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Related Experiment Video

Updated: May 31, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

Dual-isotope PET using positron-gamma emitters.

A Andreyev¹, A Celler

¹Department of Radiology, University of British Columbia, Vancouver, British Columbia, Canada. andreyev@interchange.ubc.ca

Physics in Medicine and Biology

|July 5, 2011

Summary

This study introduces a novel dual-isotope positron emission tomography (PET) method. It enables simultaneous imaging of two biological processes by distinguishing isotopes using prompt gamma detection, achieving accurate activity recovery.

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Published on: November 20, 2018

Area of Science:

Medical Imaging
Nuclear Medicine
Physics

Background:

Positron emission tomography (PET) is a crucial functional imaging technique.
Standard PET faces limitations in dual-isotope imaging due to indistinguishable annihilation photons.
Existing dual-isotope methods rely on isotope half-lives, often requiring complex kinetic assumptions.

Purpose of the Study:

To propose and evaluate a novel approach for dual-isotope PET imaging.
To overcome the limitations of standard PET in simultaneously visualizing two biological processes.
To enable more comprehensive molecular imaging studies.

Main Methods:

Developed a novel dual-isotope PET method utilizing a pure positron emitter and a positron-gamma emitting isotope.
Employed GATE simulations to assess the proposed method's performance.
Utilized coincident prompt gamma detection to tag annihilation events from the positron-gamma emitter.
Reconstructed images from a tagged dataset as a prior for the primary dataset.

Main Results:

The novel method successfully separated activity distributions of two different radiotracers ((18)F/(22)Na and (18)F/(60)Cu).
Accurate recovery of total activities was achieved, with relative errors around 5%.
Demonstrated the feasibility of distinguishing between simultaneously administered positron-emitting isotopes.

Conclusions:

The proposed dual-isotope PET technique offers a viable solution for simultaneous multi-tracer imaging.
This method enhances the capabilities of PET by enabling the study of two biological processes concurrently.
The approach shows promise for advancing molecular imaging applications in research and diagnostics.