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Jain P, Gupta S. Blood Flow Prediction in Multi-Exposure Speckle Contrast Imaging Using Conditional Generative Adversarial Network. Cureus 2023; 15:e37349. [PMID: 37182031 PMCID: PMC10170186 DOI: 10.7759/cureus.37349] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/05/2023] [Indexed: 05/16/2023] Open
Abstract
Purpose Blood perfusion is an important physiological parameter that can be quantitatively assessed using various imaging techniques. Blood flow prediction in laser speckle contrast imaging is important for medical diagnosis, drug development, tissue engineering, biomedical research, and continuous monitoring. Deep learning is a new and promising approach for predicting blood flow whenever the condition varies, but it comes with a high learning cost for real-world scenarios with a variable flow value derived from multi-exposure laser speckle contrast imaging (MECI) data. A generative adversarial network (GAN) is presented in this research for the reliable prediction of blood flows in diverse scenarios in MECI. Method We suggested a time-efficient approach using a low frame rate camera that can be used to predict blood flow in MECI data by using conditional GAN architecture. Our approach is implemented by extending our work to the entire flow as well as the specific region of interest (ROI) in the flow. Results Results show that conditional GAN exhibits improved generalization ability to predict blood flow in MECI when compared to classifications-based deep learning approaches with an accuracy of 98.5% with a relative mean error of 1.57% for the whole field and 7.53% for a specific ROI. Conclusion The conditional GAN is very effective in predicting blood flows in MECI, entirely or within ROI, compared with other deep learning approaches.
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Affiliation(s)
- Pankaj Jain
- Biomedical Engineering, National Institute of Technology, Raipur, IND
| | - Saurabh Gupta
- Biomedical Engineering, National Institute of Technology, Raipur, IND
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2
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HEMODYNAMICS AND TEMPERATURE OF TISSUES IN THE AREA OF UNION OF PRIMARY AND REPEATED FRACTURES OF LONG BONES DURING GROWTH (IN VIVO EXPERIMENT). TRAUMATOLOGY AND ORTHOPEDICS OF RUSSIA 2022. [DOI: 10.17816/2311-2905-1976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Relevance. Adequate blood circulation in the tissues during healing of fractures is a factor in achieving positive results in the treatment of patients. Purpose of the study. In an in vivo experiment, to study the features of the temperature response and blood circulation in the area of fusion of the primary and repeated fractures of the tibia during the growth period. Material and methods. Rats (n = 36) model a fracture of the tibia, recorded by the outer structure. In series 1, fixation continued until union. In series 2, 21 days after the operation, refracture was modeled and re-fixed until union. We studied blood circulation and tissue temperature in the projection of the fracture: in the norm; 21 and 35 days after fracture or refractory; 28 days after termination of fixation. Results. The temperature and blood circulation were of the same type, but of different severity. Three types of reaction were identified: 1) reduced blood flow velocity and tissue temperature, increased venous outflow; 2) increased blood flow velocity, unchanged venous outflow, reduced tissue temperature; 3) a slight decrease in blood flow velocity, increased venous outflow, a slight increase in tissue temperature. By the end of fixation in series 1, the parameters returned to normal. In series 2, 28 days after the termination of fixation in animals with the first and second types of hemodynamics, the temperature of tissues and venous outflow returned to normal, and the blood flow rate decreased. In the third type, the temperature of the tissues returned to normal, the venous outflow increased, and the rate of blood flow increased. Conclusion. When the primary fracture is fought, the blood circulation and tissue temperature normalized to the end of the fixation, and with refracturas a month after the termination of the fixation, the changes were preserved.
