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Related Experiment Videos

Can body volume be determined by PET?

Michael Hentschel1, Dominik Paul, Ulrike Korsten-Reck

  • 1Division of Nuclear Medicine, Section of Positron Emission Tomography, University Hospital Freiburg, Hugstetter Strasse 55, 79106, Freiburg, Germany. michael.hentschel@uniklinik-freiburg.de

European Journal of Nuclear Medicine and Molecular Imaging
|December 16, 2004
PubMed
Summary
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Positron emission tomography (PET) can accurately measure whole-body volume, enabling lean body mass (LBM) calculation. This allows for body weight-independent standardized uptake values (SUVs) in oncological imaging.

Area of Science:

  • Nuclear Medicine
  • Medical Imaging
  • Oncology

Background:

  • Standardized uptake value (SUV) normalization in PET imaging often relies on body weight.
  • Lean body mass (LBM) offers a more accurate normalization factor, but requires precise body volume determination.
  • Positron emission tomography (PET) offers potential for non-invasive volume assessment.

Purpose of the Study:

  • To determine if PET can be used to measure total body volume.
  • To compare the precision of PET-derived volume measurements with an established standard method.
  • To assess the feasibility of calculating body weight-independent SUVs using PET-derived LBM.

Main Methods:

  • Whole-body PET transmission scans were performed on ten oncological patients.
  • Whole-body volume was determined using PET imaging.

Related Experiment Videos

  • Air displacement plethysmography (BOD POD) served as the reference standard for volume measurement.

    • Main Results:

    • Whole-body volumes were successfully determined in all patients by both PET and the BOD POD method.
    • Bland-Altman analysis showed excellent agreement between the two methods, with a mean difference of -0.14 L.
    • The relative systematic error was less than 0.1%, supporting the equality of measurements.

    Conclusions:

    • PET is a viable supplementary method for determining whole-body volume and body fat in cancer patients.
    • Accurate LBM calculation from PET-derived volume facilitates body weight-independent SUV (SUV(LBM)) determination.
    • This approach enhances the accuracy of quantitative PET analyses in oncology.