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Your search keyword '"Minh-Truc Vo-Cong"' showing total 6 results
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6 results on '"Minh-Truc Vo-Cong"'

1. Preclinical evaluation of acoustic radiation force impulse measurements in regions of heterogeneous elasticity

Author

Katharina Hollerieth, Bernhard Gaßmann, Stefan Wagenpfeil, Philipp Moog, Minh-Truc Vo-Cong, Uwe Heemann, and Konrad Friedrich Stock

Subjects
Elasticity imaging techniques, Ultrasonography, Phantoms, imaging, Transducers, Heterogeneity, Medical technology, R855-855.5
Abstract

Purpose The purpose of this study was to compare the reliability of ultrasound-based shear wave elastography in regions of homogeneous versus heterogeneous elasticity by using two different probes. Methods Using acoustic radiation force impulse (ARFI) elastography, we measured the shear wave velocity (SWV) in different lesions of an elastography phantom with the convex 4C1 probe and the linear 9L4 probe. The region of interest (ROI) was positioned in such a way that it was partly filled by one of the lesions (0%, 25%, 50%, 75%, and 100%) and partly by the background of the phantom (100%, 75%, 50%, 25%, and 0%, respectively). Results The success rate was 98.5%. The measured value and the reference value of SWV correlated significantly (r=0.89, P

Published
2016
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2. Miniaturised ultrasound evaluation at the bedside

Author

Katharina Hollerieth, Minh-Truc Vo-Cong, Stephanie Preuss, Stephan Kemmner, and Konrad Friedrich Stock

Subjects
Urology
Abstract

Purpose “Point-of-Care Ultrasound” (POCUS) is now a familiar term. Although the European Federation of Societies for Ultrasound in Medicine and Biology (ESFUMB) published a position paper about its usage (Nielsen et al. in Ultraschall Med 40(1):30–39. https://doi.org/10.1055/a-0783-2303, 2019), there has not been much scientific focus on its utility in uro-nephrological clinical practice thus far. The aim of this study was to evaluate the present usage of pocket ultrasound devices at the bedside. Methods 27 investigators (all medical doctors with at least 6 months of experience in sonography) performed 280 bedside examinations using a pocket ultrasound device for common clinical issues. Results The most frequent indications included evaluation of hydronephrosis (147), volume management including assessment of dimension of the vena cava inferior (IVC) (195), detection of pleural, pericardial and abdominal effusions (113) as well as residual urine (52). In 90%, specific clinical questions were effectively answered by the pocket ultrasound device alone. Conclusions POCUS can be useful in the uro-nephrological field. In the hands of an experienced investigator, it saves time and, when it is realised that departmental ultrasound is not cheap, there is also an economic benefit with applicability within both inpatient and outpatient clinic settings. While acknowledging its technical limits, pocket ultrasound devices may nevertheless be helpful in targeted situations for triage or for bedside follow-up exams after earlier high-end ultrasound-based diagnosis.

Published
2022
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3. Preclinical evaluation of acoustic radiation force impulse measurements in regions of heterogeneous elasticity

Author

Konrad Stock, Bernhard Gaßmann, Minh-Truc Vo-Cong, Uwe Heemann, Stefan Wagenpfeil, Katharina Hollerieth, and Philipp Moog

Subjects
medicine.medical_specialty, lcsh:Medical technology, Transducers, Impulse (physics), Phantoms, imaging, Imaging phantom, Standard deviation, 030218 nuclear medicine & medical imaging, 03 medical and health sciences, Elasticity Imaging Techniques, 0302 clinical medicine, Elasticity imaging techniques, Region of interest, Medicine, Radiology, Nuclear Medicine and imaging, Elasticity (economics), Acoustic radiation force, Ultrasonography, medicine.diagnostic_test, business.industry, ddc, lcsh:R855-855.5, 030220 oncology & carcinogenesis, Original Article, Radiology, Elastography, Heterogeneity, business, Biomedical engineering
Abstract

