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Wang S, Liu X. Virtual double-slit differential dark-field chromatic line confocal imaging technology. OPTICS LETTERS 2023; 48:904-907. [PMID: 36790971 DOI: 10.1364/ol.479982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/09/2023] [Indexed: 06/18/2023]
Abstract
Chromatic line confocal imaging (LCI) can be used in high-speed 3D imaging of surface morphology, roughness, and multi-layered transparent media in industrial production, quality inspection, and other fields. However, even if they are compensated for or corrected accordingly, the resolution of the built measurement system differs from the theoretical design. In particular, to guarantee high-speed measurement characteristics of the LCI system, a mass center algorithm with poor accuracy is usually chosen for peak extraction, and with the improvement of the manufacturing level, the axial resolution of the measurement system also puts forward higher requirements. Therefore, in this Letter, we propose a virtual double-slit differential dark-field chromatic LCI (VDSDD-LCI) technology. Our approach can reconstruct the optical 3D profile with higher axial resolution and signal-to-noise ratio (SNR) by reducing the full width at half maximums (FWHMs) of the axial response curve without changing the components of the completed LCI system. The experiments on a coin and scrive board surface demonstrate the validity of the proposed method.
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2
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Olshinka A, Ad-El D, Didkovski E, Weiss S, Ankri R, Goldenberg-Cohen N, Fixler D. Diffusion Reflection Measurements of Antibodies Conjugated to Gold Nanoparticles as a Method to Identify Cutaneous Squamous Cell Carcinoma Borders. MATERIALS 2020; 13:ma13020447. [PMID: 31963462 PMCID: PMC7014005 DOI: 10.3390/ma13020447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/06/2020] [Accepted: 01/13/2020] [Indexed: 12/13/2022]
Abstract
Diffusion reflectance spectroscopy measurements targeted with gold nanoparticles (GNPs) can identify residual cutaneous squamous cell carcinoma (SCC) in excision borders. Human SCC specimens were stained with hematoxylin and eosin to identify tumor borders, and reflected onto an unstained deparaffinized section. Diffusion reflection of three sites (normal and SCC) were measured before and after GNPs targeting. Hyperspectral imaging showed a mean of 2.5 sites with tumor per specimen and 1.2 tumor-free (p < 0.05, t-test). GNPs were detected in 25/30 tumor sites (sensitivity 83.3%, false-negative rate 16.6%) and 12/30 non-tumor sites (specificity 60%, false-positive rate 40%). This study verifies the use of nanotechnology in identifying SCC tumor margins. Diffusion reflection scanning has high sensitivity for detecting the residual tumor.
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Affiliation(s)
- Asaf Olshinka
- Department of Plastic Surgery, Rabin Medical Center—Beilinson Hospital, Petach Tikva 4941492, Israel; (A.O.); (D.A.-E.)
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (E.D.); (S.W.)
| | - Dean Ad-El
- Department of Plastic Surgery, Rabin Medical Center—Beilinson Hospital, Petach Tikva 4941492, Israel; (A.O.); (D.A.-E.)
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (E.D.); (S.W.)
| | - Elena Didkovski
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (E.D.); (S.W.)
- Department of Pathology and Cytology, Rabin Medical Center—Beilinson Hospital, Petach Tikva 4941492, Israel
| | - Shirel Weiss
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; (E.D.); (S.W.)
- The Krieger Eye Research Laboratory, Felsenstein Medical Research Center, Petach Tikva 49100, Israel
| | - Rinat Ankri
- Faculty of Engineering and Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan 5290002, Israel;
| | - Nitza Goldenberg-Cohen
- The Krieger Eye Research Laboratory, Felsenstein Medical Research Center, Petach Tikva 49100, Israel
- Ruth and Bruce Rappaport Faculty of Medicine, The Technion—Technical Institute of Israel, Haifa 3200003, Israel
- Department of Ophthalmology, Bnai Zion Medical Center, Haifa 3339419, Israel
- Correspondance: (N.G.-C.); (D.F.); Tel.: +972-4-835-9554 (N.G.-C.); +972-3-531-7598 (D.F.)
| | - Dror Fixler
- Faculty of Engineering and Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan 5290002, Israel;
- Correspondance: (N.G.-C.); (D.F.); Tel.: +972-4-835-9554 (N.G.-C.); +972-3-531-7598 (D.F.)
