Meeting Banner
Abstract #0459

Age-related and sex-specific reduction in cerebral arterial-venous cardiac pulse delay in functional magnetic resonance imaging

Adam M. Wright1,2, Tianyin Xu2, John Koo3, Yi Zhao3, Yunjie Tong2, and Qiuting Wen1,2
1Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN, United States, 2Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, United States, 3Department of Biostatistics and Health Data Science, Indiana University School of Medicine, Indianapolis, IN, United States

Synopsis

Keywords: Neurofluids, Velocity & Flow, arterial-venous pulse delay, vascular compliance, aging, fMRI

Motivation: Arterial-venous cardiac pulse delay is an informative marker of cerebral vascular compliance but is not easily accessible.

Goal(s): Develop an automated fMRI processing technique to extract arterial-venous pulse delay and determine its relationship with age, biological sex, and vascular health metrics.

Approach: Using fMRI’s sensitivity to blood flow changes, we calculated the cardiac pulse delay between the large cerebral arteries and the superior sagittal sinus (SSS).

Results: The fMRI-derived arterial-venous pulse delay was 77.8 ± 31.3 msec in participants aged 35-89. It decreased 3-4 msec for every decade of aging, was 10 msec faster in men than women, and increased with SSS volume.

Impact: This work introduces a novel fMRI-based measure of cerebral arterial-venous pulse delay, providing an alternative tool sensitive to changes in vascular compliance. With the widespread accessibility of fMRI, this approach has applications for researching biomechanical changes in neurological conditions.

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.

Keywords