If you want to scan the entire organism, sure. But higher resolution MRI can also mean "scan a smaller part, with good detail, in the same amount of time". I

If you want to scan the entire organism, sure. But higher resolution MRI can also mean "scan a smaller part, with good detail, in the same amount of time". I could imagine this being useful for e.g. getting a high resolution image of a tumour after conventional imaging was used to locate it.