Dear experts,
My colleagues and I would greatly appreciate your advice on a matter. We are planning the next stage of a longitudinal study and are trying to weigh up the pros and cons of acquiring certain scans.
In the past we collected t1-weighted scans of these participants on an old 1.5T scanner. This scanner has now, for better or worse, been shut down. We have at our disposal another 1.5T scanner and a 3T scanner, on which we are planning to acquire most of our new sequences.
We have been assured by our team that we can match the old sequence and coil from the old scanner on the new 1.5T to try to obtain comparable scans.
The old scans are however of considerably lower quality than what is available on the new 3T. Our original plan was to collect t1-weighted scans on both scanners (1.5T low quality, backwards compatible and 3T high quality, not so backwards compatible). This seems to lead to a practical problem in getting the required scan time and we are being asked to show that it is really necessary to collect the 'backwards compatible' scan on the 1.5T.
I would greatly appreciate your thoughts on the utility of the scan on the 1.5T if possible.
Best wishes,
Seán
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