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3
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Wei L, Yin C, Liu JTC. Dual-axis confocal microscopy for point-of-care pathology. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS : A PUBLICATION OF THE IEEE LASERS AND ELECTRO-OPTICS SOCIETY 2019; 25:7100910. [PMID: 30872909 PMCID: PMC6411089 DOI: 10.1109/jstqe.2018.2854572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Dual-axis confocal (DAC) microscopy is an optical imaging modality that utilizes simple low-numerical aperture (NA) lenses to achieve effective optical sectioning and superior image contrast in biological tissues. The unique architecture of DAC microscopy also provides some advantages for miniaturization, facilitating the development of endoscopic and handheld DAC systems for in vivo imaging. This article reviews the principles of DAC microscopy, including its differences from conventional confocal microscopy, and surveys several variations of DAC microscopy that have been developed and investigated as non-invasive real-time alternatives to conventional biopsy and histopathology.
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Affiliation(s)
- Linpeng Wei
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195 USA, JTCL is also with the Department of Pathology at the University of Washington
| | - Chengbo Yin
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195 USA, JTCL is also with the Department of Pathology at the University of Washington
| | - Jonathan T C Liu
- Department of Mechanical Engineering, University of Washington, Seattle, WA 98195 USA, JTCL is also with the Department of Pathology at the University of Washington
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Gareau DS, Krueger JG, Hawkes JE, Lish SR, Dietz MP, Mülberger AG, Mu EW, Stevenson ML, Lewin JM, Meehan SA, Carucci JA. Line scanning, stage scanning confocal microscope (LSSSCM). BIOMEDICAL OPTICS EXPRESS 2017; 8:3807-3815. [PMID: 28856051 PMCID: PMC5560842 DOI: 10.1364/boe.8.003807] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Revised: 07/07/2017] [Accepted: 07/08/2017] [Indexed: 05/24/2023]
Abstract
For rapid pathological assessment of large surgical tissue excisions with cellular resolution, we present a line scanning, stage scanning confocal microscope (LSSSCM). LSSSCM uses no scanning mirrors. Laser light is focused with a single cylindrical lens to a line of diffraction-limited width directly into the (Z) sample focal plane, which is parallel to and near the flattened specimen surface. Semi-confocal optical sections are derived from the linear array distribution (Y) and a single mechanical drive that moves the sample parallel to the focal plane and perpendicular to the focused line (X). LSSSCM demonstrates cellular resolution in the conditions of high nuclear density within micronodular basal cell carcinoma.
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Affiliation(s)
- Daniel S. Gareau
- Investigative Dermatology, The Rockefeller University, 1230 York Ave., New York, NY 10065,
USA
| | - James G. Krueger
- Investigative Dermatology, The Rockefeller University, 1230 York Ave., New York, NY 10065,
USA
| | - Jason E. Hawkes
- Investigative Dermatology, The Rockefeller University, 1230 York Ave., New York, NY 10065,
USA
| | - Samantha R. Lish
- Investigative Dermatology, The Rockefeller University, 1230 York Ave., New York, NY 10065,
USA
| | - Michael P. Dietz
- Investigative Dermatology, The Rockefeller University, 1230 York Ave., New York, NY 10065,
USA
| | - Alba Guembe Mülberger
- Investigative Dermatology, The Rockefeller University, 1230 York Ave., New York, NY 10065,
USA
| | - Euphemia W. Mu
- Ronald O. Pearleman Department of Dermatology, New York University, 240 E. 38th St., New York, NY 10016,
USA
| | - Mary L. Stevenson
- Ronald O. Pearleman Department of Dermatology, New York University, 240 E. 38th St., New York, NY 10016,
USA
| | - Jesse M. Lewin
- Department of Dermatology, Columbia University Medical Center, 161 Fort Washington Avenue, 12th Floor, New York, NY 10032,
USA
| | - Shane A. Meehan
- Ronald O. Pearleman Department of Dermatology, New York University, 240 E. 38th St., New York, NY 10016,
USA
| | - John A. Carucci
- Ronald O. Pearleman Department of Dermatology, New York University, 240 E. 38th St., New York, NY 10016,
USA
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Trịnh HX, Lin ST, Chen LC, Yeh SL, Chen CS, Hoang HH. Shearing interference microscope for step-height measurements. J Microsc 2017; 266:178-185. [PMID: 28267883 DOI: 10.1111/jmi.12527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 12/30/2016] [Accepted: 01/08/2017] [Indexed: 11/28/2022]
Abstract
A shearing interference microscope using a Savart prism as the shear plate is proposed for inspecting step-heights. Where the light beam propagates through the Savart prism and microscopic system to illuminate the sample, it then turns back to re-pass through the Savart prism and microscopic system to generate a shearing interference pattern on the camera. Two measurement modes, phase-shifting and phase-scanning, can be utilized to determine the depths of the step-heights on the sample. The first mode, which employs a narrowband source, is based on the five-step phase-shifting algorithm and has a measurement range of a quarter-wavelength. The second mode, which adopts a broadband source, is based on peak-intensity identification technology and has a measurement range up to a few micrometres. This paper is to introduce the configuration and measurement theory of this microscope, perform a setup used to implement it, and present the experimental results from the uses of the setup. The results not only verify the validity but also confirm the high measurement repeatability of the proposed microscope.
