Portable Thyroid Monitor (PTM) is an in-vivo thyroid monitoring system for the monitoring of internal radioactive contamination due to ¹³¹I in radiation workers as well as in the members of public (MOP). This system is developed in response to the need of the DAE facilities for rapid and efficient thyroid monitoring during normal and emergency situations. ¹³¹I is an important fission product in Nuclear Power Plant (NPP) and is highly volatile in nature, which may lead to thyroid uptake.

The developed system has features like easy to transport & install, simple to operate, provides detector collimation, chin rest to minimize positional errors, indicator for thyroid position etc. The additional feature of PTM is that its adjustable height for measurement of ¹³¹I thyroidal content in subjects of varying sitting height.

Major components of PTM are 51 mm dia. x 51mm thick NaI(Tl) detector, Multi-Channel Analyzer (MCA) and associated electronics, shielded collimator, detector mounting & movement system, data acquisition system and thyroid monitoring software (Ver.1.0). The thyroid monitoring software perform estimation of thyroid content, intake and CED as per ICRP-78.

1. Portable table top system for laboratory and on-field use.
2. 51mm dia. x 51mm thick NaI(Tl)scintillation detector.
3. Shielded collimator with provision for chin rest.
4. LED based indicator for thyroid positioning.
5. Scale to measure detector to thyroid distance for realistic efficiency application.
6. Compact system.
7. System height adjustment facilitates measurement of various age groups of individuals.
8. Easy to assemble and dismantle.
9. Software for estimation of thyroid content, intake and CED as per ICRP-78.
10. 2D bar code reader to extract subject’s information from photo identity card e.g., Aadhaar card.

1. Shield
   1. Total weigh ~25kg
   2. Detector shield collimator made of stainless steel and lead.
   3. Floor area required for the system is 60 cm x 60 cm.
2. Detector & MCA
   1. 51 mm diameter x 51 mm thick NaI(Tl) detector.
   2. 1K GSPEC MCA (Make: M/s Electronic Enterprises India Pvt. Ltd).
   3. Windows 10 based Thyroid monitoring software (Ver 1.0)
3. Efficiency calibration of PTM
   1. Efficiency calibration to be done using IAEA/ANSI thyroid neck phantom.
   2. Health of the system to be checked routinely using disk sources of ¹³⁷Cs or ¹³³Ba (~1kBq).
4. Detection Limit:
   1. Typical MDA of the system: 100Bq (Actual system performance will vary with ambient environmental background radiation).

Portable Thyroid Monitor (PTM) is an in-vivo thyroid monitoring system for the monitoring of internal radioactive contamination due to ¹³¹Iin radiation workers as well as in the members of public (MOP). This system is developed in response to the need of the DAE facilities for rapid and efficient thyroid monitoring during normal and emergency situations. ¹³¹I is an important fission product in Nuclear Power Plant (NPP) and is highly volatile in nature, which may lead to thyroid uptake.

The developed system has features like easy to transport & install, simple to operate, provides detector collimation, chin rest to minimize positional errors, indicator for thyroid position etc. The additional feature of PTM is that its adjustable height for measurement of ¹³¹I thyroidal content in subjects of varying sitting height.

Major components of PTM are 51 mm dia. x 51mm thick NaI(Tl) detector, Multi-Channel Analyzer (MCA) and associated electronics, shielded collimator, detector mounting & movement system, data acquisition system and thyroid monitoring software (Ver.1.0). The thyroid monitoring software perform estimation of thyroid content, intake and CED as per ICRP-78.

1. Portable table top system for laboratory and on-field use.
2. 51mm dia. x 51mm thick NaI(Tl)scintillation detector.
3. Shielded collimator with provision for chin rest.
4. LED based indicator for thyroid positioning.
5. Scale to measure detector to thyroid distance for realistic efficiency application.
6. Compact system.
7. System height adjustment facilitates measurement of various age groups individuals.
8. Easy to assemble and dismantle.
9. Software for estimation of thyroid content, intake and CED as per ICRP-78.
10. 2D bar code reader to extract subject’s information from photo identity card e.g., Aadhaar card.

1. Shield
   1. Total weigh ~25kg
   2. Detector shield collimator made of stainless steel and lead.
   3. Floor area required for the system is 60 cm x 60 cm.
2. Detector & MCA
   1. 51 mm diameter x 51 mm thick NaI(Tl) detector.
   2. 1K GSPEC MCA (Make: M/s Electronic Enterprises India Pvt. Ltd).
   3. Windows 10 based Thyroid monitoring software (Ver 1.0)
3. Efficiency calibration of PTM
   1. Efficiency calibration to be done using IAEA/ANSI thyroid phantom.
   2. Health of the system to be checked daily using disk sources of ¹³⁷Cs or ¹³³Ba (~1kBq).
4. Detection Limit :
   1. Typical MDA of the system: 100Bq (Actual system performance will vary with ambient environmental background radiation).

1. Measurement of internal radioactive contamination due to ¹³¹I in human thyroid during normal as well as in emergency situations.
2. Useful for nuclear facilities involved in handling of radioiodine. These facilities are nuclear power plants, research reactors, research laboratories, nuclear medicine facilities, isotope production facilities and defense.

INFRASTRUCTURAL REQUIREMENT

Space

1. Mechanical fabrication facility and workshop with trained manpower for handling of Stainless-Steel structure and lead. It requires ~ 10 square meter working space.

MAN POWER

1. Team for mechanical fabrication and Electronics / Computer / Instrumentation Engineer, for hardware and software assembly & testing of the instrument.

POWER SUPPLY

1. Adequate power supply for mechanical workshop.

Test Equipments

1. Standard Test & measuring facility for electronic systems like Oscilloscope, multimeter, soldering machine etc.