scholarly journals Inverse Problem for Color Doppler Ultrasound-Assisted Intracardiac Blood Flow Imaging

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Jaeseong Jang ◽  
Chi Young Ahn ◽  
Jung-Il Choi ◽  
Jin Keun Seo
Keyword(s):  
Inverse Problem ◽  
Blood Flow ◽  
Stokes Equations ◽  
Color Doppler ◽  
Interaction Model ◽  
Mathematical Framework ◽  
Flow Data ◽  
Echocardiographic Image ◽  
Intracardiac Blood Flow ◽  
Reconstruction Model

For the assessment of the left ventricle (LV), echocardiography has been widely used to visualize and quantify geometrical variations of LV. However, echocardiographic image itself is not sufficient to describe a swirling pattern which is a characteristic blood flow pattern inside LV without any treatment on the image. We propose a mathematical framework based on an inverse problem for three-dimensional (3D) LV blood flow reconstruction. The reconstruction model combines the incompressible Navier-Stokes equations with one-direction velocity component of the synthetic flow data (or color Doppler data) from the forward simulation (or measurement). Moreover, time-varying LV boundaries are extracted from the intensity data to determine boundary conditions of the reconstruction model. Forward simulations of intracardiac blood flow are performed using a fluid-structure interaction model in order to obtain synthetic flow data. The proposed model significantly reduces the local and global errors of the reconstructed flow fields. We demonstrate the feasibility and potential usefulness of the proposed reconstruction model in predicting dynamic swirling patterns inside the LV over a cardiac cycle.

Three-dimensional color Doppler reconstruction of intracardiac blood flow in patients with different heart valve diseases

2000 ◽  
Vol 86 (12) ◽  
pp. 1343-1348 ◽  
Author(s):  
Raffaele De Simone ◽  
Gerald Glombitza ◽  
Christian Friedrich Vahl ◽  
Hans Peter Meinzer ◽  
Siegfried Hagl
Keyword(s):  
Blood Flow ◽  
Heart Valve ◽  
Color Doppler ◽  
Three Dimensional ◽  
Heart Valve Diseases ◽  
Valve Diseases ◽  
Intracardiac Blood Flow

A case of prenatal diagnosis of corpus callosum lipoma

2020 ◽  
Author(s):  
A.I. Zamiatina, M.V. Medvedev
Keyword(s):  
Magnetic Resonance Imaging ◽  
Blood Flow ◽  
Prenatal Diagnosis ◽  
Magnetic Resonance ◽  
Corpus Callosum ◽  
Color Doppler ◽  
Septum Pellucidum ◽  
Resonance Imaging

A case of prenatal diagnosis of the corpus callosum lipoma at 32–33 weeks of gestation is presented. In a consultative examination, a hyperechoic formation with clear contours was found in the projection of the septum pellucidum, occupying the rostrum, genu, and truncus of corpus callosum, without signs of intratumorally blood flow in the color Doppler mapping mode. The prenatal diagnosis of "callosum lipoma" was established, confirmed after the birth of a child during magnetic resonance imaging.

scholarly journals AB1076 COLOR DOPPLER HIGH- FREQUENCY ULTRASOUND OF DIGITAL ARTERIES IN PATIENTS WITH SYSTEMIC SCLEROSIS

2020 ◽  
Vol 79 (Suppl 1) ◽  
pp. 1827.3-1827
Author(s):  
O. Alekseeva ◽  
N. Yudkina ◽  
A. Demina ◽  
A. Volkov ◽  
E. Nasonov
Keyword(s):  
Blood Flow ◽  
Systemic Sclerosis ◽  
Color Doppler ◽  
Laboratory Data ◽  
Clinical Signs ◽  
Vascular Complications ◽  
Nailfold Capillaroscopy ◽  
Exclusion Criterion ◽  
Digital Ulcers ◽  
Linear Probe

Background:Systemic sclerosis (SSc) can lead to vascular complications such as digital ulcers or pitting scars (DU/PS). These changes develop in most patients with SSc and exacerbate their condition. However, there are no methods for dynamic assessment of the vascular involvement. The dynamics of capillaroscopic changes is very slow.Objectives:The aim of the study was to compare blood flow parameters of digital arteries in SSc patients and healthy individuals and to compare with nailfold capillaroscopy and clinical signs of ischemia (DU/PS).Methods:32 SSc patients, mean age 49,5 [42,0; 59,0] yrs and 26 ‘healthy’, mean age 43,5 [33,0; 57,0], were included. Groups of patients differed by gender and age. The exclusion criterion was the presence of obliterating vascular disease of the upper extremities. An Esaote MyLab Twice US system with 22 MHz linear probe was used. A total of SSc patients and controls underwent Color Doppler ultrasonography (CDUS) of 376 (256 + 208) digital arteries to compare blood flow velocity, resistive indices (RIs) and presence of occlusion. Nailfold capillaroscopy, clinical and laboratory data were also evaluated.Results:In digital arteries, pulsatility index (PI), peak systolic velocity (PSV) and end-diastolic velocity (EDV) were significantly lower and RI higher in SSc patients compared with controls (PSV: 13,28 [9,88; 16,7] vs17,45 [12,65; 22,5] cm/s, p=0,008; EDV: 2,68 [1,78, 4,05] vs 6,37 [4,75; 8,5] cm/s, p=0,000; RI: 0,78 [0,69; 0,81] vs 0,68 [0,59; 0,74], p=0,005; PI: 1,73 [1,32; 2,19] vs 1,22 [0,99; 1,55], p=0,002).We did not find any correlation between two methods. Also, we did not reveal any correlation between DU/PS, clinical, laboratory data and CDUS, but we found relationship between DU/PS and avascular areas or capillaroscopic findings (r= 0,37, p=0,045 and r= 0,40, p=0,03 correspondingly).Conclusion:Blood flow is significantly decreased in digital arteries in SSc, but clinical features of vasculopathy depend on microcirculatory disorders. It is important to continue research to find methods for dynamic evaluation of microcirculatory changes.References:noDisclosure of Interests:None declared

scholarly journals Improved color Doppler for cerebral blood flow axial velocity imaging

