1
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Paul R, Murali K, Varma HM. High-density diffuse correlation tomography with enhanced depth localization and minimal surface artefacts. BIOMEDICAL OPTICS EXPRESS 2022; 13:6081-6099. [PMID: 36733746 PMCID: PMC9872877 DOI: 10.1364/boe.469405] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 09/14/2022] [Accepted: 09/21/2022] [Indexed: 05/08/2023]
Abstract
A spatially weighted filter applied to both the measurement and the Jacobian is proposed for high-density diffuse correlation tomography (DCT) to remove unwanted extracerebral interferences and artefacts along with better depth localization in the reconstructed blood flow images. High-density DCT is implemented by appropriate modification of recently introduced Multi-speckle Diffuse Correlation Spectroscopy (M-DCS) system. Additionally, we have used autocorrelation measurements at multiple delay-times in an iterative manner to improve the reconstruction results. The proposed scheme has been validated by simulations, phantom experiments and in-vivo human experiments.
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Affiliation(s)
- Ria Paul
- Indian Institute of Technology Bombay (IITB), Mumbai-400076, India
| | - K. Murali
- Indian Institute of Technology Bombay (IITB), Mumbai-400076, India
| | - Hari M. Varma
- Indian Institute of Technology Bombay (IITB), Mumbai-400076, India
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2
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Majeski JB, Dar IA, Choe R. Co-registered speckle contrast optical tomography and frequency domain-diffuse optical tomography for imaging of the fifth metatarsal. BIOMEDICAL OPTICS EXPRESS 2022; 13:5358-5376. [PMID: 36425631 PMCID: PMC9664877 DOI: 10.1364/boe.467863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 05/11/2023]
Abstract
A co-registered speckle contrast optical tomography and frequency domain-diffuse optical tomography system has been designed for imaging total hemoglobin concentration, blood oxygenation, and blood flow with the future aim of monitoring Jones fractures of the fifth metatarsal. Experimental validation was performed using both in vitro tissue-mimicking phantoms and in vivo cuff occlusion experiments. Results of these tissue phantom experiments ensure accurate recovery of three-dimensional distributions of optical properties and flow. Finally, cuff occlusion experiments performed on one healthy human subject demonstrate the system's ability to recover both decreasing tissue oxygenation and blood flow as caused by an arterial occlusion.
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Affiliation(s)
- Joseph B. Majeski
- Department of Biomedical Engineering,
University of Rochester, Rochester, New York 14620, USA
| | - Irfaan A. Dar
- Department of Biomedical Engineering,
University of Rochester, Rochester, New York 14620, USA
| | - Regine Choe
- Department of Biomedical Engineering,
University of Rochester, Rochester, New York 14620, USA
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14620, USA
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3
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Feng S, Gui Z, Zhang X, Shang Y. Collimating micro-lens fiber array for noncontact near-infrared diffuse correlation tomography. BIOMEDICAL OPTICS EXPRESS 2021; 12:1467-1481. [PMID: 33796366 PMCID: PMC7984780 DOI: 10.1364/boe.413734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 02/06/2021] [Accepted: 02/06/2021] [Indexed: 06/01/2023]
Abstract
Near-infrared diffuse correlation spectroscopy/tomography (DCS/DCT) has recently emerged as a noninvasive measurement/imaging technology for tissue blood flow. In DCT studies, the high-dense collection of light temporal autocorrelation curves (g 2(τ)) via fiber array are critical for image reconstruction of blood flow. Previously, the camera-based fiber array limits the field of view (FOV), precluding its applications on large-size human tissues. The line-shape fiber probe based on lens combination, which is predominantly used in current DCT studies, requires rotated-scanning over the surface of target tissue, substantially prolonging the measurement time and increasing the system instability. In this study, we design a noncontact optical probe for DCT based on collimating micro-lens fiber array, termed as FA-nc-DCT system. For each source/detector fiber, a single optical path was collimated by coupling with one micro-lens in the fiber array that is integrated in a square-shape base. Additionally, an 8×8 optical switch is used to share the hardware laser and detectors without spatial scanning. The FA-nc approach for the precise collection of g 2(τ) curves was validated through a speed-varied phantom experiment and the human experiments of cuff occlusion, from which the expected value of the blood flow index (BFI) was obtained. Furthermore, the flow anomaly in the phantom and the ischemic muscle in human were accurately reconstructed from the FA-nc-DCT system, which is combined with the imaging framework based on the Nth-order linear algorithm that we recently created. Those outcomes demonstrated the great potential of FA-nc-DCT technology for fast and robust imaging of various diseases such as human breast cancers.
