Mr. Yogesh Kannan Mariappan Profile

Yogesh Kannan Mariappan

Student at Mayo Clinic

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 10 May 2007 Paper

Time reversal principles for wave optimization in multiple driver magnetic resonance elastography

Yogesh Mariappan, Armando Manduca, Richard Ehman

Proceedings Volume 6511, 651119 (2007) https://doi.org/10.1117/12.710717

KEYWORDS: Transducers, Magnetic resonance elastography, Wave propagation, Acoustics, Elastography, Tissues, Phased arrays, Magnetic resonance imaging, Signal attenuation, Signal to noise ratio

Read Abstract +

Magnetic Resonance Elastography (MRE) quantitatively maps the stiffness of tissues by imaging propagating shear waves induced by mechanical transducers. It has been shown that by using multiple drivers, certain limitations of conventional single driver MRE can be reduced, and that by suitably adjusting the waveforms applied to these drivers, any arbitrary region of interest can be optimally illuminated (wave optimization). Typically these adjustments were derived from wave response data collected for each transducer individually, which increases the total scan time. To address this issue, we investigated the use of time reversal principles to calculate the appropriate waveforms and their potential advantages in MRE exams. A phased array acoustic driver system with four independent 'daughter' transducers was used. An additional shear 'parent' transducer was used to create shear waves at the ROI, and wave propagation data was collected with MRE both in continuous and transient wave mode. From these single source wave data, the appropriate phase and time offset relationships between the daughter transducers were derived. Separate experiments were then carried out driving the daughter transducers with these calculated motions, and wave optimization was achieved in both continuous and transient wave MRE. We conclude that time reversal principles could be used for wave optimization with multiple drivers and could potentially reduce the total scan time.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years