Signs of Lung and Lobar Collapse
Detecting signs of collapse within the lung is important in the diagnosis of lung disease. For us, it is also a good way to reinforce the anatomy. In general, the…
Patterns of Lung Disease
We have already seen how disease can consolidate or collapse a segment or lobe. We now look at other patterns of diffuse and focal lung disease. The lung reacts to…
The Air Bronchogram Sign
On the normal chest x-ray, we see air in the trachea and proximal bronchi because they are surrounded by the soft tissue (water density) of the mediastinum. In the lungs,…
Lobar Anatomy
A “fingertip” knowledge of lobar and segmental anatomy is indispensable for understanding patterns of lung collapse and patterns of lung disease. Some diseases have lobar or segmental distributions; others do…
The Silhouette Sign
If part of the lung is radiodense (alveolar pattern, consolidated, water density, airless), it can affect our ability to see adjacent structures. We can use these changes to help us…
The Normal Chest X-Ray: Reading Like the Pros
The keys to reading x-rays well are a good understanding of normal anatomy and an orderly search pattern. This chapter reacquaints you with the normal anatomy and helps you develop…
Understanding the Mediastinum
The mediastinum is the area between the right and left lungs, bounded by the medial-parietal pleura. Mediastinal diseases can be difficult to detect on chest x-ray because most diseases are…
The Radiographic Examination: The Basics
The chest x-ray and computed tomography (CT) are part of every physician’s practice. You should have a basic understanding of the anatomy and pathologic findings visible on these images. In…
Cross-Sectional Imaging Techniques
Three relatively recent imaging techniques, computed tomography (CT), ultrasound (US), and magnetic resonance imaging (MRI), have greatly improved thoracic imaging. In all conventional x-ray techniques, the x-ray beam passes through…
