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Gamma probe
A gamma probe is a handheld device used with a Geiger-Muller tube or scintillation counter, for intraoperative use following interstitial injection of a radionuclide, to locate regional lymph nodes by their radioactivity.〔http://www.medilexicon.com/medicaldictionary.php?t=72153〕 It is used primarily for sentinel lymph node mapping and parathyroid surgery. The Gamma Probe is also used for RSL (Radioactive Seed Localization), to locate small and non-palpable breast lesions.
==History==
The sentinel node market experienced high growth in the early and mid 90's starting with melanoma sentinel node surgical search and breast cancer sentinel node staging; both are currently considered standards of care. Most surgeons propose node staging after a positive breast biopsy. New applications are being developed for parathyroid direct detection and intra-operative detection of cancerous tissue using tumor-seeking radiopharmaceuticals. Parathyroid detection is growing fast, while the intraoperative use of gamma probes for direct tumor detection is just emerging.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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