Meagher T, Sukumar V P, Collingwood J, Crawley T, Schofield D, Henson J, Lakin K, Connolly D, Giles J
Department of Radiology, Stoke Mandeville Hospital Trust, Aylesbury, Buckinghamshire, UK.
Clin Radiol. 2001 Nov;56(11):873-6. doi: 10.1053/crad.2001.0842.
To evaluate whether computed tomography (CT) of the renal tract in suspected renal colic using reduced exposure factors maintains diagnostic accuracy.
Prospective multi-centre cohort study. Patients with suspected renal colic were examined using computed tomography (CT) of the renal tract followed by intravenous urography (IVU) in four different centres with five different CT systems.
Sixty-nine patients with suspected renal colic had CT of the renal tract followed by IVU. CT was performed with reduced exposure factors, giving a mean CT effective dose of 3.5 (range 2.8-4.5) mSv compared with 1.5 mSv for IVU. Ureteric calculi were detected in 43 patients: CT and IVU detected 40 (93%) ureteric calculi. CT identified other lesions causing symptoms in five patients and identified renal calculi in 24 patients. IVU identified renal calculi in six patients and made false positive diagnosis of renal calculi in seven patients. Mean examination time for CT was 5 minutes and for IVU was 80 minutes.
CT examination at reduced exposure factors maintains the diagnostic accuracy recorded in other series.
评估在疑似肾绞痛患者中使用降低的曝光参数进行泌尿系统计算机断层扫描（CT）是否能保持诊断准确性。
前瞻性多中心队列研究。在四个不同中心使用五种不同的CT系统，对疑似肾绞痛患者先进行泌尿系统计算机断层扫描（CT），随后进行静脉肾盂造影（IVU）检查。
69例疑似肾绞痛患者接受了泌尿系统CT检查，随后进行IVU检查。CT检查采用降低的曝光参数，平均CT有效剂量为3.5（范围2.8 - 4.5）mSv，而IVU为1.5 mSv。43例患者检测到输尿管结石：CT和IVU均检测到40例（93%）输尿管结石。CT在5例患者中发现了其他引起症状的病变，并在24例患者中发现了肾结石。IVU在6例患者中发现了肾结石，在7例患者中对肾结石做出了假阳性诊断。CT的平均检查时间为5分钟，IVU为80分钟。
使用降低曝光参数的CT检查能保持其他系列研究中记录的诊断准确性。
