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Multimodal neurosurgery force feedback system based on mesh fusion modeling

Kuroda Y., Kamada K., Hayashi Y., Imura M., Oshiro O.

Biocybernetics and Biomedical Engineering

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2011

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Vol. 31, no. 2

33-50

EN

Virtual reality based force feedback system is spotlighted as a safe and efficient training environment to obtain surgical skills. Neurosurgery utilizes multimodal patient images for visualization of a variety of functions in head. The aim of this study is to establish a concept of multimodal neurosurgery force feedback system based on mesh fusion modeling. In the model of mesh fusion, we developed an algorithm to detect overlapped region between the multiple meshes that are obtained from multimodal images, and to determine a new boundary between the meshes. Then, the method solved interaction between the newly defined mesh boundaries using the interaction model based on a finite element method. The proposed method was implemented, and applied to both simple and patient datasets for evaluating its applicability. As a result, the method succeeded to be applied to both simple and patient datasets. Finally, we demonstrated the early stage of the surgical approach in neurosurgery. Simulation results showed a real-time simulation of brain tissue deformation with force feedback.

2

Method to develop pseudo three-dimensional dental image from dental panoramic radiograph

Kuroda T., Kaga T., Azuma H., Yagi M., Kuroda Y., Imura M., Oshiro O., Takada T.

Biocybernetics and Biomedical Engineering

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2011

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Vol. 31, no. 2

59-70

EN

Although three-dimensional imaging can be a powerful tool for dentists to explain treatments to patients, obtaining of three-dimensional image of teeth in general dental clinics is difficult. This paper proposed a method to develop pseudo three-dimensional dental image from conventional dental panoramic radiograph and dental impression. The method estimates imaging parameters of given panoramic radiograph through comparison with dental cast, and re-projects the radiograph into three-dimensional space. The developed pseudo three-dimensional image gives clear impression of the patient's dental condition.

3

Ubiquitous tele-echography system: downsized wearable ultrasound probe with distributed processors and displays

Masuda Y., Naganawa M., Sasaki H., Suenaga T., Yutani A., Yasumuro Y., Imura M., Manabe Y., Oshiro O., Chihara K.

Biocybernetics and Biomedical Engineering

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2007

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Vol. 27, no. 1-2

247-251

EN

In the ubiquitous multi-media computing environment, medical imaging hardware can share its components such as display or logic over the network. In this paper, a compact tele-echography system that works on the distributed network environment is presented. The system is a hand-held size ultrasound sensory probe connected to a wearable computer with wireless networking facility. To adapt various imaging media in the ubiquitous computing environment, raw echo data are transmitted instead of pre-rendered image.

4

Real-time 3D ultrasound imaging using laser-induced breakdown

Yasumoro Y., Oshiro O., Chihara K., Doi M., Sugiura T., Kawada S.

Biocybernetics and Biomedical Engineering

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2002

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Vol. 22, no. 4

3-16

EN

In this paper, we propose a new framework of ultrasonic (US) three-dimensional (3D) imaging, introducing laser-induced breakdown (LIB) as an acoustic source. LIB is a phenomenon in which substances transformed to plasma by a pulsed laser beam. LIB explosively emits a variety of energies such as heat, light and sound that also includes pulsed ultrasound. Emitted US waves have suitable characteristics for instantenous US imaging in terms of low directivity to enable a wide view and sharply pulsed waves to enhance the resolution. Utilizing these characteristics, we attempt to apply the synthetic aperture method for frontal 3D imaging in a real-time process. Experimental results show that even sparsely arrayed sensors allow a wider frontal view than that can be achieved in the case using existing transducer devices.