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Kerrebijn I, Munding CE, Horner C, Atwi S, Elfarnawany M, Eibl AM, Eibl JK, Taylor JL, Kim CH, Johnson BD, Kenny JÉS. The Correlation between Carotid Artery Corrected Flow Time and Velocity Time Integral during Central Blood Volume Loss and Resuscitation. J Med Ultrasound 2023; 31:309-313. [PMID: 38264586 PMCID: PMC10802870 DOI: 10.4103/jmu.jmu_80_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/18/2023] [Accepted: 09/01/2023] [Indexed: 01/25/2024] Open
Abstract
Background Doppler ultrasound of the common carotid artery is used to infer central hemodynamics. For example, change in the common carotid artery corrected flow time (ccFT) and velocity time integral (VTI) are proposed surrogates of changing stroke volume. However, conflicting data exist which may be due to inadequate beat sample size and measurement variability - both intrinsic to handheld systems. In this brief communication, we determined the correlation between changing ccFT and carotid VTI during progressively severe central blood volume loss and resuscitation. Methods Measurements were obtained through a novel, wireless, wearable Doppler ultrasound system. Sixteen participants (ages of 18-40 years with no previous medical history) were studied across 25 lower body-negative pressure protocols. Relationships were assessed using repeated-measures correlation regression models. Results In total, 33,110 cardiac cycles comprise this analysis; repeated-measures correlation showed a strong, linear relationship between ccFT and VTI. The strength of the ccFT-VTI relationship was dependent on the number of consecutively averaged cardiac cycles (R1 cycle = 0.70, R2 cycles = 0.74, and R10 cycles = 0.81). Conclusions These results positively support future clinical investigations employing common carotid artery Doppler as a surrogate for central hemodynamics.
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Affiliation(s)
| | | | | | | | | | - Andrew M. Eibl
- Flosonics Medical, Toronto, ON, Canada
- Health Sciences North Research Institute, Sudbury, ON, Canada
| | - Joseph K. Eibl
- Flosonics Medical, Toronto, ON, Canada
- Health Sciences North Research Institute, Sudbury, ON, Canada
- Northern Ontario School of Medicine, Sudbury, ON, Canada
| | - Jenna L. Taylor
- Department of Cardiovascular Diseases, Human Integrative and Environmental Physiology Laboratory, Mayo Clinic, Rochester, MN, USA
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland, Australia
| | - Chul Ho Kim
- Department of Cardiovascular Diseases, Human Integrative and Environmental Physiology Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Bruce D. Johnson
- Department of Cardiovascular Diseases, Human Integrative and Environmental Physiology Laboratory, Mayo Clinic, Rochester, MN, USA
| | - Jon-Émile S. Kenny
- Flosonics Medical, Toronto, ON, Canada
- Health Sciences North Research Institute, Sudbury, ON, Canada
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Kenny JÉS, Gibbs SO, Eibl JK, Eibl AM, Yang Z, Johnston D, Munding CE, Elfarnawany M, Lau VC, Kemp BO, Nalla B, Atoui R. Simultaneous venous-arterial Doppler during preload augmentation: illustrating the Doppler Starling curve. Ultrasound J 2023; 15:32. [PMID: 37505318 PMCID: PMC10382420 DOI: 10.1186/s13089-023-00330-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Accepted: 07/13/2023] [Indexed: 07/29/2023] Open
Abstract
Providing intravenous (IV) fluids to a patient with signs or symptoms of hypoperfusion is common. However, evaluating the IV fluid 'dose-response' curve of the heart is elusive. Two patients were studied in the emergency department with a wireless, wearable Doppler ultrasound system. Change in the common carotid arterial and internal jugular Doppler spectrograms were simultaneously obtained as surrogates of left ventricular stroke volume (SV) and central venous pressure (CVP), respectively. Both patients initially had low CVP jugular venous Doppler spectrograms. With preload augmentation, only one patient had arterial Doppler measures indicative of significant SV augmentation (i.e., 'fluid responsive'). The other patient manifested diminishing arterial response, suggesting depressed SV (i.e., 'fluid unresponsive') with evidence of ventricular asynchrony. In this short communication, we describe how a wireless, wearable Doppler ultrasound simultaneously tracks surrogates of cardiac preload and output within a 'Doppler Starling curve' framework; implications for IV fluid dosing are discussed.