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4
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Ren J, Han S, Proctor AR, Desa DE, Ramirez GA, Ching-Roa VRD, Majeski JB, Dar IA, Barber NE, Forti AM, Benoit DSW, Choe R. Longitudinal 3D Blood Flow Distribution Provided by Diffuse Correlation Tomography during Bone Healing in a Murine Fracture Model. Photochem Photobiol 2020; 96:380-387. [PMID: 31883385 DOI: 10.1111/php.13201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 11/20/2019] [Indexed: 12/19/2022]
Abstract
Noninvasive monitoring of vascularization can potentially diagnose impaired bone healing earlier than current radiographic methods. In this study, a noncontact diffuse correlation tomography (DCT) technique was employed to measure longitudinal blood flow changes during bone healing in a murine femoral fracture model. The three-dimensional distribution of the relative blood flow was quantified from one day pre-fracture to 48 days post-fracture. For three mice, frequent DCT measurements were performed every other day for one week after fracture, and then weekly thereafter. A decrease in blood flow was observed in the bone fracture region at one day post-fracture, followed by a monotonic increase in blood flow beyond the pre-injury baseline until five to seven days post-fracture. For the remaining 12 mice, only weekly DCT measurements were performed. Data collected on a weekly basis show the blood flow for most mice was elevated above baseline during the first two post-fracture weeks, followed by a subsequent decrease. Torsional strength of the excised femurs was measured for all 15 mice after 7 weeks of healing. A metric based on the early blood flow changes shows a statistically significant difference between the high strength group and the low strength group.
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Affiliation(s)
- Jingxuan Ren
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Songfeng Han
- Institute of Optics, University of Rochester, Rochester, NY
| | - Ashley R Proctor
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Danielle E Desa
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Gabriel A Ramirez
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | | | - Joseph B Majeski
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Irfaan A Dar
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Nathaniel E Barber
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Amanda M Forti
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, NY.,Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester, Rochester, NY.,Department of Chemical Engineering, University of Rochester, Rochester, NY.,Department of Biomedical Genetics and Center for Oral Biology, University of Rochester, Rochester, NY.,Materials Science Program, University of Rochester, Rochester, NY
| | - Regine Choe
- Department of Biomedical Engineering, University of Rochester, Rochester, NY.,Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY
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5
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Lee K. Diffuse Speckle Contrast Analysis (DSCA) for Deep Tissue Blood Flow Monitoring. ADVANCED BIOMEDICAL ENGINEERING 2020. [DOI: 10.14326/abe.9.21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Kijoon Lee
- College of Transdisciplinary Studies, Daegu-Gyeongbuk Institute of Science and Technology (DGIST)
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6
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Sathialingam E, Lee SY, Sanders B, Park J, McCracken CE, Bryan L, Buckley EM. Small separation diffuse correlation spectroscopy for measurement of cerebral blood flow in rodents. BIOMEDICAL OPTICS EXPRESS 2018; 9:5719-5734. [PMID: 30460158 PMCID: PMC6238900 DOI: 10.1364/boe.9.005719] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 05/11/2023]
Abstract
Diffuse correlation spectroscopy (DCS) has shown promise as a means to non-invasively measure cerebral blood flow in small animal models. Here, we characterize the validity of DCS at small source-detector reflectance separations needed for small animal measurements. Through Monte Carlo simulations and liquid phantom experiments, we show that DCS error increases as separation decreases, although error remains below 12% for separations > 0.2 cm. In mice, DCS measures of cerebral blood flow have excellent intra-user repeatability and strongly correlate with MRI measures of blood flow (R = 0.74, p<0.01). These results are generalizable to other DCS applications wherein short-separation reflectance geometries are desired.
