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Related Concept Videos

Imaging Studies II: Positron Emission Tomography and Scintigraphy01:25

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Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
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Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body...
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Updated: Jun 28, 2025

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Developing Low Molecular Weight PET and SPECT Imaging Agents.

Lian Xue1, Caitlin V M L Jie2, Sandrine Desrayaud3

  • 1Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade Parkville, Victoria 3052, Australia.

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Summary
This summary is machine-generated.

Developing new imaging agents for PET and SPECT involves a structured process from initial need to clinical application. This includes lead optimization and preclinical/clinical studies for effective medical imaging and drug development.

Keywords:
BiomarkersClinical translationImagingPositron Emission TomographyTarget engagement

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Area of Science:

  • Nuclear medicine
  • Radiopharmaceutical chemistry
  • Medical imaging

Background:

  • Positron emission tomography (PET) and single-photon emission computerized tomography (SPECT) are crucial diagnostic tools.
  • Imaging agents are essential for answering clinical questions in drug development and patient care.
  • The development of these agents follows a defined, albeit adaptable, process.

Purpose of the Study:

  • To outline the comprehensive development pathway for novel imaging agents.
  • To detail the stages from initial concept to clinical usability.
  • To highlight the unique requirements compared to therapeutic agent development.

Main Methods:

  • Defining project rationale and imaging needs.
  • Designing and optimizing early-stage lead compounds.
  • Assessing imaging potential through preclinical and clinical evaluations.
  • Radiolabeling with positron emitters for PET applications.
  • Conducting first-in-human studies to validate agent performance.

Main Results:

  • A systematic approach ensures the creation of clinically relevant imaging agents.
  • Early assessment of imaging potential guides development efficiency.
  • Preclinical and clinical studies are tailored to evaluate diagnostic capabilities.
  • First-in-human studies provide rapid feedback on agent efficacy.

Conclusions:

  • The development of imaging agents is a rigorous, multi-stage process.
  • Successful agents are those that effectively address specific clinical questions.
  • This pathway facilitates the translation of novel agents into clinical practice for improved diagnostics.