16层螺旋CT在足、腕骨病变诊断中的临床应用

目的:探讨16层螺旋CT及其三维重建(3D)与多平面重组(MPR)在足、腕骨病变诊断中的临床应用价值.方法:32例足、腕骨病例均采用16层螺旋CT进行扫描,在工作站上进行3D及MPR影像后处理,并对结果进行比较和综合分析.结果:32例病例中正常足骨5例,腕骨3例,拇指外翻畸形2例,跟骨粉碎性骨折后致慢性骨髓炎,骨质疏松2例,距骨骨折5例,舟月骨骨折并月骨缺血性坏死1例,跟骨结核6例,腕骨骨髓炎、骨质疏松3例,跟骨粉碎性骨折5例.16层螺旋CT的3D图像可清晰显示正常小关节及其病变的立体形态,MPR图像则可以多平面多角度地观察骨关节的大小、形态、密度等的改变,对病变显示满意.结论:多层螺旋CT重建能提供骨关节病变非常有价值的空间关系信息,其表现接近病理解剖,临床应用价值大,有利于临床医师选择治疗方案、制订手术计划.

Clinical Application of 16-slice Spiral CT in the Diagnosis of Diseases of Foot and Wrist

Objective:To evaluate the value of 16-slice spiral CT(SCT) with 3-dimensional (3D) reconstruction and multiplanar reformation(MPR)in the diagnosis of diseases of foot and wrist.Methods:Thirty-two patients with suspected diseases of foot and wrist underwent 16-slice SCT.Images obtained with postprocessing techniques including 3D reconstruction and MPR performed on a workstation for each case were reviewed.Results:SCT revealed 5 normal feet and 3 normal wrists,2 cases of hallux valgus,2 cases of chronic osteomyelitis with osteoporosis complicating comminuted fracture of calcaneus,5 cases of fractures of talus,1 case of carpal scaphoid and lunate fracture complicating lunate avascular necrosis,6 cases of tuberculosis of calcaneus,3 cases of chronic osteomyelitis complicated with osteoporosis of carpal bones,5 cases of comminuted fracture of calcancus.16-slice SCT with 3D reconstruction demonstrated stereoscopic morphology of normal and lesions clearly while MPR correctly demonstrated details and density,shape and size of lesions.Conclusion:Sixteen-slice SCT with 3D and MPR techniques can provide valuable spatial information of diseases in bones and joints of wrist and foot which correlated well with that of pathological anatomy.