Radiology of chest diseases

Chest radiograph
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AP chest x-rays are harder to read than PA x-rays and are therefore generally reserved for situations where it is difficult for the patient to get an ordinary chest x-ray, such as when the patient is bedridden. In this situation, mobile X-ray equipment is used to obtain a lying down chest x-ray known as a "supine film".

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As a result, most supine films are also AP. Lateral views of the chest are obtained in a similar fashion as the posteroanterior views, except in the lateral view, the patient stands with both arms raised and the left side of the chest pressed against a flat surface.

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Required projections can vary by country and hospital, although an erect posteroanterior PA projection is typically the first preference. If this is not possible, then an anteroposterior view will be taken. Further imaging depends on local protocols which is dependent on the hospital protocols, the availability of other imaging modalities and the preference of the image interpreter. In the UK, the standard chest radiography protocol is to take an erect posteroanterior view only, and a lateral one only on request by a radiologist.

Special projections include an AP in cases where the image needs to be obtained stat and with a portable device, particularly when a patient cannot be safely positioned upright. Lateral decubitus may be used for visualization of air-fluid levels if an upright image cannot be obtained. Anteroposterior AP Axial Lordotic projects the clavicles above the lung fields, allowing better visualization of the apices which is extremely useful when looking for evidence of primary tuberculosis.

In the average person, the diaphragm should be intersected by the 5th to 7th anterior ribs at the mid-clavicular line, and 9 to 10 posterior ribs should be viewable on a normal PA inspiratory film. An increase in the number of viewable ribs implies hyperinflation, as can occur, for example, with obstructive lung disease or foreign body aspiration. A decrease implies hypoventilation, as can occur with restrictive lung disease , pleural effusions or atelectasis. Underexpansion can also cause interstitial markings due to parenchymal crowding, which can mimic the appearance of interstitial lung disease.

Appropriate penetration of the film can be assessed by faint visualization of the thoracic spines and lung markings behind the heart. The right diaphragm is usually higher than the left, with the liver being situated beneath it in the abdomen. The minor fissure can sometimes be seen on the right as a thin horizontal line at the level of the fifth or sixth rib. Splaying of the carina can also suggest a tumor or process in the middle mediastinum or enlargement of the left atrium , with a normal angle of approximately 60 degrees.

Localization of lesions or inflammatory and infectious processes can be difficult to discern on chest radiograph, but can be inferenced by silhouetting and the hilum overlay sign with adjacent structures. If either hemidiaphragm is blurred, for example, this suggests the lesion to be from the corresponding lower lobe. If the right heart border is blurred, than the pathology is likely in the right middle lobe, though a cavum deformity can also blur the right heard border due to indentation of the adjacent sternum.

If the left heart border is blurred, this implies a process at the lingula. Fluid in space between the lung and the chest wall is termed a pleural effusion.

There needs to be at least 75 mL of pleural fluid in order to blunt the costophrenic angle on the lateral chest radiograph, and mL on the posteroanterior chest radiograph. On a lateral decubitus, amounts as small as 50ml of fluid are possible. Pleural effusions typically have a meniscus visible on an erect chest radiograph, but loculated effusions as occur with an empyema may have a lenticular shape the fluid making an obtuse angle with the chest wall.

Pleural thickening may cause blunting of the costophrenic angle, but is distinguished from pleural fluid by the fact that it occurs as a linear shadow ascending vertically and clinging to the ribs. Chest Notes Short Articles. Chest Images Chest Photos. Chest Flashcards Study Aids. Chest Archives Chest Cases of the Week.

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This fully revised and expanded third edition covers all aspects of modern thoracic radiology, and includes important new sections on computer tomographic. Radiology of Chest Diseases [Sebastian Lange] on *FREE* shipping on qualifying offers. This fully revised and expanded third edition covers all.

ICU Radiology. Adenomas cylindromas. Lipoid Pneumonia. Lung Masses. Allergic Pneumonitis. Alveolar Cell Carcinoma. Aortic Dissection. Metastases to the Lung. Mycoplasma Pneumonia.


Neurogenic Tumors. Aspiration Pneumonia. Pancoast Tumor.

Pleural Effusion. Bronchogenic Cysts. Polyarteritis Nodosa. You may be asked to sign a consent form that gives permission to do the procedure. Read the form carefully and ask questions if anything is not clear. You usually do not need to stop eating or drinking before the test. You also usually will not need medicine to help you relax sedation.


Sometimes a follow-up exam is done because a potential abnormality needs further evaluation with additional views or a special imaging technique. Please note RadiologyInfo. As you can see, the GPU utilization of PyTorch right is always higher than Keras left for the same mini-batch size, with a notable drop on validation phase. Pneumonia and congestive heart failure are very commonly diagnosed by chest radiograph. Product Description. Pleural thickening may cause blunting of the costophrenic angle, but is distinguished from pleural fluid by the fact that it occurs as a linear shadow ascending vertically and clinging to the ribs. It also may be used to help diagnose and monitor treatment for a variety of lung conditions such as pneumonia, emphysema and cancer.

Wear clothing that you can easily take off. Or wear clothing that lets the radiologist reach your chest.

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You may have a chest X-ray as an outpatient or as part of your stay in a hospital. You will be asked to remove any clothing, jewelry, or other objects that may get in the way of the test.

Chest X-Ray - Lung disease

You may be asked to lie down, sit, or stand. Your position depends on what images the technologist needs. For a standing or sitting image, you will stand or sit in front of the X-ray plate. You will be asked to roll your shoulders forward, take in a deep breath, and hold it until the X-ray is made. If you are unable to hold your breath, the technologist will take the picture by watching how you breathe. You will need to stay still during the X-ray. Moving during the X-ray may affect the quality of the image. For a side-angle view of the chest, you will be asked to turn to your side and raise your arms above your head.

You will be told to take in a deep breath and hold it as the X-ray is made.