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Affiliation(s)
- Eashani Sathialingam
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr. NE, Atlanta, GA 30322, USA
- co-first authorship
| | - Seung Yup Lee
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr. NE, Atlanta, GA 30322, USA
- co-first authorship
| | - Bharat Sanders
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr. NE, Atlanta, GA 30322, USA
| | - Jaekeun Park
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr. NE, Atlanta, GA 30322, USA
| | - Courtney E. McCracken
- Department of Pediatrics, School of Medicine, Emory University, 2015 Uppergate Dr., Atlanta, GA 30322, USA
| | - Leah Bryan
- Department of Pediatrics, School of Medicine, Emory University, 2015 Uppergate Dr., Atlanta, GA 30322, USA
| | - Erin M. Buckley
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 1760 Haygood Dr. NE, Atlanta, GA 30322, USA
- Department of Pediatrics, School of Medicine, Emory University, 2015 Uppergate Dr., Atlanta, GA 30322, USA
- Children’s Research Scholar, Children’s Healthcare of Atlanta, 2015 Uppergate Dr., Atlanta, GA 30322, USA
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7
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Han S, Proctor AR, Ren J, Benoit DSW, Choe R. Temporal blood flow changes measured by diffuse correlation tomography predict murine femoral graft healing. PLoS One 2018; 13:e0197031. [PMID: 29813078 PMCID: PMC5973582 DOI: 10.1371/journal.pone.0197031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 04/25/2018] [Indexed: 12/18/2022] Open
Abstract
Blood flow changes during bone graft healing have the potential to provide important information about graft success, as the nutrients, oxygen, circulating cells and growth factors essential for integration are delivered by blood. However, longitudinal monitoring of blood flow changes during graft healing has been a challenge due to limitations in current techniques. To this end, non-invasive diffuse correlation tomography (DCT) was investigated to enable longitudinal monitoring of three-dimensional blood flow changes in deep tissue. Specific to this study, longitudinal blood flow changes were utilized to predict healing outcomes of common interventions for massive bone defects using a common mouse femoral defect model. Weekly blood flow changes were non-invasively measured using a diffuse correlation tomography system for 9 weeks in three types of grafts: autografts (N = 7), allografts (N = 6) and tissue-engineered allografts (N = 6). Healing outcomes were quantified using an established torsion testing method 9 weeks after transplantation. Analysis of the spatial and temporal blood flow reveals that major differences among the three groups were captured in weeks 1-5 after graft transplantation. A multivariate model to predict maximum torque by relative blood flow changes over 5 weeks after graft transplantation was built using partial least squares regression. The results reveal lower bone strength correlates with greater cumulative blood flow over an extended period of time (i.e., 1-5 weeks). The current research demonstrates that DCT-measured blood flow changes after graft transplantation can be utilized to predict long-term healing outcomes in a mouse femoral graft model.
