Tokyo Institute of Technology

Nipro Corporation

Tokyo Medical and Dental University

Clinical Engineering Laboratory Limited

Medirand, Inc.

Sumitomo Electric Industries, Limited

Yukio Kosugi

Toshimitsu Musha

Tatsuhiko Saitoh

Yuri Watanabe

Jun Ikebe

Kintomo Takakura

Eiju Watanabe

Yoriaki Kumagai

Takashi Asada

Yohei Kobayashi

Naofumi Tanaka

Kazuyuki Kojima

Shinya Manaka

Toru Omata

Toshio Takayama

Hamed Akbari

Masako Tanaka

It is intended to quantitatively evaluate deterioration in brain function associated with a disease such as dementia, with a high degree of accuracy by a simplified method using signals acquired from a few sensors arranged on the scalp. The present invention relates to a brain activity measurement device comprising: a signal acquisition part configured to acquire a signal from a brain of the subject, using three sensors attached to different locations on the surface of the head of a subject; a data extraction part configured to extract, from each of the three signals acquired from respective ones of the sensors, a deep-brain potential signal having a specific frequency band arising from an activity of a deep brain region, and acquire data from the extracted deep-brain potential signal with a sampling period; a correlation value calculation part configured to calculate a correlation value indicative of a correlative relationship among the deep-brain potential signals acquired from each respective sensors, based on a phase relationship among three pieces of time-series data each extracted from the respective sensors by the data extraction part; and an index value calculation part configured to analyze the deep-brain potential signals from the deep brain region, based on the calculated correlation value, to calculate an index value for determining a brain function.

Brain activity measurement device, program, and method

The object is to seek a position for an insertion opening through which a treatment tool inserted inside a body cavity may reach an affected area while avoiding an obstacle. A first light emitting portion placed in an insertion portion applies light to an affected area inside a body cavity. A second light emitting portion placed in the insertion portion applies light to an inner wall of the body cavity toward the opposite side of the first light emitting portion. At this time, a light pathway on which the light from the first light emitting portion and the second light emitting portion will not strike the obstacle (e.g., an organ outside than the affected area, etc.) inside the body cavity is searched for. By making, in the position that the light from the second light emitting portion strikes, an insertion opening for inserting a treatment tool, the treatment tool can reach the affected area without interfering with the obstacle.

Indication device

An articulated arm has a plurality of arms connected to each other by joints. A pointer is connected to one of the plurality of arms. The arm nearest the pointer is the foremost arm of the articulated arm. Angular displacement sensors are provided at joints of the articulated arm, for producing angular signals. Tomographical images of a patient's body are displayed on a cathode-ray tube. The angular signals are converted to tomographical position signals corresponding to the tomographical images on the cathode-ray tube. In response to the tomographical position signals, the position of the tip of the pointer is displayed on the cathode-ray tube with a mark. The system can be used, for example, in locating a position on a patient's body where an operation is to be performed.

System for indicating a position to be operated in a patient's body

System for generating electrical pulses for relieving the pain of the patient comprising a pulse generator and a controller for modulating the parameters of the output pulses of the pulse generator to fluctuate in accordance with the 1/f rule; i.e. the spectral density of the fluctuation varies inversely with the frequency.

Method and randomized electrical stimulation system for pain relief

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Tokyo, Japan

Yukio Kosugi