Hyperpolarized 13C Spectroscopy with Simple Slice-and-Frequency-Selective Excitation
نویسندگان
چکیده
منابع مشابه
Simultaneous Multi-slice Imaging of Multiple Metabolites Using Spectral-spatial Excitation for Hyperpolarized 13c Experiments
Figure 4. Images reconstructed from retrospectively undersampled in vivo C data in the porcine heart. The pyruvate image from the 4 frame, which contained signal in both left and right ventricles, was used as reference data for SMS reconstruction. The time-resolved scan consists of 10 pyruvate frames to capture the first pass of the bolus, followed by 1 frame to image myocardial bicarbonate. Im...
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BACKGROUND A velocity-selective binomial excitation scheme for myocardial first-pass perfusion measurements with hyperpolarized 13C substrates, which preserves bolus magnetization inside the blood pool, is presented. The proposed method is evaluated against gadolinium-enhanced 1H measurements in-vivo. METHODS The proposed excitation with an echo-planar imaging readout was implemented on a cli...
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Hyperpolarized 13C offers high signal-to-noise ratios for imaging metabolic activity in vivo, but care must be taken when designing pulse sequences because the magnetization cannot be recovered once it has decayed. It has a short lifetime, on the order of minutes, and gets used up by each RF excitation. In this paper, we present a new dynamic chemical-shift imaging method that uses specialized ...
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Slice-selective adiabatic pulses are mostly confined to spin inversion and refocusing pulses. Here composite slice-selective 90" excitation pulses capable of multi-slice applications are proposed. This new class of pulses are based on halved adiabatic MIP pulses with each segment of the halved MIP pulses replaced by a small flip angle slice-selective plane rotation pulse such as a hamming-filte...
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ژورنال
عنوان ژورنال: Biomedicines
سال: 2021
ISSN: 2227-9059
DOI: 10.3390/biomedicines9020121