David Feindel
Posts by David Feindel:
CAAS 4D-Flow
4D-Flow: Complete assessment of your MR 4D Flow data
Caas MR 4D Flow is specifically designed to extract relevant information from 3D phase-contrast (PC) MR images, within a few clicks. Based on these phase-contrast images, two pioneering 4D Flow modules are offered to perform a complete flow analysis that can aid in reading and interpreting cardiovascular MR images and assist in planning the time and type of an intervention. These two modules include a module to analyze vessels, from the aorta up to smaller vessels in for example the kidneys (Caas MR 4D Artery), and a module to analyze the heart valves in terms of regurgitation fraction (Caas MR 4D Heart).
Key Results
- Visualization of aortic blood flow as streamlines, pathlines and color-coded vectors
- Distribution of wall shear stress and local values of wall shear stress
- Pressure difference over a segment
- Visualization and quantification of regurgitant fraction over all four valves
- 2D flow phase-contract analysis
The Wall Shear Stress Analysis and Pressure Difference Analysis are not CE marked and therefore not meant for clinical decision making.
CAAS A-Valve
CAAS A-Valve: assisting physicians during or in preparation of valve replacements as TAVR procedures.
CAAS A-Valve assists the physician in evaluating aortic regurgitation after transcatheter valve replacement. The qRA workflow (also called videodensitometry, VD-AR, LVOT-AR) enables the physician to quantify valvular and paravalvular regurgitation immediately in the hybrid OR directly after placing the valve.
Clinical confidence
qRA is extensively validated by the groups of Prof. Patrick Serruys and Prof. Carl Schulz. Validation studies have been performed in:
- Correlating with clinical endpoints to assess LVOT-AR cut-off value of 0.17
- Comparing with MR Flow measurements
- Comparing with echocardiography measurements
- Comparing with visual classification of aortic regurgitation
- Phantom setup
Use in practice
CAAS A-Valve qRA has been used to assess:
- Acute performance of a novel Xeltis valve in a pre-clinical setting
- Comparison of seven different TAVR valves
CAAS vFFR
CAAS – vFFR, module of CAAS Workstation:
The novel angio-based functional lesion assessment – wire and adenosine free.
The vFFR workflow builds a 3D reconstruction of coronary artery and assesses pressure drop, resulting in a vFFR value. Furthermore, the 3D reconstruction enables assessment of severity and percentage of stenosis.
Functional lesion information
- Pressure drops in coronary artery
- vFFR value
Anatomical lesion information
- Lesion diameter
- Percentage stenosis
- Reference diameter
- Obstruction length
Aortic Valve
Aortic Valve: Quick, easy and reliable way to plan and size for aortic valve replacement
3mensio Aortic Valve allows you to quickly and reliably pre-plan aortic valve replacement procedures (TAVR/TAVI). The workflow consists of several modules for the assessment and sizing of the aortic root and approach route assessment. Assess for each patient if the transfemoral, transsubclavian, transapical or direct aortic approach is most suitable. The software has a workflow assistant which acts as a guide through the software making it intuitive and easy to use.
Key Results
Aortic Valve
- Dimensions of the aortic annulus, the LVOT and the ascending aorta
- Coronary ostia height
- Optimal projection angle
- Calcium assessment and quantification
Femoral and Subclavian approach
- Diameter assessment with catheter-based threshold
- Dedicated views for calcium assessment
- Tortuosity assessment
Direct Aortic and Transapical approach
- Determine intercostal space using virtual catheter
- Approach angle with valve implant
Mitral Valve
Mitral Valve: Easy planning for both mitral valve repair and mitral valve replacement
Mitral regurgitation can be treated by replacing the native valve (TMVR) or by repairing the native valve (TMVr). Planning for both types of procedures can be done using the 3mensio Mitral Valve workflow. A single click allows the orientation on the mitral annulus. An assisted mitral annulus trace helps to understand the 3D shape and dimensions of the annulus.
Additional features have been developed specifically to plan for replacement or repair. Relationships with surrounding structures like the aortic valve and coronary vessels can quickly be assessed. An easy comparison between the diastole and systole phase can be performed. The approach route can be assessed using either the “Transseptal” or “Direct Access” approach module.
Key Results
General
- Dynamic visualization of mitral valve, left ventricle and left atrium
- Dimensions of mitral valve and mitral annulus
- Optimal C-arm angle
- Anatomical relations between interatrial septum, LAA ostium, mitral annulus and/or vena cava
- Volume of the left atrium or ventricle
TMVR
- Aortic-Mitral angle
- Assessment of the neo-LVOT
- Device placement using virtual device
TMVr
- Distance annulus and coronary vessels
- Assessment of anchor positions
Tricuspid Valve
Tricuspid Valve: Pre-plan percutaneous Transcatheter Tricuspid Valve repair or replacement
Tricuspid Regurgitation can be treated by repairing or replacing the native valve. This workflow is developed to pre-plan percutaneous transcatheter tricuspid valve repair or replacement. Different modules provide information on the tricuspid valve and the surrounding structures and the different approach routes that are available to access the valve.
Key Results
- Dimensions of the tricuspid valve
- Orientation of the right coronary
- Distance from the right coronary to the TV
- Trabeculae segmentation
Optimal projection angle - Device placement using virtual device
- Dimensions of superior and inferior vena cava
Pulmonary Valve
Pulmonary Valve: Quick and easy planning of Percutaneous Pulmonary Valve Implantation (PPVI) procedures
Congenital Heart Disease is a defect in the heart that is present at birth. In a group of these patients the pulmonary valve does not function properly and the valve needs to be replaced. As a prosthetic valve only has a limited lifespan these valves need to be replaced a number of times during a lifetime. Percutaneous Pulmonary Valve Implantation (PPVI) has been developed to make the procedure less invasive. 3mensio Pulmonary Valve is a dedicated workflow to plan PPVI. The automatic segmentation gives a quick overview of the patient’s anatomy. Different features enable for the assessment of the surrounding structures and the planning of a stent and valve.
Key Results
- Dimensions of the pulmonary trunk and pulmonary arteries
- Dimensions in systole and diastole
- Relationship between Pulmonary trunk and coronary arteries
- Device placement using virtual device
- Optimal C-arm position
Coronary
Coronary: Prepare your coronary procedures with the Coronary workflow
Coronary CTA can help to assess the coronary artery tree for suspect coronary artery disease in radiology and cardiology. Segment and visualize a coronary artery by a one-click segmentation of the vessel. Quantify lesions by measuring the stenosis over the vessel.
Prepare your coronary procedures with the coronary workflow of 3mensio. The simulated angio view is an interactive tool which can be used to determine the optimal C-arm projection for treatment of the diseased part of the coronary artery. Foreshortening of the vessel is indicated by with a color coding.
Calcium Scoring provides fast and easy quantification of calcifications in the coronary arteries. Classify calcifications with one click and obtain its Agatston score, volume and mass.
Key Results
Coronary Analysis
- Segmentation of the coronary artery tree
- Stenosis measurement
- Simulated angio view of the coronary artery tree
- Lumen measurements
Calcium Scoring
- Calcium volume, Agatston score and mass