Download - Chest x ray interpretation
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Chest X-ray interpretationChest X-ray interpretation
Harindu Udapitiya,Temporary Lecturer,Division of Pharmacology.
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Overview
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Before interpreting……
1. Proper labelling
2. Proper positioning
3. Veiw-PA? AP? Lateral?
4. Exposure
5. Rotation
6. Adequacy of inspiratory effort
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Normal Anatomy
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Normal Chest X-ray
Cardiac Structures Position
More central in younger infants and children More on the L side in older infants and teens
Size The cardiothoracic ratio should be less than 0.5 A cardiothoracic ratio of greater than 0.5 (in a good
quality film) suggests cardiomegaly.
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A/B<0.5
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Cardiomegaly
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Trachea The trachea is placed usually just to the right of
the midline
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Mediastinum
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Lungs There are three lobes in the right lung and two in
the left. Right lung
1. Upper lobe
2. Middle lobe
3. Lower lobe.
Left lung1. Upper lobe; this contains the lingula
2. Lower lobe.
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Pleura There are two layers of pleura: the parietal
pleura and the visceral pleura. The parietal pleura lines the thoracic cage and
the visceral pleura surrounds the lung.
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Diaphragm Contour Rounded with sharp pointed costophrenic and
costocardiac angles. Blunting of costalphrenic or costocardiac angles suggests plueral effusion.
Right diaphragm is usually 1-2 cm higher
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Abnormal Chest X-ray
Radiopacity (whiteness) means increased density
Radiotranslucency (blackness) means decreased density
Radiopacity can be of 3 causes Alveolar pattern – fluffy, soft, poorly demarcated
opacifications < 1 cm in diameter Possible causes:
Pulmonary edema Viral pneumonia Pneumocystis Alveolar cell carcinoma
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Pneumonia
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Abnormal Chest X-ray
Interstitial pattern Consolidation of interstitial tissue (alveolar walls,
intralobular vessels, interlobar septa and connective tissue)
Looks like branching lines radiating toward the periphery of the lung
Possible causes: Interstitial pneumonitis Pulmonary fibrosis
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Pulmonary Fibrosis
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Abnormal Chest X-ray
Vascular pattern – assessment of the pulmonary arteries and capillaries If there is an increase in the size of the
pulmonary arteries as they extend out into the lung – pulmonary hypertension
If there is a decrease in size, truncation, or obliteration of a pulmonary artery – embolus
Lack of vascular making in the periphery - pneumothorax
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Pulmonary Hypertension
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Pulmonary Embolism
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Lung pathologies
White Lung field Black lung Field
Well defined
Ill defined
Collapse Pleural Effusion
Consolidation Fifrosis Pulmonary Edema Infiltration
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Pathological Conditions
1. Consolidation
2. Abscess
3. Bronchial Asthma
4. Bronchiectasis
5. COPD
6. Lung Collapse
7. Heart Failure
8. Pulmonary fibrosis
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9. Hiatus hernia
10. Pleural Effusion
11. Pneumothorax
12. TB
13. Carcinoma
14. Lymphoma
15. Pericardial Effusion
16. Mitral Stenosis
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17. ASD
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1.Consolidation
Causes Pneumonia Bronchial carcinoma Lymphoma Inflammatory conditions
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Radiological features Airbronchogram Silhouette sign Lower border
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R.Middle lobe Pneumonia
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R.Lower Lobe pneumonia
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2.Abscess
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3.Bronchial asthma
I. HyperinflationII. Diaphragmatic
flatteningIII. Bronchial wall
thickeningIV. Hilar
enlargement
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4.Bronchiectasis
I. Tram line opacification
II. “Bundle of graphes appearance”
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5.COPD
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7.Lung Collapse
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DDI. Lung collapse
II. Lower lobe consolidation
III. Pleural effusion
IV. Raised hemi diaphragm
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8.Pulmonary fibrosis
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9.Pleural Effusion
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10.Pneumothorax
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11.Hiatus hernia
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12.TB
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Miliary TB
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13.Bronchial carcinoma
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14.Lymphoma
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15.Pericardial effusion
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16.Mitral Stenosis
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17.ASD
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1.Basics on normal chest x ray 2.Basics on Abnormal chest x ray 3.Pathological conditions
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