摘要
目的:观察和比较三维螺旋CT表面再现和容积再现技术显示颌面部囊肿及肿瘤的效果,探讨三维成像技术的临床应用价值。方法:对40例颌面部囊肿及肿瘤患者进行螺旋扫描后,在三维后处理工作站进行表面再现和容积再现重建并测量,结合术中所见比较二者在定位定界,显示病损所破坏,骨皮质膨胀等方面的效果。以既往二维CT为基础进行的颌骨手术为对照,比较三维螺旋CT在术中并发症、术后并发症及手术时间上的差别。结果:容积再现技术在定位、定界、显示骨膨胀和破坏方面均优于表面再现技术,测量值更接近术中测量(P<0.05)。三维螺旋CT在手术中的指导意义优于二维CT,术中及术后并发症少(P>0.05);试验组患者术后12个月复发率(7.50%)低于对照组(15.11%)。结论:容积再现技术在定性及定量评估方面较表面再现技术更精确,所获信息更全面,更能反映病损的真实情况。三维螺旋CT,尤其是容积再现技术作为口腔颌面外科的重要诊断手段,对提高手术效果,防止复发有重要意义。
Objective： To compare the radiographic and clinical value of surface-rendering and volume-rendering technique of 3D-CT in the diagnosis of maxillofacial cysts and tumors. Methods： 40 patients with cysts and/or tumors in the maxillofacial complex were scanned with 5mm collimation, reconstructive interval 1mm and pitch of 0.75; data obtained were transferred to workstation and were processed with SSD and VR. The images generated by both techniques were compared for location, delimitation, expansions, and destruction of cortex, destruction of bone structure with operation finding. Differences in the operation time and complications during and after surgery of between the patients undertaking 3D-CT and patients undertaking 2D-CT were compared. All patients were followed up 6months and 12 months after surgery. Results： VR was more accurate and superior to SSD in displaying location, delimitation, expansion and destruction of bone structures. Images acquired by VR technique showed better reflection of the true lesions（P〈0.05）. Surgery based on 3D-CT were shorter, with less complications than those based on 2D-CT （P〉0.05）. Recurrence rate of control group was higher too. Conclusions： 3D images with SSD and VR presented a direct visualization of maxillofacial mass. VR technique was more reproducible and sensitive than the SSD method. 3D-CT has important value in diagnosis and assessment of surgery.
出处
《中华老年口腔医学杂志》
2009年第1期28-32,共5页
Chinese Journal of Geriatric Dentistry
关键词
囊肿
肿瘤
体层摄影术
容积再现
表面再现
cysts
tumor
spiral computed tomography （SCT）
volume-rendering
surface （shadow）-rendering
