Transport of Intensity Diffraction Tomography with Non-interferometric Synthetic Aperture for Three-dimensional Label-free Microscopy
Overview
Affiliations
We present a new label-free three-dimensional (3D) microscopy technique, termed transport of intensity diffraction tomography with non-interferometric synthetic aperture (TIDT-NSA). Without resorting to interferometric detection, TIDT-NSA retrieves the 3D refractive index (RI) distribution of biological specimens from 3D intensity-only measurements at various illumination angles, allowing incoherent-diffraction-limited quantitative 3D phase-contrast imaging. The unique combination of z-scanning the sample with illumination angle diversity in TIDT-NSA provides strong defocus phase contrast and better optical sectioning capabilities suitable for high-resolution tomography of thick biological samples. Based on an off-the-shelf bright-field microscope with a programmable light-emitting-diode (LED) illumination source, TIDT-NSA achieves an imaging resolution of 206 nm laterally and 520 nm axially with a high-NA oil immersion objective. We validate the 3D RI tomographic imaging performance on various unlabeled fixed and live samples, including human breast cancer cell lines MCF-7, human hepatocyte carcinoma cell lines HepG2, mouse macrophage cell lines RAW 264.7, Caenorhabditis elegans (C. elegans), and live Henrietta Lacks (HeLa) cells. These results establish TIDT-NSA as a new non-interferometric approach to optical diffraction tomography and 3D label-free microscopy, permitting quantitative characterization of cell morphology and time-dependent subcellular changes for widespread biological and medical applications.
Zhou Z, Zhang R, Zhou N, Chen Q, Zuo C Biomed Opt Express. 2025; 16(2):837-848.
PMID: 39958838 PMC: 11828454. DOI: 10.1364/BOE.545258.
Transport-of-intensity phase imaging using commercially available confocal microscope.
Yoneda N, Sakamoto J, Tomoi T, Nemoto T, Tamada Y, Matoba O J Biomed Opt. 2024; 29(11):116002.
PMID: 39512418 PMC: 11542725. DOI: 10.1117/1.JBO.29.11.116002.
Quantitative phase imaging endoscopy with a metalens.
Shanker A, Froch J, Mukherjee S, Zhelyeznyakov M, Brunton S, Seibel E Light Sci Appl. 2024; 13(1):305.
PMID: 39511136 PMC: 11543855. DOI: 10.1038/s41377-024-01587-y.
Towards photoacoustic human imaging: Shining a new light on clinical diagnostics.
Wang Z, Yang F, Zhang W, Xiong K, Yang S Fundam Res. 2024; 4(5):1314-1330.
PMID: 39431136 PMC: 11489505. DOI: 10.1016/j.fmre.2023.01.008.
Ultrabroadband Optical Diffraction Tomography.
Hormann M, Camargo F, van Hulst N, Cerullo G, Liebel M ACS Photonics. 2024; 11(9):3680-3687.
PMID: 39310293 PMC: 11413850. DOI: 10.1021/acsphotonics.4c00797.