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Published in: EJNMMI Research 1/2020

01-12-2020 | Magnetic Resonance Imaging | Original research

A near-infrared probe for non-invasively monitoring cerebrospinal fluid flow by 18F-positron emitting tomography and fluorescence

Authors: Hua Guo, Harikrishna Kommidi, Carl C. Lekaye, Jason Koutcher, Martin S. Judenhofer, Simon R. Cherry, Amy P. Wu, Oguz Akin, Mark M. Souweidane, Omer Aras, Zhaohui Zhu, Richard Ting

Published in: EJNMMI Research | Issue 1/2020

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Abstract

Purpose

Knowing the precise flow of cerebrospinal fluid (CSF) is important in the management of multiple neurological diseases. Technology for non-invasively quantifying CSF flow would allow for precise localization of injury and assist in evaluating the viability of certain devices placed in the central nervous system (CNS).

Methods

We describe a near-infrared fluorescent dye for accurately monitoring CSF flow by positron emission tomography (PET) and fluorescence. IR-783, a commercially available near-infrared dye, was chemically modified and radiolabeled with fluorine-18 to give [18F]-IR783-AMBF3. [18F]-IR783-AMBF3 was intrathecally injected into the rat models with normal and aberrant CSF flow and evaluated by the fluorescence and PET/MRI or PET/CT imaging modes.

Results

IR783-AMBF3 was clearly distributed in CSF-containing volumes by PET and fluorescence. We compared IR783-AMBF3 (fluorescent at 778/793 nm, ex/em) to a shorter-wavelength, fluorescein equivalent (fluorescent at 495/511 nm, ex/em). IR783-AMBF3 was superior for its ability to image through blood (hemorrhage) and for imaging CSF-flow, through-skin, in subdural-run lumboperitoneal shunts. IR783-AMBF3 was safe under the tested dosage both in vitro and in vivo.

Conclusion

The superior imaging properties of IR783-AMBF3 could lead to enhanced accuracy in the treatment of patients and would assist surgeons in non-invasively diagnosing diseases of the CNS.
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Metadata
Title
A near-infrared probe for non-invasively monitoring cerebrospinal fluid flow by 18F-positron emitting tomography and fluorescence
Authors
Hua Guo
Harikrishna Kommidi
Carl C. Lekaye
Jason Koutcher
Martin S. Judenhofer
Simon R. Cherry
Amy P. Wu
Oguz Akin
Mark M. Souweidane
Omer Aras
Zhaohui Zhu
Richard Ting
Publication date
01-12-2020
Publisher
Springer Berlin Heidelberg
Published in
EJNMMI Research / Issue 1/2020
Electronic ISSN: 2191-219X
DOI
https://doi.org/10.1186/s13550-020-0609-3

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