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Study sets matching "ct"

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Study sets matching "ct"

8 terms
CT
sequential and helical
Tube and detectors circle the motionle…
-No data interpolation... -Can tilt the g…
-Brain scan... -gated scans
What are the 2 fundamental methods of data aquisition?
What is sequential scanning?
What is the advantage of sequential scanning?
When is sequential scanning still utilized?
sequential and helical
What are the 2 fundamental methods of data aquisition?
Tube and detectors circle the motionle…
What is sequential scanning?
9 terms
CT
The function of PDU
CT Image chain element
Scout scan
Axial scan
Provides 120VAC to Table, Gantry, and Console... Provides 700VDC…
the tube is stationary at 0 (or 180) degrees or 90 (or 270) d…
the table moves to a slice location, then the tube rotates 36…
The function of PDU
Provides 120VAC to Table, Gantry, and Console... Provides 700VDC…
CT Image chain element
172 terms
CT
Hyaline cartilage... - Perichondrium w/ c…
Hyaline cartilage... - Perichondrium w/ c…
Hyaline cartilage... - Perichondrium w/ c…
Elastic cartilage... - Perichondrium... - Hy…
Hyaline cartilage... - Perichondrium w/ c…
Hyaline cartilage... - Perichondrium w/ c…
15 terms
ct
prolix
proof
propinquity
protean
tính dài dòng, rườm rà
bằng chứng chiu dung dc chong dc
nearness; kinship sự gần gũi (về không gian, thời gian;…
Hay thay đổi ko kien dinh
prolix
tính dài dòng, rườm rà
proof
bằng chứng chiu dung dc chong dc
15 terms
CT
Fibroblasts
Macrophages
Adipocytes
Collagen
Function: cells that make collagen + elastic fibers.... Location…
Function: engulf foreign particles and debris of dead cells.…
function: fat cells... location: CT
function: stronger fibers in connective tissue... location: CT
Fibroblasts
Function: cells that make collagen + elastic fibers.... Location…
Macrophages
Function: engulf foreign particles and debris of dead cells.…
10 terms
ct
cat
cat
cat
cat
cat
cat
cat
cat
cat
cat
cat
cat
CT
Adipose Connective Tissue
Reticular Connective Tissue
Dense Regular Connective Tissue
Dense Irregular Connective Tissue
Adipose Connective Tissue
Reticular Connective Tissue
104 terms
CT
X ray tube
Detector Assmbly
Computer
Tomography
A patient is scanned by a _________ rotating around the body
A ________ measures the radiation exiting the patient.
A _______ sends acquired data through various functions to be…
When an x ray source moves in one direction as the x ray film…
X ray tube
A patient is scanned by a _________ rotating around the body
Detector Assmbly
A ________ measures the radiation exiting the patient.
182 terms
CT
WHICH CT PARAMETER IS...... TIME IT TAKE…
WHICH CT PARAMETER IS...... AMOUNT OF CON…
WHICH CT PARAMETER IS...... FORCE NEEDED…
WHICH CT PARAMETER IS...... INJECTION OR…
ANSWER IS B ... RISE TIME
ANSWER IS D ... TOTAL VOLUME
ANSWER IS C ... INJECTION PRESSURE ... DEPENDS ON VASCULAR STRUCTU…
ANSWER IS E... DELAY
WHICH CT PARAMETER IS...... TIME IT TAKE…
ANSWER IS B ... RISE TIME
WHICH CT PARAMETER IS...... AMOUNT OF CON…
ANSWER IS D ... TOTAL VOLUME
24 terms
CT
the phantom is used to test what quali…
the hallmark for focal nodular hyperpl…
what number is the LT common carotid a…
what is suitable range for I/V during…
spatial resolution
central scar that remains hypodense after I/V contrast
4
12-14 mL
the phantom is used to test what quali…
spatial resolution
the hallmark for focal nodular hyperpl…
central scar that remains hypodense after I/V contrast
26 terms
CT
What is a linear attenuation coefficie…
What is a Hounsfield unit?
