Diagnostic Efficiency of Split-Bolus Dual-Energy Computed Tomography for Patients With Suspected Urinary Stones

2015 ◽  
Vol 39 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Yu Jin Yeo ◽  
See Hyung Kim ◽  
Mi Jeong Kim ◽  
Young Hwan Kim ◽  
Seung Hyun Cho ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Dual Energy ◽  
Urinary Stones ◽  
Diagnostic Efficiency ◽  
Dual Energy Computed Tomography

In Vivo Analysis of Urinary Stones With Dual-Energy Computed Tomography

2019 ◽  
Vol 43 (2) ◽  
pp. 214-219 ◽  
Author(s):  
Hasan Erdogan ◽  
Osman Temizoz ◽  
Mustafa Koplay ◽  
Bahadir Ozturk
Keyword(s):  
Computed Tomography ◽  
Dual Energy ◽  
Urinary Stones ◽  
Dual Energy Computed Tomography ◽  
In Vivo Analysis

scholarly journals Efficiency of dual-energy computed tomography enterography in the diagnosis of Crohn’s disease

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Jinghao Chen ◽  
Jie Zhou ◽  
Jushun Yang ◽  
Ruochen Cong ◽  
Jinjie Sun ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Dual Energy ◽  
Diagnostic Efficiency ◽  
Diagnostic Efficacy ◽  
Dual Energy Computed Tomography ◽  
Computed Tomography Enterography ◽  
Monoenergetic Imaging ◽  
Iodine Map

Abstract Background This retrospective study aimed to investigate the usefulness of the optimized kiloelectron volt (keV) for virtual monoenergetic imaging (VMI) combined with iodine map in dual-energy computed tomography enterography (DECTE) in the diagnosis of Crohn’s disease (CD). Methods Seventy-two patients (mean age: 41.89 ± 17.28 years) with negative computed tomography enterography (CTE) were enrolled for investigating the optimized VMI keV in DECTE by comparing subjective and objective parameters of VMIs that were reconstructed from 40 to 90 keV. Moreover, 68 patients (38.27 ± 15.10 years; 35 normal and 33 CD) were included for evaluating the diagnostic efficacy of DECTE iodine map at the optimized VMI energy level and routine CTE for CD and active CD. Statistical analysis for all data was conducted. Results Objective and subjective imaging evaluations showed the best results at 60 keV for VMIs. The CT values of the normal group, active subgroup, and CD group during the small intestinal phase at routine 120 kVp or 60 keV VMI had significant differences. The diagnostic efficacy of an iodine map was the best when NIC = 4% or fat value = 45.8% for CD, whereas NIC < 0.35 or the fat value < 0.38 for active CD. The combined routine CTE and optimized VMI improved the diagnostic efficacy (P < 0.001). Conclusions VMI at 60 keV provided the best imaging quality on DECTE. NIC and fat value provided important basis for active CD evaluation. Routine CTE combined with VMI at 60 keV improved the diagnostic efficiency for CD.

Dual energy computed tomography in diagnosis of urolithiasis: a new method for determining the chemical composition of urinary stones

Urologiia ◽  
2017 ◽  
Vol 3_2017 ◽  
pp. 98-103 ◽  
Author(s):  
A.G. Martov Martov ◽  
D.A. Mazurenko Mazurenko ◽  
M.M. Klimkova Klimkova ◽  
V.E. Sinitsyn Sinitsyn ◽  
L.A. Nersisyan Nersisyan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Chemical Composition ◽  
Dual Energy ◽  
New Method ◽  
Urinary Stones ◽  
Dual Energy Computed Tomography

scholarly journals Characterization of Mixed Urinary Stone Compositions with Dual-Source Dual-Energy Computed Tomography in Vivo Compared to Infrared Spectroscopy

2021 ◽  
Vol 18 (3) ◽  
Author(s):  
Xianghu Meng ◽  
Xueying Sun ◽  
Rong Cong ◽  
Liang Qi ◽  
Zengjun Wang ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Infrared Spectroscopy ◽  
Urinary Calculi ◽  
Dual Energy ◽  
Urinary Stones ◽  
Stone Composition ◽  
Dual Energy Computed Tomography ◽  
Imaging Characteristics ◽  
Dual Source