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3
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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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4
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Prediction Criteria for the Formation of Refracture after Union of a Long Bone Fracture on the Basis of Hemodynamic Changes in the Tissues of the Area of Damage. Bull Exp Biol Med 2022; 174:95-98. [PMID: 36437336 DOI: 10.1007/s10517-022-05655-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Indexed: 11/29/2022]
Abstract
We studied hemodynamic changes in the area of leg bone fracture and determined the prognostic criteria for refracture formation after achieved union. In Wistar rats (n=18), shin bone fracture with external fixation of the fragments was modeled. The union was formed 35 days after osteosynthesis, the device was removed at this term. In 5 cases, a refracture was formed after the termination of fixation. Hemodynamics and local temperature in the tissues in the area of injury were recorded before the start of the experiment and on days 21 and 35 of fixation. In rats with refracture after union, the blood circulation in the area of damage was characterized by a pronounced hypertonicity of the arteries of both large and small diameters, obstruction of venous outflow, and local hyperthermia. This hemodynamics in tissues in the area of damage can serve as an informative criterion for predicting the course of reparative osteogenesis.
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5
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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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6
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Shi H, Zhao Z, Jiang W, Zhu P, Zhou N, Huang X. A Review Into the Insights of the Role of Endothelial Progenitor Cells on Bone Biology. Front Cell Dev Biol 2022; 10:878697. [PMID: 35686054 PMCID: PMC9173585 DOI: 10.3389/fcell.2022.878697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/11/2022] [Indexed: 11/23/2022] Open
Abstract
In addition to its important transport functions, the skeletal system is involved in complex biological activities for the regulation of blood vessels. Endothelial progenitor cells (EPCs), as stem cells of endothelial cells (ECs), possess an effective proliferative capacity and a powerful angiogenic capacity prior to their differentiation. They demonstrate synergistic effects to promote bone regeneration and vascularization more effectively by co-culturing with multiple cells. EPCs demonstrate a significant therapeutic potential for the treatment of various bone diseases by secreting a combination of growth factors, regulating cellular functions, and promoting bone regeneration. In this review, we retrospect the definition and properties of EPCs, their interaction with mesenchymal stem cells, ECs, smooth muscle cells, and immune cells in bone regeneration, vascularization, and immunity, summarizing their mechanism of action and contribution to bone biology. Additionally, we generalized their role and potential mechanisms in the treatment of various bone diseases, possibly indicating their clinical application.
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Affiliation(s)
- Henglei Shi
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Disease Treatment, Guangxi Clinical Research Center for Craniofacia Reconstruction, Guangxi Key Laboratory of Oral and Maxillofacial Surg Deformity, Nanning, China
| | - Zhenchen Zhao
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Disease Treatment, Guangxi Clinical Research Center for Craniofacia Reconstruction, Guangxi Key Laboratory of Oral and Maxillofacial Surg Deformity, Nanning, China
| | - Weidong Jiang
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Disease Treatment, Guangxi Clinical Research Center for Craniofacia Reconstruction, Guangxi Key Laboratory of Oral and Maxillofacial Surg Deformity, Nanning, China
| | - Peiqi Zhu
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Disease Treatment, Guangxi Clinical Research Center for Craniofacia Reconstruction, Guangxi Key Laboratory of Oral and Maxillofacial Surg Deformity, Nanning, China
| | - Nuo Zhou
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Disease Treatment, Guangxi Clinical Research Center for Craniofacia Reconstruction, Guangxi Key Laboratory of Oral and Maxillofacial Surg Deformity, Nanning, China
| | - Xuanping Huang
- Department of Oral and Maxillofacial Surgery, Hospital of Stomatology, Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Disease Treatment, Guangxi Clinical Research Center for Craniofacia Reconstruction, Guangxi Key Laboratory of Oral and Maxillofacial Surg Deformity, Nanning, China
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7
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Leon S, Ren J, Choe R, Wu TT. Semiparametric mixed-effects model for analysis of non-invasive longitudinal hemodynamic responses during bone graft healing. PLoS One 2022; 17:e0265471. [PMID: 35381007 PMCID: PMC8982895 DOI: 10.1371/journal.pone.0265471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 03/02/2022] [Indexed: 11/18/2022] Open
Abstract
When dealing with longitudinal data, linear mixed-effects models (LMMs) are often used by researchers. However, LMMs are not always the most adequate models, especially if we expect a nonlinear relationship between the outcome and a continuous covariate. To allow for more flexibility, we propose the use of a semiparametric mixed-effects model to evaluate the overall treatment effect on the hemodynamic responses during bone graft healing and build a prediction model for the healing process. The model relies on a closed-form expectation–maximization algorithm, where the unknown nonlinear function is estimated using a Lasso-type procedure. Using this model, we were able to estimate the effect of time for individual mice in each group in a nonparametric fashion and the effect of the treatment while accounting for correlation between observations due to the repeated measurements. The treatment effect was found to be statistically significant, with the autograft group having higher total hemoglobin concentration than the allograft group.
