Feasibility study of fluorine-18 labeled dopa for melanoma imaging

Kiichi Ishiwata, Tatsuo Ido, Toshihiro Takahashi, Ren Iwata, Frank Brady, Jun Hatazawa, Masatoshi Itoh

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8 Citations (Scopus)


Feasibility of fluorine-18 labeled l-dopa for melanoma imaging was investigated. In B16 melanoma-bearing mice given 2-[18F]fluoro-l-dopa, the radioactivity in the B16 decreased for the first 60 min and then remained constant, while all other tissues investigated decreased with time. High tumor uptake ratios for all other tissues except for the pancreas were obtained at 120 min. 6-[18F]Fluoro-l-dopa showed a similar tissue distribution. However, the B16 uptake was about half that value for the 2-fluoro analogue. A higher incorporation rate of 2-[18F]fluoro-l-dopa into the acid-precipitable fraction of the melanoma also showed that the 2-[18F]fluoro-l-dopa was a preferable melanin precursor. Among the four kinds of non-melanoma tumors in mice or rats three tumors showed an uptake of 2-[18F]fluoro-l-dopa similar to the B16 at 60 min. However, larger melanoma-to-tissue uptake ratios were observed when compared to non-melanoma tumors.

Original languageEnglish
Pages (from-to)371-374
Number of pages4
JournalInternational Journal of Radiation Applications and Instrumentation.
Issue number4
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Medicine(all)


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