title: CT manifestations of radiation-induced change in chest tissue.
abstract: The computed tomographic appearance of acute and chronic radiation change in the thorax is described. Acute radiation pneumonitis demonstrates patchy, confluent regions of increased pulmonary attenuation. Chronic changes include soft tissue density fibrotic changes that blend smoothly with the pleural surfaces and adjacent mediastinal structures. Also seen are bronchiectatic changes and distortion of normal intrathoracic anatomic relationships. Both the acute and chronic changes usually make linear lateral margins with adjacent aerated lung. Development of a discrete mass or focal cavitation after the radiation changes have become stable is suspect for recurrent tumor or infection.
mesh_terms: D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use; D002277:Carcinoma / Q000188:drug therapy / Q000532:radiotherapy*; D006689:Hodgkin Disease / Q000188:drug therapy / Q000532:radiotherapy*; D006801:Humans; D008168:Lung / Q000528:radiation effects; D008175:Lung Neoplasms / Q000188:drug therapy / Q000532:radiotherapy*; D008875:Middle Aged; D011014:Pneumonia / Q000209:etiology; D011832:Radiation Injuries / Q000000981:diagnostic imaging*; D011879:Radiotherapy Dosage; D013997:Time Factors; D014057:Tomography, X-Ray Computed
chemical_list: D000970:Antineoplastic Agents