What is the HU for water? Would bone h…
What is volume averaging?
Attenuation is the degree to which an x-ray beam is reduced.…
The numerical values that represent the degree of attenuation…
The HU for water is zero. Bone is denser than water, so it ha…
It is the process in CT where different tissue attenuations a…
What is a linear attenuation coefficie…
Attenuation is the degree to which an x-ray beam is reduced.…
What is a Hounsfield unit?
The numerical values that represent the degree of attenuation…
182 terms
CT
WHICH CT PARAMETER IS...... TIME IT TAKE…
WHICH CT PARAMETER IS...... AMOUNT OF CON…
WHICH CT PARAMETER IS...... FORCE NEEDED…
WHICH CT PARAMETER IS...... INJECTION OR…
ANSWER IS B ... RISE TIME
ANSWER IS D ... TOTAL VOLUME
ANSWER IS C ... INJECTION PRESSURE ... DEPENDS ON VASCULAR STRUCTU…
ANSWER IS E... DELAY
WHICH CT PARAMETER IS...... TIME IT TAKE…
ANSWER IS B ... RISE TIME
WHICH CT PARAMETER IS...... AMOUNT OF CON…
ANSWER IS D ... TOTAL VOLUME
239 terms
CT
applying mathematical filter to remove…
smallest binary information in compute…
where is the high frequency genarator…
3d ct technique that includes all of t…
convolution
bit
inside the gantry
volume rendering
applying mathematical filter to remove…
convolution
smallest binary information in compute…
bit
16 terms
CT
Longer than CT
Demonstrating soft tissues and bone
Television monitor
ANY PLANES
Scanning time of MRI comparef to CT is longer it shorter ?
State main purpose of the ct?
Where's the image displayed onto?
Image can be constructed into?... 1) 2 planes... 2) any plane... 3) d…
Longer than CT
Scanning time of MRI comparef to CT is longer it shorter ?
Demonstrating soft tissues and bone
State main purpose of the ct?
104 terms
CT
X ray tube
Detector Assmbly
Computer
Tomography
A patient is scanned by a _________ rotating around the body
A ________ measures the radiation exiting the patient.
A _______ sends acquired data through various functions to be…
When an x ray source moves in one direction as the x ray film…
X ray tube
A patient is scanned by a _________ rotating around the body
Detector Assmbly
A ________ measures the radiation exiting the patient.
25 terms
CT
CT was introduced when and by whom?
1st generation scanner
1st generation scanners took how long…
1st gen scanner appearance
-1970... -by Godfrey Hounsfield
-Pencil beam... -Single detector... -Translate, rotate 1 degree
5 minutes
CT was introduced when and by whom?
-1970... -by Godfrey Hounsfield
1st generation scanner
-Pencil beam... -Single detector... -Translate, rotate 1 degree
244 terms
CT
P Wave
T wave
systolic blood pressure
diastole blood pressure
Contraction of the left & right atria.
Relaxation after heart contraction. Complete cardiac diastole
Less than 120 mm Hg
Less than 80 mm Hg
P Wave
Contraction of the left & right atria.
T wave
Relaxation after heart contraction. Complete cardiac diastole
26 terms
CT
Matins
Lauds
Mass
Little Hour
6 am
7.30 am
8.45 am
1 pm
Matins
6 am
Lauds
7.30 am
239 terms
CT
applying mathematical filter to remove…
smallest binary information in compute…
where is the high frequency genarator…
3d ct technique that includes all of t…
convolution
bit
inside the gantry
volume rendering
applying mathematical filter to remove…
convolution
smallest binary information in compute…
bit
34 terms
ct
Plant on CT flag
What do they symbolize
State Bird
State tree
Grape Vine
...
American Robin
White oak
Plant on CT flag
Grape Vine
What do they symbolize
...
