Resting-State fMRI Using Passband Balanced Steady-State Free Precession
نویسندگان
چکیده
منابع مشابه
Resting-State fMRI Using Passband Balanced Steady-State Free Precession
OBJECTIVE Resting-state functional MRI (rsfMRI) has been increasingly used for understanding brain functional architecture. To date, most rsfMRI studies have exploited blood oxygenation level-dependent (BOLD) contrast using gradient-echo (GE) echo planar imaging (EPI), which can suffer from image distortion and signal dropout due to magnetic susceptibility and inherent long echo time. In this s...
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Steady-state free precession (SSFP) is a highly-efficient MRI pulse sequence that has been a fairly recent arrival in the functional MRI realm. Several methods for using balanced SSFP to detect the BOLD signal have been proposed to date and will be discussed in this review. After a brief introduction to the general properties of SSFP, this review describes the quite different approaches of tran...
متن کاملSNR using balanced steady-state free precession (b-SSFP)
A brief overview of the signal-to-noise ratio in MR imaging; including the sources of signal and noise and their respective parameters for optimization. In particular, the balanced SSFP sequence is presented as an example of a special type of gradient-echo (GE) sequence where the dephasing due to readout gradient is exactly zero. Thus b-SSFP yields a very high SNR, in some applications, by cont...
متن کاملImaging periodic currents using alternating balanced steady-state free precession.
Existing functional brain MR imaging methods detect neuronal activity only indirectly via a surrogate signal such as deoxyhemoglobin concentration in the vascular bed of cerebral parenchyma. It has been recently proposed that neuronal currents may be measurable directly using MRI (ncMRI). However, limited success has been reported in neuronal current detection studies that used standard gradien...
متن کاملMultiple Acquisition Fat-Saturated Balanced Steady State Free Precession Imaging
INTRODUCTION While balanced-SSFP (bSSFP) imaging is advantageous in its ability to produce high SNR in short imaging times, its clinical application has been limited due to several well-known shortcomings. The bright signal from fat is typically unwanted, and the short repetition times (TRs) required to avoid banding artifacts lead to limitations in the achievable resolution. This is especially...
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ژورنال
عنوان ژورنال: PLoS ONE
سال: 2014
ISSN: 1932-6203
DOI: 10.1371/journal.pone.0091075