Kluner Claudia, Hein Patrick A, Gralla Oliver, Hein Eike, Hamm Bernd, Romano Valentina, Rogalla Patrik
Department of Radiology, Charité Universitätsmedizin Berlin, Campus Mitte, Berlin, Germany.
J Comput Assist Tomogr. 2006 Jan-Feb;30(1):44-50. doi: 10.1097/01.rct.0000191685.58838.ef.
The objective of this study was to evaluate the diagnostic yield of multislice CT using a radiation dose equivalent to that of conventional abdominal x-ray (KUB). One hundred forty-two patients were prospectively examined with ultrasound and a radically dose-reduced CT protocol (120 kV, 6.9 eff. mAs). Number and size of calculi, presence of urinary obstruction, and alternative diagnoses were recorded and confirmed by stone removal/discharge or by clinical and imaging follow-up. The mean effective whole-body dose was 0.5 mSv in men and 0.7 mSv in women. The sensitivity and specificity in detecting patients with calculi was 97% and 95% for CT and 67% and 90% for ultrasound. Urinary obstruction was similarly assessed, whereas CT identified significantly more alternative diagnoses than ultrasound (P<0.001). With regard to published data for standard-dose CT, the present CT protocol seems to be comparable in its diagnostic yield in assessing patients with calculi, and its radiation dose is equivalent to that of KUB.
本研究的目的是评估多层螺旋CT的诊断效能，其辐射剂量等同于传统腹部X线平片（KUB）。对142例患者进行了前瞻性检查，先进行超声检查，然后采用大幅降低辐射剂量的CT扫描方案（120 kV，6.9等效毫安秒）。记录结石的数量和大小、尿路梗阻情况以及其他诊断结果，并通过结石取出/排出或临床及影像学随访进行确认。男性的平均全身有效剂量为0.5 mSv，女性为0.7 mSv。CT检测结石患者的敏感性和特异性分别为97%和95%，超声分别为67%和90%。对尿路梗阻进行了类似评估，而CT发现的其他诊断结果明显多于超声（P<0.001）。就标准剂量CT的已发表数据而言，目前的CT扫描方案在评估结石患者时的诊断效能似乎相当，且其辐射剂量等同于KUB。