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Affiliation(s)
- Songfeng Han
- Institute of Optics, University of Rochester, Rochester, NY, United States of America
| | - Ashley R. Proctor
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
| | - Jingxuan Ren
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
| | - Danielle S. W. Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, United States of America
- Department of Chemical Engineering, University of Rochester, Rochester, NY, United States of America
- Department of Biomedical Genetics, University of Rochester Medical Center, Rochester, NY, United States of America
| | - Regine Choe
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States of America
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY, United States of America
- * E-mail:
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8
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Shubin AD, Felong TJ, Schutrum BE, Joe DSL, Ovitt CE, Benoit DSW. Encapsulation of primary salivary gland cells in enzymatically degradable poly(ethylene glycol) hydrogels promotes acinar cell characteristics. Acta Biomater 2017; 50:437-449. [PMID: 28039063 PMCID: PMC5455143 DOI: 10.1016/j.actbio.2016.12.049] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 12/06/2016] [Accepted: 12/23/2016] [Indexed: 01/08/2023]
Abstract
Radiation therapy for head and neck cancers leads to permanent xerostomia due to the loss of secretory acinar cells in the salivary glands. Regenerative treatments utilizing primary submandibular gland (SMG) cells show modest improvements in salivary secretory function, but there is limited evidence of salivary gland regeneration. We have recently shown that poly(ethylene glycol) (PEG) hydrogels can support the survival and proliferation of SMG cells as multicellular spheres in vitro. To further develop this approach for cell-based salivary gland regeneration, we have investigated how different modes of PEG hydrogel degradation affect the proliferation, cell-specific gene expression, and epithelial morphology within encapsulated salivary gland spheres. Comparison of non-degradable, hydrolytically-degradable, matrix metalloproteinase (MMP)-degradable, and mixed mode-degradable hydrogels showed that hydrogel degradation by any mechanism is required for significant proliferation of encapsulated cells. The expression of acinar phenotypic markers Aqp5 and Nkcc1 was increased in hydrogels that are MMP-degradable compared with other hydrogel compositions. However, expression of secretory acinar proteins Mist1 and Pip was not maintained to the same extent as phenotypic markers, suggesting changes in cell function upon encapsulation. Nevertheless, MMP- and mixed mode-degradability promoted organization of polarized cell types forming tight junctions and expression of the basement membrane proteins laminin and collagen IV within encapsulated SMG spheres. This work demonstrates that cellularly remodeled hydrogels can promote proliferation and gland-like organization by encapsulated salivary gland cells as well as maintenance of acinar cell characteristics required for regenerative approaches. Investigation is required to identify approaches to further enhance acinar secretory properties. STATEMENT OF SIGNIFICANCE Regenerative strategies to replace damaged salivary glands require the function and organization of acinar cells. Hydrogel-based approaches have shown promise to control cell function and phenotype. However, little is known about how specific parameters, such as the mechanism of hydrogel degradation (e.g., hydrolytic or enzymatic), influence the viability, proliferation, organization, and phenotype of salivary gland cells. In this work, it is shown that hydrogel-encapsulated primary salivary gland cell proliferation is dependent upon hydrogel degradation. Hydrogels crosslinked with enzymatically degradable peptides promoted the expression of critical acinar cell markers, which are typically downregulated in primary cultures. Furthermore, salivary gland cells encapsulated in enzymatically- but not hydrolytically-degradable hydrogels displayed highly organized and polarized salivary gland cell markers, which mimics characteristics found in native gland tissue. In sum, results indicate that salivary gland cells respond to cellularly remodeled hydrogels, resulting in self-assembly and organization akin to acini substructures of the salivary gland.
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Affiliation(s)
- Andrew D Shubin
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States
| | - Timothy J Felong
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States
| | - Brittany E Schutrum
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States
| | - Debria S L Joe
- Department of Biology, Xavier University of Louisiana, New Orleans, LA, United States
| | - Catherine E Ovitt
- Center for Oral Biology, University of Rochester, Rochester, NY, United States; Department of Biomedical Genetics, University of Rochester, Rochester, NY, United States.
| | - Danielle S W Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, United States; Department of Biomedical Genetics, University of Rochester, Rochester, NY, United States; Department of Chemical Engineering, University of Rochester, Rochester, NY, United States; Center for Musculoskeletal Research, University of Rochester, Rochester, NY, United States.
