Cerenkov luminescence and PET imaging of 90 Y: capabilities and limitations in small animal applications

The in vivo sensitivity limits and quantification performance of Cerenkov luminescence imaging have been studied using a tissue-like mouse phantom and Y. For a small, 9 mm deep target in the phantom, with no background activity present, the Cerenkov luminescence Y detection limit determined from con...

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Veröffentlicht in:Physics in medicine & biology 2020-03, Vol.65 (6), p.065006
Hauptverfasser: Mitchell, Gregory S, Lloyd, P N Thomas, Cherry, Simon R
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description The in vivo sensitivity limits and quantification performance of Cerenkov luminescence imaging have been studied using a tissue-like mouse phantom and Y. For a small, 9 mm deep target in the phantom, with no background activity present, the Cerenkov luminescence Y detection limit determined from contrast-to-noise ratios is 10 nCi for a 2 min exposure with a sensitive CCD camera and no filters. For quantitative performance, the values extracted from regions of interest on the images are linear within 5% of a straight line fit versus target activity for target activity of 70 nCi and above. The small branching ratio to decay with positron emission for Y also permits low-statistics PET imaging of the radionuclide. For PET imaging of the same phantom, with a small animal LSO detector-based scanner, the Y detection limit is approximately 3 orders of magnitude higher at 10 µCi.
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subjects Animals
Electrons
Luminescence
Mice
Phantoms, Imaging
Positron-Emission Tomography - methods
Yttrium Radioisotopes
title Cerenkov luminescence and PET imaging of 90 Y: capabilities and limitations in small animal applications
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