Mitsuru Ikeda

Learn More
Our objective was to evaluate the ability of multiplanar reformatted (MPR) images combined with 0.5-mm axial images to depict the pancreatic and intrapancreatic bile ducts and compare the results with those of 0.5-mm axial, 2-mm axial, and 6-mm axial images alone. Seventy-seven patients without obstruction of the main pancreatic ducts (MPD) underwent(More)
We evaluated the newly developed whole-brain, isotropic, 3-dimensional turbo spin-echo imaging with variable flip angle echo train (SPACE) for contrast-enhanced T(1)-weighted imaging in detecting brain metastases at 3 tesla (T). Twenty-two patients with suspected brain metastases underwent postcontrast study with SPACE, magnetization-prepared rapid(More)
The main objectives of this paper include to propose a new research field called "Ontology Engineering" and to show it can be a basic research of content-oriented research and provides such technologies that are badly needed. We begin the paper by discussing what an ontology is. We next analyze the depth of the ontology use in eight levels followed by the(More)
Although a lot of researchers have pointed out the signi cance of functional representation, the general relations between function and behavior is not fully understood yet. We consider the knowledge of each component in a system as consisting of two elements. One is a necessary and su cient information for simulation of the component which we call(More)
We have developed an environment for building/using ontologies, named Hozo, based on both of a fundamental consideration of an ontological theory and a methodology of building an ontology. Since Hozo is based on an ontological theory of a role-concept, it can distinguish concepts dependent on particular contexts from so-called basic concepts and contribute(More)
The aim of this study was to examine abnormalities of the central nervous system in patients with chronic pain who were diagnosed with complex regional pain syndrome (CRPS). Brain activity was assessed using 18F-fluorodeoxyglucose positron emission tomography. The data collected from 18 patients were compared with data obtained from 13 normal age-matched(More)
The aim of our research includes constructing a guideline to help users select a form of learning appropriate for learning goals and learning tasks. To fulfill the aim we propose Learner’s Growth Model (GM) and two types of augmented GM: Form-augmented GM and Task-augmented GM. In this paper we describe these three types of models and a mechanism to(More)
We have investigated the property of problem solving knowledge and tried to design its ontology, that is, Task ontology. The main purpose of this paper is to illustrate a Conceptual LEvel Programming Environment (named CLEPE) as an implemented system based on Task ontology. CLEPE provides three major advantages as follows. (A) It provides human-friendly(More)
PURPOSE To evaluate the capabilities of multisection computed tomography (CT) in determining the likelihood of invasiveness of intraductal papillary mucinous neoplasm (IPMN). MATERIALS AND METHODS The institutional review board approved this research and waived informed consent from the patients. Two radiologists blinded to the pathologic assessment of(More)