结果30例为阳性结石，16例为阴性结石，2例为血凝块引起的输尿管的急性或亚急性完全梗阻；
Results In 48 cases, 30 with nonradiolucent calculus, 16 with radiolucent calculus and 2 with blood coagulum were detected as the causes of acute or subacute complete urethral obstruction.
结论组织谐波显像能明显提高图象的反差及对比度，改善图象质量，使泌尿系结石的阳性显示率和诊断准确性明显提高。
Conclusions the tissue harmonic imaging evidently improves the contrast and imaging quality, so that the positive rate and diagnostic accuracy of calculus would be upgraded.
结石处棉拭子细菌培养阳性仅见于感染石患者，且菌种与结石菌种相同。
Only in patients with infectious stones, the cotton swab culture showed positive and with the same strain.
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