scholarly journals Intraoperative power Doppler ultrasonography with contrast enhancement for brain tumors

Neurosonology ◽  
2008 ◽  
Vol 21 (1) ◽  
pp. 6-11
Author(s):  
Tetsuhiro HIGASHIDA ◽  
Hiroshi KANNO ◽  
Katsumi SAKATA ◽  
Yutaka TANABE ◽  
Hidetoshi MURATA ◽  
...  
Keyword(s):  
Brain Tumors ◽  
Contrast Enhancement ◽  
Doppler Ultrasonography ◽  
Power Doppler ◽  
Power Doppler Ultrasonography

Dynamics of contrast enhancement in MR imaging and power Doppler ultrasonography of solid breast lesions

2002 ◽  
Vol 43 (5) ◽  
pp. 492-500 ◽  
Author(s):  
H. Reinikainen ◽  
E. Paakko ◽  
I. Suramo ◽  
M. Paivansalo ◽  
J. Jauhiainen ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Contrast Enhancement ◽  
Doppler Ultrasonography ◽  
Power Doppler ◽  
Breast Lesions ◽  
Power Doppler Ultrasonography

Dynamics of contrast enhancement in MR imaging and power Doppler ultrasonography of solid breast lesions

2002 ◽  
Vol 43 (5) ◽  
pp. 492-500 ◽  
Author(s):  
H. Reinikainen ◽  
E. Pääkkö ◽  
I. Suramo ◽  
M. Päivänsalo ◽  
J. Jauhiainen ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Contrast Enhancement ◽  
Doppler Ultrasonography ◽  
Power Doppler ◽  
Breast Lesions ◽  
Power Doppler Ultrasonography ◽  
Doppler Us ◽  
Contrast Enhanced ◽  
The Us ◽  
Malignant Lesions

Purpose: To evaluate the dynamics of contrast enhancement in solid breast lesions at contrast-enhanced MR imaging and power Doppler ultrasonography (US) and to compare the methods to histology and to each other. Material and Methods: Forty breast lesions were prospectively examined with dynamic MR and power Doppler US. Time-signal intensity curves of enhancement were obtained for both methods. The shape of the curve was analyzed to be benign, indeterminate or malignant. The curves were also analyzed quantitatively by calculating the slope of the curve and the area under the curve (both methods), relative enhancement (MR), and time to peak (US). The lesions were divided into malignant lesions, fibroadenomas, and other benign lesions. The results were compared to histology. Results: In the subjective analysis of the MR curve in differentiating between benign and malignant lesions the accuracy was 90%. The MR curve also enabled differentiation between fibroadenomas and malignancies. The accuracy of the US curve was 38%. Quantitatively, statistically significant differences were found using all the MR variables, except between malignancies and fibroadenomas. Using the US variables, no significant difference was found between the groups. Conclusion: The dynamics of contrast-enhanced MR were reliable in the differential diagnosis of solid breast lesions, but contrast-enhanced power Doppler US was of limited value.

Intraoperative power Doppler ultrasonography with a contrast-enhancing agent for intracranial tumors

2005 ◽  
Vol 102 (2) ◽  
pp. 295-301 ◽  
Author(s):  
Hiroshi Kanno ◽  
Yukihiko Ozawa ◽  
Katsumi Sakata ◽  
Hidemitsu Sato ◽  
Yutaka Tanabe ◽  
...  
Keyword(s):  
Contrast Agent ◽  
Contrast Enhancement ◽  
Real Time ◽  
Doppler Ultrasonography ◽  
Power Doppler ◽  
Power Doppler Ultrasonography ◽  
Intracranial Tumors ◽  
Content Type ◽  
Tumor Parenchyma ◽  
Fine Print

Object. The goal of this study was to evaluate intraoperative power Doppler ultrasonography when used with a contrast-enhancing agent for operations on intracranial tumors. Methods. Forty intracranial tumors were examined using power Doppler ultrasonography with a galactose micro-particle—based ultrasonographic contrast-enhancing agent during operations on the brain. The tumors included 37 intracranial neoplasms (14 gliomas, six meningiomas, three hemangioblastomas, two malignant lymphomas, three other primary neoplasms, nine metastatic tumors, and three nonneoplastic lesions). All patients also underwent computerized tomography and magnetic resonance imaging, and all but three of the patients underwent digital subtraction (DS) angiography. Before injection of the ultrasonographic contrast agent, intra- and peritumoral power Doppler flow signals were detected in 32 of the intracranial tumors. After the injection, the signals were enhanced in blood vessels around the tumors and in the tumor parenchyma in 36 tumors. The duration of contrast enhancement continued for 70 to 365 seconds (mean 251.8 ± 69 seconds) after the injection. Among the tumors, hemangioblastomas displayed particularly strong contrast enhancement. In these intracranial tumors, the echo signals obtained using contrast-enhanced power Doppler ultrasonography correlated with DS angiographic staining. Power Doppler ultrasonograms with the appropriate contrast agent provided better data on the precise real-time position of the tumors and their relationship to adjacent vessels than ultrasonograms obtained before the injection of the contrast agent. Conclusions. Intraoperative power Doppler ultrasonography performed using a contrast-enhancing agent can facilitate intraoperative real-time navigation and assessment of the intratumoral vasculature and peritumoral vessels, particularly for tumors having abundant vessels such as hemangioblastomas.