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Affiliation(s)
- Hưng-Xuân Trịnh
- Department of Electro-optical Engineering, National Taipei University of Technology, Taipei City, Taiwan
| | - Shyh-Tsong Lin
- Department of Electro-optical Engineering, National Taipei University of Technology, Taipei City, Taiwan
| | - Liang-Chia Chen
- Department of Mechanical Engineering, National Taiwan University, Taipei City, Taiwan
| | - Sheng-Lih Yeh
- Department of Mechanical Engineering, Lunghwa University of Science and Technology, Taoyuan City, Taiwan
| | - Chin-Sheng Chen
- Graduate Institute of Automation Technology, National Taipei University of Technology, Taipei City, Taiwan
| | - Hong-Hai Hoang
- School of Mechanical Engineering, Hanoi University of Science and Technology, 01 Dai Co Viet Street, Hanoi City, Viet Nam
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6
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Zhu B, Shen S, Zheng Y, Gong W, Si K. Numerical studies of focal modulation microscopy in high-NA system. OPTICS EXPRESS 2016; 24:19138-19147. [PMID: 27557193 DOI: 10.1364/oe.24.019138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
High spatial resolution with deep imaging penetration depth is the main advantage of focal modulation microscopy (FMM). This paper investigates effects of polarization on FMM in a high-NA system based on vectorial diffraction theory. Compared with confocal microscopy, FMM shows a 20.1% improvement in axial resolution. The performance of different polarization patterns is also discussed numerically. The study on polarization modulation may provide a new way to obtain a tighter focal spot.
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7
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Fu HL, Mueller JL, Whitley MJ, Cardona DM, Willett RM, Kirsch DG, Brown JQ, Ramanujam N. Structured Illumination Microscopy and a Quantitative Image Analysis for the Detection of Positive Margins in a Pre-Clinical Genetically Engineered Mouse Model of Sarcoma. PLoS One 2016; 11:e0147006. [PMID: 26799613 PMCID: PMC4723137 DOI: 10.1371/journal.pone.0147006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 12/28/2015] [Indexed: 11/18/2022] Open
Abstract
Intraoperative assessment of surgical margins is critical to ensuring residual tumor does not remain in a patient. Previously, we developed a fluorescence structured illumination microscope (SIM) system with a single-shot field of view (FOV) of 2.1 × 1.6 mm (3.4 mm2) and sub-cellular resolution (4.4 μm). The goal of this study was to test the utility of this technology for the detection of residual disease in a genetically engineered mouse model of sarcoma. Primary soft tissue sarcomas were generated in the hindlimb and after the tumor was surgically removed, the relevant margin was stained with acridine orange (AO), a vital stain that brightly stains cell nuclei and fibrous tissues. The tissues were imaged with the SIM system with the primary goal of visualizing fluorescent features from tumor nuclei. Given the heterogeneity of the background tissue (presence of adipose tissue and muscle), an algorithm known as maximally stable extremal regions (MSER) was optimized and applied to the images to specifically segment nuclear features. A logistic regression model was used to classify a tissue site as positive or negative by calculating area fraction and shape of the segmented features that were present and the resulting receiver operator curve (ROC) was generated by varying the probability threshold. Based on the ROC curves, the model was able to classify tumor and normal tissue with 77% sensitivity and 81% specificity (Youden's index). For an unbiased measure of the model performance, it was applied to a separate validation dataset that resulted in 73% sensitivity and 80% specificity. When this approach was applied to representative whole margins, for a tumor probability threshold of 50%, only 1.2% of all regions from the negative margin exceeded this threshold, while over 14.8% of all regions from the positive margin exceeded this threshold.
