comes from
nations
8. 1. a source of Conditions necessary for x-ray production
electrons
2. a means to
rapidly acceler-
ate the electrons
3. something to
rapidly stop this
movement
9. A cathode - (neg- What is an x-ray tube composed of?
ative terminal)
and an anode
, Chapter 9 Intro to Radiologic & Imaging Sciences & Patient Care
Study online at https://quizlet.com/_8rffek
+ (positive termi-
nal), enclosed in
a special heat re-
sistant glass en-
velope to main-
tain the vac-
uum necessary
for optimal x-ray
production.
10. cathode The filament in the ______________ assembly is com-
posed of thoriated tungsten, which provides the source
of electrons
11. thermionic emis- When milliamperage (electric current) is applied to the
sion filament, it responds by boiling off electrons this is known
as
12. anode Once kilovoltage (high voltage) is applied to the tube ter-
minals, the electrons resulting from thermionic emission
instantaneously accelerate toward the ___________ end
of the tube, x-rays are produced when the electrons strike
the __________, undergoing an energy conversion that
produces both x-rays and heat.
13. kiloelectron volts The resultant x-ray beam is heterogeneous - that is, it has
(keV) many energies measured in _________ ___________
14. primary or useful x-ray beam leaving the x-ray tube toward the patient
beam is known as _______________ or ________________
______________
15. 1. they can be ab- Once x-rays strike matter, three possibilities exists:
sorbed
2. they can trans-
fer some energy
and then scatter
(no loss of ener-
gy)
3. they can pass