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Affiliation(s)
- Jon-Émile S Kenny
- Health Sciences North Research Institute, Sudbury, ON, Canada.
- Flosonics Medical, 325 W. Front Street, Toronto, ON, Canada.
| | | | - Joseph K Eibl
- Health Sciences North Research Institute, Sudbury, ON, Canada
- Flosonics Medical, 325 W. Front Street, Toronto, ON, Canada
- NOSM University, Sudbury, ON, Canada
| | - Andrew M Eibl
- Health Sciences North Research Institute, Sudbury, ON, Canada
- Flosonics Medical, 325 W. Front Street, Toronto, ON, Canada
| | - Zhen Yang
- Flosonics Medical, 325 W. Front Street, Toronto, ON, Canada
| | | | | | | | - Vivian C Lau
- OSF Saint Francis Medical Center, Peoria, IL, USA
| | | | - Bhanu Nalla
- Health Sciences North Research Institute, Sudbury, ON, Canada
- NOSM University, Sudbury, ON, Canada
| | - Rony Atoui
- Health Sciences North Research Institute, Sudbury, ON, Canada
- NOSM University, Sudbury, ON, Canada
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3
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Munding CE, Kenny JÉS, Yang Z, Clarke G, Elfarnawany M, Eibl AM, Eibl JK, Nalla B, Atoui R. Detecting the Change in Total Circulatory Flow with a Wireless, Wearable Doppler Ultrasound Patch: A Pilot Study. Crit Care Explor 2023; 5:e0914. [PMID: 37168690 PMCID: PMC10166367 DOI: 10.1097/cce.0000000000000914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023] Open
Abstract
Measuring fluid responsiveness is important in the management of critically ill patients, with a 10-15% change in cardiac output typically being used to indicate "fluid responsiveness." Ideally, these changes would be measured noninvasively and peripherally. The aim of this study was to determine how the common carotid artery (CCA) maximum velocity changes with total circulatory flow when confounding factors are mitigated and determine a value for CCA maximum velocity corresponding to a 10% change in total circulatory flow. DESIGN Prospective observational pilot study. SETTING Patients undergoing elective, on-pump coronary artery bypass grafting (CABG) surgery. PATIENTS Fourteen patients were referred for elective coronary artery bypass grafting surgery. INTERVENTIONS Cardiopulmonary bypass (CPB) pump flow changes during surgery, as chosen by the perfusionist. MEASUREMENTS A hands-free, wearable Doppler patch was used for CCA velocity measurements with the aim of preventing user errors in ultrasound measurements. Maximum CCA velocity was determined from the spectrogram acquired by the Doppler patch. CPB flow rates were recorded as displayed on the CPB console, and further measured from the peristaltic pulsation frequency visible on the recorded Doppler spectrograms. MAIN RESULTS Changes in CCA maximum velocity tracked well with changes in CPB flow. On average, a 13.6% change in CCA maximum velocity was found to correspond to a 10% change in CPB flow rate. CONCLUSIONS Changes in CCA velocity may be a useful surrogate for determining fluid responsiveness when user error can be mitigated.
