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2016 ; 29
(3
): 417-33
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7 T renal MRI: challenges and promises
#MMPMID27008461
de Boer A
; Hoogduin JM
; Blankestijn PJ
; Li X
; Luijten PR
; Metzger GJ
; Raaijmakers AJ
; Umutlu L
; Visser F
; Leiner T
MAGMA
2016[Jun]; 29
(3
): 417-33
PMID27008461
show ga
The progression to 7 Tesla (7 T) magnetic resonance imaging (MRI) yields promises
of substantial increase in signal-to-noise (SNR) ratio. This increase can be
traded off to increase image spatial resolution or to decrease acquisition time.
However, renal 7 T MRI remains challenging due to inhomogeneity of the
radiofrequency field and due to specific absorption rate (SAR) constraints. A
number of studies has been published in the field of renal 7 T imaging. While the
focus initially was on anatomic imaging and renal MR angiography, later studies
have explored renal functional imaging. Although anatomic imaging remains
somewhat limited by inhomogeneous excitation and SAR constraints, functional
imaging results are promising. The increased SNR at 7 T has been particularly
advantageous for blood oxygen level-dependent and arterial spin labelling MRI, as
well as sodium MR imaging, thanks to changes in field-strength-dependent magnetic
properties. Here, we provide an overview of the currently available literature on
renal 7 T MRI. In addition, we provide a brief overview of challenges and
opportunities in renal 7 T MR imaging.
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