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Comparison of myocardial F-18 FDG uptake between overnight and non-overnight fasting in non-diabetic healthy subjects

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Abstract

Purpose

To evaluate whether an overnight or non-overnight fast for suppressing physiological FDG uptake by the myocardium is better in non-diabetic healthy subjects before F-18 FDG PET/CT studies.

Materials and methods

One hundred two subjects who underwent whole-body F-18 FDG PET/CT for routine health checkups were retrospectively reviewed. For quantitative assessment, a region of interest was drawn around the entire left ventricle visible in the axial view containing the highest visual uptake in order to measure the maximum standardized uptake value (SUVmax). FDG uptake in the myocardium was visually graded as follows: grade 0 = minimal, 1 = mostly minimal or mild, 2 = mostly intense or moderate, and 3 = homogeneously intense. Adequate suppression of myocardial uptake was quantitatively defined as a SUVmax ≤5.0 and grade 0 by visual assessment.

Results

With regard to the SUVmax, myocardial uptake was not different between the overnight and the non-overnight fasting subjects (P = 0.753). In subjects who had adequate suppression of myocardial uptake, no significant difference was observed between the overnight and non-overnight fasting subjects either in terms of visual or quantitative assessment (P = 0.539 and P = 0.678, respectively).

Conclusion

Both overnight and non-overnight fasts are not adequate for suppressing the physiological uptake of FDG by the myocardium.

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Conflict of interest

The authors declare that they have no conflict of interest.

Informed consent

The requirement for informed consent was waived as this study was a minimal-risk retrospective study using a review of patient records.

Ethical statement

All procedures performed in the study involving human participants were in accordance with the ethical standards of the institutional review board and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Authors and Affiliations

  1. Department of Nuclear Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea

    Hyo Young Lee

  2. Department of Nuclear Medicine, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, 158, Paryong-ro, MasanHoewon-gu, Changwon, 630-723, Korea

    Hyun-Yeol Nam

  3. Department of Radiology, Dong-A University Medical Center, Busan, Korea

    Seong Kyu Shin

Authors
  1. Hyo Young Lee
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  2. Hyun-Yeol Nam
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Correspondence to Hyun-Yeol Nam.

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Lee, H.Y., Nam, HY. & Shin, S.K. Comparison of myocardial F-18 FDG uptake between overnight and non-overnight fasting in non-diabetic healthy subjects. Jpn J Radiol 33, 385–391 (2015). https://doi.org/10.1007/s11604-015-0428-z

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  • DOI: https://doi.org/10.1007/s11604-015-0428-z

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