scholarly journals AB0450 PERIPHERAL MACROVASCULAR INVOLVEMENT IN SYSTEMIC SCLEROSIS AS COMPARED WITH HEALTHY CONTROLS: A SMALL COHORT STUDY BY COLOR AND SPECTRAL DOPPLER ULTRASONOGRAPHY

2021 ◽  
Vol 80 (Suppl 1) ◽  
pp. 1252.2-1252
Author(s):  
R. D’alessandro ◽  
E. Garcia Gonzales ◽  
P. Falsetti ◽  
C. Baldi ◽  
F. Bellisai ◽  
...  
Keyword(s):  
Systemic Sclerosis ◽  
Clinical Features ◽  
Doppler Ultrasonography ◽  
Power Doppler ◽  
Ulnar Artery ◽  
Artery Occlusion ◽  
Power Doppler Ultrasonography ◽  
Digital Ulcers ◽  
Healthy Controls ◽  
History Of

Background:Together with autoimmune-inflammation and fibrosis, microvasculopathy is a hallmark of SSc. However, also macrovascular changes may occur including peripheral proliferative vasculopathy. Whether this changes may represent a specific SSc marker with a predictive value remains a matter of debate.[1,2,3]Objectives:To study peripheral macrovascular involvement by color doppler ultrasound (CDUS) with spectral wave analysis (SWA) in a cohort of 40 SSc patients as compared to healthy controls. To further analyze any differences among the SSc population.Methods:Forty SSc patients and 36 healthy controls were examined by CDUS with SWA of both hands. Macrovascular involvement was assessed by measuring the resistivity index (RI) of distal ulnar and radial arteries. Examinations were performed with an Esaote MyLab Twice machine equipped with a linear 10-22 MHz probe. Ultrasound examination was carried out by two independent rheumatologists blinded to clinical conditions of the patients. Statistical analysis was performed by using MaxStat software.Results:The RI index resulted increased in the SSc cohort as compared with healthy controls (left ulnar RI 0.977 vs 0.715; right ulnar RI 0.996 vs 0.699; left radial RI 0.988 vs 0.706; right radial RI 0.999 vs 0.688; p<0.001). SSc patients with an increased RI in one artery were more probable to have an increased RI in the other vessels too (r 2 = 0.35; p<0.01). In addition, 8 out of 40 SSc patients presented left ulnar artery occlusion (UAO) and 7 out of 40 SSc patients presented right UAO, of which 6 presented bilateral UAO. Awaiting to enlarge the cohort for further analysis, descriptive data regarding increased RI at CDUS/SWA and clinical features, including years from onset of the disease, subtype of SSc, mRSS, history of digital ulcers, interstitial lung disease and PAH are described in Table 1.Conclusion:Peripheral macrovascular involvement was observed in SSc patients as compared with healthy controls. Further studies will determine whether this feature may have specificity for diagnosis/prognosis in SSc.References:[1]Lescoat A, Yelnik CM, Coiffier G et al. Ulnar Artery Occlusion and Severity Markers of Vasculopathy in Systemic Sclerosis: A Multicenter Cross-Sectional Study. Arthritis Rheumatol. 2019;71:983-990.[2]Lescoat A, Coiffier G, Rouil A et al. Vascular Evaluation of the Hand by Power Doppler Ultrasonography and New Predictive Markers of Ischemic Digital Ulcers in Systemic Sclerosis: Results of a Prospective Pilot Study. Arthritis Care Res (Hoboken). 2017;69:543-551.[3]Schioppo T, Orenti A, Boracchi P, De Lucia O, Murgo A, Ingegnoli F. Evidence of macro- and micro-angiopathy in scleroderma: An integrated approach combining 22-MHz power Doppler ultrasonography and video-capillaroscopy. Microvasc Res. 2019;122:125-130.Table 1.Main clinical features of the SSc cohort (n=40) studied by CDUS for macrovascular involvement.SSc cohort (n = 40)Years from onsetrange (35 y – 0 y)mean = 10.5 yAutoantibodiesACA 13/40Anti-TopoI 14/40Other 13/40mRSSrange (0 -30)mean = 3ILD17/40PAH7/40Capillaroscopy patternEarly 10/40Active 11/40Late 6/40History of digital ulcers16/40Left ulnar IR0.977Left radial IR0.988Right ulnar IR0.996Right radial IR0.999Disclosure of Interests:None declared.

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