isotropic projection
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PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0245878
Author(s):  
Katsunori Suzuki ◽  
Yasuo Takehara ◽  
Mayu Sakata ◽  
Masanori Kawate ◽  
Naoki Ohishi ◽  
...  

Respiratory-gated four-dimensional phase-contrast vastly undersampled isotropic projection reconstruction (4D PC-VIPR) is magnetic resonance (MR) imaging technique that enables analysis of vascular morphology and hemodynamics in a single examination using cardiac phase resolved 3D phase-contrast magnetic resonance imaging. The present study aimed to assess the usefulness of 4D PC-VIPR for the superior mesenteric artery (SMA) flowmetry before and after flow increase was induced by the herbal medicine Daikenchuto (TJ-100) by comparing it with Doppler ultrasound (DUS) as a current standard. Twenty healthy volunteers were enrolled in this prospective single-arm study. The peak cross-sectionally averaged velocity was measured by 4D PC-VIPR, peak velocity was measured by DUS, and flow volume (FV) of SMA and aorta were measured by 4D PC-VIPR and DUS 25 min before and after the peroral administration of TJ-100. The peak cross-sectionally averaged velocity, peak velocity, and FV of SMA measured by 4D PC-VIPR and DUS significantly increased after administration of TJ-100 (4D PC-VIPR: the peak cross-sectionally averaged velocity; p = 0.004, FV; p = 0.035, DUS: the peak velocity; p = 0.003, FV; p = 0.010). Furthermore, 4D PC-VIPR can analyze multiple blood vessels simultaneously. The ratio of the SMA FV to the aorta, before and after oral administration on the 4D PC-VIPR test also increased (p = 0.015). The rate of change assessed by 4D PC-VIPR and DUS were significantly correlated (the peak cross-sectionally averaged velocity and peak velocity: r = 0.650; p = 0.005, FV: r = 0.659; p = 0.004). Retrospective 4D PC-VIPR was a useful modality for morphological and hemodynamic analysis of SMA.


2013 ◽  
Vol 15 (S1) ◽  
Author(s):  
Jianing Pang ◽  
Behzad Sharif ◽  
Reza Arsanjani ◽  
Louise E Thomson ◽  
John D Friedman ◽  
...  

Radiology ◽  
2009 ◽  
Vol 251 (1) ◽  
pp. 185-194 ◽  
Author(s):  
Richard Kijowski ◽  
Donna G. Blankenbaker ◽  
Jessica L. Klaers ◽  
Kazuhiko Shinki ◽  
Arthur A. De Smet ◽  
...  

2008 ◽  
Vol 90 (1-2) ◽  
pp. 141-155 ◽  
Author(s):  
Robert D. Knight

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