摘要
目的 探讨螺旋CT在叶内型肺隔离症诊断中对异常供血动脉显示的作用和方法。方法 将 14例肺隔离症患者的螺旋CT扫描方案分为 2组 ,第 1组 8例 ,单层螺旋扫描 :层厚 3mm ,床进 4 5mm/s,重建间隔 1 5mm者 5例。多层螺旋扫描 :实际层厚 2 5mm ,有效层厚 3 2mm者 3例。对比剂流率 2 5ml/s;启动智能扫描探测到腹主动脉上段强化最佳时开始扫描。扫描资料交工作站行三维图像后处理。第 2组 6例为单层螺旋扫描 ,其中 5例扫描层厚 5mm ,床进 5mm/s;1例扫描层厚 10mm ,床进 10mm/s。结果 病灶位于右下肺 2例 ,左下肺 12例。表现肿块者 11例 ,边缘清楚的结节者 3例。 14例均见异常供血动脉 ,发自腹主动脉 11例 ,胸主动脉 2例 ,脾动脉 1例 ;其中多层螺旋CT三维图像后处理显示异常供血动脉最佳。上述异常供血动脉均经外科手术证实。引流静脉均未显示。结论 在肺隔离症定性诊断中 ,多层螺旋CT横断面结合三维图像后处理利于显示异常供血动脉 。
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.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2003年第1期59-62,共4页
Chinese Journal of Radiology
关键词
螺旋CT
叶内型肺膈离症
诊断
病灶
异常供血动脉
Tomography, X-ray computed
Bronchopulmonary sequestration
Image processing, computer-assisted
