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Single-photon emission computed tomography/computed tomography: basic instrumentation and innovations.

Michael K O'Connor1, Brad J Kemp

  • 1Department of Nuclear Medicine, Mayo Clinic, Rochester, MN 55905, USA. mkoconnor@mayo.edu

Seminars in Nuclear Medicine
|September 5, 2006
PubMed
Summary
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Modern SPECT/CT systems integrate anatomical and functional imaging for improved diagnostics. Advances in image fusion and SPECT/CT technology offer enhanced precision in localization, definition, and surgical guidance.

Area of Science:

  • Medical Imaging
  • Nuclear Medicine
  • Radiology

Background:

  • Single-photon emission computed tomography (SPECT) provides functional information, while computed tomography (CT) offers anatomical detail.
  • Combining SPECT and CT (SPECT/CT) enhances diagnostic capabilities through improved localization and definition of organs and lesions.
  • Technical advancements, including software for image fusion and integrated SPECT/CT systems, have evolved significantly over the past two decades.

Purpose of the Study:

  • To review the development and clinical integration of SPECT/CT systems.
  • To highlight the advantages of combined SPECT/CT imaging, such as anatomical referencing and attenuation correction.
  • To discuss the technical challenges and future trends in SPECT/CT technology.

Main Methods:

Related Experiment Videos

  • Review of technical developments in SPECT/CT systems and image fusion techniques.
  • Analysis of the integration of CT scanners with SPECT systems, ranging from add-ons to full integration.
  • Discussion of clinical applications and technical considerations of SPECT/CT devices.

    • Main Results:

    • The development of SPECT/CT systems has progressed from early image fusion to integrated multidetector CT (MDCT) scanners.
    • Combined SPECT/CT offers significant benefits for anatomical referencing and attenuation correction, improving diagnostic precision.
    • Technical challenges include cost, radiation dose, planning, siting, table sag, and motion artifacts, particularly in cardiac imaging.

    Conclusions:

    • SPECT/CT technology offers substantial advantages for clinical decision-making and surgical precision.
    • Ongoing technological maturation is expected to yield a range of SPECT/CT devices with varying CT capabilities.
    • The clinical value and justification of advanced SPECT/CT systems will depend on demonstrating clear benefits in practice.