1. CHRONIC BRONCHITIS:
Acute bronchitis does not show any X-ray findings.
Chronic bronchitis of 3 consecutive months for more than 2 years may show:
-Linear shadows become prominent.
-Small ill defined opacities anywhere in lung.
-Wide alteration in lung markings noted.
-Emphysematous changes seen.
It is commonest in lower zones of lings.
In many X-ray we may not find anything conclusive.
There may be patchy consolidations.
In some cases dilated bronchi filled with mucus may be visualised.
In many cases the actual wall of bronchi may be visible as thin parallel lines raditing outwards
In some terminal dilatation may be seen giving honeycomb appearance.
Secondary pneumonia may be seen.
Mediastinal glands do not enlarge.
3. PRIMARY CHILDHOOD TYPE OF TUBERCULOSIS:
Ghone focus is a pneumonic consolidation of few mm usually at periphery.
Lesion may undergo fibrosis and may calcify
Hilar lymph glands are enlarged.
It may produce pneumonia and consolidation.
It is single and homogeneous lesion.
Cavitation is rare.
Small pleural effusion may be noted.
4. CHRONIC PULMONARY TUBERCULOSIS.
More common type is motting of individual shadow of 1-5 mm diameter.Shadows do not coalesce and remain discrete.
Less commonly there may be isolated large opacities roughly circular 1/2 to 2 cm in diameter.
Occasionally lesion may appear as areas of homogeneous consolidation.
Mediastinal glandular enlargement does not occur.
Lung destruction heals by fibrosis.Emphysema may also be present.
Cavity may appear when homogeneous area of consolidation breaks down.Cavity appears in acute phase and inner margin is rough and irregular.
Tuberculous lesion often cavitate and many of them calcify.Calcified foci are irregular in size and shape and are grouped in clusters.
Calcification of tuberculous focus always implies some degree of healing but in some cases viable bacilli may be recovered.