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9
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Konugolu Venkata Sekar S, Pagliazzi M, Negredo E, Martelli F, Farina A, Dalla Mora A, Lindner C, Farzam P, Pérez-Álvarez N, Puig J, Taroni P, Pifferi A, Durduran T. In Vivo, Non-Invasive Characterization of Human Bone by Hybrid Broadband (600-1200 nm) Diffuse Optical and Correlation Spectroscopies. PLoS One 2016; 11:e0168426. [PMID: 27997565 PMCID: PMC5172608 DOI: 10.1371/journal.pone.0168426] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Accepted: 11/30/2016] [Indexed: 11/19/2022] Open
Abstract
Non-invasive in vivo diffuse optical characterization of human bone opens a new possibility of diagnosing bone related pathologies. We present an in vivo characterization performed on seventeen healthy subjects at six different superficial bone locations: radius distal, radius proximal, ulna distal, ulna proximal, trochanter and calcaneus. A tailored diffuse optical protocol for high penetration depth combined with the rather superficial nature of considered tissues ensured the effective probing of the bone tissue. Measurements were performed using a broadband system for Time-Resolved Diffuse Optical Spectroscopy (TRS) to assess mean absorption and reduced scattering spectra in the 600-1200 nm range and Diffuse Correlation Spectroscopy (DCS) to monitor microvascular blood flow. Significant variations among tissue constituents were found between different locations; with radius distal rich of collagen, suggesting it as a prominent location for bone related measurements, and calcaneus bone having highest blood flow among the body locations being considered. By using TRS and DCS together, we are able to probe the perfusion and oxygen consumption of the tissue without any contrast agents. Therefore, we predict that these methods will be able to evaluate the impairment of the oxygen metabolism of the bone at the point-of-care.
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Affiliation(s)
| | - Marco Pagliazzi
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Eugènia Negredo
- Lluita contra la Sida Foundation, Germans Trias i Pujol University Hospital, Badalona, Spain. Universitat Autònoma de Barcelona, Barcelona, Spain
- Universitat de Vic-Universitat Central de Catalunya, Vic, Barcelona, Spain
| | - Fabrizio Martelli
- Dipartimento di Fisica e Astronomia, Università degli Studi di Firenze, Sesto Fiorentino, Firenze, Italy
| | - Andrea Farina
- Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
- Consiglio Nazionale delle Ricerche - Istituto di Fotonica e Nanotecnologie, Milano, Italy
| | | | - Claus Lindner
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Parisa Farzam
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
| | - Núria Pérez-Álvarez
- Lluita contra la Sida Foundation, Germans Trias i Pujol University Hospital, Badalona, Spain. Universitat Autònoma de Barcelona, Barcelona, Spain
- Statistics and Operations Research Department, Universitat Politècnica de Catalunya, Barcelona, Spain
| | - Jordi Puig
- Lluita contra la Sida Foundation, Germans Trias i Pujol University Hospital, Badalona, Spain. Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Paola Taroni
- Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
| | - Antonio Pifferi
- Dipartimento di Fisica, Politecnico di Milano, Milano, Italy
| | - Turgut Durduran
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
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10
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Ramirez G, Proctor AR, Jung KW, Wu TT, Han S, Adams RR, Ren J, Byun DK, Madden KS, Brown EB, Foster TH, Farzam P, Durduran T, Choe R. Chemotherapeutic drug-specific alteration of microvascular blood flow in murine breast cancer as measured by diffuse correlation spectroscopy. BIOMEDICAL OPTICS EXPRESS 2016; 7:3610-3630. [PMID: 27699124 PMCID: PMC5030036 DOI: 10.1364/boe.7.003610] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/16/2016] [Accepted: 08/17/2016] [Indexed: 05/08/2023]
Abstract
The non-invasive, in vivo measurement of microvascular blood flow has the potential to enhance breast cancer therapy monitoring. Here, longitudinal blood flow of 4T1 murine breast cancer (N=125) under chemotherapy was quantified with diffuse correlation spectroscopy based on layer models. Six different treatment regimens involving doxorubicin, cyclophosphamide, and paclitaxel at clinically relevant doses were investigated. Treatments with cyclophosphamide increased blood flow as early as 3 days after administration, whereas paclitaxel induced a transient blood flow decrease at 1 day after administration. Early blood flow changes correlated strongly with the treatment outcome and distinguished treated from untreated mice individually for effective treatments.