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Affiliation(s)
- Henry L. Fu
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, United States of America
| | - Jenna L. Mueller
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, United States of America
| | - Melodi J. Whitley
- Department of Pharmacology & Cancer Biology, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Diana M. Cardona
- Department of Pathology, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Rebecca M. Willett
- Department of Electrical and Computer Engineering, University of Wisconsin—Madison, Madison, Wisconsin, United States of America
| | - David G. Kirsch
- Department of Pharmacology & Cancer Biology, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Radiation Oncology, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - J. Quincy Brown
- Department of Biomedical Engineering, Tulane University, New Orleans, Louisiana, United States of America
| | - Nimmi Ramanujam
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, United States of America
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8
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Leachman SA, Cassidy PB, Chen SC, Curiel C, Geller A, Gareau D, Pellacani G, Grichnik JM, Malvehy J, North J, Jacques SL, Petrie T, Puig S, Swetter SM, Tofte S, Weinstock MA. Methods of Melanoma Detection. Cancer Treat Res 2016; 167:51-105. [PMID: 26601859 DOI: 10.1007/978-3-319-22539-5_3] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Detection and removal of melanoma, before it has metastasized, dramatically improves prognosis and survival. The purpose of this chapter is to (1) summarize current methods of melanoma detection and (2) review state-of-the-art detection methods and technologies that have the potential to reduce melanoma mortality. Current strategies for the detection of melanoma range from population-based educational campaigns and screening to the use of algorithm-driven imaging technologies and performance of assays that identify markers of transformation. This chapter will begin by describing state-of-the-art methods for educating and increasing awareness of at-risk individuals and for performing comprehensive screening examinations. Standard and advanced photographic methods designed to improve reliability and reproducibility of the clinical examination will also be reviewed. Devices that magnify and/or enhance malignant features of individual melanocytic lesions (and algorithms that are available to interpret the results obtained from these devices) will be compared and contrasted. In vivo confocal microscopy and other cellular-level in vivo technologies will be compared to traditional tissue biopsy, and the role of a noninvasive "optical biopsy" in the clinical setting will be discussed. Finally, cellular and molecular methods that have been applied to the diagnosis of melanoma, such as comparative genomic hybridization (CGH), fluorescent in situ hybridization (FISH), and quantitative reverse transcriptase polymerase chain reaction (qRT-PCR), will be discussed.
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Affiliation(s)
- Sancy A Leachman
- Department of Dermatology and Knight Cancer Institute, Oregon Health and Science University, 3303 SW Bond Avenue, CH16D, Portland, OR, 97239, USA.
| | - Pamela B Cassidy
- Department of Dermatology and Knight Cancer Institute, Oregon Health and Science University, 3125 SW Sam Jackson Park Road, L468R, Portland, OR, 97239, USA.
| | - Suephy C Chen
- Department of Dermatology, Emory University School of Medicine, 1525 Clifton Road NE, 1st Floor, Atlanta, GA, 30322, USA.
| | - Clara Curiel
- Department of Dermatology and Arizona Cancer Center, University of Arizona, 1515 N Campbell Avenue, Tucson, AZ, 85721, USA.
| | - Alan Geller
- Department of Dermatology, Harvard School of Public Health and Massachusetts General Hospital, Landmark Center, 401 Park Drive, 3rd Floor East, Boston, MA, 02215, USA.
| | - Daniel Gareau
- Laboratory of Investigative Dermatology, The Rockefeller University, 1230 York Avenue, New York, NY, 10065, USA.
| | - Giovanni Pellacani
- Department of Dermatology, University of Modena and Reggio Emilia, Via del Pozzo 71, Modena, Italy.
| | - James M Grichnik
- Department of Dermatology and Cutaneous Surgery, University of Miami School of Medicine, Room 912, BRB (R-125), 1501 NW 10th Avenue, Miami, FL, 33136, USA.
