Motion-aware stroke volume quantification in 4D PC-MRI data of the human aorta.

Purpose: 4D PC-MRI enables the noninvasive measurement of time-resolved, three-dimensional blood flow data that allow quantification of the hemodynamics. Stroke volumes are essential to assess the cardiac function and evolution of different cardiovascular diseases. The calculation depends on the wall position and vessel orientation, which both change during the cardiac cycle due to the heart muscle contraction and the pumped blood.

Delayed enhancement imaging in a contemporary patient cohort following correction of tetralogy of Fallot.

Objective: To test the hypothesis that myocardial scars after repair of tetralogy of Fallot are related to impaired cardiac function and adverse clinical outcome.

Methods: A total of 53 patients were retrospectively analysed after repair of tetralogy of Fallot. The median patient age was 20 years (range 2-48).

The LiverAnatomyExplorer: a WebGL-based surgical teaching tool.

The LiverAnatomyExplorer is a real-time surgical teaching tool based on state-of-the-art Web technologies such as SVG (Scalable Vector Graphics), X3D (Extensible3D), and WebGL (Web Graphics Library). Unlike other medical e-learning systems, the LiverAnatomyExplorer combines traditional clinical 2D imagery with interactive Web-based 3D models derived from patient-specific image data. The tool is enhanced by surgical videos, a self-assessment tool, and an online authoring tool with which instructors can manage the presented case studies and create multiple-choice quizzes.

Semi-automatic vortex extraction in 4D PC-MRI cardiac blood flow data using line predicates.

Cardiovascular diseases (CVD) are the leading cause of death worldwide. Their initiation and evolution depends strongly on the blood flow characteristics. In recent years, advances in 4D PC-MRI acquisition enable reliable and time-resolved 3D flow measuring, which allows a qualitative and quantitative analysis of the patient-specific hemodynamics.

Systemic right ventricles rarely show myocardial scars in cardiac magnetic resonance delayed-enhancement imaging.

Objectives: To test the hypothesis that myocardial scars cause systolic dysfunction in patients with transposition of the great arteries and a systemic right ventricle.

Methods: We retrospectively analyzed 20 consecutive patients (10 male, mean age 27.3 years) with a systemic right ventricle who underwent cardiac magnetic resonance imaging with 1.

Computer-aided diagnosis in breast DCE-MRI--quantification of the heterogeneity of breast lesions.

Purpose: In our study we aim at the quantification of the heterogeneity for differential diagnosis of breast lesions in MRI.

Materials And Methods: We tested a software tool for quantification of heterogeneity. The software tool provides a three-dimensional analysis of the whole breast lesion.