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Related Concept Videos

Ultrasonography01:17

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called a...
Ultrasound I: Abdominal Ultrasonography01:20

Ultrasound I: Abdominal Ultrasonography

Introduction:
Abdominal ultrasonography, commonly known as abdominal ultrasound, is a vital, non-invasive medical imaging technique widely used in healthcare.
Procedure:
This diagnostic tool allows the clinician to visually inspect internal structures within the abdomen, including vital organs such as the liver, gallbladder, pancreas, kidneys, and spleen.
The abdominal ultrasound process begins with applying a special gel to the patient's skin over the abdomen. This gel enhances the...

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Related Experiment Video

Updated: Jun 6, 2026

Wideband Optical Detector of Ultrasound for Medical Imaging Applications
08:21

Wideband Optical Detector of Ultrasound for Medical Imaging Applications

Published on: May 11, 2014

Ultrasound user-identification for wireless sensor networks.

Bilal Shahid1, Anushiya A Kannan, Nigel H Lovell

  • 1Graduate School of Biomedical Engineering, University of New South Wales, Sydney, 2052, Australia.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 25, 2010
PubMed
Summary

This study introduces an ultrasound (US) localization system for precise indoor tracking, outperforming radio frequency (RF) methods. The novel system achieves sub-room-level accuracy for enhanced elderly care monitoring.

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Area of Science:

  • Biomedical Engineering
  • Sensor Technology
  • Indoor Positioning Systems

Background:

  • Radio frequency (RF) localization struggles indoors due to multipath scatter and wall penetration, causing inaccurate room-level associations.
  • Accurate indoor localization is critical for clinical applications, especially for monitoring elderly patients and caregivers in shared spaces.
  • Existing asset tracking systems often lack the necessary precision for critical healthcare inferences.

Purpose of the Study:

  • To propose and demonstrate a proof of concept for an ultrasound (US)-based indoor localization system.
  • To achieve sub-room-level accuracy for enhanced indoor tracking applications.
  • To overcome limitations of RF-based systems in indoor environments for healthcare monitoring.

Main Methods:

  • Utilizes an ultrasound (US) based technique with strategically placed transmitter beacons.
  • Employs a receiver module worn by the subject for mobility.
  • Alleviates transmission collisions using unique prime transmission intervals for independent beacon operation, eliminating synchronization needs.

Main Results:

  • Demonstrates accurate detection at ranges exceeding 5m (0° angle) and approximately 3.5m (30° angle).
  • Successfully received signals from two collocated transmitters separated by 2.5m, even in overlapping regions.
  • Achieved sub-room-level accuracy, surpassing typical RF localization performance.

Conclusions:

  • The proposed US-based system offers a viable solution for high-accuracy indoor localization.
  • This technology has significant potential for improving elderly care monitoring and asset tracking in healthcare settings.
  • The unique transmission interval method ensures robust and independent beacon operation.