| | - Josep Malvehy
- Melanoma Unit, Dermatology Department, Hospital Clinic Barcelona, Villarroel 170, 08036, Barcelona, Spain.
| | - Jeffrey North
- University of California, San Francisco, 1701 Divisadero Street, Suite 280, San Francisco, CA, 94115, USA.
| | - Steven L Jacques
- Department of Biomedical Engineering and Dermatology, Oregon Health and Science University, 3303 SW Bond Avenue, CH13B, Portland, OR, 97239, USA.
| | - Tracy Petrie
- Department of Biomedical Engineering, Oregon Health and Science University, 3303 SW Bond Avenue, CH13B, Portland, OR, 97239, USA.
| | - Susana Puig
- Melanoma Unit, Dermatology Department, Hospital Clinic Barcelona, Villarroel 170, 08036, Barcelona, Spain.
| | - Susan M Swetter
- Department of Dermatology/Cutaneous Oncology, Stanford University, 900 Blake Wilbur Drive, W3045, Stanford, CA, 94305, USA.
| | - Susan Tofte
- Department of Dermatology, Oregon Health and Science University, 3303 SW Bond Avenue, CH16D, Portland, OR, 97239, USA.
| | - Martin A Weinstock
- Departments of Dermatology and Epidemiology, Brown University, V A Medical Center 111D, 830 Chalkstone Avenue, Providence, RI, 02908, USA.
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Abstract
Mounting evidence suggests that a more extensive surgical resection is associated with an improved life expectancy for both low-grade and high-grade glioma patients. However, radiographically complete resections are not often achieved in many cases because of the lack of sensitivity and specificity of current neurosurgical guidance techniques at the margins of diffuse infiltrative gliomas. Intraoperative fluorescence imaging offers the potential to improve the extent of resection and to investigate the possible benefits of resecting beyond the radiographic margins. Here, we provide a review of wide-field and high-resolution fluorescence-imaging strategies that are being developed for neurosurgical guidance, with a focus on emerging imaging technologies and clinically viable contrast agents. The strengths and weaknesses of these approaches will be discussed, as well as issues that are being addressed to translate these technologies into the standard of care.
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Affiliation(s)
- Jonathan T C Liu
- *Department of Biomedical Engineering, Stony Brook University, Stony Brook, New York; ‡Barrow Brain Tumor Research Center, Division of Neurosurgical Oncology, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona
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Shelton RL, Mattison SP, Applegate BE. Volumetric imaging of erythrocytes using label-free multiphoton photoacoustic microscopy. JOURNAL OF BIOPHOTONICS 2014; 7:834-40. [PMID: 23963621 DOI: 10.1002/jbio.201300059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2013] [Revised: 07/29/2013] [Accepted: 07/30/2013] [Indexed: 05/11/2023]
Abstract
Photoacoustic microscopy (PAM) is an imaging modality well suited to mapping vasculature and other strong absorbers in tissue. However, one of the primary drawbacks to PAM when used for high-resolution imaging is the relatively poor axial resolution due to the inverse dependence on the transducer bandwidth. While submicron lateral resolution PAM can be achieved by tightly focusing the excitation light, the axial resolution is fundamentally limited to 10s of microns for typical transducer frequencies. Here we present a multiphoton PAM technique called transient absorption ultrasonic microscopy (TAUM), which results in a completely optically resolved voxel with an experimentally measured axial resolution of 1.5 microns. This technique is demonstrated by imaging individual red blood cells in three dimensions in blood smear and ex vivo tissues. To the best of our knowledge, this is the first demonstration of fully resolved, volumetric photoacoustic imaging of erythrocytes.
