Noninvasive assessment of pressure distribution and fractional flow in middle cerebral artery using microbubbles and plane wave in vitro

Copyright © 2024 Elsevier B.V. All rights reserved..

Fractional flow has been proposed for quantifying the degree of functional stenosis in cerebral arteries. Herein, subharmonic aided pressure estimation (SHAPE) combined with plane wave (PW) transmission was employed to noninvasively estimate the pressure distribution and fractional flow in the middle cerebral artery (MCA) in vitro. Consequently, the effects of incident sound pressure (peak negative pressures of 86-653 kPa), pulse repetition frequency (PRF), number of pulses, and blood flow rate on the subharmonic pressure relationship were investigated. The radio frequency data were stored and beamformed offline, and the subharmonic amplitude over a 0.4 MHz bandwidth was extracted using a 12-cycle PW at 4 MHz. The optimal incident sound pressure was 217 kPa without skull (sensitivity = 0.09 dB/mmHg; r2 = 0.997) and 410 kPa with skull (median sensitivity = 0.06 dB/mmHg; median r2 = 0.981). The optimal PRF was 500 Hz, as this value affords the highest sensitivity (0.09 dB/mmHg; r2 = 0.976) and temporal resolution. In addition, the blood flow rate exhibited a lesser effect on the subharmonic pressure relationship in our experimental setup. Using the optimized parameters, the blood pressure distribution and fractional flow (FFs) were measured. As such, the FFs value was in high agreement with the value measured using the pressure sensor (FFm). The mean ± standard deviations of the FF difference (FFm - FFs) were 0.03 ± 0.06 without skull and 0.01 ± 0.05 with skull.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:138

Enthalten in:

Ultrasonics - 138(2024) vom: 29. März, Seite 107244

Sprache:

Englisch

Beteiligte Personen:

Qiao, Xiaoyang [VerfasserIn]
Zhang, Ruiyan [VerfasserIn]
Yu, Jianjun [VerfasserIn]
Yan, Yadi [VerfasserIn]
Bouakaz, Ayache [VerfasserIn]
Su, Xiao [VerfasserIn]
Liu, Jiacheng [VerfasserIn]
Zong, Yujin [VerfasserIn]
Wan, Mingxi [VerfasserIn]

Links:

Volltext

Themen:

Contrast Media
Fractional flow
Journal Article
Middle cerebral artery pressure
Plane wave
Subharmonic aided pressure estimation
Transcranial ultrasound
Ultrasound contrast agent

Anmerkungen:

Date Completed 01.04.2024

Date Revised 01.04.2024

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.ultras.2024.107244

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM367278928