Contrast-enhanced ultrasound (CEUS) quantifies the perfusion within tibial non-unions and predicts the outcome of revision surgery
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Abstract:
Vascularity is one of the determining factors of successful bone regeneration. This prospective study focused on quantifying the microperfusion of tibial non-unions with contrast-enhanced ultrasound (CEUS) and comparing it to the outcome.Keywords:
Vascularity
Contrast-enhanced ultrasound
Objective To investigate the application potentiality of dynamic three-dimensional contrast-enhanced ultrasound (3D-CEUS) in showing vascular patterns of hepatic tumors.Methods Total of 65 hepatic tumors were examined with two-dimensional contrast-enhanced ultrasound (2D-CEUS) and dynamic 3D-CEUS and make statistical comparison between two imaging modes in aspects of enhancement patterns,spatial relationships of tumors and vascularity of different hepatic tumors.Results Dynamic 3D-CEUS showed the same enhancement patterns with 2D-CEUS.However,Dynamic 3D-CEUS was superior to 2D-CEUS in the display of spatial relationships of hepatic tumors and vascularity(P ＜0.05).The vascularity between benign and malignant hepatic tumors was statistically significant (P ＜ 0.05).Conclusions Dynamic 3D-CEUS is a useful technique in the differential diagnosis of hepatic tumors as well as 2D-CEUS,and dynamic 3D-CEUS displays the spatial relationship of hepatic tumors and vascularity more visually and comprehensively,which provides additional beneficial information for the diagnosis and therapy of hepatic tumors.
Key words:
Ultrasonography, three-dimensional ; Microbubbles ; Liver neoplasms
Vascularity
Contrast-enhanced ultrasound
Dynamic contrast
Hepatic tumor
Contrast Enhancement
Hepatic Diseases
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Background: This study investigated changes in tendon vascularity in 102 (67 men and 35 women) volleyball players over a 6 month competitive season. Methods: Athletes were examined with both grey scale ultrasound and standardised colour Doppler settings. Vessel length and pain were measured each month on five separate occasions. Vascular tendons were divided into (i) those that were vascular on all occasions (persistent vascularity) and (ii) those that were vascular on more than two but less than five occasions (intermittent vascularity). Results: A total of 41 of the 133 abnormal tendons were vascular on two or more occasions. Of these, 16 had persistent vascularity and 25 had intermittent vascularity. There was no significant difference in the prevalence of vascularity between men and women. None of the tendons had a pattern of vascularity over the season that could be clearly interpreted as the onset or resolution of vascularity. Subjects with changes in both tendons were more likely to have persistent vascularity (p = 0.045). Vessels were longer in tendons with persistent vascularity (p<0.000) and pain was significantly greater (p = 0.043) than in tendons with intermittent vascularity. Tendons with intermittent vascularity had similar pain scores on all days, whether or not they had detectable blood flow. Conclusions: These data suggest that the presence of blood vessels is more likely to be the source of pain than the blood flow in them.
Vascularity
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Background: Contrast-enhanced ultrasound (CEUS) permits evaluation of intratumoral vascularity in real time. The purpose of the present study was to compare the performance of conventional ultrasound (US) and CEUS in the evaluation of malignancy risk in patients with gastrointestinal stromal tumors (GISTs).Methods: In this retrospective study, we included patients with suspected GISTs who underwent conventional US and CEUS preoperatively. Fifty patients with pathologically confirmed GISTs were enrolled. Tumor risk stratifications were determined according to the 2008 NIH criteria. Pre- and post-CEUS findings were reviewed. Tumor size, lobular border, heterogeneity, cystic areas, calcification and intratumoral gas on US, irregular vessels, heterogeneous enhancement, and non-enhancing areas on CEUS were compared among different risk groups of GISTs. The relationship between time-intensity curve parameters and risk stratification was also analyzed.Results: Larger lesion size, lobulation, and cystic areas were associated with higher risk (P<0.05); however, margin, heterogeneity, calcification or intratumoral gas on US did not show significant association with tumor risk (P>0.05). Visualization of intratumoral irregular vessels and non-enhancing areas on CEUS were significantly correlated with higher risk classification (P<0.001), but heterogeneous enhancement was not. Quantitative analysis of time-intensity curve by CEUS showed that higher enhanced intensity (EI) was correlated with higher tumor risk, whereas arrival time (AT), time to peak enhancement (TTP), and area under the curve (AUC) were not correlated with tumor risk.Conclusions: The combination of conventional US and CEUS provides valuable information for preoperative risk stratification of GISTs.
Contrast-enhanced ultrasound
Value (mathematics)
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Vascularity is one of the determining factors of successful bone regeneration. This prospective study focused on quantifying the microperfusion of tibial non-unions with contrast-enhanced ultrasound (CEUS) and comparing it to the outcome.
Vascularity
Contrast-enhanced ultrasound
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Contrast-enhanced ultrasound
Neuroradiology
Interventional radiology
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Neuroradiology
Pediatric Radiology
Task force
Contrast-enhanced ultrasound
Interventional radiology
Diagnostic ultrasound
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This case series describes changes in size, vascularity, and cul‐de‐sac fluid in 30 patients with ectopic pregnancies who were treated with systemic methotrexate. Pretreatment and posttreatment transvaginal sonography of the ectopic pregnancies was performed with color Doppler imaging, and the images were assessed for changes in size, vascularity, and cul‐de‐sac free fluid. There was a trend for nonresponders to show increased vascularity on serial examinations, although this finding was also seen in a single responder. There was also a trend for nonresponders with increased vascularity to be associated with a greater increase in β‐human chorionic gonadotropin levels and responders with decreased vascularity to be associated with a greater decrease in β‐human chorionic gonadotropin levels.
Vascularity
Human chorionic gonadotropin
Color doppler
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Contrast-enhanced ultrasound
Ex vivo
Machine Perfusion
Parenchyma
Extracorporeal
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Introduction: Contrast-enhanced sonography is a useful tool for evaluating the vascularity of liver tumors, because it allows visualization of the blood perfusion. Moreover, the method is simple, easy, and minimal invasive, being usually performed on an out-patient basis.
Vascularity
Contrast-enhanced ultrasound
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Contrast-enhanced ultrasound
Characterization
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