Hi Dear, An MRI is a series of detailed picture of your brain, as they were at the time the MRI was done. They are valid as long as no other changes occur. Basically, if somebody has an MRI today that is normal, and have a stroke or hernia tomorrow, obviously the result will change (You never know).
Undo an action. Press Ctrl+Z or click (Undo) in the ribbon until you've fixed your mistake. You can't undo some actions, such as clicking commands on the File tab or saving a file. If you can't undo an action, the Undo command is dimmed.
To undo a rename refactoring operation. On the Edit menu, click Global Undo. The text of the menu option includes the details of the operation that will be undone.For example, the menu might say Global Undo *Rename from ShippedDate to ShippedDateAndTime. You can also click the Undo button on the toolbar.If you click the drop-down arrow on the button, the details of the operation that will be undone appear.o undo a rename refactoring operation. On the Edit menu, click Global Undo. The text of the menu option includes the details of the operation that will be undone.