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Consolidation is a clinical term for solidification into a firm dense mass. [See corresponding lexical definition[1] in National Library of Medicine's MedlinePlus Dictionary powered by Merriam-Webster (M-W) Online.] It is usually applied to a condition marked by induration[2] (swelling or hardening of normally soft tissue) of a normally aerated lung through accumulation of inflammatory cellular exudate in the alveoli and adjoining ducts. Consolidated tissue is radio-opaque, so that it is clearly demonstrable in X-rays and CT (computerized tomography) scans. [The clinically-oriented reader is directed to a PubMed search[3] for scholarly reviews on pulmonary consolidation in different diseases.] Consolidation is often a middle-to-late stage feature/complication in pulmonary infections[3]. Image File history File links Broom_icon. ... Respiratory system The lungs flank the heart and great vessels in the chest cavity. ... The alveoli (singular:alveolus), tiny hollow sacs which are continuous with the airways, are the sites of gas exchange with the blood. ... In the NATO phonetic alphabet, X-ray represents the letter X. An X-ray picture (radiograph) taken by Röntgen An X-ray is a form of electromagnetic radiation with a wavelength approximately in the range of 5 pm to 10 nanometers (corresponding to frequencies in the range 30 PHz... CAT apparatus in a hospital Computed axial tomography (CAT), computer-assisted tomography, computed tomography, CT, or body section roentgenography is the process of using digital processing to generate a three-dimensional image of the internals of an object from a large series of two-dimensional X-ray images taken around... The heart and lungs (from an older edition of Grays Anatomy) The lung is an organ belonging to the respiratory system and interfacing to the circulatory system of air-breathing vertebrates. ...