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Affiliation(s)
- Sami Leon
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, United States of America
| | - Jingxuan Ren
- Department of Biomedical Engineering, University of Rochester, 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
| | - Tong Tong Wu
- Department of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, United States of America
- * E-mail:
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8
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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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9
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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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10
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Murali K, Nandakumaran AK, Durduran T, Varma HM. Recovery of the diffuse correlation spectroscopy data-type from speckle contrast measurements: towards low-cost, deep-tissue blood flow measurements. BIOMEDICAL OPTICS EXPRESS 2019; 10:5395-5413. [PMID: 31646054 PMCID: PMC6788603 DOI: 10.1364/boe.10.005395] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/28/2019] [Accepted: 08/28/2019] [Indexed: 05/23/2023]
Abstract
A multi-step Volterra integral equation-based algorithm was developed to measure the electric field auto-correlation function from multi-exposure speckle contrast data. This enabled us to derive an estimate of the full diffuse correlation spectroscopy data-type from a low-cost, camera-based system. This method is equally applicable for both single and multiple scattering field auto-correlation models. The feasibility of the system and method was verified using simulation studies, tissue mimicking phantoms and subsequently in in vivo experiments.
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Affiliation(s)
- K. Murali
- Department of Biosciences and Bioengineering, Indian Institute of Technology - Bombay (IITB), India
| | - A. K. Nandakumaran
- Department of Mathematics, Indian Institute of Science, Bangalore, India
| | - Turgut Durduran
- ICFO-Institut de Ciéncies Fotóniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Hari M. Varma
- Department of Biosciences and Bioengineering, Indian Institute of Technology - Bombay (IITB), India
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11
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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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12
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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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13
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Dragojević T, Varma HM, Hollmann JL, Valdes CP, Culver JP, Justicia C, Durduran T. High-density speckle contrast optical tomography (SCOT) for three dimensional tomographic imaging of the small animal brain. Neuroimage 2017; 153:283-292. [PMID: 28389382 DOI: 10.1016/j.neuroimage.2017.04.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Revised: 02/27/2017] [Accepted: 04/01/2017] [Indexed: 01/19/2023] Open
Abstract
High-density speckle contrast optical tomography (SCOT) utilizing tens of thousands of source-detector pairs, was developed for in vivo imaging of blood flow in small animals. The reduction in cerebral blood flow (CBF) due to local ischemic stroke in a mouse brain was transcanially imaged and reconstructed in three dimensions. The reconstructed volume was then compared with corresponding magnetic resonance images demonstrating that the volume of reduced CBF agrees with the infarct zone at twenty-four hours.
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Affiliation(s)
- Tanja Dragojević
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain.
| | - Hari M Varma
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Joseph L Hollmann
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Claudia P Valdes
- ICFO-Institut de Ciències Fotòniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels, Barcelona, Spain
| | - Joseph P Culver
- Department of Radiology, Washington University School of Medicine,St. Louis, MO 63110, USA; Department of Physics, Washington University, St. Louis, MO 63130, USA
| | - Carles Justicia
- Department of Brain Ischemia and Neurodegeneration, Insitut d'Investigacions Biomèdiques de Barcelona (IIBB), Consejo Superior de Investigaciones Científicas (CSIC), Barcelona, Spain; Àrea de Neurociències, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 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
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14
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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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