Wireless Sensor Networks in Healthcare

Wireless Sensor Networks in Healthcare. Potential and Challenges. integrate available specialized medical tech. with wireless networks (ex: wearable accelerometers with integrated wireless cards for patient monitoring)

Share Presentation

Embed Code

Link

Download Presentation

wireless devices
mother wavelet
digital lowpass filter h0
low power consumption
highest priority
zigbee

vahe

vahe + Follow

Download Presentation

Wireless Sensor Networks in Healthcare

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

Presentation Transcript

Wireless Sensor Networks in Healthcare
Potential and Challenges • integrate available specialized medical tech. with wireless networks (ex: wearable accelerometers with integrated wireless cards for patient monitoring) • Benefits: save on medical expenses, time (less face-to-face appointments required), allows more participants in clinical trials
Requirements • Interoperability between biomedical devices required • Event ordering, timestamps, synchronization, quick response in emergencies required • Reliability and robustness for making accurate diagnoses and proper functioning in uncontrolled environments • Integration of many types of sensors demands new node architecture
Requirements (cont.) • Operation in buildings results in further interference due to walls, etc. decreasing reliability • Multi-modal collaboration and energy conservation • Multi-tiered data management • Privacy of records: ownership of information not always clear • Priority override must be carefully designed • Data available during emergencies • Realtime role-based access control
Acceptance of WSNs by patients • Especially important for elderly patients: • Tendency to reject technology • Must be intuitive and easy to operate • A study in which elderly residents of Sydney participated in an open-ended discussion found: • Overall positive view of WSNs due to implications for independence • Ashamed of visible sensors (design as unobtrusive as possible) • Adherence issues due to forgetfulness • Distrust of technology • Privacy
Implementation • Sensors: various types of wearable biomedical sensors with integrated radio transceivers (ex: accelerometer in bracelet to detect hand tremors) • Ad hoc network using Zigbee protocol? • Low power consumption of protocol makes it desirable for this application • Radio signal received by cell phone and transmitted to server • Analysis of raw data performed via wavelet analysis • Decision tree or artificial neural network used to decide appropriate action (data is within normal range, outside normal range and either does or does not require emergency action, etc.) • Data stored in server side database and report is generated to send to healthcare professional
Monitoring and Data Transmission • Monitoring and transmission can occur continuously, periodically or be alert-driven (case-dependent) • Transmit differential data to decrease energy consumption/traffic • Priority-based transmission: path of transmission determined by nature of data, with emergency signals receiving highest priority • Sensors (and potentially other wireless devices in the area) form an ad hoc network • If cell phone fails to transmit data, data can be transmitted over multiple hops in ad hoc network to travel within range
Data Transmission (cont.) • ZigBee could be appropriate specification for networking biomedical devices • Significantly lower wake up time than Bluetooth (15 ms or less vs. 3 s) > low power consumption, long battery life • Inexpensive transceivers • Capable of establishing self-forming, self-healing mesh networks
Motion Detection: Wavelet Analysis • Continuous Wavelet Transform (CWT)- similar to Fourier Transform, but with a variety of probing functions • b translates function across x(t) and a varies time scale • (t), when b=0 and a=1, represents mother wavelet of a family of wavelets • problem with CWT - overly redundant and extremely difficult to recover original signal
Discrete Wavelet Transform • To limit redundancy, DWT restricts variations in translation and scale (often to powers of two) • Recovery tranformation: • Where a=2k, b = l * 2k, and d(k,l) is a sample of W(a,b) at discrete points • Scaling function: • c(n) is a series of scalars defining specific function • Wavelet: • d(n) is a series of scalars related to x(t)
Filter Banks • Most basic filter bank: x(n) is divided into two - ylp(n) and yhp(n), using a digital lowpass filter H0 and highpass filter H1 respectively
Filter Banks (cont.) • Using this method, twice the points of original function must be generated • Compensate by downsampling • Signal smoothed by series of low pass filters • Original signal broken down into frequency bands > useful information about signal can be determined

Related
More by User

Wireless Sensor Networks

Wireless Sensor Networks. Lecture 8 – CS252. Sensor Networks: The Vision. Push connectivity out of the PC and into the real world Billions of sensors and actuators EVERYWHERE . Zero configuration Build everything out of CMOS so that each device costs pennies

967 views • 43 slides

Wireless Sensor Networks

Wireless Sensor Networks. CSC 687 Jerry Yoakum. Outline. Overview Environment Monitoring Medical application Data-dissemination schemes Media access control schemes Distributed algorithms for collaborative processing Architecture for a Wireless Sensor Network Final Remarks. Overview.

874 views • 27 slides

Wireless Sensor Networks

Wireless Sensor Networks. Administrivia. Reading Assignment

637 views • 39 slides

Wireless Sensor Networks

Wireless Sensor Networks. Craig Ulmer. Background: Sensor Networks. Array of Sensor Probes (10-1000) Collect In-Situ Data about Environment Wireless Links Relay Data Collaboration. NASA Applications. Primary In-Situ Data Collection Precision Landing Guidance Vehicle Health Sensors

480 views • 18 slides

Wireless Sensor Networks

825 views • 67 slides

Wireless Sensor Networks

Wireless Sensor Networks. Sensory Wireless Ad hoc. Trend of Computers. Large machines PCs Laptops PDAs What is next?. Ubiquitous Computing. Mark Weiser: The most profound technologies are those that disappear.

