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Related Concept Videos

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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.
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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.
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Updated: May 5, 2026

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Molecular imaging agents for SPECT (and SPECT/CT).

Gopinath Gnanasegaran1, James R Ballinger

  • 1Department of Nuclear Medicine, Guy's and St Thomas' NHS Foundation Trust, Great Maze Pond, London, SE1 9RT, UK.

European Journal of Nuclear Medicine and Molecular Imaging
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Hybrid single photon emission computed tomography/computed tomography (SPECT/CT) enhances diagnostic accuracy for existing radiopharmaceuticals. SPECT/CT is crucial for evaluating new tracers and improving lesion localization in various medical imaging applications.

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Area of Science:

  • Medical Imaging
  • Nuclear Medicine
  • Radiopharmacology

Background:

  • Hybrid SPECT/CT cameras improve diagnostic value of radiopharmaceuticals.
  • Precise anatomical localization enhances diagnostic confidence in bone, infection, and sentinel lymph node imaging.
  • Accurate localization is critical for surgical planning, especially for parathyroid and sentinel lymph node procedures.

Purpose of the Study:

  • To highlight the diagnostic and evaluative capabilities of SPECT/CT.
  • To underscore the role of SPECT/CT in characterizing lesions and monitoring therapy response.
  • To emphasize the importance of SPECT/CT in preclinical research for novel tracer development.

Main Methods:

  • Utilizing hybrid SPECT/CT technology for enhanced anatomical localization.
  • Applying SPECT/CT for lesion characterization in bone scintigraphy and radioiodine imaging.
  • Employing preclinical SPECT/CT for biodistribution and kinetic studies of novel tracers.

Main Results:

  • SPECT/CT significantly increases diagnostic confidence through precise lesion localization.
  • It aids in characterizing lesions, particularly in bone and thyroid cancer imaging.
  • Preclinical SPECT/CT offers superior spatial resolution for novel tracer evaluation.

Conclusions:

  • SPECT/CT enhances the utility of current radiopharmaceuticals.
  • SPECT/CT plays a vital role in the development and assessment of new imaging tracers.
  • The technology improves anatomical correlation, aiding clinical decision-making and research.