scholarly journals Dual-Energy Computed Tomography untuk Menentukan Komposisi Batu Urin

2017 ◽  
Vol 2 (2) ◽  
pp. 104-116
Author(s):  
Pramiadi Pramiadi ◽  
Bambang Purwanto Utomo ◽  
Nurhuda Hendra Setyawan
Keyword(s):  
Computed Tomography ◽  
Preoperative Evaluation ◽  
Urinary Calculi ◽  
Urinary Stone ◽  
Dual Energy ◽  
Common Disease ◽  
Stone Composition ◽  
Dual Energy Computed Tomography ◽  
Imaging Pitfalls

Urolithiasis is a common disease with a reported prevalence between 4% and 20% in the worldwide. Determination of urinary calculi composition is a key factor in preoperative evaluation, treatment, and recurrence prevention. Dual-energy computed tomography (DECT) is available methods for determining urinary stone composition were only available after stone extraction, and thereby unable to aid in optimized stone management prior to intervention. DECT utilizes the attenuation difference produced by two different x-ray energy spectra to quantify urinary calculi composition while still providing the information attained with a conventional CT. Knowledge of DECT imaging pitfalls and stone mimics is important, as the added benefit of dual-energy analysis is the determination of stone composition, which in turn affects all aspects of stone management. This article describes DECT principles, scanner types and acquisition protocols for the evaluation of urinary calculi as they relate to imaging pitfalls (inconsistent characterization of small stones, small DECT field of view, and mischaracterization from surrounding material) and stone mimics (drainage devices) that may adversely impact clinical decisions.

First Prize (Tie): Dual-Energy Computed Tomography with Advanced Postimage Acquisition Data Processing: Improved Determination of Urinary Stone Composition

2010 ◽  
Vol 24 (3) ◽  
pp. 347-354 ◽  
Author(s):  
Michael N. Ferrandino ◽  
Sean A. Pierre ◽  
Walter Neal Simmons ◽  
Erik K. Paulson ◽  
David M. Albala ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Data Processing ◽  
Urinary Stone ◽  
Dual Energy ◽  
Stone Composition ◽  
Dual Energy Computed Tomography

Determination of Renal Stone Composition in Phantom and Patients Using Single-Source Dual-Energy Computed Tomography

2013 ◽  
Vol 37 (1) ◽  
pp. 37-45 ◽  
Author(s):  
Naveen M. Kulkarni ◽  
Brian H. Eisner ◽  
Daniella F. Pinho ◽  
Mukta C. Joshi ◽  
Avinash R. Kambadakone ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Renal Stone ◽  
Dual Energy ◽  
Single Source ◽  
Stone Composition ◽  
Dual Energy Computed Tomography

PD36-01 THE QUALITATIVE DIAGNOSIS FOR THE URINARY STONE COMPOSITION USING DUAL ENERGY COMPUTED TOMOGRAPHY

2014 ◽  
Vol 191 (4S) ◽  
Author(s):  
Satoshi Yamaguchi ◽  
Hiroki Inoue ◽  
Masayuki Tokumitsu ◽  
Noriaki Masui ◽  
Shigeo Kaneko ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Urinary Stone ◽  
Dual Energy ◽  
Stone Composition ◽  
Dual Energy Computed Tomography

scholarly journals Three-Dimensional Dual-Energy Computed Tomography for Enhancing Stone/Stent Contrasting and Stone Visualization in Urolithiasis

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
El-Sayed H. Ibrahim ◽  
William E. Haley ◽  
Maria A. Jepperson ◽  
David D. Thiel ◽  
Michael J. Wehle ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Urinary Calculi ◽  
Dual Energy ◽  
Surgical Removal ◽  
Residual Stone ◽  
Stone Composition ◽  
Dual Energy Computed Tomography ◽  
Clinically Significant

The use of dual-energy computed tomography (DECT) for evaluating urinary calculi has been appreciated due to the modality’s capability of differentiating between uric acid (UA) and non-UA stones, which are color coded based on a postprocessing algorithm. No other imaging modality or laboratory test is able to identify the stone composition without first attaining the stone material. Knowledge of the stone composition is clinically significant since UA calculi may be treated medically whereas non-UA calculi may require surgical removal. Regardless of the stone type, ureteral stents are often placed to prevent or treat obstruction. Recent work has demonstrated that commonly used stents are also colored based on their dual energy characteristics and may thereby either improve or obscure the identification of adjacent calculi. Herein, we report the case of a 65-year-old man who underwent percutaneous nephrolithotomy of a large staghorn stone with subsequent significant residual stone fragments noted on a follow-up scan. By using three-dimensional DECT and taking advantage of color contrasting, the stone composition, burden, shape, and boundary were clearly depicted apart from the adjacent stent, resulting in successful medical treatment and obviating the need for further surgical intervention.

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