8 terms
CT
List the 3 Main Types of Connective Ti…
Types of CT Proper
What is the name of the tissue you see…
Name one place in the body where you c…
Connective tissue proper... Fluid connective tissue ... Supporting…
Loose connective tissue ... Dense connective tissue
Simple Cuboidal Epithelium
Kidney Tubules
List the 3 Main Types of Connective Ti…
Connective tissue proper... Fluid connective tissue ... Supporting…
Types of CT Proper
Loose connective tissue ... Dense connective tissue
146 terms
CT
Disadvantages of CR
Different scanners
Conventional scanner
Conventional scanners disadvantage
Superimposition of tissue groups, overlying structure noise,…
Conventional scanner, spiral scanner, multislice scanner
Narrow x-ray beam picked up by row of detectors, tube would u…
Slow can time, prone to artifact, small lesions may be missed…
Disadvantages of CR
Superimposition of tissue groups, overlying structure noise,…
Different scanners
Conventional scanner, spiral scanner, multislice scanner
44 terms
CT
CTA
Ionic agents
Water
Increase mA
With contrast
Increase adverse reactions
0
Decrease noise, increase dose, increase contrast resolution
CTA
With contrast
Ionic agents
Increase adverse reactions
35 terms
CT
Hound field scale
SFOV
DFOV
X plane
Water is 0... Less dense is a negative number ... More dense is a p…
Scan field of view ... - area within the gantry that raw data ca…
Raw data that is displayed to produce the image ... - selected a…
Axial/transverse
Hound field scale
Water is 0... Less dense is a negative number ... More dense is a p…
SFOV
Scan field of view ... - area within the gantry that raw data ca…
244 terms
CT
P Wave
T wave
systolic blood pressure
diastole blood pressure
Contraction of the left & right atria.
Relaxation after heart contraction. Complete cardiac diastole
Less than 120 mm Hg
Less than 80 mm Hg
P Wave
Contraction of the left & right atria.
T wave
Relaxation after heart contraction. Complete cardiac diastole
86 terms
CT
CT scan of the neck for a possible tum…
T or F: air may be injected into the j…
common pathological indications for a…
what is the contrast medium of choice…
2-3 mm
true
infection, spinal stenosis, and fractured vertebrae
air
CT scan of the neck for a possible tum…
2-3 mm
T or F: air may be injected into the j…
true
49 terms
CT
Pre-patient collimation
Pre-detector collimation
If pitch over 1?
Which CT numbers are absolute (fixed)…
Limits radiation exiting tube to desired beam shape
Decrease scatter entering detectors
(Increased pitch, faster table movement)... Potential gaps in da…
Air= -1000 HU... Water= 0 HU... Bone= +1000 HU
Pre-patient collimation
Limits radiation exiting tube to desired beam shape
Pre-detector collimation
Decrease scatter entering detectors
48 terms
CT
_ developed CT in the early 70's
The first scan took _ days and was a _…
what does EMI stand for?
first scanner was a _ unit only and to…
Hounsfield
9... cadaver
electronic music incorporated ... -Beatles
head... 1 hour
_ developed CT in the early 70's
Hounsfield
The first scan took _ days and was a _…
9... cadaver
35 terms
CT
Who developed the CT scanner?
Hounsfield's first scanner used what e…
Where was the first CT scanner install…
What is an image of a slice of the pat…
Godsfrey Hounsfield and Allan Cormack
Americium
Mayo Clinic
Tomographic Image
Who developed the CT scanner?
Godsfrey Hounsfield and Allan Cormack
Hounsfield's first scanner used what e…
Americium
141 terms
Ct.
