Combining position-based dynamics and gradient vector flow for 4D mitral valve segmentation in TEE sequences.
Int J Comput Assist Radiol Surg
; 15(1): 119-128, 2020 Jan.
Article
en En
| MEDLINE
| ID: mdl-31598891
ABSTRACT
PURPOSE:
For planning and guidance of minimally invasive mitral valve repair procedures, 3D+t transesophageal echocardiography (TEE) sequences are acquired before and after the intervention. The valve is then visually and quantitatively assessed in selected phases. To enable a quantitative assessment of valve geometry and pathological properties in all heart phases, as well as the changes achieved through surgery, we aim to provide a new 4D segmentation method.METHODS:
We propose a tracking-based approach combining gradient vector flow (GVF) and position-based dynamics (PBD). An open-state surface model of the valve is propagated through time to the closed state, attracted by the GVF field of the leaflet area. The PBD method ensures topological consistency during deformation. For evaluation, one expert in cardiac surgery annotated the closed-state leaflets in 10 TEE sequences of patients with normal and abnormal mitral valves, and defined the corresponding open-state models.RESULTS:
The average point-to-surface distance between the manual annotations and the final tracked model was [Formula see text]. Qualitatively, four cases were satisfactory, five passable and one unsatisfactory. Each sequence could be segmented in 2-6 min.CONCLUSION:
Our approach enables to segment the mitral valve in 4D TEE image data with normal and pathological valve closing behavior. With this method, in addition to the quantification of the remaining orifice area, shape and dimensions of the coaptation zone can be analyzed and considered for planning and surgical result assessment.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Ecocardiografía Transesofágica
/
Ecocardiografía Tetradimensional
/
Cirugía Asistida por Computador
/
Procedimientos Quirúrgicos Cardíacos
/
Válvula Mitral
/
Insuficiencia de la Válvula Mitral
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Int J Comput Assist Radiol Surg
Asunto de la revista:
RADIOLOGIA
Año:
2020
Tipo del documento:
Article
País de afiliación:
Alemania