Study sets matching "radiology 4"

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Study sets matching "radiology 4"

29 terms
Radiology 4
Why do radiographs display geometric c…
How is Image Clarity described?
Sharpness
Resolution
1. Xrays originate from an "area" rather than a "point" (foca…
1. Sharpness... 2. Resolution
How well an edge is defined on an image
Ability to perceive objects as separate entities
Why do radiographs display geometric c…
1. Xrays originate from an "area" rather than a "point" (foca…
How is Image Clarity described?
1. Sharpness... 2. Resolution
29 terms
Radiology- Ch. 4: Radiology Biology
Ionization Process
Ion
Ionization Results
Free Radical Formation
Process of removing an electron from a neutral atom to produc…
An atom or subatomic particle with a positive or... negative cha…
The ejected electrons go on to react with other atoms... in the…
Causes most damage; Uncharged atom with an unpaired electron…
Ionization Process
Process of removing an electron from a neutral atom to produc…
Ion
An atom or subatomic particle with a positive or... negative cha…
Radiology 4
radiolucent
radiopaque
safelight
scatter
permits radiation to pass through
does not permit passage of radiation
special light that will not expose film when turned on
useless secondary radiation
radiolucent
permits radiation to pass through
radiopaque
does not permit passage of radiation
5 terms
Radiology 4
AC Electricity
1/4 second is how many impulses
Amperes
Voltage
Movement of e- along a wire toward a + charge... >changes direct…
15
amps (mA) number of e- flowing
kVp potential differences between - and +... >speed, force of mo…
AC Electricity
Movement of e- along a wire toward a + charge... >changes direct…
1/4 second is how many impulses
15
Radiology 4
What are natural sources of radiation?…
T/F: A chest X-ray produces less radia…
What can change the amount of cosmic r…
T/F: Natural radiation is less than ar…
Natural: cosmic rays, terrestrial, internal radiation and rad…
True
Cosmic Radiation: The sun and stars send a constant stream of…
False - it is more (85% vs 15%)
What are natural sources of radiation?…
Natural: cosmic rays, terrestrial, internal radiation and rad…
T/F: A chest X-ray produces less radia…
True
43 terms
Radiology 4
What are the natural sources of radiat…
What are the man-made sources of radia…
__________: The sun and stars send a c…
Define Terrestrial radiation?
cosmic rays, terrestrial, internal radiation and radon.
medical-diagnosis and treatment, consumer and industrial prod…
Cosmic Radiation; cosmic x-rays
is radiation emitted by elements that occur naturally in the…
What are the natural sources of radiat…
cosmic rays, terrestrial, internal radiation and radon.
What are the man-made sources of radia…
medical-diagnosis and treatment, consumer and industrial prod…
35 terms
Radiology lecture 4
Asymmetric narrowed joint spaces... Subar…
Early Findings... Pericapsular swelling a…
Step off sign
Boxers fracture
Osteoarthritis findings
RA findings
Asymmetric narrowed joint spaces... Subar…
Osteoarthritis findings
Early Findings... Pericapsular swelling a…
RA findings
16 terms
Radiology 4
Anode
Target point
Primary radiation
Milliampere
The positive electrode in the tube head
The focal spot of the anode attracts the stream of free elect…
Shorter wavelengths that penetrate the tissue and film
(mA) controls the number of electrons released (1/1000)
Anode
The positive electrode in the tube head
Target point
The focal spot of the anode attracts the stream of free elect…
65 terms
Radiology 4
Incipient caries
Occlusal, Buccal, lingual
Crater shaped
Cervical burnout, restorations, abrasi…
Extends less than halfway through enamel
This type of caries is difficult to see on x ray
Shape of cemental caries
4 things that resemble caries
Incipient caries
Extends less than halfway through enamel
Occlusal, Buccal, lingual
This type of caries is difficult to see on x ray
25 terms
Radiology #4
Ultrasound
Pulse echo principle
US Propagation
Velocity
-non-invasive... -no ionizing radiation... -wall thickness... -interna…
-short burst of sound that is sent into tissues and reflects…
travels through tissue in waves of compression and rarefaction
-depends on medium in which sound is traveling... -slow in gas;…
Ultrasound
