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1: My measured tissue water T2
values at 3 T are considerably lower than what is stated in the
challenge, should I use my in vivo values or those stated in the
challenge?
A: The data to be fitted is synthetic. It is better to use the
values provided to calculate relaxation correction factors.
2: To generate the basis set, it would be
useful to know the bandwidth and pulse durations. What are the
bandwidth and pulse durations which were used?
A: The data was generated using ideal pulses.
3: In text and JMRUI formats, there are 2 basis set
files, called "Mac.txt" and "PressMac_30ms.txt". Which one is
correct?
A: The basis sets in text and JMRUI formats were updated on
June 29th, 2016 and the confusing and not useful file,
PressMac_30ms.txt, was removed. If you used previous version,
please use Mac.txt for macromolecular baseline.
4: A reference peak at 0 ppm is present in the basis
sets in text format. Is it possible to obtain basis set without the
reference peak?
A: Additional format of basis set was added (text file with no
reference peak at 0 ppm).
5: Did the simulation of glucose include both
alpha-glucose and beta-glucose? If both anomers were used, what was
the ratio used?
A: Glucose was simulated using both anomers, 0.37 alpha-glucose
and 0.63 beta-glucose.
6: Is the Mac spectrum representative of real brain
data?
A: The Mac baseline was obtained experimentally from the brain.
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