Absorption efficiency
ACR CT phantom
Acute renal failure or ARF
Adaptive array
Ability of an individual CT detector to absorb and measure th…
A solid phantom that contains four modules and is constructed…
Rapid loss of renal function caused by damage to kidney resul…
Detector Rows that have variable with and sizes also called n…
Absorption efficiency
Ability of an individual CT detector to absorb and measure th…
ACR CT phantom
A solid phantom that contains four modules and is constructed…
170 terms
CT
CT introduced in early
75-85% of the density on the image is…
You need at least __% change in tissue…
CT can detect tissues with __% differe…
1970s
scatter radiation in form of fog
5.0%
0.5%
CT introduced in early
1970s
75-85% of the density on the image is…
scatter radiation in form of fog
29 terms
CT
Mediastinal Pleura
Costodiaphragmatic Recesses
Retroperitoneal
Rectouterine Pouch
thick, connective tissue membrane that surrounds the region b…
most inferior and posterior regions of the pleural cavity at…
space behind the peritoneal cavity and adjacent to the poster…
lowest part of abdominal cavity, an extension of peritoneal c…
Mediastinal Pleura
thick, connective tissue membrane that surrounds the region b…
Costodiaphragmatic Recesses
most inferior and posterior regions of the pleural cavity at…
153 terms
CT
Degenerative arthritis
Inflammatory arthritis
RF
Anti citrullinated protein antigen (AC…
Bony swelling worse w/ action. OA
Fluid/synovial swelling, systemic sx, autoimmune prompted, im…
IgM against Fc region of IgG. 60% sensitivity for RA.
60% sensitivity for RA, more specific. Gets deposited in join…
Degenerative arthritis
Bony swelling worse w/ action. OA
Inflammatory arthritis
Fluid/synovial swelling, systemic sx, autoimmune prompted, im…
10 terms
CT
Spatial Resolution
contrast resolution
Temporal Resolution
Noise
looks at the degree of blur or the ability to see the differe…
the ability to differentiate between small differences in des…
the ability of the CT system to freeze any motion of a scanne…
random variation of CT numbers around some mean value within…
Spatial Resolution
looks at the degree of blur or the ability to see the differe…
contrast resolution
the ability to differentiate between small differences in des…
40 terms
CT
tomography
z-axis
beam attenuation
Linear attenuation coefficient
"cut picture" cross sectional images of human body
thickness of cross sectional slice (longitudinal length of th…
degree to which an x-ray beam is reduced by an object
amount of the x-ray beam that is absorbed per unit thickness…
tomography
"cut picture" cross sectional images of human body
z-axis
thickness of cross sectional slice (longitudinal length of th…
29 terms
CT
radio graphic
CT
CCT (cranial CAT scan)
first generation scanners
loaf
slice
3-D free of superimposition, more sensitive to diff. in tissu…
1-2 scanners, 4 1/2 min. scans
radio graphic
loaf
CT
slice
42 terms
CT
Reason
Conclusion
Assertion
Hypothetical Reasoning
A statement that aims to persuade a reader to accept a conclu…
A statement the arguer intends the reader to accept based on…
A claim made without drawing a conclusion
In which a condition is given for a consequence to follow; if…
Reason
A statement that aims to persuade a reader to accept a conclu…
Conclusion
A statement the arguer intends the reader to accept based on…
10 terms
CT
Always think __ when hypoxemia is out…
Contrast is better to evaluate __.
Always look for the (primary/highest s…
Big lung fields (hyperinflation), flat…
PE
the mediastinum
highest stage
COPD
Always think __ when hypoxemia is out…
PE
Contrast is better to evaluate __.
the mediastinum
38 terms
CT
What is computed tomography
Where are the detectors placed for com…
How are CT scanners classified?
What is an attenuation value?
radiographs where the pt is tube in an xray tube and the tube…
arranged opposite the xray tube... Measure the attenuation of th…
according to the way the xray tube and detectors are arranges…
how much of the xray is absorbed in the patient
What is computed tomography
radiographs where the pt is tube in an xray tube and the tube…
Where are the detectors placed for com…
arranged opposite the xray tube... Measure the attenuation of th…
39 terms
CT
Parameters controlled by the operator…
Performance described by:
Quantity of x-ray energy determined by:
Quality of x-ray beam determined by an…
KV, MA, scan time, slice thickness, FOV, algorithm, pitch
high, low, temporal resolution, CT# uniformity, accuracy, noi…
mA and scan time (mAs)
kVp, 120-140 for adults, 80-120 for pediatrics
Parameters controlled by the operator…
KV, MA, scan time, slice thickness, FOV, algorithm, pitch
Performance described by:
high, low, temporal resolution, CT# uniformity, accuracy, noi…
18 terms
CT
What is the primary purpose of the SLQ…
Does the SLQ-32 give you range? Why?
