title: Detection and quantification of the parenchymal abnormalities in emphysema using pulmo-CT.
abstract: We aimed to determine the degree and extent of parenchymal abnormalities on pulmo-CT in patients with emphysema. The study group consisted of 29 patients (18 male, 11 female; mean age 57.9+/-13). The diagnosis was based on clinical symptoms, pulmonary function tests (PFT) values, and chest CT findings. All of the patients CT scans were obtained during suspended deep inspiration from the apices to the costophrenic angles. The mean lung attenuation (MLD) and parenchymal abnormalities related to emphysema were quantitatively calculated with tables, histograms and graphics at the whole lung. The lung density measurements revealed a mean density of -898.48+/-51.37 HU in patients with emphysema and -825.1+/-25.5 HU in control group. In addition, mean percentage of subthreshold attenuation values was found as 12.03+/-15.75 and 1.07+/-0.83 in patients with emphysema and control group, respectively. Compared with control group, the patients with emphysema had a significantly lower inspiratory MLD (p<0.05). Additionally, statistically significant correlations were seen between the MLD and percentage of subthreshold values (r=0.44, p<0.05). In contrast, there was poor correlation between PFT measurements and the subthreshold values. In conclusion, pulmo-CT is a quick, simple method for quantitative confirmation of the presence of parenchymal abnormalities of lung as mosaic attenuation and should be used in combination with other radiological methods and PFT as it gives additional information to routine examinations in patients with emphysema.
authors: Trakya University School of Medicine, Radiology, Edirne, Turkey. osmantemizoz@gmail.com
authors: Osman
authors: O
authors: Temizoz
authors: Omer
authors: O
authors: Etlik
authors: Mehmet Emin
authors: ME
authors: Sakarya
authors: Kursat
authors: K
authors: Uzun
authors: Halil
authors: H
authors: Arslan
authors: Mustafa
authors: M
authors: Harman
authors: Mustafa Kemal
authors: MK
authors: Demir
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011656:Pulmonary Emphysema / Q000175:diagnosis / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D014057:Tomography, X-Ray Computed; D014421:Turkey