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Affiliation(s)
| | - Jon-Émile S Kenny
- Flosonics Medical, Sudbury, ON, Canada
- Health Sciences North Research Institute, Sudbury ON, Canada
| | - Zhen Yang
- Flosonics Medical, Sudbury, ON, Canada
| | - Geoffrey Clarke
- Flosonics Medical, Sudbury, ON, Canada
- Health Sciences North Research Institute, Sudbury ON, Canada
| | | | - Andrew M Eibl
- Flosonics Medical, Sudbury, ON, Canada
- Health Sciences North Research Institute, Sudbury ON, Canada
| | - Joseph K Eibl
- Flosonics Medical, Sudbury, ON, Canada
- Health Sciences North Research Institute, Sudbury ON, Canada
- Northern Ontario School of Medicine, Sudbury ON, Canada
| | - Bhanu Nalla
- Health Sciences North Research Institute, Sudbury ON, Canada
- Northern Ontario School of Medicine, Sudbury ON, Canada
| | - Rony Atoui
- Health Sciences North Research Institute, Sudbury ON, Canada
- Northern Ontario School of Medicine, Sudbury ON, Canada
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4
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Kenny JES, Yang Z, Clarke G, Elfarnawany M, Munding CE, Eibl AM, Eibl JK, Taylor JL, Kim CH, Johnson BD. A Novel Spectral Index for Tracking Preload Change from a Wireless, Wearable Doppler Ultrasound. Diagnostics (Basel) 2023; 13:diagnostics13091590. [PMID: 37174981 PMCID: PMC10178522 DOI: 10.3390/diagnostics13091590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/21/2023] [Accepted: 04/26/2023] [Indexed: 05/15/2023] Open
Abstract
A wireless, wearable Doppler ultrasound offers a new paradigm for linking physiology to resuscitation medicine. To this end, the image analysis of simultaneously-acquired venous and arterial Doppler spectrograms attained by wearable ultrasound represents a new source of hemodynamic data. Previous investigators have reported a direct relationship between the central venous pressure (CVP) and the ratio of the internal jugular-to-common carotid artery diameters. Because Doppler power is directly related to the number of red cell scatterers within a vessel, we hypothesized that (1) the ratio of internal jugular-to-carotid artery Doppler power (V/APOWER) would be a surrogate for the ratio of the vascular areas of these two vessels and (2) the V/APOWER would track the anticipated CVP change during simulated hemorrhage and resuscitation. To illustrate this proof-of-principle, we compared the change in V/APOWER obtained via a wireless, wearable Doppler ultrasound to B-mode ultrasound images during a head-down tilt. Additionally, we elucidated the change in the V/APOWER during simulated hemorrhage and transfusion via lower body negative pressure (LBNP) and release. With these Interesting Images, we show that the Doppler V/APOWER ratio qualitatively tracks anticipated changes in CVP (e.g., cardiac preload) which is promising for both diagnosis and management of hemodynamic unrest.
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Affiliation(s)
- Jon-Emile S Kenny
- Health Sciences North Research Institute, Sudbury, ON P3E 2H3, Canada
- Flosonics Medical, Toronto, ON P3C 1R7, Canada
| | - Zhen Yang
- Flosonics Medical, Toronto, ON P3C 1R7, Canada
| | - Geoffrey Clarke
- Health Sciences North Research Institute, Sudbury, ON P3E 2H3, Canada
- Flosonics Medical, Toronto, ON P3C 1R7, Canada
| | | | | | - Andrew M Eibl
- Health Sciences North Research Institute, Sudbury, ON P3E 2H3, Canada
- Flosonics Medical, Toronto, ON P3C 1R7, Canada
| | - Joseph K Eibl
- Health Sciences North Research Institute, Sudbury, ON P3E 2H3, Canada
- Flosonics Medical, Toronto, ON P3C 1R7, Canada
- Northern Ontario School of Medicine, Sudbury, ON P3E 2C6, Canada
| | - Jenna L Taylor
- Human Integrative and Environmental Physiology Laboratory, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, USA
| | - Chul-Ho Kim
- Human Integrative and Environmental Physiology Laboratory, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, USA
| | - Bruce D Johnson
- Human Integrative and Environmental Physiology Laboratory, Department of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, USA
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Kenny JÉS, Munding CE, Eibl AM, Eibl JK. Wearable ultrasound and provocative hemodynamics: a view of the future. Crit Care 2022; 26:329. [PMID: 36284332 PMCID: PMC9597974 DOI: 10.1186/s13054-022-04206-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/28/2022] [Indexed: 11/12/2022] Open
Affiliation(s)
- Jon-Émile S. Kenny
- grid.420638.b0000 0000 9741 4533Health Sciences North Research Institute, 56 Walford Rd, Sudbury, ON P3E 2H2 Canada ,Flosonics Medical, Sudbury, ON Canada
| | | | - Andrew M. Eibl
- grid.420638.b0000 0000 9741 4533Health Sciences North Research Institute, 56 Walford Rd, Sudbury, ON P3E 2H2 Canada ,Flosonics Medical, Sudbury, ON Canada
| | - Joseph K. Eibl
- grid.420638.b0000 0000 9741 4533Health Sciences North Research Institute, 56 Walford Rd, Sudbury, ON P3E 2H2 Canada ,Flosonics Medical, Sudbury, ON Canada ,grid.436533.40000 0000 8658 0974Northern Ontario School of Medicine, Sudbury, ON Canada
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Kenny JÉS, Munding CE, Eibl JK, Eibl AM, Long BF, Boyes A, Yin J, Verrecchia P, Parrotta M, Gatzke R, Magnin PA, Burns PN, Foster FS, Demore CEM. A novel, hands-free ultrasound patch for continuous monitoring of quantitative Doppler in the carotid artery. Sci Rep 2021; 11:7780. [PMID: 33833288 PMCID: PMC8032670 DOI: 10.1038/s41598-021-87116-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 03/22/2021] [Indexed: 12/19/2022] Open
Abstract
Quantitative Doppler ultrasound of the carotid artery has been proposed as an instantaneous surrogate for monitoring rapid changes in left ventricular output. Tracking immediate changes in the arterial Doppler spectrogram has value in acute care settings such as the emergency department, operating room and critical care units. We report a novel, hands-free, continuous-wave Doppler ultrasound patch that adheres to the neck and tracks Doppler blood flow metrics in the common carotid artery using an automated algorithm. String and blood-mimicking test objects demonstrated that changes in velocity were accurately measured using both manually and automatically traced Doppler velocity waveforms. In a small usability study with 22 volunteer users (17 clinical, 5 lay), all users were able to locate the carotid Doppler signal on a volunteer subject, and, in a subsequent survey, agreed that the device was easy to use. To illustrate potential clinical applications of the device, the Doppler ultrasound patch was used on a healthy volunteer undergoing a passive leg raise (PLR) as well as on a congestive heart failure patient at resting baseline. The wearable carotid Doppler patch holds promise because of its ease-of-use, velocity measurement accuracy, and ability to continuously record Doppler spectrograms over many cardiac and respiratory cycles.
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Affiliation(s)
- Jon-Émile S Kenny
- Health Sciences North Research Institute and the Northern Ontario School of Medicine, Sudbury, ON, Canada.
- Flosonics Medical, Sudbury, ON, Canada.
| | | | - Joseph K Eibl
- Health Sciences North Research Institute and the Northern Ontario School of Medicine, Sudbury, ON, Canada
- Flosonics Medical, Sudbury, ON, Canada
| | | | - Bradley F Long
- Health Sciences North Research Institute and the Northern Ontario School of Medicine, Sudbury, ON, Canada
| | - Aaron Boyes
- Sunnybrook Research Institute, Sunnybrook Health Sciences Center, Toronto, ON, Canada
| | - Jianhua Yin
- Sunnybrook Research Institute, Sunnybrook Health Sciences Center, Toronto, ON, Canada
| | | | | | | | | | - Peter N Burns
- Sunnybrook Research Institute, Sunnybrook Health Sciences Center, Toronto, ON, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - F Stuart Foster
- Sunnybrook Research Institute, Sunnybrook Health Sciences Center, Toronto, ON, Canada
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Christine E M Demore
- Sunnybrook Research Institute, Sunnybrook Health Sciences Center, Toronto, ON, Canada.
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
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7
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Munding CE, Chérin E, Alves N, Goertz DE, Courtney BK, Foster FS. 30/80 MHz Bidirectional Dual-Frequency IVUS Feasibility Evaluated In Vivo and for Stent Imaging. Ultrasound Med Biol 2020; 46:2104-2112. [PMID: 32473846 DOI: 10.1016/j.ultrasmedbio.2020.03.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 03/15/2020] [Accepted: 03/29/2020] [Indexed: 06/11/2023]
Abstract
Although intravascular ultrasound (IVUS) is an important tool in guiding complex coronary interventions, the resolution of existing commercial IVUS devices is considerably poorer than that of optical coherence tomography. Dual-frequency IVUS (DF IVUS), incorporating a second, higher frequency transducer, has been proposed as a possible method of overcoming this limitation. Although preliminary studies have shown that DF IVUS can produce complementary images, including large-scale morphology and high detail of superficial features, it has not yet been determined that this approach would be feasible in a more clinically relevant environment. The purpose of this study was to demonstrate the first in vivo use of a 30/80 MHz DF IVUS catheter in visualizing coronary vessels in a porcine model. In addition, two commercially available stents were studied in vitro and in vivo. Clear subjective improvement of visualization of superficial structures is demonstrated, and sufficient dynamic range is achieved to image through both the catheter sheath and blood in vivo.
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Affiliation(s)
- Chelsea E Munding
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada.
| | | | | | - David E Goertz
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada; Sunnybrook Research Institute, Toronto, ON, Canada
| | - Brian K Courtney
- Sunnybrook Research Institute, Toronto, ON, Canada; Schulich Heart Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada; Department of Medicine, University of Toronto, Toronto, ON, Canada; Conavi Medical Inc., Toronto, ON, Canada
| | - F Stuart Foster
- Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada; Sunnybrook Research Institute, Toronto, ON, Canada
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8
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Munding CE, Chérin E, Jourard I, Weyers JJ, Goertz DE, Courtney BK, Foster FS. Development of a 3 French Dual-Frequency Intravascular Ultrasound Catheter. Ultrasound Med Biol 2018; 44:251-266. [PMID: 29150363 DOI: 10.1016/j.ultrasmedbio.2017.09.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 09/13/2017] [Accepted: 09/18/2017] [Indexed: 05/25/2023]
Abstract
Coronary plaque morphology, including plaque size and fibrous cap thickness, is thought to contribute to the risk of plaque rupture and future cardiac events. Dual-frequency intravascular ultrasound has been proposed as a possible technique to visualize both large-scale features and superficial detail of coronary plaque; however, it has not been found to be feasible within the constraints of a clinically functional intravascular ultrasound catheter. In this study, we describe the design and fabrication of a dual-frequency catheter using a bidirectional transducer stack with center frequencies of approximately 30 and 80 MHz. We describe how the high-frequency transducer achieves significantly improved axial and lateral resolution (16 and 120 µm, respectively, vs. 50 and 220 µm) at the expense of penetration depth. Finally, imaging of ex vivo human coronary artery segments reveals that the catheter can provide complementary images of the deeper arterial wall and superficial plaque features.
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Affiliation(s)
- Chelsea E Munding
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.
| | | | - Isaac Jourard
- Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Jill J Weyers
- Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - David E Goertz
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Research Institute, Toronto, Ontario, Canada
| | - Brian K Courtney
- Sunnybrook Research Institute, Toronto, Ontario, Canada; Schulich Heart Centre, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada; Department of Medicine, University of Toronto, Toronto, Ontario, Canada; Conavi Medical Inc., Toronto, Ontario, Canada
| | - F Stuart Foster
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada; Sunnybrook Research Institute, Toronto, Ontario, Canada
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Castelino RF, Hynes M, Munding CE, Telenkov S, Foster FS. Combined frequency domain photoacoustic and ultrasound imaging for intravascular applications. Biomed Opt Express 2016; 7:4441-4449. [PMID: 27895986 PMCID: PMC5119586 DOI: 10.1364/boe.7.004441] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 09/27/2016] [Accepted: 09/30/2016] [Indexed: 05/07/2023]
Abstract
Intravascular photoacoustic (IVPA) imaging has the potential to characterize lipid-rich structures based on the optical absorption contrast of tissues. In this study, we explore frequency domain photoacoustics (FDPA) for intravascular applications. The system employed an intensity-modulated continuous wave (CW) laser diode, delivering 1W over an intensity modulated chirp frequency of 4-12MHz. We demonstrated the feasibility of this approach on an agar vessel phantom with graphite and lipid targets, imaged using a planar acoustic transducer co-aligned with an optical fibre, allowing for the co-registration of IVUS and FDPA images. A frequency domain correlation method was used for signal processing and image reconstruction. The graphite and lipid targets show an increase in FDPA signal as compared to the background of 21dB and 16dB, respectively. Use of compact CW laser diodes may provide a valuable alternative for the development of photoacoustic intravascular devices instead of pulsed laser systems.
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Affiliation(s)
- Robin F. Castelino
- Medical Biophysics, University of Toronto, 5 King’s College Road, Toronto, ON M5S 3G8, Canada
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| | - Michael Hynes
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| | - Chelsea E. Munding
- Medical Biophysics, University of Toronto, 5 King’s College Road, Toronto, ON M5S 3G8, Canada
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
| | - Sergey Telenkov
- PHAST Imaging, 1B Richview Road, Toronto, ON M9A 4M6, Canada
| | - F. Stuart Foster
- Medical Biophysics, University of Toronto, 5 King’s College Road, Toronto, ON M5S 3G8, Canada
- Imaging Research, Sunnybrook Research Institute, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
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Ma T, Yu M, Li J, Munding CE, Chen Z, Fei C, Shung KK, Zhou Q. Erratum: Multi-frequency intravascular ultrasound (IVUS) imaging. IEEE Trans Ultrason Ferroelectr Freq Control 2015; 62:604. [PMID: 25768827 DOI: 10.1109/tuffc.2015.007057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Li BH, Leung AS, Soong A, Munding CE, Lee H, Thind AS, Munce NR, Wright GA, Rowsell CH, Yang VX, Strauss BH, Stuart Foster F, Courtney BK. Hybrid intravascular ultrasound and optical coherence tomography catheter for imaging of coronary atherosclerosis. Catheter Cardiovasc Interv 2012; 81:494-507. [DOI: 10.1002/ccd.24295] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2011] [Accepted: 12/10/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Brian H. Li
- Sunnybrook Research Institute; Sunnybrook Health Sciences Centre; University of Toronto; Toronto; Canada
| | - Annie S.O. Leung
- Sunnybrook Research Institute; Sunnybrook Health Sciences Centre; University of Toronto; Toronto; Canada
| | | | - Chelsea E. Munding
- Sunnybrook Research Institute; Sunnybrook Health Sciences Centre; University of Toronto; Toronto; Canada
| | - Hyunggyun Lee
- Sunnybrook Research Institute; Sunnybrook Health Sciences Centre; University of Toronto; Toronto; Canada
| | | | - Nigel R. Munce
- Sunnybrook Research Institute; Sunnybrook Health Sciences Centre; University of Toronto; Toronto; Canada
| | | | | | - Victor X.D. Yang
- Department of Electrical and Computer Engineering; Ryerson University; Toronto; Ontario; Canada
| | | | - F. Stuart Foster
- Sunnybrook Research Institute; Sunnybrook Health Sciences Centre; University of Toronto; Toronto; Canada
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