Computed tomographic features of lung lobe torsion.
The imaging features of lung lobe torsion in 10 dogs (nine complete, one partial torsion) acquired with a helical single-slice computed tomography (CT) unit are described. Attenuation values of normal, rotated, and adjacent collapsed lung lobes before and after intravenous contrast medium administration were compared. Affected lung lobes were: left cranial (5), right middle (3), right cranial (1), and left caudal (1). CT findings in nine dogs with complete lung lobe torsion included pleural effusion and an abruptly ending bronchus. In eight of these dogs, enlargement, consolidation, emphysema of the affected lung lobe, and mediastinal shift to the contralateral side were present. Rotated lung lobes did not enhance, whereas adjacent collapsed and aerated lung lobes did (P < 0.05). Apnea induced with hyperventilation or breath-hold is essential to reduce motion artefacts and obtain a diagnostic study.
Seiler
Gabriela
G
Department of Clinical Studies-Philadelphia, School of Veterinary Medicine, University of Pennsylvania, 3900 Spruce Street, Philadelphia 19104-6010 ,USA. gseiler@vet.upenn.edu
Schwarz
Tobias
T
Vignoli
Massimo
M
Rodriguez
Daniel
D
D000818:Animals; D004283:Dog Diseases / Q000000981:diagnostic imaging*; D004285:Dogs; D004646:Emphysema / Q000000981:diagnostic imaging / Q000662:veterinary; D005260:Female; D008171:Lung Diseases / Q000000981:diagnostic imaging / Q000662:veterinary*; D008297:Male; D010996:Pleural Effusion / Q000000981:diagnostic imaging / Q000662:veterinary; D036542:Tomography, Spiral Computed / Q000379:methods / Q000662:veterinary*; D014102:Torsion Abnormality / Q000000981:diagnostic imaging / Q000662:veterinary*