-non-invasive... -no ionizing radiation... -wall thickness... -interna…
Pulse echo principle
-short burst of sound that is sent into tissues and reflects…
Par 4- Radiology: Conventional Radiology
What are the two types of films used i…
How is an image created using direct e…
Emulsion is designed to be ________ (m…
what kind of exposure film is used wit…
Direct and Indirect
The deposition of XR energy directly into the photosensitive…
MORE
Indirect Exposure Films (screen film)
What are the two types of films used i…
Direct and Indirect
How is an image created using direct e…
The deposition of XR energy directly into the photosensitive…
34 terms
Radiology #4
Latent period
Free radical
Indirect radiation occurs
Linear, nonthreshold
exposure to x-radiation and clinical symptoms
uncharged molecule, has unpaired electron, highly reactive an…
when x-ray photons are absorbed and form toxins
response of tissues to radiation
Latent period
exposure to x-radiation and clinical symptoms
Free radical
uncharged molecule, has unpaired electron, highly reactive an…
13 terms
Radiology 4
NCCT
IVP
Moth eaten calyces on IVP... putty kidney…
On IVP... egg in cup appearance ... Golf bal…
IOC for urinary stones !!!
IOC for renal TB
Renal TB ... Kidney is calcified and non functional ... Bladder is…
Papillary necrosis
NCCT
IOC for urinary stones !!!
IVP
IOC for renal TB
13 terms
Radiology 4
primary beam
Secondary beam
Scattered beam
discovered x radiation 1895
useful beam most power full
occurs when it hits matter... less powerful
travels in straight line when defected by matter and bounces…
wilhelm conrad rotengen
primary beam
useful beam most power full
Secondary beam
occurs when it hits matter... less powerful
Radiology 4
Bone islands are common T or F.
Bone islands can be found in the spine…
Differential diagnosis for bone island…
Osteomas are found most exclusively wh…
True
True
Os Odontoideum
Skull
Bone islands are common T or F.
True
Bone islands can be found in the spine…
True
Radiology: Chapters 3&4
absorbed dose
dose equivalent
dosimeter
dosimetry
the quantity of energy imparted by ionizing radiations to mat…
the quantity obtained by multiplying the absorbed dose in tis…
a device used to measure radiation exposure to personnel
various methods used to measure radiation exposure to personnel
absorbed dose
the quantity of energy imparted by ionizing radiations to mat…
dose equivalent
the quantity obtained by multiplying the absorbed dose in tis…
155 terms
RAdiology 1-4
1 kilo electron volt = how many electr…
Two or more atoms joined by chemical b…
How are molecules formed
Ion
1000
Molecule
Transfer of electrons or sharing of electrons between the out…
Atom that gains or loses an electron
1 kilo electron volt = how many electr…
1000
Two or more atoms joined by chemical b…
Molecule
28 terms
Radiology 4
BLESSED
Cleidocranical Dysplasia
Gardner's Syndrome
Hypodontia
Border... Location... Entity... Shape... Size... Effects on neighbor... Density
-skull, clavicle, and dentition defects... -short... -small or miss…
-multiple osteomas... -enostosis... -polyps of intestine... -multiple…
missing few teeth
BLESSED
Border... Location... Entity... Shape... Size... Effects on neighbor... Density
Cleidocranical Dysplasia
-skull, clavicle, and dentition defects... -short... -small or miss…
22 terms
radiology #4
technique
kv
wavelength
Fifteen Percent Rule
systematic procedure to produce high quality radiograph. cont…
the energy or QUALITY of the X-ray film and penetrating of th…
is the distance from the crest of the wave to the crest of th…
an increase in kV by 15% will result in doubling the amount o…
technique
systematic procedure to produce high quality radiograph. cont…
kv
the energy or QUALITY of the X-ray film and penetrating of th…
46 terms
4. Cardiovascular Radiology
Cardiovascular Imaging Modalities
Echocardiography
Echo Image
Nuclear Imaging
Chest X-Ray... Echocardiography... - Vascular ultrasound... Nuclear…
non-invasive
need to inject an isotope that is usually tagged ... If we see…
Cardiovascular Imaging Modalities
Chest X-Ray... Echocardiography... - Vascular ultrasound... Nuclear…
Echocardiography
non-invasive
131 terms
Radiology Chapters 4 and 5
Power (W) =
Unit of Power
Today's x-ray units use a max of
Generators in clinics are rated at
