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

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CONCLUSION

15

REFERENCES