HUMB2009 Lecture Notes - Lecture 5: Cavitation, Congenital Disorder, Atelectasis
5 Aug 2018
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Quick over view of the lung low dose fast. Lateral views give extra detail which is hidden in. Ap by the heart. soft tissue display lung display. Iv contrast (vessels): nodules indicate benign or malignant. Dual energy ct: study of bone and lung tissue. Is the disease getting out from lung and spreading towards the neck. Definition: visualisation of air-filled bronchi within background of opacified lung parenchyma. Bronchi not normally visible in outer 1/3 of lung: architectural distortion. Abnormal displacement of bronchi, vessels, fissures, or septa secondary to diffuse or localised retractile fibrosis. Gas-containing space; manifests as lucency or low attenuation within nodule, mass, or consolidation. Implies pulmonary necrosis with expulsion of necrotic material via tracheobronchial communication: ground-glass attenuation/opacity. Result from alveolar filling/collapse, oedema, blood, tumour, lipoprotein: centrilobular nodules and branching opacities that resemble budding tree. Definition: crescent-shaped or circumferential radiolucency surrounding nodule or mass. Synonyms: meniscus sign, monod sign (typically used for fungus ball/mycetoma/aspergilloma): rigler sign.
