Page 1 of 9: Library: Image gallery: Medicine Slides Collection by Nadu

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Hi friends,

Its true that visual impression is better than listening..............

So here r some..........

Others can also contribute ...........

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Hydatidiform mole on USG :

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Chest radiography demonstrates linear opacities which may form parallel "tram lines" and are the result of central bronchiectasis.

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The chest radiograph usually demonstrates bilateral symmetric perihilar opacity ("bat wing" distribution) in PULMONARY ALVEOLAR PROTIENOSIS.

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CXR FINDINGS OF PULMONARY EMBOLUS :

Pleural based opacities with convex medial margins are also known as a Hampton's Hump

A Westermark's sign implies an area of decreased vascularity and perfusion accompanied by an enlarged central pulmonary artery on the affected side.

The central pulmonary arteries may be prominent either from pulmonary hypertension or the presence of clot in those arteries (a/k/a PALLA'S SIGN )

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S Curve of Golden

When there is a mass adjacent to a fissure, the fissure takes the shape of an "S". The proximal convexity is due to a mass, and the distal concavity is due to atelectasis. Note the shape of the transverse fissure.

This example represents a RUL mass with atelectasis.

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Silhouette Sign

Cardiac margins are clearly seen because there is contrast between the fluid density of the heart and the adjacent air filled alveoli. Both being of fluid density, you cannot visualize the partition of the right and left ventricle because there is no contrast between them. If the adjacent lung is devoid of air, the clarity of the silhouette will be lost. The silhouette sign is extremely useful in localizing lung lesions.

To utilize the silhouette sign you must know what structures are adjacent to each silhouette.

Silhouette Adjacent Lobe/Segment

Right diaphragm RLL/Basal segments
Right heart margin RML/Medial segment
Ascending aorta RUL/Anterior segment
Aortic knob LUL/Posterior segment
Left heart margin Lingula/Inferior segment
Descending aorta LLL/Superior and medial segments
Left diaphragm LLL/Basal segments

You should know that the pleura encircles the lung and diseases of the pleura can also obliterate silhouettes. The same is true for mediastinal masses.

A: Ascending aorta

B: Left heart margin

C: Left diaphragm

D: Aortic knob

E: Right heart margin

F: Right diaphragm

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Pulmonary Artery Overlay Sign

This is the same concept as a silhouette sign. If you can recognize the interlobar pulmonary artery, it means that the mass seen is either in front of or behind it.

This is an example of a dissecting aneurysm.

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Mogul Sign

Note the post-stenotic dilatation in the coarctation aorta giving the appearance of a ski mogul.

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Halo Sign

In a cavity with a fungus ball, there is a crescentic lucent space along the upper portion of the density giving the appearance of a halo.

This phenomenon is seen with two clinical presentations of pulmonary aspergillosis:
1. Necrotizing subacute pneumonia during recovery phase from leukopenic episodes
2.fungus ball (as in this case )

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