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Title: Cerenkov luminescence endoscopy: Improved molecular sensitivity with β--emitting radiotracers

Journal Article · · Journal of Nuclear Medicine
 [1];  [2];  [1];  [1];  [1];  [3];  [1];  [4];  [1]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); Fourth Military Medical Univ., Shaanxi (China)
  3. Fourth Military Medical Univ., Shaanxi (China)
  4. Stanford Univ., Stanford, CA (United States); Stanford Univ. School of Medicine, Stanford, CA (United States)

Cerenkov luminescence endoscopy (CLE) is an optical technique that captures the Cerenkov photons emitted from highly energetic moving charged particles (β+ or β$$-$$) and can be used to monitor the distribution of many clinically available radioactive probes. A main limitation of CLE is its limited sensitivity to small concentrations of radiotracer, especially when used with a light guide. We investigated the improvement in the sensitivity of CLE brought about by using a β$$-$$ radiotracer that improved Cerenkov signal due to both higher β-particle energy and lower γ noise in the imaging optics because of the lack of positron annihilation. Here, the signal-to-noise ratio (SNR) of 90Y was compared with that of 18F in both phantoms and small-animal tumor models. Sensitivity and noise characteristics were demonstrated using vials of activity both at the surface and beneath 1 cm of tissue. Rodent U87MG glioma xenograft models were imaged with radiotracers bound to arginine-glycine-aspartate (RGD) peptides to determine the SNR. As a result, γ noise from 18F was demonstrated by both an observed blurring across the field of view and a more pronounced fall-off with distance. A decreased γ background and increased energy of the β particles resulted in a 207-fold improvement in the sensitivity of 90Y compared with 18F in phantoms. 90Y-bound RGD peptide produced a higher tumor-to-background SNR than 18F in a mouse model. In conclusion, the use of 90Y for Cerenkov endoscopic imaging enabled superior results compared with an 18F radiotracer.

Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
SC0008397; W81XWH-11-1-0087; W81XWH-11-1-0070; W81XWH-10-1-0506
OSTI ID:
1345590
Journal Information:
Journal of Nuclear Medicine, Vol. 55, Issue 11; ISSN 0161-5505
Publisher:
Society of Nuclear Medicine and Molecular ImagingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (8)

Radioluminescence in biomedicine: physics, applications, and models journal February 2019
Multiplexed imaging for diagnosis and therapy journal September 2017
Cerenkov luminescence imaging: physics principles and potential applications in biomedical sciences journal March 2017
Enhanced Cerenkov luminescence tomography analysis based on Y 2 O 3 :Eu 3+ rare earth oxide nanoparticles journal January 2018
A novel in vivo Cerenkov luminescence image‐guided surgery on primary and metastatic colorectal cancer journal December 2019
Intratumoral treatment with radioactive beta-emitting microparticles: a systematic review journal June 2017
Quantitative Measurement of the Thyroid Uptake Function of Mouse by Cerenkov Luminescence Imaging journal July 2017
Correlation between positron emission tomography and Cerenkov luminescence imaging in vivo and ex vivo using 64Cu-labeled antibodies in a neuroblastoma mouse model journal September 2016