What causes a silhouette sign?
In radiology, the silhouette sign refers to the loss of normal borders between thoracic structures. It is usually caused by an intrathoracic radiopaque mass that touches the border of the heart or aorta.
Is silhouette sign normal?
The silhouette sign Normal adjacent anatomical structures of differing densities form a crisp contour or ‘silhouette’. Loss of a specific contour can help determine the position of a disease process. This phenomenon is known as the silhouette sign.
What does opacities in the lung mean?
Pulmonary opacification represents the result of a decrease in the ratio of gas to soft tissue (blood, lung parenchyma and stroma) in the lung. When reviewing an area of increased attenuation (opacification) on a chest radiograph or CT it is vital to determine where the opacification is.
What causes opacification of lung?
The opacification is caused by fluid or solid material within the airways that causes a difference in the relative attenuation of the lung: transudate, e.g. pulmonary edema secondary to heart failure. pus, e.g. bacterial pneumonia. blood, e.g. pulmonary hemorrhage.
What is lingula?
The term lingula refers to the tip or tongue-like projection of the upper lobe of the left lung but in general it is considered also to be the entire portion of this segment which is supplied by the first segmental bronchus that arises from the upper lobe bronchus.
What is the spine sign?
The thoracic spine sign, or spine sign, on lung ultrasound is an indirect indicator of the presence of a pleural effusion or hemothorax. It represents the visualization of the vertebral bodies in the thoracic cavity above the diaphragm which are usually not seen unless there is a fluid collection.
What is SAIL sign on chest xray?
On a chest X-ray, the sail sign is a radiologic sign that suggests left lower lobe collapse. In children, however, a sail sign could be normal, reflecting the shadow of the thymus. The thymic sail sign or spinnaker-sail sign is due to elevation of the thymic lobes in the setting of pneumomediastinum.
What is meniscus sign?
The meniscus sign refers to the intradural filling defect which is outlined by the sharp meniscus of intrathecal contrast due to blockage of subarachnoid space by an intradural lesion. The CSF above the blocked segment remains unopacified.
What is patchy pneumonitis?
Pneumonitis occurs when an irritating substance causes the tiny air sacs (alveoli) in your lungs to become inflamed. This inflammation makes it difficult for oxygen to pass through the alveoli into the bloodstream. Many irritants, ranging from airborne molds to chemotherapy drugs, have been linked to pneumonitis.
Does opacity mean pneumonia?
Multifocal ill-defined opacities most often result from multiple consolidations but must be distinguished from invasive or hemorrhagic tumors. This is not a common appearance for community-acquired pneumonia, but when it occurs this appearance indicates a serious infection that is likely caused by a virulent organism.
What are Bibasilar opacities?
Bibasilar atelectasis is a condition that happens when you have a partial collapse of your lungs. This type of collapse is caused when the small air sacs in your lungs deflate. These small air sacs are called alveoli. Bibasilar atelectasis specifically refers to the collapse of the lower sections of your lungs.
What is inferior lingula?
With the superior lingular bronchopulmonary segment, the inferior segment constitutes the other half of the lingula of the lung. Medially, the inferior lingular segments forms the part of the mediastinal surface of the left lung that is the cardiac impression; this sits directly lateral to the left side of the heart.
What is the anatomy of diaphragm pain?
Anatomy of diaphragm pain. The muscles of the diaphragm originate along the lumbar vertebra of the spine (lower back area), the inferior border of the ribs (at the 6th rib level) and sternum (breastbone). An opening exists in the middle portion of the diaphragm to for structures such as the esophagus, the descending aorta,…
What does it mean when your diaphragm hurts after surgery?
It then rests in its normal dome-shaped position until another breath is taken. Diaphragm muscle pain can be a symptom of many different medical problems and is a common complication during surgical procedures. However, in many cases, pain in the diaphragm is unknown.
Why does my diaphragm hurt when I run?
Your diaphragm can spasm when you breathe hard during strenuous exercise, like running, which can cause pain in your sides. The pain can be sharp or very tight. It restricts breathing and prevents you from drawing a full breath without discomfort.
What are the symptoms of a spasm in the diaphragm?
Here are some of them. Your diaphragm can spasm when you breathe hard during strenuous exercise, like running, which can cause pain in your sides. The pain can be sharp or very tight.