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排序方式: 共有539条查询结果,搜索用时 31 毫秒
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Oyen RH; Gielen JL; Van Poppel HP; Verbeken EK; Van Damme BJ; Baert LV; Baert AL 《Radiology》1988,169(3):705-707
Abdominal radiography, excretory urography, retrograde pyelography, and computed tomography were performed in two patients who had undergone retrograde pyelography with thorium dioxide (Thorotrast) approximately 40 years ago. Both patients developed a transitional cell carcinoma due to suburothelial thorium deposition. Typical thorium densities were demonstrated at CT in the peripelvicalyceal area as well as in retroperitoneal lymph nodes. Elderly patients in whom radiographic examination reveals retained Thorotrast in the kidney should be followed up because of the high risk of renal carcinoma. 相似文献
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Magnuson JE; Brown ML; Hauser MF; Berquist TH; Fitzgerald RH Jr; Klee GG 《Radiology》1988,168(1):235-239
When infection of prosthetic orthopedic implants is suspected, optimal management requires accurate confirmation or exclusion of infection. The authors retrospectively studied 98 patients with possible infection who underwent scanning with indium-111-labeled white blood cells (WBCs) and subsequently underwent surgery within 14 days. At surgery, 50 patients had infections, as determined by means of culture or histologic results. The diagnostic accuracy of In-111 scanning was compared with that of plain radiography, arthrography, three-phase bone scanning, and various clinical and laboratory findings classically associated with infection. Positive findings on In-111 WBC scans and elevated erythrocyte sedimentation rates were found to be the most predictive variables in the diagnosis of septic prostheses (P less than or equal to .001 and P less than or equal to .002, respectively). Likelihood ratio analysis more clearly demonstrated the superiority of In-111 WBC scanning, with positive and negative scans yielding likelihood ratios of 5.0 and 0.16, respectively. 相似文献
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We compared patient morbidity associated with temporomandibular joint (TMJ) arthrography using both meglumine/sodium diatrizoate (60%) and the new monoacidic dimer, Hexabrix, in a double-blind randomized clinical trial in 31 patients. Patients experienced maximal discomfort from TMJ arthrography with the initial joint filling and joint distension; this rapidly resolved over 10 minutes. Delayed exacerbation of pain is less than described for shoulder arthrography. The newer contrast media promise to decrease patient morbidity with arthrography. 相似文献
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A. C. Monster M. D. J. M. Houtkooper 《International archives of occupational and environmental health》1979,42(3-4):319-323
Summary The results of single exposure studies with exposure to trichloroethylene, TRI, (Monster et al., 1976), to 1,1,1-trichloroethane, MC, (Monster et al., 1979b) and to tetrachloroethylene, PERC, (Monster et al., 1979c) were used to study the precision in estimating the individual uptake from measured biological parameters after exposure. With simple linear and multiple linear regression analysis the individual uptake of TRI, MC and PERC was estimated from the concentrations of solvents and metabolites in biological media (blood, urine, exhaled air) at 2 h and at 20 h after exposure. The best results are obtained by estimation from the concentrations in blood, particularly of the solvents themselves. Including results of simultaneously measured concentrations in exhaled air or urine did not improve the estimate. 相似文献
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Fifty-nine pediatric patients with urinary tract infection (UTI) underwent renal ultrasonography, excretory urography, and voiding cystourethrography. The imaging procedures were analyzed retrospectively to determine their relative effectiveness in detecting abnormalities that might predispose the patient to UTI. Voiding cystourethrography provided valuable information, particularly the presence or absence of vesicoureteral reflux, that could not be obtained from the other procedures. Excretory urography was less specific than ultrasonography in the majority of patients, with the exception of those who had renal scarring. The authors recommended ultrasonography as the initial imaging procedure in the evaluation of children with UTI. When the sonogram is normal, excretory urography is not considered necessary, but voiding cystourethrography is thought to be essential. If sonography is abnormal, excretory urography and/or other follow-up studies are indicated. 相似文献