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Fluorescence Fiber Optic Temperature On-line Monitoring Scheme For Medical Industry

Technical Background

The temperature treatment methods in medical industry are microwave therapy, microwave hyperthermia, radiofrequency hyperthermia, and magnetic resonance imaging. In microwave hyperthermia, the main factor affecting the accuracy of temperature measurement results is the interference of microwave or radio frequency. The metal made temperature sensor probe will produce inductive current in microwave field, which makes the measurement results cannot reflect the real temperature of tumor tissues. Whether hyperthermia is effective, the key question is to heat the tumor above the effective treatment temperature. If the tumor temperature is below the treatment temperature, not only has no treatment effect, but also may promote the spread of the tumor, if the temperature is too high, may damage the normal tissue, in about 42℃,1℃ difference can cause multiple changes of cell survival rate. Clinical temperature measurement accuracy within 37℃ ~ 46℃ should be within ±0.2℃, so accurate temperature measurement is the key technology in microwave hyperthermia.

Comparison of Temperature Measurement Methods

Index

Fluorescence Fiber Optic Temperature Sensor

Conventional Temperature Sensor

Thermistor- High Resistance Wire Temperature Sensor

Operating environment

High voltage under strong electromagnetic field

Materials

No metal parts, using fiber optic sensor probe

Metal made temperature probe and wire

Employ semiconductor thermistors as probes, high resistance wire as signal transmission line, and equipped with a simple measurement circuit

Advantages and disadvantages

1.Anti-electromagnetic interference, high voltage resistance, corrosion resistance

2.Reliable and stable, high precision, anti-explosion and flame-proof

3. Tiny size and light weight

4. Non-toxic

1. Under high frequency electromagnetic field, the temperature probe and wire will produce induced current, which increases theirs’ temperature and interferes with temperature.

2. Big error makes it impossible to measure stable temperature.

3.Also bring great harm to microwave equipment

1. Poor stability, interchangeability and linearity

2.Poor mechanical strength of high resistance wire, difficult to achieve high accuracy measurement

Under the special environment of microwave, radio frequency and high frequency, the fluorescence fiber temperature measurement system can measure the online temperature in real time, which exactly reflects the real temperature of the measured position, and is the optimal temperature measurement method.

HQ-16/18 Fluorescence Fiber Optic Temperature Monitoring System

Product Description

Name	Performance	Picture
One channel temperature measuring system- rectum treatment	Reading temperature range: 0-80℃Resolution:0.1℃ Temperature accuracy: ±0.3℃ Sensing cable length:< 10m Sensing cable diameter:2.3mm Input power: DC24V Communication port：485/RS-232Modbus (protocol / RdLight Logger software) Analog output:4-20mA or 0-5V Power consumption:1W
One channel temperature measuring system-Tumor hyperthermia and microwave therapy	Reading temperature range: 30-50℃Resolution:0.1℃ Temperature accuracy: ±0.3℃ Sensing cable length:< 10m Sensing cable diameter:0.45mm Input power: DC24V Communication port：485/RS-232Modbus (protocol / RdLight Logger software) Analog output:4-20mA or 0-5V Power consumption:1W
Six channels temperature measuring system	Reading temperature range: 30-50℃Resolution:0.1℃ Temperature accuracy: ±0.3℃ Sensing cable length:< 10m Sensing cable diameter:0.45mm Input power: 220V Communication port：485/RS-232Modbus (protocol / RdLight Logger software) Analog output:4-20mA or 0-5V Power consumption:1W

Software Introduction

The supporting software of fluorescence fiber optic temperature measurement products have the functions of reading, storage, drawing and data export, which are convenient for real-time observation and data post-processing.