Satoki Zenbutsu

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OBJECTIVE At present, computed tomography (CT) is used in almost all patients with renal tumors. We aimed to investigate the relationship between visceral adipose tissue (VAT), as assessed by CT, and various other factors in patients with renal cell carcinoma (RCC). METHODS We undertook an examination of VAT in 117 male patients undergoing nephrectomy or(More)
In this study we propose an endoscopic image enhancement technique named dynamic band imaging (DBI) which temporally changes color conversion matrix. DBI is based on the estimation of multi-spectral band images to enhance the endoscopic color images in order to distinguish the slight color difference of early-stage cancer more clearly. Since this method can(More)
The probability density function (PDF) of the echo signal envelope is an important factor for ultrasound tissue characterization (TC). Fibrotic tissue is inhomogeneous; therefore, its envelope PDF cannot be accurately modeled by a single PDF. Additionally, some regions have variable scatterer densities. In order to detect and characterize the fibrotic liver(More)
OBJECTIVE For novice surgeons, successful laparoscopic radical nephrectomy depends on the treatment of the renal vessels, and the use of computed tomography assists in navigation during the surgery. METHODS To navigate during surgery, three-dimensional volume-rendered images of the renal vessels, kidneys, and surrounding organs were created(More)
In this study, a multi modality fusion imaging technique was proposed for guiding a new laparoscopic surgery method. This new method was evaluated during a phantom experiment. An advantage of this new laparoscopic surgery method is that the internal structures can be imaged during surgery using ultrasonic diagnostic equipment. This method can display the(More)
Computed virtual chromoendoscopy with flexible spectral imaging color enhancement (FICE) is a new dyeless imaging technique that enhances mucosal and vascular patterns. However, a method for selecting a suitable wavelength for a particular condition has not been established. The aim of this study is to evaluate the color difference method for quality(More)
We developed new software that enables three-dimensional (3D) images of the ureter and urethra to be automatically processed from the video image of a conventional endoscope. The entire image of the ureter or urethra is displayed opened in a picture like a 3D map. The locations of lesions and the 3D structure of the prostatic urethra are depicted using this(More)
Ultrasound imaging is ideally suited for early-stage assessments of liver steatosis and fibrosis, but conventional ultrasound B-mode images do not display quantitative tissue information because conventional ultrasound formation does not incorporate modeling of the complex interactions between ultrasound and liver tissue in normal and diseased states. In(More)
Atsunori Sakama, Satoki Zenbutsu, Masahito Inoue Toshiya Nakaguchi, Norimichi Tsumura, Yoshiyuki Watanabe Daisuke Horibe, Mari Kuboshima, Toshio Tsuyuguchi Yoichi Miyake, Hisahiro Matsubara and Hideki Hayashi 1) Department of Frontier Surgery, Graduate School of Medicine, Chiba University, Chiba 263-8522. 2) Research Center for Frontier Medical Engineering,(More)
Laparoscopic surgery remains a challenging procedure because visualization of the internal target organ cannot be achieved from the laparoscopic image. We have proposed a laparoscopic surgery support method relying on three-dimensional (3D) images reconstructed using a stereo laparoscope and a 3D ultrasound system. The aim of this study is to develop a(More)
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