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Affiliation(s)
- Gabriel Ramirez
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Ashley R. Proctor
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Ki Won Jung
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Tong Tong Wu
- Department of Biostatistics and Computational Biology, University of Rochester Medical Center, Rochester, NY 14642,
USA
| | - Songfeng Han
- The Institute of Optics, University of Rochester, Rochester, NY 14627,
USA
| | - Russell R. Adams
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Jingxuan Ren
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Daniel K. Byun
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Kelley S. Madden
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Edward B. Brown
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
| | - Thomas H. Foster
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
- The Institute of Optics, University of Rochester, Rochester, NY 14627,
USA
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY 14642,
USA
| | - Parisa Farzam
- ICFO- Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona),
Spain
| | - Turgut Durduran
- ICFO- Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona),
Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08015 Barcelona,
Spain
| | - Regine Choe
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627,
USA
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY 14627,
USA
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11
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Han S, Proctor AR, Vella JB, Benoit DSW, Choe R. Non-invasive diffuse correlation tomography reveals spatial and temporal blood flow differences in murine bone grafting approaches. BIOMEDICAL OPTICS EXPRESS 2016; 7:3262-3279. [PMID: 27699097 PMCID: PMC5030009 DOI: 10.1364/boe.7.003262] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/30/2016] [Accepted: 07/31/2016] [Indexed: 05/16/2023]
Abstract
Longitudinal blood flow during murine bone graft healing was monitored non-invasively using diffuse correlation tomography. The system utilized spatially dense data from a scanning set-up, non-linear reconstruction, and micro-CT anatomical information. Weekly in vivo measurements were performed. Blood flow changes in autografts, which heal successfully, were localized to graft regions and consistent across mice. Poor healing allografts showed heterogeneous blood flow elevation and high inter-subject variabilities. Allografts with tissue-engineered periosteum showed responses intermediate to both autografts and allografts, consistent with healing observed. These findings suggest that spatiotemporal blood flow changes can be utilized to differentiate the degree of bone graft healing.
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Affiliation(s)
- Songfeng Han
- Institute of Optics, University of Rochester, Rochester, NY 14627, USA
| | - Ashley R. Proctor
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627, USA
| | - Joseph B. Vella
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627, USA
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY 14642, USA
- Department of Otolaryngology-Head and Neck Surgery, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Danielle S. W. Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627, USA
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY 14642, USA
- Department of Chemical Engineering, University of Rochester, Rochester, NY 14627, USA
- Department of Biomedical Genetics, University of Rochester Medical Center, Rochester, NY 14642, USA
| | - Regine Choe
- Department of Biomedical Engineering, University of Rochester, Rochester, NY 14627, USA
- Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY 14627, USA
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12
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Johansson JD, Mireles M, Morales-Dalmau J, Farzam P, Martínez-Lozano M, Casanovas O, Durduran T. Scanning, non-contact, hybrid broadband diffuse optical spectroscopy and diffuse correlation spectroscopy system. BIOMEDICAL OPTICS EXPRESS 2016; 7:481-98. [PMID: 26977357 PMCID: PMC4771466 DOI: 10.1364/boe.7.000481] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 12/19/2015] [Accepted: 01/13/2016] [Indexed: 05/24/2023]
Abstract
A scanning system for small animal imaging using non-contact, hybrid broadband diffuse optical spectroscopy (ncDOS) and diffuse correlation spectroscopy (ncDCS) is presented. The ncDOS uses a two-dimensional spectrophotometer retrieving broadband (610-900 nm) spectral information from up to fifty-seven source-detector distances between 2 and 5 mm. The ncDCS data is simultaneously acquired from four source-detector pairs. The sample is scanned in two dimensions while tracking variations in height. The system has been validated with liquid phantoms, demonstrated in vivo on a human fingertip during an arm cuff occlusion and on a group of mice with xenoimplanted renal cell carcinoma.
