Imaging the normal and abnormal lung Flashcards
What are the strengths of radiography?
Great spatial resolution- especially bone
Cheap & available
Easy interpretation
What are the weaknesses of radiography?
Projectional
Ionising radiation
Very limited soft tissue visualisation
What are the 4 tissues you can differentiate on radiography?
Air / gas
Fat
Water / soft tissue - all body fluids and tissues except fat and bone
High atomic number calcium iodine barium metals
Can you see blood vessels in a lung?
Can you see airways in a lung?
Yes
No
What are the strengths of CT?
Cross-sectional
Spatial resolution
Widely available
Weaknesses
Why is CT better than x-ray of the lungs?
Shows greater detail
Resolve small structures
Resolve small differences in attenuation
What are the weaknesses of CT?
Ionising radiation
Limited soft tissue contrast
How can HRCT be generated?
High resolution CT -
Slice thickness
Resolution
Thin section (1mm) is the optimal technique for demonstrating lung
CT thorax 5mm slice thickness
What imaging technique is this?
HRCT
What imaging technique is this?
HRCT
Label the diagram.
There is a tumour as one of the labels
Intravenous contrast white in superior vena cava (1)and grey in ascending 2 and descening 3 aorta and the pulmonary arteries4.. There is a tumour 5 of soft tissue density
Label the lobes
Superior
Middle
Inferior
What does this show?
Right upper lobe collapse
Normally horizontal fissure runs horizontally to the hilum but the upper right lobe has collapsed
Has lost volume so collapsed upwards and medially towards spine - pulled horizontal fissure up with it
The primary pulmonary lobule and acinus ______mm
Secondary pulmonary lobule _______mm diam is the functional unit of the lung.
______ alveoli per adult – total area 143m2
6-10
5-20
300 million