499 views • 32 slides

Wireless Sensor Networks

Wireless Sensor Networks. - overview -. Wireless Sensor Networks. Introduction Terminology Applications Technical Challenges Examples Conclusion. Introduction.

808 views • 35 slides

Wireless Sensor Networks

Wireless Sensor Networks. Rob Roosendaal, Lecturer INHolland University. Agenda. Introduction Theoretical Background Practical Information Wrap up and questions. Introduction to Wireless Sensor Networks. Our projects. Alzheimer's disease ADL: Activities in Daily Life

820 views • 49 slides

Wireless Sensor Networks

Wireless Sensor Networks. Mixalis Ombashis ECE-654 Advanced Networks Instructor : Dr. Christos Panayiotou. Outline. Introduction Design Factors Fault Tolerance Scalability Production Cost Hardware Constrains … Protocol Stack Physical Layer Data link Layer …

781 views • 43 slides

Wireless Sensor Networks

Wireless Sensor Networks. Somya Kapoor Jorge Chang Amarnath Kolla. Agenda. Introduction and Architecture of WSN –Somya Kapoor. Security threats on WSN – Jorge Chang & Amarnath Kolla. What is WSN?.

648 views • 30 slides

Wireless Sensor Networks

Wireless Sensor Networks. Link Layer Protocols. Mario Č agalj mario.cagalj@fesb.hr FESB University of Split 20 13. Based on “Protocols and Architectures for Wireless Sensor Networks”, Holger Karl , 2005. Data Link Layer services (source: Wiki).

608 views • 37 slides

Wireless Sensor Networks

Wireless Sensor Networks. MOBICOM 2002 Tutorial (Deborah Estrin, Mani Srivastava, Akbar Sayeed). 2006.11.01 Young Myoung,Kang (INC lab) (ymkang@popeye.snu.ac.kr). Contents. Part I : Introduction Part II : Sensor Node Platforms & Energy Issues

551 views • 30 slides

Wireless Sensor Networks

Wireless Sensor Networks. 巨型机说：“我认为全球大概只需要五台计算机就够了”； PC 机说：“每个家庭的桌面上都应该有一台电脑 ”; Pocket PC 说：“太大了，应该每人口袋里放一台 ”; WSN 说：“每粒沙子都应该是一台计算机”。. Outline. General Comments Wireless Sensor Network Applications Architecture of WSN Overview of Sensor Hardware Characteristic of WSN Our Work. Outline.

823 views • 44 slides

Wireless sensor networks

Sandra Atijas. Wireless sensor networks. Agenda. Introduction Characteristics Network architecture Sensor node structure Network Applications Network Design Challenges Conclusion. Introduction.

533 views • 33 slides

WIRELESS SENSOR NETWORKS

WIRELESS SENSOR NETWORKS. `. T opics. Introduction What are WSNs? An example: ESB WSN applications Energy conservation Ad-hoc routing Basic principles Overview of routing protocols Data-centric protocols Rumor Routing Geogra phical protocols. Localization and Positioning

1.54k views • 105 slides

Wireless Sensor Networks

Wireless Sensor Networks. A ν. Καθηγητής Συμεών Παπαβασιλείου Εθνικό Μετσόβιο Πολυτεχνείο Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών papavass@mail.ntua.gr Τηλ: 210 772-2550. Data gathering in WSN. Issues to consider. Delay :

494 views • 38 slides

WIRELESS SENSOR NETWORKS

WIRELESS SENSOR NETWORKS. By: Reza Abrishambaf. Wireless Sensor Networks. Overview

458 views • 29 slides

Wireless Sensor Networks

Wireless Sensor Networks. Presenter: Carlos Pomalaza-Ráez carlos@ee.oulu.fi International Workshop on Wireless Ad Hoc Networks May 31 – June 3, 2004 University of Oulu, Finland http://www.ee.oulu.fi/~carlos/IWWAN_04_WSN_Tutorial.ppt. Outline. Introduction

1.62k views • 125 slides

Wireless Sensor Networks

Wireless Sensor Networks. Outline. Introduction Sensor Node Platforms & Energy Issues Time & Space Problems in Sensor Networks Sensor Network Protocols. Part I: Introduction. Outline. Introduction Motivating applications Enabling technologies Unique constraints

1.08k views • 77 slides

Wireless Sensor Networks

Wireless Sensor Networks. Link Layer Protocols. Mario Č agalj mario.cagalj@fesb.hr FESB University of Split 23 / 4 /20 10. Based on “Protocols and Architectures for Wireless Sensor Networks”, Holger Karl , 2005. Data Link Layer services (source: Wiki).

460 views • 37 slides