current (I) x volts (V)
Watt
300 milliamperes and 125,000 volts
30,000 W (power) minimum
Power (W) =
current (I) x volts (V)
Unit of Power
Watt
30 terms
Radiology 4
Process by which bone forms
Primary center for ossification
Secondary center for ossification
Contains thicker layer of compact bone…
Ossification
Diaphysis
Epiphysis
Body (shaft)
Process by which bone forms
Ossification
Primary center for ossification
Diaphysis
130 terms
Radiology part 4
Dens fracture
Os Odontoideum
Diffuse idiopathic
DJD spine
Dens fracture
Os Odontoideum
63 terms
Radiology - Test 4
ALARA
Conditions for necessary x-rays on ped…
When would it be necessary to take BWs…
Radiation Protection
as low as reasonably achievable
high risk of caries... abscess, cyst, granuloma... developmental ab…
if the child has touching contacts
lead apron/thyroid collar... fast film... minimum number of x-rays…
ALARA
as low as reasonably achievable
Conditions for necessary x-rays on ped…
high risk of caries... abscess, cyst, granuloma... developmental ab…
61 terms
Radiology PP 4
What are the 4 steps in how to search…
Virtually all gas in the bowel comes f…
Loops of the bowel that are filled bey…
Distension of the bowel is _____.... Dil…
1. Overall gas pattern... 2. Extraluminal air... 3. Abnormal calcif…
swallowed
dilated
1. normal... 2. abnormal
What are the 4 steps in how to search…
1. Overall gas pattern... 2. Extraluminal air... 3. Abnormal calcif…
Virtually all gas in the bowel comes f…
swallowed
125 terms
Radiology: Exam 4
When the bisecting technique is used,…
The angle formed by the film and the l…
When the bisecting technique is used,…
When the stabe bite-block is used with…
Lingual
Bisected
90
Close; removed
When the bisecting technique is used,…
Lingual
The angle formed by the film and the l…
Bisected
23 terms
Radiology Ch. 4
ionization radiation
free radical formation
direct theory
indirect theory
results when x-rays strike patient tissue
formed when an x-ray photon ionizes water. Highly reactive an…
cell damage results when ionizing radiation directly hits cri…
x-ray photons are absorbed within the cell and cause the form…
ionization radiation
results when x-rays strike patient tissue
free radical formation
formed when an x-ray photon ionizes water. Highly reactive an…
Radiology chapter 4
The latent period in radiation biology…
A free radical is
Direct radiation injury occurs when
indirect theory proposes
Exposure to x-radiation and clinical symptoms
Uncharged molecule,unpaired electron in the outer shell,highl…
X-ray photons hit critical targets within a cell
Free radical combine to form toxins
The latent period in radiation biology…
Exposure to x-radiation and clinical symptoms
A free radical is
Uncharged molecule,unpaired electron in the outer shell,highl…
Radiology Vocab 4
Scattered radiation
Stray radiation
Fluroscope
Intensifying screen
Radiation that during the passage through a substance has bee…
All radiation emitted in directions other than the useful bea…
A device which enables one to see at once the image of an obj…
A device used to help the x-Ray film obtain an image in a sho…
Scattered radiation
Radiation that during the passage through a substance has bee…
Stray radiation
All radiation emitted in directions other than the useful bea…
76 terms
Radiology Lecture Chapter 4
What are the three basic requirements…
What terms should be used when describ…
Portion of the image that is dark or b…
Portion of the image that is light or…
1. All parts of the structures recorded must be imaged as clo…
radiolucent, radiopaque, density, contrast, and sharpness
Radiolucent
Radiopaque
What are the three basic requirements…
1. All parts of the structures recorded must be imaged as clo…
What terms should be used when describ…
radiolucent, radiopaque, density, contrast, and sharpness
Radiology topic 4
The quality of the xray beam is cotrol…
Kilovoltage range
Higher kilovoltage produces X-rays with
Volt
Kilovoltage peak
65-100
Shorter wavelengths
Measurement used to describe the amount of electric current f…
The quality of the xray beam is cotrol…
Kilovoltage peak
Kilovoltage range
65-100
73 terms
Radiology ch. 4
radiolucent
radiopaque
density
little density
dark
white
the degree of darkness or image blackening
an image that appears light
