Diagnostic value of helical CT on intralobar pulmonary sequestration
- VernacularTitle:螺旋CT在叶内型肺隔离症诊断中的价值
- Author:
Zhiyong ZHANG
;
Li TAO
;
Gang CHEN
;
Dong WU
- Publication Type:Journal Article
- Keywords:
Tomography, X-ray computed;
Bronchopulmonary sequestration;
Image processing, computer-assisted
- From:
Chinese Journal of Radiology
2001;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the usefulness of the helical CT in demonstrating the abnormal blood vessels of intralobar pulmonary sequestration. Methods In fourteen patients with suspicion of pulmonary sequestration, contrast enhanced helical CT was performed. Clinical presentation included hemoptysis (2), pulmonary infection (8), and asymptomatic (4). Fourteen cases underwent helical CT examination with different scanner and scan parameters. Five CT angiography (CTA) studies were performed by single-section helical CT scanner (Hispeed Advantage, GE, USA) with 3 mm slide thickness, 4.5 mm/s table speed and 1.5 mm reconstruction index. Three CTA studies were done by multisection CT scanner (MX8000 four-slice CT, Marconi, USA) with a collimation of 2.5 mm, resulting in an effective slice width of 3.2 mm. Non-ionic contrast media (iodine 300 mg I/ml) was administered at a rate of 2.5 ml/s via the antecubital vein. The optimal opacification of the upper abdominal aorta were achieved through the use of the Smart Prep (Hispeed Advantage) program or by using the Boluspro ultra (MX8000). Three-dimensional reconstruction was performed with the workstation. Five cases were scanned by using single-section helical CT scanner with 5 mm collimated section and 5 mm/s table speed. And in one patient CT scan was performed with 10 mm section thickness and 10 mm/s table speed. Results CT findings were pulmonary mass (11) and well-defined nodules (3). The lesions were located in right lower lobe (2) and left lower lobe (12). Helical CT identified the aberrant arterial supply in all cases. The origin of the anomalous artery was the descending thoracic aorta (2), upper abdominal aorta (11) and splenic artery (1). These findings were confirmed by operation. Conclusion The combination of axial and 3D images in helical CT, especially the multislice helical CT, is helpful in the assessment of the abnormal blood vessels of intralobar pulmonary sequestration. It can substitute to the angiography in the diagnosis of pulmonary sequestration.
