Faculty Profiles - Deguchi Daisuke

Papers - Deguchi Daisuke

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Development of a Virtual Needle Biopsy Simulation System for the Virtual Prostate Reviewed

Daisuke Deguchi, Kensaku Mori, Yoshito Mekada, Jun-ichi Hasegawa, Junichiro Toriwaki, Masanori Noguchi

Systems and Computers in Japan Vol. 37 ( 1 ) page： 93 - 104 2006.1

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

This paper discusses the virtual prostate needle biopsy system and the construction of the virtual prostate model, considering the actual distribution of prostate abnormalities. A needle biopsy simulation is performed for the constructed virtual prostate, and the actual biopsy procedure in the clinical situation is evaluated. The prostate needle biopsy is a histologic diagnosis procedure in which a sample is acquired from the prostate tissue by needle biopsy and is inspected under a microscope. In order to achieve reliable prostate needle biopsy, it is necessary to consider systematically and numerically the number of needles required, and their locations and insertion angles.
For such a purpose, a system is developed in which a virtual prostate is constructed on a computer and the biopsy procedure is evaluated quantitatively by performing virtually the prostate needle biopsy. Furthermore, two different models are constructed, for the prostate with and without hypertrophy, based on the actual statistical distribution data for
prostate abnormalities. Each model is partitioned into the peripheral zone and the transition zone. The constructed
virtual prostate is input into the virtual needle biopsy simulation system, and three different systematic biopsy procedures actually used at clinical sites, and four different needle biopsy procedures, are experimentally evaluated.
The experiments show that the insertion angle that maximizes the hit probability is not always the same as the
insertion angle that maximizes cancer sample acquisition. It is evident that the proposed method can indicate a biopsy
procedure which realizes a high hit probability with a small number of needles.

DOI： 10.1002/scj.20181

Hybrid Bronchoscope Tracking Using a Magnetic Tracking Sensor and Image Registration Reviewed

Kensaku Mori, Daisuke Deguchi, Kenta Akiyama, Takayuki Kitasaka, Calvin R. Maurer Jr., Yasuhito Suenaga, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori

Proceedings of the 8th International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI2005) Vol. LNCS 3750, Part II page： 543 - 550 2005.10

A method for bronchoscope tracking by combining a position sensor and image registration Reviewed

Daisuke Deguchi, Kenta Akiyama, Takayuki Kitasaka, Kensaku Mori, Yasuhito Suenaga, Jun-ichi Hasegawa, Junichiro Toriwaki, Hirotsugu Takabatake, Masaki Mori, Hiroshi Natori

Proceedings of the 19th International Congress and Exhibition on Computer Assisted Radiology and Surgery (CARS2005) Vol. 1281 page： 630 - 635 2005.6

Development of a method for automated liver region extraction from contrasted 3D abdominal X-ray CT images Reviewed

Yuichiro Hayashi, Daisuke Deguchi, Kensaku Mori, Yoshito Mekada, Yasuhito Suenaga, Junichiro Toriwaki

Journal of Computer Aided Diagnosis of Medical Images Vol. 8 ( 1_3 ) page： 18 - 30 2004.11

Fast and Accurate Bronchoscope Tracking using Image Registration and Motion Prediction Reviewed

Jiro Nagao, Kensaku Mori, Tsutomu Enjoji, Daisuke Deguchi, Takayuki Kitasaka, Yasuhito Suenaga, Jun-ichi Hasegawa, Junichiro Toriwaki, Hirotsugu Takabatake, Hiroshi Natori

Proceedings of the 7th International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI2004) Vol. LNCS 3217, Part II page： 551 - 558 2004.9

Improved camera-tracking method by combining motion prediction and image registration for bronchoscope navigation system Reviewed

Kensaku Mori, Tsutomu Enjoji, Daisuke Deguchi, Takayuki Kitasaka, Yasuhito Suenaga, Junichiro Toriwaki, Hiroshi Natori, Hirotsugu Takabatake

Proceedings of the 18th International Congress and Exhibition on Computer Assisted Radiology and Surgery (CARS2004) Vol. 1268 page： 1261 2004.6

New image similarity measures for bronchoscope tracking based on image registration between virtual and real bronchoscopic images Reviewed

Kensaku Mori, Tsutomu Enjoji, Daisuke Deguchi, Takayuki Kitasaka, Yasuhito Suenaga, Junichiro Toriwaki, Hirotsugu Takabatake, Hiroshi Natori