radiolucent
dark
radiopaque
white
9 terms
Radiology quiz #4
4 basic components of an x-ray film
Adhesive layer
Film emulsion
Film base
-film base... -adhesive layer... -film emulsion... -protective layer
Attaches the emulsion to the base
Coating with a mixture of gelatin and silver halide crystals…
0.2 mm thick piece of polyester plastic provides strength
4 basic components of an x-ray film
-film base... -adhesive layer... -film emulsion... -protective layer
Adhesive layer
Attaches the emulsion to the base
32 terms
Radiology Ch. 4
Contrast
Crystal
Definition
Density
The visual differences between shades ranging from black to w…
Term used to refer to the silver halide combinations that are…
Sharpness and clarity of the outline of the structures in a r…
The overall darkness or blackening of the radiographic image.…
Contrast
The visual differences between shades ranging from black to w…
Crystal
Term used to refer to the silver halide combinations that are…
Radiology Ch 1-4
Define radiation:
Define electromagnetic radiation:
Define xray:
Define xray beam:
energy carried by waves or a stream of particles
method of transporting energy through space. xray.
a form of electromagnetic radiation similar to visible light…
a number of xrays traveling together through space at a rapid…
Define radiation:
energy carried by waves or a stream of particles
Define electromagnetic radiation:
method of transporting energy through space. xray.
13 terms
radiology midterm Ch. 4
what are the three basic requirements…
short scale contrast
long scale contrast
small focal spot (rules for shadow cas…
1. all parts of the structures recorded must be imaged as clo…
black/white (usually at 70 kpv)
more gray shades
to reduce the size of the penumbra (partial shadow arround th…
what are the three basic requirements…
1. all parts of the structures recorded must be imaged as clo…
short scale contrast
black/white (usually at 70 kpv)
191 terms
Radiology Exam 4
Chapter 18
Whats describes a product or method th…
protection against infection during an…
The removal or destruction of infected…
Aseptic Techniques
Aseptic
B. surgical asepsis
A. Medical asepsis
Chapter 18
Aseptic Techniques
Whats describes a product or method th…
Aseptic
Radiology Unit 3/4
Fluroscopy
Angiography
Radiation Therapy/Radiotherapy
Brachytherapy
Used for real time dynamic viewing of anatomic structures
X-ray study of blood vessels using injection of contrast media
Medical use of ionizing radiation as part of cancer treatment…
Form of interventional radiology used to treat coronary in-st…
Fluroscopy
Used for real time dynamic viewing of anatomic structures
Angiography
X-ray study of blood vessels using injection of contrast media
51 terms
Radiology midterm (4)
The goal when exposing dental radiogra…
What are the two techniques for exposi…
Objective of both paralleling techniqu…
Objective of both paralleling techniqu…
1. accurate in size... 2. free from distortion... 3. correctly prop…
Paralleling and bisecting technique
horizontal and vertical angles
distortion and most accurate representation
The goal when exposing dental radiogra…
1. accurate in size... 2. free from distortion... 3. correctly prop…
What are the two techniques for exposi…
Paralleling and bisecting technique
10 terms
Radiology Vocal 4
Scattered Radiation
Stray Radiation
Fluoroscope
Intensifying Screen
radiation during the passage through a substance has been dev…
all radiation emitted in directions other than the useful bea…
device enables one to see at once the image of and object exp…
device used to help the x-ray film obtain an image in a short…
Scattered Radiation
radiation during the passage through a substance has been dev…
Stray Radiation
all radiation emitted in directions other than the useful bea…
46 terms
Radiology Quiz #4
Definition: The intensity of reflectio…
Does anechoic tissue reflect more or l…
How would you classify a urinary bladd…
Why is it necessary to clip fur and ap…
echogenicity
less
anechoic
to minimize the amount of air and space between the patient a…
Definition: The intensity of reflectio…
echogenicity
Does anechoic tissue reflect more or l…
less
Radiology Image 4
A
B
C
D
radius
scaphoid
radial styloid
trapezium
A
radius
B
scaphoid
10 terms
Radiology I CH. 4
All ionizing radiations are...
