RESUMO
The anatomy and motion of the heart and the aorta are essential for patient-specific simulations of cardiac electrophysiology, wall mechanics and hemodynamics. Within the European integrated project euHeart, algorithms have been developed that allow to efficiently generate patient-specific anatomical models from medical images from multiple imaging modalities. These models, for instance, account for myocardial deformation, cardiac wall motion, and patient-specific tissue information like myocardial scar location. Furthermore, integration of algorithms for anatomy extraction and physiological simulations has been brought forward. Physiological simulations are linked closer to anatomical models by encoding tissue properties, like the muscle fibers, into segmentation meshes. Biophysical constraints are also utilized in combination with image analysis to assess tissue properties. Both examples show directions of how physiological simulations could provide new challenges and stimuli for image analysis research in the future.
Assuntos
Aorta/anatomia & histologia , Aorta/fisiologia , Coração/anatomia & histologia , Coração/fisiologia , Modelos Cardiovasculares , Algoritmos , Simulação por Computador , Angiografia Coronária , Técnicas Eletrofisiológicas Cardíacas , Hemodinâmica , Humanos , Imageamento Tridimensional , Angiografia por Ressonância Magnética , Medicina de PrecisãoRESUMO
AIM: To evaluate the use of preoperative optical coherence tomography (OCT) findings as predictive factors for macular hole (MH) surgery outcomes. METHODS: 46 eyes from 46 patients with a diagnosis of MH were included in this study. In all cases, a pars plana 25-gauge vitrectomy with peeling of the internal limiting membrane was performed. Before and after surgery, a complete clinical examination and a detailed macular analysis, which included the MH minimum and base diameter, the MH height, the Macular Hole Index (MHI), Diameter Hole Index (DHI) and Tractional Hole Index (THI), were performed. Predictive factors for visual prognosis after surgery were obtained by receiver operating characteristic curve analysis. RESULTS: Minimum and base diameter as well as THI and MHI correlated significantly (p<0.01, p = 0.01, p = 0.04, p = 0.03, respectively) with postoperative best spectacle corrected visual acuity at 3 months, but DHI and MH height did not. Cut-off values of 311 microm and 1.41 were obtained for the minimum diameter and THI, respectively, from receiver operating characteristic curve analysis, providing an acceptable sensitivity and specificity. CONCLUSION: An MH minimum diameter of <311 microm or a THI >1.41 are predictive factors for a good visual prognosis after MH surgery.
