Abstract #2896
A 16-element receive array for human cardiac 31 P MR spectroscopy at 7T
Christopher T. Rodgers 1 , William Clarke 1 , Dominik Berthel 2 , Stefan Neubauer 1 , and Matthew Robson 1
1
Radcliffe Department of Medicine, Univ
Oxford, Oxford, United Kingdom,
2
Rapid
Biomedical GmbH, Germany
Applications of
31
P-MRS
have been hampered by low SNR. We recently introduced
cardiac
31
P-MRS
at 7T with a 10cm loop, where SNR increased 2.8x vs 3T.
Now, we introduce a 16-element cardiac array. This array
has receive SNR 3.6x higher than our standard 3T coil in
phantoms. In 5 men, extrapolating to fully-relaxed 90
spectra, we see 75% gains in potential SNR vs the 10cm
loop. However, the array's B
1
+
is
inadequate, making skeletal muscle saturation difficult
and necessitating short TRs for optimal SNR which
exacerbate uncertainties in blood- and
saturation-correction leading to implausibly high
measured PCr/ATP ratios.
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