This paper presents a user-steered segmentation algorithm based on the livewire paradigm. Livewire is an image-feature driven method that finds the optimal path between user-selected image locations, thus reducing the...
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A real-time 3-D surgical navigation system that superimposes the real, intuitive 3-D image for medical diagnosis and operation was developed in this paper. This system creates 3-D image based on the principle of integ...
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Blood pool agent (BPA) contrast-enhanced magnetic resonance angiography (CE-MRA) images have been acquired during the first-pass of the contrast agent and in the steady-state. Arterial visualization, which is hampered...
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X-ray angiography provides two-dimensional projections of opacified arteries. Utilizing temporally synchronized projections, from different angles, a 3D model can be reconstructed. Biplane angiography [1] systems can ...
ISBN:
(纸本)3540426973
X-ray angiography provides two-dimensional projections of opacified arteries. Utilizing temporally synchronized projections, from different angles, a 3D model can be reconstructed. Biplane angiography [1] systems can provide two simultaneous acquisitions, but are not as widely available as single-view systems. Using the latter systems, the different projections are acquired sequentially. During the time required to change the position of the imaging system, patient motion or breathing motion may be introduced. We propose a method to construct a 3D+t model of the coronary tree from non-simultaneous sequences, synchronized with the electrocardiogram and acquired on single-view angiography systems.
We developed an augmented reality system targeting image guidance for surgical procedures. The surgeon wears a video-see-through head mounted display that provides him with a stereo video view of the patient. The live...
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The 3D ultrasound imagery becomesmore and more attractive for cardiac studies due to its simplicity, its improved reproducibility, and better precision, as compared to standard 2D echographic exams. However, automatic...
ISBN:
(纸本)3540426973
The 3D ultrasound imagery becomesmore and more attractive for cardiac studies due to its simplicity, its improved reproducibility, and better precision, as compared to standard 2D echographic exams. However, automatic tools are needed to fully and efficiently analyze the large amounts of data obtained. In this paper, we present an automatic tool, aimed at the quantitative analysis of heart motion, based on the segmentation of the endo-cardium of the left ventricle. Using our method, quantitative measurements on volumes such as stroke and ejection-fraction (EF) are readily available (without needing any geometrical assumption), as well as regional wall motion parameters.
The evaluation of cortical damage to the kidneys, especially in children, is currently performed by means of Tc99m-DMSA renal scan. The routine involves the acquisition of planar images and their qualitative and quant...
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The 3-D representation of temporomandibular joints can be performed using magnetic resonance imaging. We carried out a MRI on an asymptomatic volunteer subject. images were reconstructed in three dimensions. This reco...
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Interactive surgery simulations have conflicting requirements of speed and accuracy. In this paper we show how to combine a relatively accurate deformation model—the Finite Element (FE) method— and interactive cutti...
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image-guided brachytherapy is a promising treatment for early stage prostate cancer. Current research emphasizes methods for intraoperative optimized planning and precise implantation of radioactive seeds. Some new te...
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