PURPOSE The purpose of this study was to compare the reliability of ultrasound-based shear wave elastography in regions of homogeneous versus heterogeneous elasticity by using two different probes. METHODS Using acoustic radiation force impulse (ARFI) elastography, we measured the shear wave velocity (SWV) in different lesions of an elastography phantom with the convex 4C1 probe and the linear 9L4 probe. The region of interest (ROI) was positioned in such a way that it was partly filled by one of the lesions (0%, 25%, 50%, 75%, and 100%) and partly by the background of the phantom (100%, 75%, 50%, 25%, and 0%, respectively). RESULTS The success rate was 98.5%. The measured value and the reference value of SWV correlated significantly (r=0.89, P

Published
2016

4. Autosomal dominant polycystic kidney disease: modifier genes and endothelial dysfunction

Author

Alexandre Persu, Olivier Devuyst, and Minh-Truc Vo-cong

Subjects
Transplantation, Mutation, medicine.medical_specialty, TRPP Cation Channels, Endothelium, business.industry, Autosomal dominant polycystic kidney disease, Membrane Proteins, Proteins, medicine.disease_cause, medicine.disease, Polycystic Kidney, Autosomal Dominant, Endocrinology, medicine.anatomical_structure, Nephrology, Internal medicine, medicine, Polycystic kidney disease, Humans, Cyst, Endothelium, Vascular, Endothelial dysfunction, business, Gene, Kidney disease
Published
2003

5. The transplanted patient who suffered from excruciating lower limb pain and developed nodular skin lesions

Author

Liliane Marot, Minh-Truc Vo-cong, Eric Goffin, Alexandre Persu, UCL - (SLuc) Service de dermatologie, UCL - MD/MINT - Département de médecine interne, UCL - (SLuc) Service de pathologie cardiovasculaire, and UCL - (SLuc) Centre de malformations vasculaires congénitales

Subjects
Male, Transplantation, medicine.medical_specialty, Panniculitis, Liver transplantation, business.industry, Cryptococcosis, Middle Aged, medicine.disease, Kidney Transplantation, Lower limb pain, Excruciating, Surgery, Liver Transplantation, Kidney transplantation, Nephrology, Nodular skin lesions, Medicine, Humans, business, Complication, Cytophagic histiocytic panniculitis, Mycosis
Published
1999

6. Preclinical evaluation of acoustic radiation force impulse measurements in regions of heterogeneous elasticity.

Author

Hollerieth, Katharina, Moog, Philipp, Minh-Truc Vo-Cong, Heemann, Uwe, Stock, Konrad Friedrich, Gaßmann, Bernhard, and Wagenpfeil, Stefan

Subjects
HETEROGENEITY, ACOUSTIC radiation force impulse imaging, ULTRASONIC imaging
Abstract

Purpose: The purpose of this study was to compare the reliability of ultrasound-based shear wave elastography in regions of homogeneous versus heterogeneous elasticity by using two different probes. Methods: Using acoustic radiation force impulse (ARFI) elastography, we measured the shear wave velocity (SWV) in different lesions of an elastography phantom with the convex 4C1 probe and the linear 9L4 probe. The region of interest (ROI) was positioned in such a way that it was partly filled by one of the lesions (0%, 25%, 50%, 75%, and 100%) and partly by the background of the phantom (100%, 75%, 50%, 25%, and 0%, respectively). Results: The success rate was 98.5%. The measured value and the reference value of SWV correlated significantly (r=0.89, P<0.001). Further, a comparison of the two probes revealed that there was no statistical difference in either the mean or the variance values. However, the deviation of SWV from the reference was higher in the case of the 9L4 probe than in the case of the 4C1 probe, both overall and in measurements in which the ROI contained structures of different elasticity (P=0.021 and P=0.002). Taking into account all data, for both probes, we found that there was a greater spread and deviation of the SWV from the reference value when the ROI was positioned in structures having different elastic properties (standard deviation, 0.02±0.01 m/sec vs. 0.04±0.04 m/sec; P=0.010; deviation from the reference value, 0.21±0.12 m/sec vs. 0.38±0.27 m/sec; P=0.050). Conclusion: Quantitative ARFI elastography was achievable in structures of different elasticity; however, the validity and the reliability of the SWV measurements decreased in comparison to those of the measurements performed in structures of homogeneous elasticity. Therefore, a convex probe is preferred for examining heterogeneous structures. [ABSTRACT FROM AUTHOR]

Published
2016
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