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Affiliation(s)
- Ryan L Shelton
- Department of Biomedical Engineering, 5045 Emerging Technologies Building, 3120 TAMU, Texas A&M University, College Station, 77843, USA
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11
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Fixler D, Ankri R, Kaplan I, Novikov I, Hirshberg A. Diffusion Reflection: A Novel Method for Detection of Oral Cancer. J Dent Res 2014; 93:602-6. [PMID: 24695671 DOI: 10.1177/0022034514529973] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Accepted: 03/08/2014] [Indexed: 12/28/2022] Open
Abstract
Intraoperative detection of residual disease in oral cancer may reduce the high rate of recurrences. The aim of the present study was to evaluate the detection sensitivity of diffusion reflection (DR) measurements of bioconjugated gold nanorods (GNRs) to cancerous sites in a rat model of oral squamous cell carcinoma. We used hyperspectral spectroscopy and DR measurements of GNRs bioconjugated to slide specimens of rat tongues where squamous carcinoma was induced by 4NQO (4-nitroquinoline-N-oxide). Wistar-derived male rats were used: 6 were sacrificed at wk 32 to 37 following 4NQO administration (experimental rats), as were 2 control rats at wk 32 and 36. The detection results were compared with histopathology: 19 sites of cancerous changes were identified microscopically (11 invasive cancer and 8 carcinoma in situ [CIS]). The GNRs attached selectively to areas of carcinomatous changes with an intensity exceeding 17 intensity units at 780 nm (overall specificity, 97%; overall sensitivity, 87%) when the hyperspectral spectroscopy system was used. The resulting DR slopes of the reflected intensity showed an increase of >80% in areas of invasive cancer and an increase of >30% in the CIS sites. The resulting intensity units of the hyperspectral spectroscopy system in the invasive cancer significantly exceed those of the CIS (t test, p = .0002; Mann-Whitney, p = .0024). The results demonstrate a great potential of the direct DR scanning as a new and simple tool for detecting residual disease intraoperatively.
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Affiliation(s)
- D Fixler
- Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan, Israel
| | - R Ankri
- Faculty of Engineering and the Institute of Nanotechnology and Advanced Materials, Bar Ilan University, Ramat Gan, Israel
| | - I Kaplan
- Department of Oral Pathology and Oral Medicine, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - I Novikov
- Biostatistical Unit, Gertner Institute for Epidemiology and Health Policy Research, Ramat Gan, Israel
| | - A Hirshberg
- Department of Oral Pathology and Oral Medicine, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
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12
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Fu HL, Mueller JL, Javid MP, Mito JK, Kirsch DG, Ramanujam N, Brown JQ. Optimization of a widefield structured illumination microscope for non-destructive assessment and quantification of nuclear features in tumor margins of a primary mouse model of sarcoma. PLoS One 2013; 8:e68868. [PMID: 23894357 PMCID: PMC3720887 DOI: 10.1371/journal.pone.0068868] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Accepted: 06/02/2013] [Indexed: 11/25/2022] Open
Abstract
Cancer is associated with specific cellular morphological changes, such as increased nuclear size and crowding from rapidly proliferating cells. In situ tissue imaging using fluorescent stains may be useful for intraoperative detection of residual cancer in surgical tumor margins. We developed a widefield fluorescence structured illumination microscope (SIM) system with a single-shot FOV of 2.1×1.6 mm (3.4 mm2) and sub-cellular resolution (4.4 µm). The objectives of this work were to measure the relationship between illumination pattern frequency and optical sectioning strength and signal-to-noise ratio in turbid (i.e. thick) samples for selection of the optimum frequency, and to determine feasibility for detecting residual cancer on tumor resection margins, using a genetically engineered primary mouse model of sarcoma. The SIM system was tested in tissue mimicking solid phantoms with various scattering levels to determine impact of both turbidity and illumination frequency on two SIM metrics, optical section thickness and modulation depth. To demonstrate preclinical feasibility, ex vivo 50 µm frozen sections and fresh intact thick tissue samples excised from a primary mouse model of sarcoma were stained with acridine orange, which stains cell nuclei, skeletal muscle, and collagenous stroma. The cell nuclei were segmented using a high-pass filter algorithm, which allowed quantification of nuclear density. The results showed that the optimal illumination frequency was 31.7 µm−1 used in conjunction with a 4×0.1 NA objective ( = 0.165). This yielded an optical section thickness of 128 µm and an 8.9×contrast enhancement over uniform illumination. We successfully demonstrated the ability to resolve cell nuclei in situ achieved via SIM, which allowed segmentation of nuclei from heterogeneous tissues in the presence of considerable background fluorescence. Specifically, we demonstrate that optical sectioning of fresh intact thick tissues performed equivalently in regards to nuclear density quantification, to physical frozen sectioning and standard microscopy.
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Affiliation(s)
- Henry L Fu
- Department of Biomedical Engineering, Duke University, Durham, North Carolina, USA.
