Evaluation of spiral CT imaging in the diagnosis of the primary ureteral carcinoma

Objective: To explore the characteristics of the primary ureteral carcinoma (PUC) and discuss the value of spiral CT (SCT) in the diagnosis of PUC. Methods: The SCT findings of the primary ureteral carcinoma in 16 cases were analyzed and compared with the histopathological diagnosis and staging. Results: The transverse diameters of the lesions were 1.0–2.1 cm, and the longitudinal lengths were 1.5–15.2 cm. There were no statistically significant differences (P>0.1) in diam- eters and lengths among the low staging group (pT0–T2) and the high staging group (pT3–T4). The average CT value of the lesions was 43 HU on plain scanning, and 73 HU on CE scanning. The increment was 30 HU. The lesions were clearer on CE scanning. Curved planar reconstruction (CPR) could show the entire course of the urinary tract. Among 6 cases of pT3 stage, CT gave a correct diagnosis in 1 case. For 2 cases of pT4 stage, CT gave correct diagnoses in both cases. Conclusion: The carcinomatous lesions spread along the ureter. The longitudinal length of each lesion is longer than its transverse diameter. Tumor cannot be staged merely according to its diameter and length. CT is difficult to differentiate stage T0–T3, while for stage T4, CT diagnosis is accurate. Contrast enhancement CT scanning has the confirming and differentiating roles. CPR offers direct and easy observing images for clinical doctors.

对比分析CBCT与普通X线曲面体层片在上颌后牙区种植治疗中的诊断价值

目的探讨分析锥形束CT(CBCT)与普通X线曲面体层片在上颌后牙区种植治疗中的诊断价值。方法 80例于本院行上颌后牙区种植手术治疗的患者,均行上颌牙区的CBCT检查及普通X线曲面体层片检查。比较CBCT检查与X线曲面体层片对上颌后牙区牙槽骨量不足检出率、种植术后的种植体未发生骨结合检出情况。结果 CBCT对上颌后牙区牙槽骨量不足检出率为40.00%(32/80),高于X线曲面体层片的25.00%(20/80),差异有统计学意义(P<0.05)。CBCT对种植体未发生骨结合检出率为5.45%, X线曲面体层片对种植体未发生骨结合检出率为11.82%,比较差异无统计学意义(P>0.05)。结论 CBCT与普通X线曲面体层片相比,可在当前临床医学诊断中更为准确的对术前上颌后牙区牙槽骨的骨量进行评估,并且可在手术治疗后,清晰地反映患者种植体周围骨质,可以在当前临床医学中推广使用。