Radiological Assessment of Obstructive and Restrictive Lung Diseases

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What is the characteristic feature of true bronchiectasis on CT?

External diameter of bronchus greater than diameter of accompanying artery

BA ratio > 1.5 (correct)

Internal diameter of bronchus equal to diameter of accompanying artery

BA ratio < 1.5

What is the characteristic radiological feature of asthma?

Cystic bronchiectasis

Hyperinflated lungs with flattened hemidiaphragms (correct)

Decreased lung volumes

Mosaic attenuation due to air trapping

What is the characteristic distribution of fibrosis in UIP pattern on HRCT?

Posterior and basal predominant

Central and anterior predominant

Peripheral and subpleural predominant (correct)

Upper lung zone predominant

What is the characteristic feature of NSIP on CT?

Subpleural sparing in lower lobes Signup and view all the answers

What is the characteristic radiological feature of cryptogenic organizing pneumonia?

Bilateral patchy peripheral consolidations and ground glass opacities Signup and view all the answers

What is the characteristic feature of sarcoidosis stage I?

Bilateral hilar lymphadenopathy Signup and view all the answers

What is the primary objective of this talk?

To differentiate a normal image from a diseased lung Signup and view all the answers

What is the main advantage of Chest Radiograph over CT?

Lower radiation dose Signup and view all the answers

What is the primary limitation of Chest Radiograph?

Hidden areas cannot be seen Signup and view all the answers

What is the characteristic of a honeycomb pattern on a HRCT scan?

Air-filled cystic appearing with thick walls, subpleural, and randomly distributed Signup and view all the answers

What is the term for the irregular bronchial dilatation caused by fibrosis?

Traction bronchiectasis Signup and view all the answers

What is the primary advantage of CT over Chest Radiograph?

Ability to reconstruct images in Sagittal and Coronal reformats Signup and view all the answers

What is the primary use of Serial Chest X-rays?

To monitor disease progression Signup and view all the answers

What is the characteristic of a ground-glass opacity on a HRCT scan?

Area of increased attenuation, with no obscuration of underlying vascular or bronchial markings Signup and view all the answers

What is the term for the permanent abnormal enlargement of airspaces distal to the terminal bronchiole?

Emphysema Signup and view all the answers

What is the level of anatomical detail provided by High Resolution Computed Tomography (HRCT)?

Similar to gross and pathological specimens Signup and view all the answers

What is the characteristic of a cyst on a HRCT scan?

Well-defined, round, thin-walled low attenuation space usually containing air Signup and view all the answers

What is the characteristic of a flattened hemidiaphragm on a chest X-ray?

Seen in obstructive lung diseases, such as emphysema Signup and view all the answers

What is the characteristic feature of Stage III pulmonary fibrosis?

Reticulations and honeycombing Signup and view all the answers

What is the typical distribution of micronodules in pulmonary fibrosis?

Upper lobe and parahilar predominant Signup and view all the answers

What is the characteristic feature of hypersensitivity pneumonitis on HRCT?

Ground glass and lobular areas of decreased attenuation Signup and view all the answers

What is the typical finding in asbestos-related lung disease?

Dense calcified pleural plaques Signup and view all the answers

What is the term for the irregular mass-like opacities seen in pulmonary fibrosis?

Mosaic perfusion Signup and view all the answers

What is the key to accurate diagnosis of pulmonary fibrosis?

Multi-disciplinary approach Signup and view all the answers