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Related Concept Videos

Radiation: Applications01:17

Radiation: Applications

The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...

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PET and MRI Guided Irradiation of a Glioblastoma Rat Model Using a Micro-irradiator
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Microsystems technology in radiation therapy.

T Maleki1, B Ziaie

  • 1School of Electrical and Computer Engineering at Purdue University, West Lafayette, IN 47907, USA.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|November 25, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces novel implantable micro-devices to enhance radiation therapy. These include a wireless dosimeter for dose monitoring and a tracking system for real-time tumor localization, improving treatment precision.

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Area of Science:

  • Biomedical Engineering
  • Medical Physics
  • Oncology

Background:

  • Radiation therapy efficacy can be limited by inaccurate dose delivery and real-time tumor localization.
  • Implantable sensors offer potential for precise monitoring of radiation dose and tumor dynamics during treatment.

Purpose of the Study:

  • To develop and present implantable micro-devices aimed at enhancing radiation therapy effectiveness.
  • To introduce a trackable radiation sensor integrating a dosimeter and an electromagnetic tracking system.
  • To present a novel capacitive pressure sensor with a Guyton chamber for accurate interstitial pressure measurement.

Main Methods:

  • Development of a self-biased solid-state dosimeter for wireless dose monitoring.
  • Integration of an electromagnetic tracking system for real-time tumor positioning.
  • Design of a capacitive pressure sensor incorporating a Guyton chamber to mitigate sensor drift.

Main Results:

  • The dosimeter exhibits a sensitivity of 9 kΩ/Gy and a dynamic range of 10 Gy.
  • The tracking system achieves 2 mm resolution and a 5 cm dynamic range, tracking targets up to 60 cm away.
  • The pressure sensor demonstrates a sensitivity of 75 fF/kPa and a dynamic range of 60 mmHg.

Conclusions:

  • The presented micro-devices offer advanced capabilities for real-time monitoring and precise targeting in radiation therapy.
  • The integrated trackable radiation sensor and the drift-resistant pressure sensor represent significant advancements in implantable medical devices.
  • These technologies have the potential to improve radiation therapy outcomes by enabling more accurate and personalized treatments.