PMID: 15379020Sep 24, 2004Paper

Development of an MR-compatible gamma probe for combined MR/RI guided surgery

Physics in Medicine and Biology
Seiichi YamamotoMichio Senda

Abstract

We have developed and tested an MR-compatible gamma probe to simultaneously obtain anatomical information and functional information during surgery. The probe consists of a probe head, an optical fibre bundle and a photo-multiplier tube (PMT). The NaI(T1) scintillator contained in the probe head is connected to a 7 m optical fibre bundle that transfers the scintillation photons produced in the NaI(T1) to an area of low magnetic field or out of the MR-scanner's magnetic shielded room. Although the light loss due to the optical fibre bundle was more than 90%, the photo-peak of the gamma for Co-57 (122 keV) could be observed. The point spread function was 4.5 mm full width at half maximum (FWHM) at 5 mm from the collimator surface for 122 keV gamma photons. Furthermore, there was no sensitivity change outside the MR-scanner, inside the MR-scanner without scanning and inside the MR-scanner with scanning. The probe produced a small artefact on the phantom image of the MR-scanner due to the susceptibility difference of the alloy used for the collimator and the shield. However, the artefact was only limited to area surrounding the probe. These results indicate that the developed MR-compatible gamma probe will make it possible to reali...Continue Reading

References

Nov 19, 1997·Physics in Medicine and Biology·Y ShaoP K Marsden
Aug 7, 1999·European Journal of Nuclear Medicine·E J HoffmanJ S Iwanczyk

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Citations

Aug 7, 2007·British Journal of Neurosurgery·Y BhanotR V Parmeshwaran
Jul 28, 2019·Biomedizinische Technik. Biomedical Engineering·Ali Pashazadeh, Michael Friebe
May 31, 2012·Physics in Medicine and Biology·Seong Jong HongJae Sung Lee
Dec 16, 2011·Physics in Medicine and Biology·Seiichi YamamotoJun Hatazawa
Jun 2, 2016·Physics in Medicine and Biology·Hye Min Park, Koan Sik Joo
Jul 13, 2018·European Journal of Hybrid Imaging·Sikkandhar MusafarganiBalázs Gulyás

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