Where are the SLQ-32 antennas
Does the SLQ-32 have electronic attach…
Anti ship missle defence
No it's a receiver. Depends on how far the radio waves travel
Port and starboard on the 03 level below CWIS
Yes
What is the primary purpose of the SLQ…
Anti ship missle defence
Does the SLQ-32 give you range? Why?
No it's a receiver. Depends on how far the radio waves travel
71 terms
CT
Picture element, box that holds bit da…
Picture elements in rows and columns,…
3 dimensional, adds the z dimension, d…
What controls the speed of the system
Pixel
Matrix
Voxel
System clock
Picture element, box that holds bit da…
Pixel
Picture elements in rows and columns,…
Matrix
24 terms
CT
CT
detector assembly
primary data
Computer uses ____ to compile and calc…
the process of creating a cross-sectional tomographic plane o…
Exit radiation measured by ____
Detector assembly sends this information, or ________ , to co…
algorithm
CT
the process of creating a cross-sectional tomographic plane o…
detector assembly
Exit radiation measured by ____
26 terms
CT
parenchymal cells
support cells
classes of support cells
ct consists of
main tissue function
provides structural scaffolding
Fibroblasts, Chondroblasts and Osteoblasts, Myofibroblasts, L…
Support cells... Produce abundant extracellular matrix that sepa…
parenchymal cells
main tissue function
support cells
provides structural scaffolding
CT
Lipopolysaccharide
Gamma interferon
IL-1, TNF, GM-CSF
Neutrophil
Gram - bacteria
T lymphocytes
Secretory products of macrophage
Sites of inflammation
Lipopolysaccharide
Gram - bacteria
Gamma interferon
T lymphocytes
59 terms
CT
conventional tomography
Hounsfield
Algorithm
512x512
the plane of the image is parallel to the long axis of the body
referred as CT numbers
Mathematical formula used to carry out complex calculations r…
matrix individual cell of formation
conventional tomography
the plane of the image is parallel to the long axis of the body
Hounsfield
referred as CT numbers
473 terms
CT
what is the "interscan delay"
what is clustered
what are axial scanning and gapped ima…
what is the disadvantage to axial
the pause the scan has while the table moves to the next slice
group of slices scanned together in a single breath hold
gapped means it is continuous and its a general scanning of t…
more dose and the delay between scans (times contrast injecti…
what is the "interscan delay"
the pause the scan has while the table moves to the next slice
what is clustered
group of slices scanned together in a single breath hold
27 terms
CT
everywhere
Bind, support, protect, framework, fil…
Fibroblast
macrophages
where are connective tissues found in the body?
Nine functions of C.T.
...
...
everywhere
where are connective tissues found in the body?
Bind, support, protect, framework, fil…
Nine functions of C.T.
27 terms
CT
Intro stuff and other basic story stuff
Knight
Squire
Yeoman
-going to Thomas Beckett's grave... -Spring... -all telling stories…
-modest cause he does not wear his armor
-knight's son... -young hoe
-face is like a nut... -proper forester... -bow and arrow
Intro stuff and other basic story stuff
-going to Thomas Beckett's grave... -Spring... -all telling stories…
Knight
-modest cause he does not wear his armor
9 terms
CT
Areolar CT
Recticular CT
Hyaline Cartilage
Fibro cartilage
Binds organs together. Holds tissue fluids.found beneath skin…
Supports and found in walls of liver, spleen, & lymphatic org…
Found at ends of bones, nose and ring.Supports protects/provi…
Supports protects and absorbs shock. Found between bony parts…
Areolar CT
Binds organs together. Holds tissue fluids.found beneath skin…
Recticular CT
Supports and found in walls of liver, spleen, & lymphatic org…
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