Investigation of the initial dip in fMRI at 7 Tesla
نویسندگان
چکیده
منابع مشابه
Acquisition Methods for fMRI at 7 Tesla
FMRI and high field, which application? For most imaging applications the benefit of 7+ Tesla scanners is quite obvious: there is more signal which can be used to improve SNR-starved images or, in case of an SNR surplus, it can be invested in shorter acquisitions without compromised image quality. In the typical BOLD fMRI experiment (2-3 mm isotropic spatial resolution, volume TR of 2-3 seconds...
متن کاملSources of signal fluctuations in fMRI at 7 Tesla
The development of high-field magnetic resonance imaging (MRI) systems has allowed for critical improvements in image signal-to-noise ratio (SNR), potentially leading to higher sensitivity and spatial resolution for functional MRI (fMRI) techniques. However, recent studies have shown that these potential advantages become significantly compromised by increased signal fluctuations arising from c...
متن کاملInitial Experience with fMR1 in Humans at 7 Tesla
INTRODUCTION Since its intial demonstration in 1992, fMRl has evolved into a widely used methodology for mapping neuronal function. To date, the majority of fMRI studies are conducted at 1.5 T while more high-field (3T and 4T) machines are becoming increasing available. Experimental and theoretical data have suggested an increase in sensitivity at high field with functional imaging. With the re...
متن کاملPass-band balanced SSFP fMRI at 7 Tesla
INTRODUCTION In fMRI, gradient-echo (GRE) single shot EPI allows a reasonable spatiotemporal resolution with robust functional activation. However, the combination of the long readout duration and echo time makes the method susceptible to image distortion, image blurring and signal dropout. Recently, balanced SSFP (bSSFP) fMRI has been proposed as an alternative method to compensate for these s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: NMR in Biomedicine
سال: 2001
ISSN: 0952-3480,1099-1492
DOI: 10.1002/nbm.715