Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model

Iman Khodarahmil; Mostafa Shakeri; Melanie Kotys-Traughber; Michael K. Sharp; Amir A. Amini

doi:10.1117/12.914716

Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model

Iman Khodarahmil
, Mostafa Shakeri
, Melanie Kotys-Traughber
, Michael K. Sharp
, Amir A. Amini

Department of Radiation Oncology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

This paper describes an experimental system for validation of an approach to non-invasive determination of pressure gradients in stenotic flows as encountered in peripheral arterial disease. Pressure gradient across a Gaussian-shaped 87% area stenosis phantom was estimated by solving the pressure Poisson equation (PPE) for a steady flow mimicking the blood flow through the human iliac artery. The velocity field needed to solve the pressure equation was obtained using Phase-Contrast MRI (PC-MRI) and Stereoscopic Particle Image Velocimetry (SPIV). Steady flow rate of 46.9 ml/s was used, which corresponds to a Reynolds number of 188 and 595 at the inlet and stenosis throat, respectively (in the range of mean Reynolds number encountered, in-vivo). Results of PC-MRI and SPIV have been compared to the pressures measured directly by a pressure catheter transducer. The reconstructed pressure drop along the centerline overestimates the catheter reference pressure drop by 8.5% and 10.5% for PC-MRI and SPIV methods, respectively.

Original language	English (US)
Title of host publication	Medical Imaging 2012
Subtitle of host publication	Biomedical Applications in Molecular, Structural, and Functional Imaging
DOIs	https://doi.org/10.1117/12.914716
State	Published - 2012
Event	Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging - San Diego, CA, United States Duration: Feb 5 2012 → Feb 7 2012

Publication series

Name	Progress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume	8317
ISSN (Print)	1605-7422

Conference

Conference	Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging
Country/Territory	United States
City	San Diego, CA
Period	2/5/12 → 2/7/12

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 3 Good Health and Well-being

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Biomaterials
Radiology Nuclear Medicine and imaging

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10.1117/12.914716

Cite this

Khodarahmil, I., Shakeri, M., Kotys-Traughber, M., Sharp, M. K., & Amini, A. A. (2012). Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model. In Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging Article 83170E (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8317). https://doi.org/10.1117/12.914716

Khodarahmil, Iman ; Shakeri, Mostafa ; Kotys-Traughber, Melanie et al. / Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model. Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging. 2012. (Progress in Biomedical Optics and Imaging - Proceedings of SPIE).

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title = "Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model",

abstract = "This paper describes an experimental system for validation of an approach to non-invasive determination of pressure gradients in stenotic flows as encountered in peripheral arterial disease. Pressure gradient across a Gaussian-shaped 87\% area stenosis phantom was estimated by solving the pressure Poisson equation (PPE) for a steady flow mimicking the blood flow through the human iliac artery. The velocity field needed to solve the pressure equation was obtained using Phase-Contrast MRI (PC-MRI) and Stereoscopic Particle Image Velocimetry (SPIV). Steady flow rate of 46.9 ml/s was used, which corresponds to a Reynolds number of 188 and 595 at the inlet and stenosis throat, respectively (in the range of mean Reynolds number encountered, in-vivo). Results of PC-MRI and SPIV have been compared to the pressures measured directly by a pressure catheter transducer. The reconstructed pressure drop along the centerline overestimates the catheter reference pressure drop by 8.5\% and 10.5\% for PC-MRI and SPIV methods, respectively.",

author = "Iman Khodarahmil and Mostafa Shakeri and Melanie Kotys-Traughber and Sharp, \{Michael K.\} and Amini, \{Amir A.\}",

year = "2012",

doi = "10.1117/12.914716",

language = "English (US)",

isbn = "9780819489661",

series = "Progress in Biomedical Optics and Imaging - Proceedings of SPIE",

booktitle = "Medical Imaging 2012",

note = "Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging ; Conference date: 05-02-2012 Through 07-02-2012",

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Khodarahmil, I, Shakeri, M, Kotys-Traughber, M, Sharp, MK & Amini, AA 2012, Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model. in Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging., 83170E, Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 8317, Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging, San Diego, CA, United States, 2/5/12. https://doi.org/10.1117/12.914716

Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model. / Khodarahmil, Iman; Shakeri, Mostafa; Kotys-Traughber, Melanie et al.
Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging. 2012. 83170E (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8317).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

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AU - Khodarahmil, Iman

AU - Shakeri, Mostafa

AU - Kotys-Traughber, Melanie

AU - Sharp, Michael K.

AU - Amini, Amir A.

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N2 - This paper describes an experimental system for validation of an approach to non-invasive determination of pressure gradients in stenotic flows as encountered in peripheral arterial disease. Pressure gradient across a Gaussian-shaped 87% area stenosis phantom was estimated by solving the pressure Poisson equation (PPE) for a steady flow mimicking the blood flow through the human iliac artery. The velocity field needed to solve the pressure equation was obtained using Phase-Contrast MRI (PC-MRI) and Stereoscopic Particle Image Velocimetry (SPIV). Steady flow rate of 46.9 ml/s was used, which corresponds to a Reynolds number of 188 and 595 at the inlet and stenosis throat, respectively (in the range of mean Reynolds number encountered, in-vivo). Results of PC-MRI and SPIV have been compared to the pressures measured directly by a pressure catheter transducer. The reconstructed pressure drop along the centerline overestimates the catheter reference pressure drop by 8.5% and 10.5% for PC-MRI and SPIV methods, respectively.

AB - This paper describes an experimental system for validation of an approach to non-invasive determination of pressure gradients in stenotic flows as encountered in peripheral arterial disease. Pressure gradient across a Gaussian-shaped 87% area stenosis phantom was estimated by solving the pressure Poisson equation (PPE) for a steady flow mimicking the blood flow through the human iliac artery. The velocity field needed to solve the pressure equation was obtained using Phase-Contrast MRI (PC-MRI) and Stereoscopic Particle Image Velocimetry (SPIV). Steady flow rate of 46.9 ml/s was used, which corresponds to a Reynolds number of 188 and 595 at the inlet and stenosis throat, respectively (in the range of mean Reynolds number encountered, in-vivo). Results of PC-MRI and SPIV have been compared to the pressures measured directly by a pressure catheter transducer. The reconstructed pressure drop along the centerline overestimates the catheter reference pressure drop by 8.5% and 10.5% for PC-MRI and SPIV methods, respectively.

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T3 - Progress in Biomedical Optics and Imaging - Proceedings of SPIE

BT - Medical Imaging 2012

T2 - Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging

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Khodarahmil I, Shakeri M, Kotys-Traughber M, Sharp MK, Amini AA. Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model. In Medical Imaging 2012: Biomedical Applications in Molecular, Structural, and Functional Imaging. 2012. 83170E. (Progress in Biomedical Optics and Imaging - Proceedings of SPIE). doi: 10.1117/12.914716

Comparison of relative pressures calculated from PC-MRI and SPIV with catheter-based pressure measurements in a stenotic phantom model

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