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目的探讨多层螺旋CT(MSCT)胸骨成像方法及在诊断胸骨疾病中的应用价值。方法搜集经16层螺旋CT常规胸部容积扫描和薄层低对比图像重建108例,其中胸骨病变组8例、对照组100例。所有病例均应用标准和曲面多平面重组(MPR)、最大密度投影(MIP)、表面阴影法成像(SSD)及容积成像技术(VRT)对重建图像进行后处理,最后由2名CT诊断医师对各种后处理图像进行观察和分析。结果108例受检者的MSCT后处理图像均能显示胸骨。在显示细微骨质结构方面,矢状位MPR模式优于轴位MPR模式(U=14.107,P=0.000),冠状位曲面MPR模式优于冠状位MPR模式(U=11.882,P=0.000);在显示胸骨形态方面,VRT成像模式优于MIP和SSD2种成像模式(UVRT:MIP=13.553,UVRT:SSD=12.102,P值均=0.000)。8例胸骨病变组中,胸骨骨折5例,胸骨转移瘤3例。结论冠状位曲面MPR、矢状位MPR和VRT技术是显示胸骨的最佳MSCT成像方法,在评价胸骨疾患方面较常规平片和(或)CT更具优势和应用价值。
Objective To investigate the method of multi-slice spiral CT (MSCT) sternal imaging and its value in the diagnosis of sternal diseases. Methods Totally 108 cases were reconstructed by conventional chest volume scanning and low-contrast low-contrast image reconstruction by 16-slice spiral CT, including 8 cases of sternal lesion group and 100 cases of control group. In all cases, the reconstructed images were processed by standard and surface multiplanar reconstruction (MPR), maximum density projection (MIP), surface shadow imaging (SSD) and volumetric imaging (VRT) Various post-processed images were observed and analyzed. Results 108 cases of subjects after MSCT post-processing images can show the sternum. The MPR mode of the sagittal plane was superior to the axial MPR mode (U = 14.107, P = 0.000). The MPR mode of the coronal plane surface was superior to the MPR mode of the coronal plane (U = 11.882, P = 0.000). The VRT imaging modality was superior to the MIP and SSD imaging modalities in displaying sternal morphology (UVRT: MIP = 13.553, UVRT: SSD = 12.102, P = 0.000). Of the 8 patients with sternal lesions, 5 were sternal fractures and 3 were sternal metastases. Conclusion Coronal MPR and sagittal MPR and VRT are the best MSCT imaging methods for sternum. They are more effective and valuable in the evaluation of sternal diseases than conventional plain film and / or CT.