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CT Imaging Procedures > Thoracic Imaging (15) > Flashcards

Thoracic Imaging (15) Flashcards

1
Q

CT Chest: Indications (4)

A

Trauma
Cancer
Hilar Adenopathy
General Survey
Etc.
NOT Vascular imaging (need CTA)
NOT lung Ds (high res preferred)

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2
Q

CT Chest: Scan Type

A

Helical

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3
Q

CT Chest: Slice Parameters

A

5mm w matching interval

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4
Q

CT Chest: Gantry Tilt

A

None

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5
Q

CT Chest: Contrast
Volume
Rate
Timing

A

100 mL
3mL/sec
30 sec delay

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6
Q

CT Chest: Algorithm

A

Standard: 400/40
Lung: 1800/-600

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7
Q

CT Chest: Reformation

A

Coronal from thinnest data set

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8
Q

CT Chest: FOV

A

Must include both adrenals

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9
Q

CT Chest: NonCon Indications when contrast contraindicated

A

Effusion
Pneumothorax
Hemothorax
Etc.

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10
Q

Atelectasis

A

Collapsed lung

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11
Q

CT Chest: Smoothing Algorithms

A

Used for most soft tissues–including structures of mediastiunm: decreases spatial resolution, but also image noise

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12
Q

CT Chest: Utility of 1800WW

A

decrease contrast of images
increase visibility of lung markings

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13
Q

CT Chest: Utility of Contrast for COPD

A

Unnecessary: COPD blebs enhance readily under 1800/-600 algorithm

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14
Q

CT Chest: Utility of Contrast for Tumor Borders (2)

A

Visibility of tumors greatly enhanced
Can aid in discerning borders tumor vs effusions

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15
Q

HRCT Chest: Indications

A

Interstitial lung disease
COPD
Emphysema

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16
Q

HRCT Chest: Scan Type

A

Axial for increased spatial resolution

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17
Q

HRCT Chest: Slice Parameters

A

1.25mm thickness/10-20mm interval
(survey of lung tissue, so significant gaps in the image data is allowed)

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18
Q

HRCT Chest: Gantry Tilt

A

None

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19
Q

HRCT Chest: Contrast

A

None

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20
Q

HRCT Chest: Algorithm

A

Lung 1800/-600
(or Bone)

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21
Q

HRCT Chest: Required Series (3)

A

Supine-Inspiration
Supine-Expiration
Prone-Inspiration

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22
Q

HRCT Chest: Purpose
(Not indicated for)

A

Provide high-res images of lungs (not heart/vasculature)

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23
Q

CTA Chest-PE: Frequency

A

Among most commonly performed CTs

24
Q

CTA Chest-PE: Indications (4)

A

(If MI already excluded)
Pain
SOB
+ D-dimer(blood clot test)
Recent Surgery

25
Q

CTA Chest-PE: Scan Type

A

Helical

26
Q

CTA Chest-PE: Slice Parameters

A

2.5mm w matching interval

27
Q

CTA Chest-PE: Gantry Tilt

A

None

28
Q

CTA Chest-PE: Contrast
Volume
Timing
Rate

A

100-150 IV using bolus tracking @ 4+ mL/sec

29
Q

CTA Chest-PE: Algorithm

A

Standart: 400/40
Lung: 1800/-600

30
Q

CTA Chest-PE: Reformation

A

Coronal

31
Q

CTA Chest-PE: FOV

A

To include both adrenals

32
Q

CTA Chest-PE: Bolus Tracking ROI (2 options)

A

Pulmonary trunk (bifurcation occurs at the level of the carina)
Left atrium (allows contrast to fully circulate through heart before scan initiated)

33
Q

CTA Chest-PE: Common Outcomes of + CT (2)

A

Pneumonia
Infarction
(both d/t reduced circulation thru parenchyma)

34
Q

Controls level of edge-enhancement (sharpness)

A

Reconstruction Algorithm

35
Q

Controls the brightness/contrast of images

A

Windowing Technique

36
Q

Special kind of Beam-Hardening that occurs at the interface of high-density contrast & low-density tissues (e.g., lungs)

A

Edge-Gradient Artifact

37
Q

CTA CHEST-Thoracic Aorta: ROI

A

Descending Aorta (peak enhancement of aorta is generally a few sec after peak enhancement of pulmonary aa.)

38
Q

CTA CHEST-Thoracic Aorta: Indications (4)

A

Aneurysm
Sx of aneurysm:
Pressure Changes
SOB
Chest/Back Pn

39
Q

CTA CHEST-Thoracic Aorta: Scan Type

A

Helical

40
Q

CTA CHEST-Thoracic Aorta: Slice Parameters

A

2.5mm w matching interval

41
Q

CTA CHEST-Thoracic Aorta: Gantry Tilt

A

None

42
Q

CTA CHEST-Thoracic Aorta: Contrast
Volume
Timing
Rate
Direction

A

100-150 mL IV
Bolus tracking
4ml/sec
Superior–>Inferior

43
Q

CTA CHEST-Thoracic Aorta: Algorithm

A

Standard: 400/40
Lung: 1800/-600

44
Q

CTA CHEST-Thoracic Aorta: Reformations

A

Coronal

45
Q

CTA CHEST-Thoracic Aorta: FOV

A

Include both adrenals

46
Q

Aneurysm

A

Abnormal enlargement of vessel

47
Q

Dissection

A

Tear in arterial wall creating 2 channels through the vessel

48
Q

thrombi that form and adhere on the inner wall of a large blood vessel or heart chamber

A

Mural Thrombosis

49
Q

Build up of fluid between the layers of tissue that line the lungs and chest cavity

A

Effusion HU >15

50
Q

Collection of air outside the lung but within the plural cavity

A

Pneumothorax

51
Q

Collection of blood in the space between the chest wall and the lung

A

Hemothorax

52
Q

Commonly precedes HRCT

A

Chest routine WO

53
Q

Effusion HU

A

> 15

54
Q

Lung consolidation is when the

A

air in the small airways of the lungs is replaced with a fluid, solid, or other material such as pus, blood, water, stomach contents, or cells

55
Q

CTA CHEST-Thoracic Aorta: Intimal Flap

A

In dissected aorta: separates true lumen from false lumen

56
Q

HRCT Chest: Utility of Bone Algorithm

A

Offers highest level of edge-enhancement and therefore spatial resolution

CT Imaging Procedures (11 decks)

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