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13
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Chen Y, Liu JTC. Optimizing the performance of dual-axis confocal microscopes via Monte-Carlo scattering simulations and diffraction theory. JOURNAL OF BIOMEDICAL OPTICS 2013; 18:066006. [PMID: 23733022 PMCID: PMC3670619 DOI: 10.1117/1.jbo.18.6.066006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 04/26/2013] [Accepted: 05/03/2013] [Indexed: 05/20/2023]
Abstract
Dual-axis confocal (DAC) microscopy has been found to exhibit superior rejection of out-of-focus and multiply scattered background light compared to conventional single-axis confocal microscopy. DAC microscopes rely on the use of separated illumination and collection beam paths that focus and intersect at a single focal volume (voxel) within tissue. While it is generally recognized that the resolution and contrast of a DAC microscope depends on both the crossing angle of the DAC beams, 2θ, and the focusing numerical aperture of the individual beams, α, a detailed study to investigate these dependencies has not been performed. Contrast and resolution are considered as two main criteria to assess the performance of a point-scanned DAC microscope (DAC-PS) and a line-scanned DAC microscope (DAC-LS) as a function of θ and α. The contrast and resolution of these designs are evaluated by Monte-Carlo scattering simulations and diffraction theory calculations, respectively. These results can be used for guiding the optimal designs of DAC-PS and DAC-LS microscopes.
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Affiliation(s)
- Ye Chen
- Stony Brook University (SUNY), Department of Biomedical Engineering, Stony Brook, New York 11794
| | - Jonathan T. C. Liu
- Stony Brook University (SUNY), Department of Biomedical Engineering, Stony Brook, New York 11794
- Address all correspondence to: Jonathan T. C. Liu, Stony Brook University (SUNY), Department of Biomedical Engineering, Stony Brook, New York 11794. Tel: 631-632-1727; Fax: 631-632-3222; E-mail:
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14
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van Veggel FCJM, Dong C, Johnson NJJ, Pichaandi J. Ln(3+)-doped nanoparticles for upconversion and magnetic resonance imaging: some critical notes on recent progress and some aspects to be considered. NANOSCALE 2012; 4:7309-7321. [PMID: 23086529 DOI: 10.1039/c2nr32124f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this feature article we will critically discuss the synthesis and characterisation aspects of Ln(3+)-doped nanoparticles (NPs) that show upconversion, upon 980 nm excitation. Upconversion is a non-linear process that converts two or more low-energy photons, often near-infrared photons, into one of higher energy, e.g. blue and 800 nm from Tm(3+) and green and red from Er(3+) or Ho(3+). Nearly all researchers use the absorption of 980 nm light by Yb(3+) as the sensitiser for the co-doped emissive Ln(3+) ions. The focus will be on LnF(3) and MLnF(4) (M = alkali metal) as the host matrix, because most progress has been made with these. In particular we will argue that a detailed understanding of how the dopant ions and the host Ln(3+) ions are distributed (in the core) and how (doped) shell growth occurs is not well understood. Moreover, their use as optical and magnetic resonance imaging contrast agents will be discussed. We will argue that deep-tissue imaging beyond 600 μm with retention of optical resolution, i.e. to see fine structure such as blood capillaries in brain tissues, has not yet been achieved. Three key parameters have been identified as impediments: (i) the low absorption efficiency of the Yb(3+) sensitiser, (ii) the low quantum yield of upconversion, and (iii) the long-lived excited states. On the other hand, there are very encouraging results that suggest that these nanoparticles could be developed into very potent magnetic resonance imaging (MRI) contrast agents.
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Affiliation(s)
- Frank C J M van Veggel
- University of Victoria, Department of Chemistry, PO Box 3065, Victoria, British Columbia, Canada V8W 3V6.
