CT chest Flashcards
1
Q
CT general chest technique
A
- supine, chin up to avoid artefact
- arrested inspiration
- high resolution algorithm to see lung tissue
- standard algorithm to see mediastinum
- approv 35cm RFOV
- apices to posterior costophrenic angles
1
Q
HRCT volume acquisition
A
- 1mm/1mm axial
- 5mm/5mm coronal
- sharp algorithm
- one breath hold (6-8 secs)
2
Q
HRCT compared to conventional CT
A
- optomised spatial resolution
- higher dose
- partial volume effects reduced
3
Q
what is ILD
A
- interstitial lung disease
- group of lung disorders that affect interstitium
4
Q
what is HRCT
A
high resolution CT
- used to obtain detailed and fine images of chest and particularly lungs
5
Q
technique for HRCT scanning of chest
A
uses thinner slices (1mm) and higher resolution
6
Q
what is HRCT well suited for
A
- assessing lung tissue and detecting subtle abnormalities
- smaller RFOV
7
Q
indications needed for HRCT
A
- evaluation of lung diseases
- assessment of airway diseases
- vascular abnormalities
- assessment of chest trauma
8
Q
interstitial lung disease
A
group of lung disorders that affect interstitium (tissue surrounding and supporting alveoli
9
Q
kV for HRCT
A
140 kV
10
Q
mA for HRCT
A
100 mA
11
Q
contrast for chest ONLY
A
70ml
300mgl/ml at 3 ml/s
30 and 70 second delay
