[CT-guided selective pneumomediastinography and its clinical evaluations].
CT diagnosis is playing a central role in the judgment of mediastinal invasion in esophageal and pulmonary cancers. Estimation of the mediastinal invasion is now based on the indirect findings such as presence of a fatty layer and angle of contact between the lesion and adjacent organs. An attempt to delineate directly the relation between the primary lesion and adjacent organs has been made by adopting new CT-guided selective pneumomediastinography (PMG CT). Twenty-three cases were studied with CT guided paravertebral route. Mediastinal invasion on PMG CT was judged by a condition of the air distribution to the adjacent organs. Assessment was made by the use of the findings whether the organs are separated by aeration or not and of presence or not of the "sulcus formation". The accuracy of judging mediastinal invasion has been improved from 41% by conventional CT to 85% by PMG CT based on the diagnostic criteria which adopted "sulcus formation". This method is useful clinically as a testing technique supplementing the conventional diagnostic imaging.
Uchimura
F
F
Department of Radiology, Yamagata University School of Medicine.
Kubota
H
H
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004938:Esophageal Neoplasms / Q000453:epidemiology / Q000473:pathology*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008175:Lung Neoplasms / Q000453:epidemiology / Q000473:pathology*; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging* / Q000453:epidemiology; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed