Abstract
Monitoring dynamic interactions of T cells migrating toward tumor is beneficial to understand how cancer immunotherapy works. Optical-resolution photoacoustic microscope (OR-PAM) can provide not only high spatial resolution but also deeper penetration than conventional optical microscopy. With the aid of exogenous contrast agents, the dual-wavelength OR-PAM can be applied to map the distribution of CD8+ cytotoxic T lymphocytes (CTLs) with gold nanospheres (AuNS) under 523nm laser irradiation and Hepta1-6 tumor spheres with indocyanine green (ICG) under 800nm irradiation. However, at 1K laser PRF, it takes approximately 20 minutes to obtain a full sample volume of 160 × 160 × 150 μm3. To increase the imaging rate, we propose a random non-uniform sparse sampling mechanism to achieve fast sparse photoacoustic data acquisition. The image recovery process is formulated as a low-rank matrix recovery (LRMR) based on compressed sensing (CS) theory. We show that it could be stably recovered via nuclear-norm minimization optimization problem to maintain image quality from a significantly fewer measurement. In this study, we use the dual-wavelength OR-PAM with CS to visualize T cell trafficking in a 3D culture system with higher temporal resolution. Data acquisition time is reduced by 40% in such sample volume where sampling density is 0.5. The imaging system reveals the potential to understand the dynamic cellular process for preclinical screening of anti-cancer drugs.
| Original language | English |
|---|---|
| Title of host publication | Photons Plus Ultrasound |
| Subtitle of host publication | Imaging and Sensing 2018 |
| Editors | Lihong V. Wang, Alexander A. Oraevsky |
| Publisher | SPIE |
| ISBN (Electronic) | 9781510614734 |
| DOIs | |
| State | Published - 2018 |
| Externally published | Yes |
| Event | Photons Plus Ultrasound: Imaging and Sensing 2018 - San Francisco, United States Duration: 28 01 2018 → 01 02 2018 |
Publication series
| Name | Progress in Biomedical Optics and Imaging - Proceedings of SPIE |
|---|---|
| Volume | 10494 |
| ISSN (Print) | 1605-7422 |
Conference
| Conference | Photons Plus Ultrasound: Imaging and Sensing 2018 |
|---|---|
| Country/Territory | United States |
| City | San Francisco |
| Period | 28/01/18 → 01/02/18 |
Bibliographical note
Publisher Copyright:© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
Keywords
- 3D Cell Culture
- Compressed Sensing
- Matrix Completion
- Photoacoustic Microscopy
- Sparse Sampling
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