Date post: | 18-Dec-2014 |
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Engineering |
Upload: | ciju-varghese |
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EARLY STROKE IDENTIFICATION USING MICRO WAVE
HELMET
BY, GUIDED BY,
CIJU VARGHESE ANJALI. R
S7 EC B ASST. PROF.
R.NO 10 EC DEPT.
1
INTRODUCTION
Stroke is the No.3 cause of death. (#1 – Heart Disease, #2 – Cancer)
5 million people/year die and another 5 million are permanently disabled.
Every 3.1 minutes someone dies of a stroke.
Time is a crucial factor.
For neurologists “time is brain”.
Limitations of current diagnosis.
2
WHAT IS STROKE ?????
Brain tissues are damaged from a sudden loss of blood flow, resulting in a loss of neurological function
Types: Ischemic stroke (85%) is blood flow is
blocked to the brain.Hemorrhagic Stroke (15%) is bleeding
occurs from vessels within the brain.
3
CURE FOR STROKE
tPA (Tissue Plasminogen Activator)
is a clot-busting drug
It dissolves blood clots obstructing blood flow to the brain.
Medical Surgery
4
WHY MICROWAVE DIAGNOSIS?
Microwave property of non-ionising radiations.
Zero side effects to body.
Relatively cheap,compact,portable technology.
Vast research and development in Microwave Tomography(MWT).
Exploits dielectric variations in brain.5
DIELECTRICS IN HUMAN BRAIN
6
STROKE FINDER HELMET
Consists of:
A helmet-like antenna system which is placed on the patient’s head.
A microwave unit plus a computer for equipment control, data collection.
Signal Processing.
7
ANTENNA SYSTEM
10 triangular patch antennas.
Power input is 1mW.
Frequency Range 0.3-3.0GHz
A liquid(water) bag is placed between antenna and skull.
8
WORKING OF ANTENNA SYSTEM
9
SIGNAL PROCESSING
Data from each channel is pre-processed.
The total output signal power is made equal.
Data is transformed by an algorithm.
Full reconstruction of dielectric parameters algorithm is used.
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RECONSTRUCTED IMAGE
PERFORMANCE ASSESSMENT
Specificity v/s Sensitivity is plotted.
Area under curve(AUC) should be between 0.5 and 1.
Better performance to detect ICH v/s healthy(AUC=0.88).
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13
FUTURE SCOPES
14
CONCLUSION
15
REFERENCES