We present an original visual guidance system in the especially difficult context of robot assisted coronary artery bypass graft. the overlay of a preoperative coronary tree model on the endoscopic images is initializ...
详细信息
We present an original visual guidance system in the especially difficult context of robot assisted coronary artery bypass graft. the overlay of a preoperative coronary tree model on the endoscopic images is initialized to help the surgeon to locate himself. then the surgeon points some landmarks observed in the operating field during the motion of the endoscope. the overlay is corrected in real-time and the landmarks are automatically identified through a multi-model estimation method until the precision necessary to the localization of the surgical targets is reached. the first in vivo experiment, presented here, has shown the efficiency of the system by identifying the main arteries in a few clicks.
We describe a new approach to predicting the maximum target registration error for fiducial registration. the approach is based on the analysis of a spatial stiffness model that produces an analytic expression of the ...
详细信息
We describe a new approach to predicting the maximum target registration error for fiducial registration. the approach is based on the analysis of a spatial stiffness model that produces an analytic expression of the maximum error that is closely related to the formula reported in Fitzpatrick et al. the methodology we used was developed by Lin et al. the analytic stiffness results yield error estimates that closely match those from numerical simulations.
In addition to the widely-used Shannon mutual information, generalized information-theoretic similarity metrics have properties that make them conducive to biomedicalimage registration. the mutual information based o...
详细信息
In this paper first results in clinical evaluation of a new mobile image viewing device are described. the system comprises a compact and mobile viewing device that can be tracked by an optical position sensor. It is ...
详细信息
In this paper first results in clinical evaluation of a new mobile image viewing device are described. the system comprises a compact and mobile viewing device that can be tracked by an optical position sensor. It is capable of displaying reasonable parts of a medicalimage data set (i.e. CT) on its screen in relation to the spatial position regarding a patient. this article describes first results and application details in applying this viewing device to clinical indications in maxillofacial surgery.
this paper deals with topology preservation in the framework of 3-D image registration using a multiscale parametric deformation field model. Using a B-spline deformation field yields a polynomial closed form expressi...
详细信息
We present a systematic approach to generate pixel-wise parametric maps from contrast-enhanced MR myocardial perfusion images. A surface coil intensity correction algorithm is used to compensate the myocardial intensi...
详细信息
Previous research on Trans-urethral Ultrasound (TUUS) imaging has shown promise that TUUS will become a viable new intra-operative tool. Prior work focused on the processing of TUUS data in order to obtain useful clin...
详细信息
ISBN:
(数字)9783540399032
ISBN:
(纸本)9783540204640
Previous research on Trans-urethral Ultrasound (TUUS) imaging has shown promise that TUUS will become a viable new intra-operative tool. Prior work focused on the processing of TUUS data in order to obtain useful clinical information, however intra-operative imaging issues (real-time feedback) have not been fully addressed. this paper describes a unique framework for efficient processing which can be used for intra-operative imaging. the methods describe a segmentation pipeline which meet the requirements of intra-operative imaging in prostate brachytherapy. the implementation of the process is described and the process is evaluated for efficiency and accuracy.
Early detection is the most promising way to enhance a patient's chance for survival of lung cancer, In this work, a novel computer algorithm for nodule detection in chest radiographs is presented that takes into ...
详细信息
Early detection is the most promising way to enhance a patient's chance for survival of lung cancer, In this work, a novel computer algorithm for nodule detection in chest radiographs is presented that takes into account the wide size range for lung nodules through the use of multi-scale image processing techniques. the method consists of: i) Lung field segmentation with an Active Shape Model;ii) Nodule candidate detection by Lindeberg's multi-scale blob detector and quadratic classification;iii) Blob segmentation by multi-scale edge focusing;iv) k Nearest neighbor classification. Experiments on the complete JSRT database show that by accepting on average 2 false positives per image, 50.6% of all nodules are detected. For 10 false positives, this increases to 69.5%.
In radiation therapy, patient positioning uncertainty and organ motion require that a volume larger than the actual tumour (named the planning target volume [PTV]) be irradiated to ensure that the tumour receives the ...
详细信息
Helical tomotherapy, a new approach for Intensity Modulated Radiation therapy, employs a fan-beam of radiation from a source mounted in a CT-like ring gantry. Complex conformal dose delivery is achieved by modulating ...
详细信息
暂无评论