Background: Most previous studies have demonstrated the possibility of using dual-source dual-energy computed tomography (DSDECT) to distinguish pure stones with high accuracy. While stones are usually composed of a mixture of substances, very few studies have focused on these stone compositions. Objectives: To retrospectively evaluate the diagnostic accuracy of DSDECT in predicting the composition of mixed urinary calculi in vivo compared to the postoperative infrared spectroscopy (IRS) for stone analysis. Materials and Methods: We retrospectively included 111 patients with 117 mixed urinary stones, detected by IRS, who underwent DSDECT between June 2018 and March 2020. Patients diagnosed with urolithiasis were examined by DSDECT preoperatively. The final stone composition was detected by IRS in vitro postoperatively. Also, the stone composition predicted by DSDECT was compared to the IRS results, known as the reference standard. Results: According to the results of IRS, 117 mixed urinary calculi, composed of a main constituent and minor admixtures, were divided into four groups: calcium oxalate (CaOx)-hydroxyapatite (HA) (n = 70); HA-CaOx (n = 36); uric acid (UA)-CaOx (n = 8); and cystine (CYS)-HA (n = 3). The accuracy of DSDECT in predicting different components of mixed urinary stones was 68.4%, 64.1%, 97.4%, and 97.5% for the CaOx-HA, HA-CaOx, UA-CaOx, and CYS-HA stones, respectively. The imaging characteristics of different mixed urinary stones, as shown by DSDECT, revealed that the CaOx-HA ratio value was lower than that of HA-CaOx (1.59 ± 0.11 vs. 1.66 ± 0.22; P < 0.05). Meanwhile, the computed tomography (CT) values of CaOx-HA under 150 kV were higher than those of HA-CaOx (915.41 ± 226.84 vs .799.56 ± 252.01; P < 0.05). Conclusion: Although DSDECT has a relatively low accuracy for predicting the components of CaOx-HA and HA-CaOx in vivo, its combination with the measured ratio and CT values may help differentiate these stones.

Single-Source Dual-Energy Computed Tomography Detects Disk Injury in Patients with Vertebral Fractures

2019 ◽  
Author(s):  
Torsten Diekhoff ◽  
Michael Fuchs ◽  
Nils Engelhard ◽  
Kay-Geert Hermann ◽  
Michael Putzier ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Vertebral Fractures ◽  
Dual Energy ◽  
Single Source ◽  
Dual Energy Computed Tomography

Dual energy computed tomography angiography of a pulmonary embolized port catheter fragment

2011 ◽  
Vol 12 (1) ◽  
pp. 62-63 ◽  
Author(s):  
Thomas Henzler ◽  
Steffen Diehl ◽  
Susanne Jochum ◽  
Tim Sueselbeck ◽  
Stefan O Schoenberg ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Computed Tomography Angiography ◽  
Dual Energy ◽  
Port Catheter ◽  
Dual Energy Computed Tomography

scholarly journals Dual-Energy Computed Tomography of the Liver: Uses in Clinical Practices and Applications

Diagnostics ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 161
Author(s):  
Masakatsu Tsurusaki ◽  
Keitaro Sofue ◽  
Masatoshi Hori ◽  
Kosuke Sasaki ◽  
Kazunari Ishii ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Liver Tumors ◽  
Energy Levels ◽  
Ct Scanning ◽  
Dual Energy ◽  
Liver Imaging ◽  
X Rays ◽  
Clinical Practices ◽  
Dual Energy Computed Tomography ◽  
Noise Ratio

Dual-energy computed tomography (DECT) is an imaging technique based on data acquisition at two different energy settings. Recent advances in CT have allowed data acquisitions and simultaneous analyses of X-rays at two energy levels, and have resulted in novel developments in the field of abdominal imaging. The use of low and high X-ray tube voltages in DECT provide fused images that improve the detection of liver tumors owing to the higher contrast-to-noise ratio (CNR) of the tumor compared with the liver. The use of contrast agents in CT scanning improves image quality by enhancing the CNR and signal-to-noise ratio while reducing beam-hardening artifacts. DECT can improve detection and characterization of hepatic abnormalities, including mass lesions. The technique can also be used for the diagnosis of steatosis and iron overload. This article reviews and illustrates the different applications of DECT in liver imaging.

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