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15
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Patel YG, Rajadhyaksha M, DiMarzio CA. Optimization of pupil design for point-scanning and line-scanning confocal microscopy. BIOMEDICAL OPTICS EXPRESS 2011; 2:2231-2242. [PMID: 21833360 PMCID: PMC3149521 DOI: 10.1364/boe.2.002231] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 07/06/2011] [Accepted: 07/07/2011] [Indexed: 05/29/2023]
Abstract
Both point-scanning and line-scanning confocal microscopes provide resolution and optical sectioning to observe nuclear and cellular detail in human tissues, and are being translated for clinical applications. While traditional point-scanning is truly confocal and offers the best possible optical sectioning and resolution, line-scanning is partially confocal but may offer a relatively simpler and lower-cost alternative for more widespread dissemination into clinical settings. The loss of sectioning and loss of contrast due to scattering in tissue is more rapid and more severe with a line-scan than with a point-scan. However, the sectioning and contrast may be recovered with the use of a divided-pupil. Thus, as part of our efforts to translate confocal microscopy for detection of skin cancer, and to determine the best possible approach for clinical applications, we are now developing a quantitative understanding of imaging performance for a set of scanning and pupil conditions. We report a Fourier-analysis-based computational model of confocal microscopy for six configurations. The six configurations are point-scanning and line-scanning, with full-pupil, half-pupil and divided-pupils. The performance, in terms of on-axis irradiance (signal), resolution and sectioning capabilities, is quantified and compared among these six configurations.
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Affiliation(s)
- Yogesh G. Patel
- Electrical & Computer Engineering Department, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA
| | - Milind Rajadhyaksha
- Dermatology Services, Department of Medicine, Memorial Sloan-Kettering Cancer Center, 160 East 53rd Street, New York, New York 10010, USA
| | - Charles A. DiMarzio
- Electrical & Computer Engineering Department, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA
- Mechanical & Industrial Engineering Department, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115, USA
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16
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Larson B, Abeytunge S, Rajadhyaksha M. Performance of full-pupil line-scanning reflectance confocal microscopy in human skin and oral mucosa in vivo. BIOMEDICAL OPTICS EXPRESS 2011; 2:2055-67. [PMID: 21750780 PMCID: PMC3130589 DOI: 10.1364/boe.2.002055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 06/14/2011] [Accepted: 06/21/2011] [Indexed: 05/06/2023]
Abstract
Point-scanning reflectance confocal microscopes continue to be successfully translated for detection of skin cancer. Line-scanning, with the use of a single scanner and a linear-array detector, offers a potentially smaller, simpler and lower cost alternative approach, to accelerate widespread dissemination into the clinic. However, translation will require an understanding of imaging performance deep within scattering and aberrating human tissues. We report the results of an investigation of the performance of a full-pupil line-scanning reflectance confocal microscope in human skin and oral mucosa, in terms of resolution, optical sectioning, contrast, signal-to-noise ratio, imaging and the effect of speckle noise.
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Affiliation(s)
- Bjorg Larson
- Department of Dermatology, Memorial Sloan Kettering Cancer Center, 160 E. 53rd St., New York, NY 10022, USA
| | - Sanjeewa Abeytunge
- Research Engineering Laboratory, Memorial Sloan Kettering Cancer Center, 400 E 67th St., New York, NY 10065, USA
| | - Milind Rajadhyaksha
- Department of Dermatology, Memorial Sloan Kettering Cancer Center, 160 E. 53rd St., New York, NY 10022, USA
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17
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Abstract
Optical contrast based on elastic scattering interactions between light and matter can be used to probe cellular structure, cellular dynamics, and image tissue architecture. The quantitative nature and high sensitivity of light scattering signals to subtle alterations in tissue morphology, as well as the ability to visualize unstained tissue in vivo, has recently generated significant interest in optical-scatter-based biosensing and imaging. Here we review the fundamental methodologies used to acquire and interpret optical scatter data. We report on recent findings in this field and present current advances in optical scatter techniques and computational methods. Cellular and tissue data enabled by current advances in optical scatter spectroscopy and imaging stand to impact a variety of biomedical applications including clinical tissue diagnosis, in vivo imaging, drug discovery, and basic cell biology.
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Affiliation(s)
- Nada N. Boustany
- Corresponding Author: Rutgers University, Dept. of Biomedical Engineering, 599 Taylor Road, Piscataway, NJ 08854, Tel: (732) 445-4500 x6320,
| | - Stephen A. Boppart
- University of Illinois Urbana-Champaign, Depts. of Electrical and Computer Engineering, Bioengineering, Medicine, Beckman Institute for Advanced Science and Technology, 405 N. Mathews Avenue, Urbana, IL 61801, Tel: (217) 244-7479
| | - Vadim Backman
- Northwestern University, McCormick School of Engineering and Applied Sciences, Department of Biomedical Engineering, 2145 Sheridan Road, Evanston IL 60208, Tel: (847) 491-3536
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