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- W2945126548 abstract "Hyperpolarized <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>129</sup> Xe magnetic resonance imaging is a powerful modality capable of assessing lung structure and function. While it has shown promise as a clinical tool for the longitudinal assessment of lung function, its utility as an investigative tool for animal models of pulmonary diseases is limited by the necessity of invasive intubation and mechanical ventilation procedures. In this paper, we overcame this limitation by developing a gas delivery system and implementing a set of imaging schemes to acquire high-resolution gas- and dissolved-phase images in free-breathing mice. Gradient echo pulse sequences were used to acquire both high- and low-resolution gas-phase images, and regional fractional ventilation was quantified by comparing signal buildup among low-resolution gas-phase images acquired at two flip-angles. Dissolved-phase images were acquired using both ultra-short echo time and chemical shift imaging sequences with discrete sets of flip-angle/repetition time combinations to visualize gas uptake and distribution throughout the body. Spectral features distinct to various anatomical regions were identified in images acquired using the latter sequence and were used for the quantification of gas arrival times for respective compartments." @default.
- W2945126548 created "2019-05-29" @default.
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- W2945126548 date "2019-09-01" @default.
- W2945126548 modified "2023-10-10" @default.
- W2945126548 title "Quantification of Ventilation and Gas Uptake in Free-Breathing Mice With Hyperpolarized<sup>129</sup>Xe MRI" @default.
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- W2945126548 doi "https://doi.org/10.1109/tmi.2019.2911293" @default.
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