title: Scintigraphic appearances in patients with pulmonary infection and lung scintigrams of intermediate or low probability for pulmonary embolism.
abstract: Out of 294 patients with lung scintigrams of low or intermediate probability for pulmonary embolism, the appearances in 54 patients with a final diagnosis of pulmonary infection were reviewed. The most common finding was a matched defect in ventilation and perfusion occurring in 40 patients (76%). Regional reverse mismatch occurred in 13 patients (24%) and both appearances were found in one patient (2%). Reverse mismatch was also present in a further seven patients, four of whom had bronchial obstruction. Although occurring less frequently than matched defects, 81% of regional reverse mismatched defects were because of chest infection. The presence of regional reverse mismatch in patients investigated for pulmonary embolism suggests the alternative diagnosis of chest infection.
authors.affiliation: Department of Nuclear Medicine, Addenbrooke's Hospital, Cambridge, England.
authors.forename: D J
authors.initials: DJ
authors.lastname: Li
authors.forename: I
authors.initials: I
authors.lastname: Stewart
authors.forename: K A
authors.initials: KA
authors.lastname: Miles
authors.forename: E P
authors.initials: EP
authors.lastname: Wraight
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging; D011014:Pneumonia / Q000000981:diagnostic imaging; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging*; D011877:Radionuclide Imaging; D012141:Respiratory Tract Infections / Q000000981:diagnostic imaging*; D013668:Technetium Tc 99m Aggregated Albumin; D016284:Technetium Tc 99m Pentetate; D014692:Ventilation-Perfusion Ratio
chemical_list: D013668:Technetium Tc 99m Aggregated Albumin; D016284:Technetium Tc 99m Pentetate