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Affiliation(s)
- Johannes D. Johansson
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Sciences and Technology, 08860, Castelldefels (Barcelona), Spain
| | - Miguel Mireles
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Sciences and Technology, 08860, Castelldefels (Barcelona), Spain
| | - Jordi Morales-Dalmau
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Sciences and Technology, 08860, Castelldefels (Barcelona), Spain
| | - Parisa Farzam
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Sciences and Technology, 08860, Castelldefels (Barcelona), Spain
| | - Mar Martínez-Lozano
- Program Against Cancer Therapeutic Resistance (ProCURE), Catalan Institute of Oncology, Bellvitge Biomedical Research Institute–IDIBELL, 08908, L’Hospitalet de Llobregat (Barcelona), Spain
| | - Oriol Casanovas
- Program Against Cancer Therapeutic Resistance (ProCURE), Catalan Institute of Oncology, Bellvitge Biomedical Research Institute–IDIBELL, 08908, L’Hospitalet de Llobregat (Barcelona), Spain
| | - Turgut Durduran
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Sciences and Technology, 08860, Castelldefels (Barcelona), Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08015 Barcelona, Spain
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Han S, Hoffman MD, Proctor AR, Vella JB, Mannoh EA, Barber NE, Kim HJ, Jung KW, Benoit DSW, Choe R. Non-Invasive Monitoring of Temporal and Spatial Blood Flow during Bone Graft Healing Using Diffuse Correlation Spectroscopy. PLoS One 2015; 10:e0143891. [PMID: 26625352 PMCID: PMC4666601 DOI: 10.1371/journal.pone.0143891] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 11/10/2015] [Indexed: 01/15/2023] Open
Abstract
Vascular infiltration and associated alterations in microvascular blood flow are critical for complete bone graft healing. Therefore, real-time, longitudinal measurement of blood flow has the potential to successfully predict graft healing outcomes. Herein, we non-invasively measure longitudinal blood flow changes in bone autografts and allografts using diffuse correlation spectroscopy in a murine femoral segmental defect model. Blood flow was measured at several positions proximal and distal to the graft site before implantation and every week post-implantation for a total of 9 weeks (autograft n = 7 and allograft n = 10). Measurements of the ipsilateral leg with the graft were compared with those of the intact contralateral control leg. Both autografts and allografts exhibited an initial increase in blood flow followed by a gradual return to baseline levels. Blood flow elevation lasted up to 2 weeks in autografts, but this duration varied from 2 to 6 weeks in allografts depending on the spatial location of the measurement. Intact contralateral control leg blood flow remained at baseline levels throughout the 9 weeks in the autograft group; however, in the allograft group, blood flow followed a similar trend to the graft leg. Blood flow difference between the graft and contralateral legs (ΔrBF), a parameter defined to estimate graft-specific changes, was elevated at 1–2 weeks for the autograft group, and at 2–4 weeks for the allograft group at the proximal and the central locations. However, distal to the graft, the allograft group exhibited significantly greater ΔrBF than the autograft group at 3 weeks post-surgery (p < 0.05). These spatial and temporal differences in blood flow supports established trends of delayed healing in allografts versus autografts.
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Affiliation(s)
- Songfeng Han
- Institute of Optics, University of Rochester, Rochester, New York, United States of America
| | - Michael D. Hoffman
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Ashley R. Proctor
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
| | - Joseph B. Vella
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, United States of America
- Department of Otolaryngology-Head and Neck Surgery, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Emmanuel A. Mannoh
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
| | - Nathaniel E. Barber
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
| | - Hyun Jin Kim
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
| | - Ki Won Jung
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
| | - Danielle S. W. Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
- Department of Orthopaedics and Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, New York, United States of America
- Department of Chemical Engineering, University of Rochester, Rochester, New York, United States of America
- Department of Biomedical Genetics, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Regine Choe
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, United States of America
- Department of Electrical and Computer Engineering, University of Rochester, New York, United States of America
- * E-mail:
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