Characterization of ureteral stents by dual-energy computed tomography: Clinical implications  

作　　者：El-Sayed H Ibrahim William E Haley Maria A Jepperson Michael J Wehle Joseph G Cernigliaro 

机构地区：[1]Division of Nephrology and Hypertension, Mayo Clinic, Jacksonville, FL 32224, United States [2]Department of Radiology, Mayo Clinic, Jacksonville, FL 32224, United States [3]Department of Urology, Mayo Clinic, Jack-sonville, FL 32224, United States

出　　处：《World Journal of Radiology》2014年第8期625-628,共4页世界放射学杂志（英文版）（电子版）

摘　　要：Dual-energy computed-tomography(DECT) has been suggested as the method of choice for imaging urinary calculi due to the modality's high sensitivity for detect-ing stones and its capability of accurately differentiat-ing between uric-acid(UA) and non-UA(predominantly calcium) stones. The clinical significance of the latter feature relates to the differences in management of UA vs non-UA calculi. Like calculi, ureteral stents are assigned color by the dual-energy post-processing algorithm, which may lead to improved or worsened stone visualization based on the resulting stent/stone contrast. Herein we depict the case of a nephrolithiasis patient with bilateral stents, each with different color, clearly displaying the effect of stent color on stone vi-sualization. Further, three-dimensional reconstruction of the DECT images illustrates advantages of this enhancement compared to conventional two-dimensional computed tomography. The resulting stent/stone contrast produces an unanticipated potential advantage of DECT in patients with urolithiasis and stents and may promote improved management decision-making.Dual-energy computed-tomography(DECT) has been suggested as the method of choice for imaging urinary calculi due to the modality’s high sensitivity for detect-ing stones and its capability of accurately differentiat-ing between uric-acid(UA) and non-UA(predominantly calcium) stones. The clinical significance of the latter feature relates to the differences in management of UA vs non-UA calculi. Like calculi, ureteral stents are assigned color by the dual-energy post-processing algorithm, which may lead to improved or worsened stone visualization based on the resulting stent/stone contrast. Herein we depict the case of a nephrolithiasis patient with bilateral stents, each with different color, clearly displaying the effect of stent color on stone vi-sualization. Further, three-dimensional reconstruction of the DECT images illustrates advantages of this enhancement compared to conventional two-dimensional computed tomography. The resulting stent/stone contrast produces an unanticipated potential advantage of DECT in patients with urolithiasis and stents and may promote improved management decision-making.

关 键 词：Ureteral STENT DUAL-ENERGY computed-to-mography DUAL-ENERGY COMPUTED-TOMOGRAPHY KIDNEY STONES NEPHROLITHIASIS 

分 类 号：R691.4[医药卫生—泌尿科学] R318.1[医药卫生—外科学]