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This study introduces beta-minus (β(-)) radio-tracers for radio-guided surgery (RGS), overcoming background noise limitations. This novel approach enhances RGS sensitivity and applicability to various tumors.

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Area of Science:

  • Medical Physics
  • Nuclear Medicine
  • Surgical Oncology

Background:

  • High radiation penetration of current radio-guided surgery (RGS) limits its effectiveness due to background noise.
  • Existing RGS methods using beta-plus (β(+)) emitters face challenges with background interference.
  • Beta-minus (β(-)) emitters offer a potential solution due to their lower penetration power.

Purpose of the Study:

  • To propose and evaluate the use of beta-minus (β(-)) emitting radio-tracers and probes for radio-guided surgery (RGS).
  • To demonstrate the advantages of β(-) emitters over β(+) emitters in reducing background noise.
  • To extend the application of RGS to tumors where background signals from healthy tissue are problematic.

Main Methods:

  • Development and performance study of a prototype beta-minus (β(-)) probe using phantom experiments.
  • Detailed simulations to extrapolate phantom results to a realistic clinical scenario (meningioma).
  • Comparison of administered activity with Positron Emission Tomography (PET) scans.

Main Results:

  • The developed β(-) probe prototype demonstrated good sensitivity, detecting residuals as small as 0.1 ml within 1 second.
  • Simulations indicate effective performance in a realistic meningioma case.
  • Required administered activity is lower than that for PET scans, ensuring negligible radiation exposure.

Conclusions:

  • Beta-minus (β(-)) emitting radio-tracers and probes offer a promising advancement for radio-guided surgery (RGS).
  • This method significantly reduces background noise, enhancing probe versatility and applicability.
  • The approach allows for sensitive tumor detection with minimal radiation exposure to medical personnel.