Evaluation of the biodistribution of 11C-methionine in children and young adults

Sebastian M. Harris, James C. Davis, Scott E. Snyder, Elizabeth R. Butch, Amy L. Vavere, Mehmet Kocak, Barry L. Shulkin

Research output: Contribution to journalArticle

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Abstract

The purpose of this study was to evaluate the biodistribution of 11C-labeled methionine in non-tumor-involved organs in pediatric patients studied for malignant diseases. Methods: Ninety-three children and young adults with known or suspected malignancies underwent 11C- methionine PET and CT scans. Imaging began 5-15 min after injection of 740 MBq (20 mCi) per 1.7 m2 of body surface area. Images were acquired from the top of the head through the mid thighs. Standardized uptake values were determined using regions of interest drawn on the CT image and transferred to the corresponding transverse PET slice. Results: The highest concentrations of 11C-methionine were found in the pancreas and liver. Less intense uptake was seen in other regions, such as the salivary glands, tonsils, and bone marrow. There was little uptake in the lungs, fat (including brown adipose tissue), and muscle. Uptake in bone marrow, parotid glands, and tonsils was slightly but statistically significantly higher in men than women. Testicular, bone marrow, and left ventricular uptake increased with age. There was little variability statistically between comparisons of uptake change and groupings of age, race, sex, and patients studied at the time of diagnosis versus previously treated patients. Conclusion: High uptake of 11C-methionine is reliably found in the pancreas and liver, consistent with the anabolic functions of these organs. Low uptake in the brain, neck, chest, pelvis, and extremities will facilitate tumor localization in those areas. However, intense uptake in the upper abdomen may limit the diagnostic utility of 11C-methionine in that area.

Original languageEnglish (US)
Pages (from-to)1902-1908
Number of pages7
JournalJournal of Nuclear Medicine
Volume54
Issue number11
DOIs
StatePublished - Nov 1 2013

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Methionine
Young Adult
Bone Marrow
Palatine Tonsil
Pancreas
Brown Adipose Tissue
Body Surface Area
Liver
Parotid Gland
Thigh
Salivary Glands
Pelvis
Abdomen
Neoplasms
Neck
Thorax
Extremities
Fats
Head
Pediatrics

All Science Journal Classification (ASJC) codes

  • Radiology Nuclear Medicine and imaging

Cite this

Harris, S. M., Davis, J. C., Snyder, S. E., Butch, E. R., Vavere, A. L., Kocak, M., & Shulkin, B. L. (2013). Evaluation of the biodistribution of 11C-methionine in children and young adults. Journal of Nuclear Medicine, 54(11), 1902-1908. https://doi.org/10.2967/jnumed.112.118125

Evaluation of the biodistribution of 11C-methionine in children and young adults. / Harris, Sebastian M.; Davis, James C.; Snyder, Scott E.; Butch, Elizabeth R.; Vavere, Amy L.; Kocak, Mehmet; Shulkin, Barry L.

In: Journal of Nuclear Medicine, Vol. 54, No. 11, 01.11.2013, p. 1902-1908.

Research output: Contribution to journalArticle

Harris, SM, Davis, JC, Snyder, SE, Butch, ER, Vavere, AL, Kocak, M & Shulkin, BL 2013, 'Evaluation of the biodistribution of 11C-methionine in children and young adults', Journal of Nuclear Medicine, vol. 54, no. 11, pp. 1902-1908. https://doi.org/10.2967/jnumed.112.118125
Harris, Sebastian M. ; Davis, James C. ; Snyder, Scott E. ; Butch, Elizabeth R. ; Vavere, Amy L. ; Kocak, Mehmet ; Shulkin, Barry L. / Evaluation of the biodistribution of 11C-methionine in children and young adults. In: Journal of Nuclear Medicine. 2013 ; Vol. 54, No. 11. pp. 1902-1908.
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