Naohiko Sugita

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PURPOSE To develop a prototype robotic system designed to assist vitreoretinal surgery and to evaluate its accuracy and maneuverability. DESIGN Experimental study. PARTICIPANTS This study used harvested porcine eyes. METHODS After development of a prototype robotic system, pointing accuracy tests of the system were performed on graph paper and in(More)
A new method for fluoroscopic tracking of a proximal bone fragment in femoral fracture reduction is presented. The proposed method combines 2-D and 3-D image registration from single-view fluoroscopy with tracking of the head center position of the proximal femoral fragment to improve the accuracy of fluoroscopic registration without the need for repeated(More)
BACKGROUND Microcannulation, a surgical procedure for the eye that requires drug injection into a 60-90 µm retinal vein, is difficult to perform manually. Robotic assistance has been proposed; however, its effectiveness in comparison to manual operation has not been quantified. METHODS An eye model has been developed to quantify the performance of manual(More)
Toolpath generation and optimization is considered as a challenging problem in the minimally invasive orthopedic surgery with a milling robot. The objective of this paper is to minimize the collision of the cutting tool with the soft tissues. A novel approach of toolpath generation and optimization is proposed. A redundant axis is implemented to avoid the(More)
OBJECTIVES Most methods currently used to assess surgical skill are rather subjective or not adequate for microneurosurgery. Objective and quantitative microneurosurgical skill assessment systems that are capable of accurate measurements are necessary for the further development of microneurosurgery. METHODS Infrared optical motion tracking markers, an(More)
PURPOSE Pediatric endoscopic surgery requires special surgical skills because of the small working space and tissue fragility. This article presents a video-based skill assessment method for endoscopic suturing using a pediatric chest model. MATERIALS AND METHODS A commercial suture pad was placed in a rapid-prototyped pediatric chest model of a(More)
In this paper, we present the development of an intuitive user interface for hand-held multi-DOF forceps for laparoscopic surgery. Interface design is crucial to the development of hand-held medical instruments. Surgeons may not use medical devices owing to their poor usability, regardless of their performance. In addition, most surgeons do not have the(More)
INTRODUCTION The objective of our research was to design and develop a novel needle driver with multiple degrees of freedom (DOFs) for pediatric laparoscopic surgery. Pediatric laparoscopic surgery has many advantages for patients, but the difficulty of the operation is increased due to many restrictions. For example, the motion of the needle driver is(More)
INTRODUCTION Though minimally invasive pediatric surgery has become more widespread, pediatric-specific surgical skills have not been quantitatively assessed. MATERIAL AND METHODS As a first step toward the quantification of pediatric-specific surgical skills, a pediatric chest model comprising a three-dimensional rapid-prototyped pediatric ribcage with(More)
AIMS The aims of this study were to develop a thin needle driver with multiple degrees of freedom and to evaluate its efficacy in multidirectional suturing compared with a conventional needle driver. MATERIALS AND METHODS The tip (15 mm) of the novel user-friendly needle driver (3.5 mm in diameter) has three degrees of freedom for grasping, rotation, and(More)