9 documents found, page 1 of 1

Segmentation algorithms for ear image data towards biomechanical studies

In recent years, the segmentation, i.e. the identification, of ear structures in video-otoscopy, computerised tomography (CT) and magnetic resonance (MR) image data, has gained significant importance in the medical imaging area, particularly those in CT and MR imaging. Segmentation is the fundamental step of any automated technique for supporting the medical diagnosis and, in particular, in biomechanics studies...

The influence of muscles activation on the dynamical behaviour of the tympano-o...

The human ear is a complex biomechanical system and is divided into three parts: outer, middle and inner ear. The middle ear is formed by ossicles (malleus, incus and stapes), ligaments, muscles and tendons, which transfers sound vibrations from the eardrum to the inner ear, linking with mastoid and Eustachian tube. In this work, a finite element modelling of the tympano-ossicular system of the middle ear was d...

A method to automatically segment the internal ear structures in CT images

Hereby it is presents a novel methodology to segment the internal structures of the human ear based on image registration. The first step of the methodology concerns the registration of the volumetric image to be segmented with a reference volumetric image previously defined and manually segmented. Then, the geometric transformation found in the registration step is applied to the image to be segmented and cons...

Stapedotomy-hough technique to correct otosclerosis

The stapes, the smallest bone in the human body, is the third component in the tympano-ossicular chain of the middle ear. Otosclerosis is a disease that can cause stapes fixation, resulting in different kind of hearing losses. It is a disorder that involves the growth of abnormal bone around stapes footplate. The tonal and vocal audiometry, tympanometry, and acoustic reflexes, are the most used diagnostic tests...

Myringosclerosis and Otosclerosis - their effects in the stapes footplate

Métodos de segmentação para modelação 3D do ouvido a partir de imagens

Algoritmos computacionais para segmentação de imagens do ouvido interno

The influence of the mechanical behaviour of the middle ear ligaments: a finite...

The interest in computer modelling of biomechanical systems, mainly by using the finite element method (FEM), has been increasing, in particular for analysis of the mechanical behaviour of the human ear. In this work, a finite element model of the middle ear was developed to study the dynamic structural response to harmonic vibrations for distinct sound pressure levels applied on the eardrum. The model includes...

Segmentação e reconstrução 3D de estruturas em imagens médicas : comparação ent...