Boot Camp Medical Students CT scan

Uncategorized

Approach to CHF on the CXR

Believer in Perspectivism

Mother in Law Rosalie Fisher – Physicist

Looking at the the Pixel/Voxel from Many Angles

Scanner – 256 rows of detectors
8 centimeters of coverage, with the entire heart covered in two scans The rotation speed is 0.27 seconds (total .54 seconds with 120 kw of power.
Now available 640 rows and in .27 secs we scan the whole heart in one rotation
Ashley Davidoff thecommonvein.net

What are you curious about CT of the Chest?

NOTES – Anatomy

Overview of the Anatomy of the Lungs

SCALES

Search Pattern

MUSIC

You have to decide

Parts

S – Size
S – Shape
P = Position
C – Character
T-Time

Density (Approximate)

It is a scale from black to white of 4096 values and ranges from -1024 HU to 3071 HU

Pure Air –?1000 HU

Lungs about -700 to -800HU

Fat about -100HU

Pure Water = 0HU

Physiological fluid 10-18HU

Soft Tissue – 40-70 HU

Bone 2000 HU for very dense bone

Windows

preset windows

optimize visibility of certain structures or abnormalities of interest.

window width

Range of CT numbers that an image contains.
Wide window width (2000 HU)
Narrow Window Width (1000 HU),

window level aka window center
is the midpoint of the range of the CT numbers displayed
set to the tissue bein explored.

Lung windows typically have a

wide window width = lots of grays
1000 to 1500 HU.
a window level
-600 to -700 Hounsfield units (HU)

Soft Tissue Windows

window width
- 200 – 400 HU
window level
- 50 HU

Others

head and neck
- brain W:80 L:40
- subdural W:130-300 L:50-100
- stroke W:8 L:32 or W:40 L:40 ³
- temporal bones W:2800 L:600 or W:4000 L:700
- soft tissues: W:350?400 L:20?60 ⁴
chest
- lungs W:1500 L:-600
- mediastinum W:350 L:50
abdomen
- soft tissues W:400 L:50
- liver W:150 L:30
spine
- soft tissues W:250 L:50
- bone W:1800 L:400

Key Words	TCV Links	WF
secondary lobule	TCV	TCV WF
small airways Small airways disease	TCV
air bronchogram	TCV
bulla	TCV
congestive heart failure (CHF)	TCV 246Lu
consolidation	TCV WF	TCV WF
empyema	TCV faces
nodules	TCV Map
ground glass	TCV
ground glass opacity (GGO)	TCV 046Lu COVID	TCV WF
atelectasis	TCV
bronchiectasis	TCV faces
bronchiolitis		TCV
mass cavitating	TCV faces
effusion pleural	TCV faces
pleural thickening and calcifications (asbestos exposure)	TCv 240Lu
pneumomediastinum	TCV 217Lu
pneumothorax	TCV Faces
pneumothorax tension	TCV Faces
pulmonary hypertension	TCV	TCV
small airways disease Small airways disease	TCV faces
mass lung mass	TCV faces
tree-in-bud appearance	TCV Faces

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Key Words
TCV Links
WF




secondary lobule
TCV
TCV WF


small airways
Small airways disease
TCV
 


air bronchogram
TCV
 


bulla
TCV
 


congestive heart failure (CHF)
TCV 246Lu
 


consolidation
TCV WF
TCV WF


empyema
TCV faces
 


nodules
TCV Map
 


ground glass
TCV
 


ground glass opacity (GGO)
TCV 046Lu COVID
TCV WF


atelectasis
TCV
 


bronchiectasis
TCV faces
 


bronchiolitis
 
TCV


mass cavitating
TCV faces
 


effusion pleural
TCV faces
 


pleural thickening and calcifications (asbestos exposure)
TCv 240Lu
 


pneumomediastinum
TCV 217Lu
 


pneumothorax
TCV Faces
 


pneumothorax tension
TCV Faces
 


pulmonary hypertension
TCV
TCV


small airways disease
Small airways disease
TCV faces
 


mass lung mass
TCV faces
 


tree-in-bud appearance
TCV Faces





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Key Words
TCV Links
WF




secondary lobule
TCV
TCV WF


small airways
Small airways disease
TCV
 


air bronchogram
TCV
 


bulla
TCV
 


congestive heart failure (CHF)
TCV 246Lu
 


consolidation
TCV WF
TCV WF


empyema
TCV faces
 


nodules
TCV Map
 


ground glass
TCV
 


ground glass opacity (GGO)
TCV 046Lu COVID
TCV WF


atelectasis
TCV
 


bronchiectasis
TCV faces
 


bronchiolitis
 
TCV


mass cavitating
TCV faces
 


effusion pleural
TCV faces
 


pleural thickening and calcifications (asbestos exposure)
TCv 240Lu
 


pneumomediastinum
TCV 217Lu
 


pneumothorax
TCV Faces
 


pneumothorax tension
TCV Faces
 


pulmonary hypertension
TCV
TCV


small airways disease
Small airways disease
TCV faces
 


mass lung mass
TCV faces
 


tree-in-bud appearance
TCV Faces





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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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    [nodeValue] => TCV WF
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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DOMElement Object
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    [nodeValue] => TCV
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    [baseURI] => 
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DOMElement Object
(
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    [nodeValue] => bulla
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    [namespaceURI] => 
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    [baseURI] => 
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DOMElement Object
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    [baseURI] => 
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DOMElement Object
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    [nodeValue] => TCV
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    [ownerDocument] => (object value omitted)
    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
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)

DOMElement Object
(
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    [nodeValue] => air bronchogram
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    [namespaceURI] => 
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    [localName] => td
    [baseURI] => 
    [textContent] => air bronchogram
)

DOMElement Object
(
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    [nodeValue] =>  
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    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
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)

DOMElement Object
(
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    [nodeValue] => TCV
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    [ownerDocument] => (object value omitted)
    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
    [textContent] => TCV
)

DOMElement Object
(
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    [nodeName] => td
    [nodeValue] => small airways
Small airways disease
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    [ownerDocument] => (object value omitted)
    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
    [textContent] => small airways
Small airways disease
)

DOMElement Object
(
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    [nodeValue] => TCV WF
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    [parentNode] => (object value omitted)
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    [attributes] => (object value omitted)
    [ownerDocument] => (object value omitted)
    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
    [textContent] => TCV WF
)

DOMElement Object
(
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    [nodeName] => td
    [nodeValue] => TCV
    [nodeType] => 1
    [parentNode] => (object value omitted)
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    [attributes] => (object value omitted)
    [ownerDocument] => (object value omitted)
    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
    [textContent] => TCV
)

DOMElement Object
(
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    [nodeName] => td
    [nodeValue] => secondary lobule
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    [namespaceURI] => 
    [prefix] => 
    [localName] => td
    [baseURI] => 
    [textContent] => secondary lobule
)