Proceedings of SPIE Medical Imaging 2004 Vol. 5639 page： 165 - 176 2004.2

Development of a simulation system of the virtual needle biopsy for the virtual prostate Reviewed

Daisuke Deguchi, Kensaku Mori, Yoshito Mekada, Jun-ichi Hasegawa, Junichiro Toriwaki, Masanori Noguchi

IEICE Transactions on Information and Systems Vol. J87-D-II ( 1 ) page： 281 - 289 2004.1

New Image Similarity Measure for Bronchoscope Tracking Based on Image Registration Reviewed

Daisuke Deguchi, Kensaku Mori, Yasuhito Suenaga, Jun-ichi Hasegawa, Junichiro Toriwaki, Hirotsugu Takabatake, Hiroshi Natori

Proceedings of the 6th International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI2003) Vol. LNCS 2878 page： 399 - 406 2003.11

New calculation method of image similarity for endoscope tracking based on image registration in endoscope navigation Reviewed

Daisuke Deguchi, Kensaku Mori, Yasuhito Suenaga, Jun-ichi Hasegawa, Junichiro Toriwaki, Hiroshi Natori, Hirotsugu Takabatake

Proceedings of the 17th International Congress and Exhibition on Computer Assisted Radiology and Surgery (CARS2003) Vol. 1256 page： 460 - 466 2003.6

Tracking of a bronchoscope using epipolar geometry analysis and intensity-based image registration of real and virtual endoscopic images Reviewed

Kensaku Mori, Daisuke Deguchi, Jun Sugiyama, Yasuhito Suenaga, Junichiro Toriwaki, Calvin R. Maurer Jr., Hirotsugu Takabatake, Hiroshi Natori

Medical Image Analysis Vol. 6 page： 321 - 336 2002.9

Language：English Publishing type：Research paper (scientific journal)

This paper describes a method for tracking the camera motion of a flexible endoscope, in particular a bronchoscope, using epipolar geometry analysis and intensity-based image registration. The method proposed here does not use a positional sensor attached to the endoscope. Instead, it tracks camera motion using real endoscopic (RE) video images obtained at the time of the procedure and X-ray CT images acquired before the endoscopic examination. A virtual endoscope system (VES) is used for generating virtual endoscopic (VE) images. The basic idea of this tracking method is to find the viewpoint and view direction of the VES that maximizes a similarity measure between the VE and RE images. To assist the parameter search process, camera motion is also computed directly from epipolar geometry analysis of the RE video images. The complete method consists of two steps: (a) rough estimation using epipolar geometry analysis and (b) precise estimation using intensity-based image registration. In the rough registration process, the method computes camera motion from optical flow patterns between two consecutive RE video image frames using epipolar geometry analysis. In the image registration stage, we search for the VES viewing parameters that generate the VE image that is most similar to the current RE image. The correlation coefficient and the mean square intensity difference are used for measuring image similarity. The result obtained in the rough estimation process is used for restricting the parameter search area. We applied the method to bronchoscopic video image data from three patients who had chest CT images. The method successfully tracked camera motion for about 600 consecutive frames in the best case. Visual inspection suggests that the tracking is sufficiently accurate for clinical use. Tracking results obtained by performing the method without the epipolar geometry analysis step were substantially worse. Although the method required about 20 s to process one frame, the results demonstrate the potential of image-based tracking for use in an endoscope navigation system.

DOI： 10.1016/S1361-8415(02)00089-0

Camera motion tracking of real bronchoscope using epipolar geometry analysis and CT derived bronchoscopic images Reviewed

Daisuke Deguchi, Kensaku Mori, Jun-ichi Hasegawa, Junichiro Toriwaki, Hirotsugu Takabatake, Hiroshi Natori

Proceedings of SPIE Medical Imaging 2002 Vol. 4683 page： 30 - 41 2002.2

A method for tracking the camera motion of real endoscope by epipolar geometry analysis and virtual endoscopy system Reviewed

Kensaku Mori, Daisuke Deguchi, Jun-ichi Hasegawa, Yasuhito Suenaga, Junichiro Toriwaki, Hirotsugu Takabatake, Hiroshi Natori

Proceedings of the 4th International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI) 2001 Vol. LNCS 2208 page： 1 - 8 2001.10

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