Although amount of xradiation used is…
radiation biology is...
... all xrays pass through pt. and rea…
harmful and produce biologic changes in living tissues.
biological damage can occur.
study of effects of ionizing radiation on living tissues.
not.
All ionizing radiations are...
harmful and produce biologic changes in living tissues.
Although amount of xradiation used is…
biological damage can occur.
Dental Radiology #4
Parallel Technique
Periapical Film
Bitewing exposure
Occlusial
1) Long axis of tooth and film are parallel to eachother... 2) T…
Used to show root apex of tooth and surrounding structures
Used to detect interproximal decay and height of alveolar bone
Used to view cross section of the teeth and complete palatal…
Parallel Technique
1) Long axis of tooth and film are parallel to eachother... 2) T…
Periapical Film
Used to show root apex of tooth and surrounding structures
20 terms
Radiology ch 4
Developer chemicals include (4)
Developing agent chemicals (2)
Hydroquione
Elon
developing agents/reducing agents... Preservatives... Activator/alk…
Hydroquinone... Elon
builds up density and contrast
brings out the grey shades (contrast) of the image.
Developer chemicals include (4)
developing agents/reducing agents... Preservatives... Activator/alk…
Developing agent chemicals (2)
Hydroquinone... Elon
42 terms
Radiology Lecture #4
How do I start to read an x-ray?
What are we looking for in quality ass…
How do you position AP and oblique fil…
How do you position lateral view films?
Quality assurance... Get organized
Correct patient... correct foot... correct date... adequate exposure
TOES UP
Landscape position
How do I start to read an x-ray?
Quality assurance... Get organized
What are we looking for in quality ass…
Correct patient... correct foot... correct date... adequate exposure
5 terms
radiology week 4 quiz
MPD for occupational personnel is .05…
The ALARA principle is an anagram for:…
Secondary or scattered radiation occur…
The fetus will be affected by radiatio…
SV
a. As Low As Reasonably Achievable
c. when the primary beam interacts with atoms within the pati…
b. particularly during the first trimester (the second to ten…
MPD for occupational personnel is .05…
SV
The ALARA principle is an anagram for:…
a. As Low As Reasonably Achievable
Radiology 4, 5, and 17
Radiation biology:
Free radical:
Ionization:
Free radical formation:
The study of the effects of ionizing radiation on living tiss…
Uncharged atom or molecule that exists with a single, unpaire…
Results when x-rays strike patient tissue and is produced thr…
Formed when x-ray photons ionize water, highly reactive and u…
Radiation biology:
The study of the effects of ionizing radiation on living tiss…
Free radical:
Uncharged atom or molecule that exists with a single, unpaire…
32 terms
Radiology (4)- Cysts
BBC (buccal bifurcation cyst) (paraden…
A. periapical cyst B. periapical cyst…
BBC (buccal bifurcation cyst) (paraden…
benign
benign or malignant?
BBC (buccal bifurcation cyst) (paraden…
A. periapical cyst B. periapical cyst…
28 terms
Radiology (Lect 4 PPT)
What percent of photons are absorbed f…
What percent of photons are absorbed f…
What's another name for Compton Scatte…
What percent of photons are absorbed f…
32%
60%
inelastic scattering
8%
What percent of photons are absorbed f…
32%
What percent of photons are absorbed f…
60%
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