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A lung nodule or pulmonary nodule is a relatively small focal density in the lung. A solitary pulmonary nodule (SPN) or coin lesion, [1] is a mass in the lung smaller than three centimeters in diameter. A pulmonary micronodule has a diameter of less than three millimetres. [2] There may also be multiple nodules. One or more lung nodules can be ...
The nodules have an indolent pattern of growth and are found throughout the lungs. The nodules are typically rounded and well-defined. Upon surgical resection, histologically the nodules are found to be typical carcinoids or carcinoid tumorlets depending on size. [citation needed]
Lung volumes and lung capacities are measures of the volume of air in the lungs at different phases of the respiratory cycle. The average total lung capacity of an adult human male is about 6 litres of air. [1] Tidal breathing is normal, resting breathing; the tidal volume is the volume of air that is inhaled or exhaled in only a single such ...
English: Original caption: Complex lesion in the right upper lobe in a 61-year heavy smoker. Axial CT-image in lung window setting shows a 2.6 cm lesion with spiculated morphology, pleural tags and centrally small lucent foci, corresponding to the so-called “bubble-like-lucencies”.
MIP enhances the 3D nature of these nodules, making them stand out from pulmonary bronchi and vasculature. MIP imaging is also used routinely by physicians in interpreting Positron Emission Tomography (PET) or Magnetic Resonance Angiography studies.
The nodules in the lung typically occur bilaterally and peripherally, on a background of simple coal workers' pneumoconiosis. There are usually multiple nodules, varying in size from 0.5 to 5.0 cm. The nodules typically appear rapidly, often in only a few weeks. Nodules may grow, remain unchanged in size, resolve, or disappear and then reappear.