What does this research mean for the field?

Multifrequency magnetic resonance elastography can directly quantify abdominal aortic wall stiffness, revealing higher stiffness in supraceliac compared to infrarenal segments and sensitivity to patient posture and hemodynamics. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To assess the feasibility of multifrequency magnetic resonance elastography for directly quantifying abdominal aortic wall stiffness and determining its sensitivity to anatomical segment, body position, and hemodynamics.

September 18, 2026NMR in BiomedicineOpen Access

Multifrequency Magnetic Resonance Elastography of the Abdominal Aortic Wall: Segmental, Positional and Flow Effects

Q: What are the key findings of this study?

Abdominal aortic magnetic resonance elastography demonstrated that mean wall shear wave speed was significantly higher in supraceliac than infrarenal segments in the supine position (1.47 vs. 1.39 m/s, p=0.035).

Q: What is the clinical evidence from this study?

Study design: Cross-Sectional. Population: Healthy volunteers (n=11). Intervention: Abdominal aortic magnetic resonance elastography (MRE) vs. Infrarenal segment / Prone position. Primary outcome: Mean wall shear wave speed (SWS) in the supraceliac vs infrarenal segments in the supine position (p=0.035).

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Key result

Aortic MRE links supraceliac segments to higher stiffness vs. infrarenal aorta at ~1.47 m/s.

P=0.035
n=11

Population

11 healthy adult male volunteers with no history of cardiovascular disease, median age 29, mean BMI 23.0…

Design

Cross-sectional

Authors

YWYu Chien WuDigital China Health (China)YWYikun WangOnline Technologies (United States)JSJakob SchattenfrohHumboldt-Universität zu Berlin

Discussion

Member takes

Implication

May inform noninvasive aortic stiffness assessment; leaves open clinical utility pending validation in larger diseased cohorts.

Key Points

To assess the feasibility of multifrequency magnetic resonance elastography for directly quantifying abdominal aortic wall stiffness and determining its sensitivity to anatomical segment, body position, and hemodynamics.
Prospective study of 11 healthy young male volunteers (median age 30 years) scanned in both supine and prone positions.
Acquired 3D wavefields at 70, 80, and 90 Hz with ECG trigger delays to suppress luminal blood signal, reconstructing shear wave speed (SWS) at supraceliac (SC) and infrarenal (IR) segments.
Coupled elastography with flow-velocity MRI to assess hemodynamic parameters, testing measurement repeatability across 12 paired acquisitions in six volunteers.
Mean wall SWS was higher in SC than IR segments in both supine (1.47 ± 0.07 vs. 1.39 ± 0.13 m/s, p = 0.035) and prone positions (1.40 ± 0.09 vs. 1.33 ± 0.10 m/s, p = 0.046), with higher stiffness in supine SC segments (p = 0.019) and good scan repeatability (ICC = 0.76).
Peak blood velocity and peak flow were significantly higher in SC than IR segments (all p < 0.001), with prone peak velocity correlating negatively with aortic wall stiffness (SC: r = −0.75, p = 0.008; IR: r = −0.69, p = 0.019).

Study Design

Type

Cross-Sectional (n=11)

Multicenter

Structured PICO

Population

11 healthy young male volunteers without cardiovascular risk factors underwent abdominal aortic magnetic resonance elastography to evaluate wall stiffness across different segments and positions.

Exposure

Multifrequency magnetic resonance elastography (MRE) of the abdominal aortic wall (supraceliac and infrarenal segments) performed in both supine and prone positions.

Outcome

Feasibility of abdominal aortic MRE for direct assessment of wall stiffness (shear wave speed) and its dependence on segmental region, patient position, and hemodynamic parameters.surrogate

Main Result

Absolute Event Rate: 1.47% vs 1.39%

p-value: p=0.035

Abdominal aortic MRE is feasible for directly depicting wall stiffness with minimal blood contribution, revealing that segment-specific stiffness is sensitive to circulatory loading and patient position.

Limitations

Small cohort consisting exclusively of healthy young male volunteers, which limits the generalizability of the findings.
Complex imaging protocol requiring trigger delay selection based on a series of scout images.
Images of the infrarenal segment were more susceptible to motion artifacts and B0 inhomogeneity due to bowel peristalsis and intestinal filling status.
Limited spatial resolution of MRE prevents complete elimination of partial volume effects.
Small sample size of only healthy young males
Relationship between MRE-derived stiffness and hemodynamic variability requires further investigation through dedicated phantom studies and carefully controlled in vivo experiments

Cite This Study

Wu et al. (2026) conducted a cross-sectional in Healthy volunteers (n=11). Abdominal aortic magnetic resonance elastography (MRE) vs. Infrarenal segment / Prone position was evaluated on Mean wall shear wave speed (SWS) in the supraceliac vs infrarenal segments in the supine position (p=0.035). Abdominal aortic magnetic resonance elastography demonstrated that mean wall shear wave speed was significantly higher in supraceliac than infrarenal segments in the supine position (1.47 vs. 1.39 m/s, p=0.035).

synapsesocial.com/papers/6aacf5ed0c46fbdff987dd6d https://doi.org/10.1002/nbm.70401

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Multifrequency Magnetic Resonance Elastography of the Abdominal Aortic Wall: Segmental, Positional and Flow Effects

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

Multifrequency Magnetic Resonance Elastography of the Abdominal Aortic Wall: Segmental, Positional and Flow Effects

Discussion

Member takes

Implication

Key Points

Study Design

Structured PICO

Main Result

Limitations

Cite This Study

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