2020 ◽  
pp. 1-1
Author(s):  
Jianbo Tang ◽  
Kivilcim Kilic ◽  
Thomas L. Szabo ◽  
David A. Boas
Keyword(s):  
Blood Flow ◽  
Cerebral Blood Flow ◽  
Axial Velocity ◽  
Color Doppler ◽  
Velocity Imaging

COMPUTATIONS OF PULSATILE AORTIC BLOOD FLOW PROBLEMS ON PARALLEL COMPUTERS

2003 ◽  
Vol 15 (03) ◽  
pp. 109-114
Author(s):  
YANG-YAO NIU ◽  
SHOU-CHENG TCHENG
Keyword(s):  
Blood Flow ◽  
Stokes Equations ◽  
Computing Time ◽  
Time Integration ◽  
Parallel Computer ◽  
Aortic Blood Flow ◽  
Pc Cluster ◽  
Flow Problems ◽  
Aortic Blood ◽  
Speed Up

In this study, a parallel computing technology is applied on the simulation of aortic blood flow problems. A third-order upwind flux extrapolation with a dual-time integration method based on artificial compressibility solver is used to solve the Navier-Stokes equations. The original FORTRAN code is converted to the MPI code and tested on a 64-CPU IBM SP2 parallel computer and a 32-node PC Cluster. The test results show that a significant reduction of computing time in running the model and a super-linear speed up rate is achieved up to 32 CPUs at PC cluster. The speed up rate is as high as 49 for using IBM SP2 64 processors. The test shows very promising potential of parallel processing to provide prompt simulation of the current aortic flow problems.

Qualitative Diagnosis of Solid Breast Mass by Blood Flow in Solid Breast Mass Based on Color Doppler Ultrasound

2021 ◽  
Vol 11 (6) ◽  
pp. 1608-1615
Author(s):  
Ding Zuopeng ◽  
Liu Weiyong ◽  
Hu Chunmei ◽  
Wang Tao ◽  
Wang Mingming
Keyword(s):  
Breast Cancer ◽  
Blood Flow ◽  
Differential Diagnosis ◽  
Color Doppler ◽  
Flow Characteristics ◽  
Flow Distribution ◽  
Color Doppler Ultrasound ◽  
Blood Flow Distribution ◽  
Breast Masses ◽  
Malignant Breast

The incidence of breast cancer ranks first among female malignant tumor. With the increase of the sensitivity of color Doppler ultrasound blood flow, the blood flow distribution in and around the tumor can be clearly displayed, and the analysis of hemodynamic parameters is provided, which provides convenience for the study of tumor blood flow characteristics. Studies have shown that tumor cells can secrete a substance called angiogenesis factor, which makes the tumor site form a rich vascular network to promote tumor growth and metastasis. The tumor has many new blood vessels, abnormal structure, thin wall, lack of muscle layer, and is prone to form arteriovenous rash. These characteristics provide a pathological basis for color Doppler flow imaging (CDFI) for the diagnosis of breast cancer. This article discusses the role of two-dimensional sonographic features in the differential diagnosis of benign and malignant breast masses, CDFI was used to study the blood flow distribution and hemodynamic characteristics in benign and malignant breast masses; explore the value of blood flow characteristics and blood flow parameters in the differential diagnosis of breast masses. The experimental results show that the detection rate of blood flow signals and the classification of blood flow signals in the malignant group are higher than those in the benign group, mainly level II and III blood flow, and the irregular branched blood flow is more common, especially when the tumor appears penetrating blood flow supports the diagnosis of malignancy. PSV, RI and PI have a certain differential meaning in the diagnosis of benign and malignant breast masses. PSV, RI and PI of malignant masses are higher than benign masses. For tumors without obvious necrosis, the larger the tumor diameter, the richer the blood flow and the higher the blood flow grade is. The malignant tumors have more blood flow than the benign ones.

scholarly journals Capillary hemangioma of the scrotum mimicking an epididymal tumor: Case report

2014 ◽  
Vol 86 (4) ◽  
pp. 395 ◽  
Author(s):  
Antonio Vavallo ◽  
Francesco Lafranceschina ◽  
Giuseppe Lucarelli ◽  
Carlo Bettocchi ◽  
Pasquale Ditonno ◽  
...  
Keyword(s):  
Blood Flow ◽  
Case Report ◽  
Color Doppler ◽  
Capillary Hemangioma ◽  
Scrotal Mass ◽  
Scrotal Ultrasound ◽  
Pathological Evaluation

We report a case of capillary hemangioma of the scrotum. A 52-year-old male presented with a left scrotum swelling that had arisen suddenly two months before. Scrotal ultrasound revealed a dishomogeneous mass in the left scrotum. The mass demonstrated blood flow in the color Doppler mode. Scrotal mass excision was performed. Pathological evaluation revealed a capillary hemangioma.

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