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Nakaguchi Lab
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A biomedical engineering lab that supports diagnosis and treatment through image processing.
AboutAbout the lab
Supporting medical practice through images.
The Nakaguchi Lab uses computer image processing to research diagnostic support, treatment support, and biometric measurement.
For endoscopic surgery, the lab has proposed a system that projects images onto the patient's body surface, as well as a "camera-equipped trocar" with a miniature camera built into the trocar.
The lab also develops a training system in which a virtual stethoscope is placed on a simulated patient to play back heart and breath sounds, and a device that quantitatively records the color, shape, and moisture level of the tongue.
The lab accepts lab visits and research consultations at any time, and invites third-year students in the Biomedical Engineering Course as well as students from other universities who wish to enter graduate school here.
Key terms
- Trocar
- A tube-shaped tool inserted through the body surface in endoscopic surgery to pass instruments into the body
- Augmented reality
- A technology that overlays computer-generated images and information onto the real scene in front of you
- Mosaicing
- Stitching together images from multiple cameras into a single wide image
NewsLab news
A paper first-authored by a master's student was accepted by the journal Diagnostics
A master's student received the Excellence Award (Academic Encouragement Award) at the Annual Meeting of the Japanese Society of Virtual Reality Medicine
A paper first-authored by a doctoral student was accepted by the journal Applied Sciences
An undergraduate student received the Dean of Engineering Award at the Biomedical Engineering Course graduation ceremony
A master's student received the Presentation Encouragement Award for Medical Students at the Kanto-Koshinetsu Regional Meeting of the Japanese Association for Thoracic Surgery
ResearchResearch themes
The lab researches how computer image processing can be applied to diagnostic support, treatment support, and biometric measurement. Its work is organized around four pillars: treatment support, medical training systems, measurement and analysis of tongue images, and image-based diagnostic support.
*Illustrative imageMedical support with projection-based augmented reality
Endoscopic surgery requires long periods of working while watching a monitor, which places a heavy burden on the surgeon. The lab proposes a system that uses a projector to display images on the patient's body surface, so that the surgeon can operate while looking at the patient, the actual target of the procedure.
*Illustrative imageDevelopment of a camera-equipped trocar
In endoscopic surgery, the lack of visual information is a serious problem. The lab proposes a new medical camera with a miniature camera built into the trocar used in surgery, and is advancing its development toward practical use so that surgeons can operate while viewing the inside of the body cavity from multiple directions.
*Illustrative imageWidening the field of view with multi-camera mosaicing
With the camera-equipped trocar producing multiple camera images, there is a need for ways to present them efficiently to the surgeon. The lab proposes a robust and fast image processing method that combines tracking of each individual camera with mosaicing across multiple cameras.
*Illustrative image3D shape reconstruction inside the abdominal cavity
Computer navigation for endoscopic surgery requires three-dimensional information on the surfaces of organs and tissues inside the abdominal cavity. The lab proposes a method that combines multi-viewpoint images from the camera-equipped trocar with SLAM technology to perform 3D reconstruction in real time.
MembersFaculty
The members of the Nakaguchi Lab include faculty, administrative assistants, collaborating researchers, research fellows, doctoral, master's, and undergraduate students, and researchers.As of 2026
- ProfessorToshiya Nakaguchi
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Virtual Fixtures (Medical Concept 1991) XR2020” Augmented2021 / CC BY-SA 4.0 (cropped)
- Medical support with projection-based augmented reality: “Augmented Reality Sandbox at Perot Museum” Henrysz / CC BY-SA 4.0 (cropped)
- Development of a camera-equipped trocar: “Laparoscopic Hand Instruments 001 JPN” ignis / CC BY-SA 3.0 (cropped)
- Widening the field of view with multi-camera mosaicing: “Cyprus-Image stitching-Omodos” Eric Bézine / CC BY-SA 3.0 (cropped)
- 3D shape reconstruction inside the abdominal cavity: “3D Scanning the Car Door” Kelly No.715 / CC BY-SA 4.0 (cropped)
- Related lab (Micro-CT and Medical Imaging Engineering Lab): “X-ray Computed Tomography of Astromaterials -- jsc2024e076997” NASA Johnson Space Center / ROBERT MARKOWITZ NASA-JSC / Public domain (cropped)
- Related lab (Biomedical Imaging Lab (Suga Lab)): “An MRI scanner” Walter Davies / CC BY-SA 4.0 (cropped)
- Related lab (Yamaguchi Lab): “Doppler Ultrasound and Vascular Sonography Examination in Navi Mumbai, Maharashtra, India” Goleisureintl / CC BY 4.0 (cropped)
- Related lab (Yoshida Lab): “A modern medical ultrasound scanner” Harrison Keely / CC BY 4.0 (cropped)
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