The sources in a plaque are copies of the state of inventory entries at the time the source was pulled from inventory and put into the plaque.
Editing an inventory entry does not automatically propagate to the sources in the plaque. If you edit an inventory entry (e.g. change the calibration) and any of the plaques under consideration for the current patient contains sources from that inventory entry, you will be alerted when you close the editor sheet and offered a one time opportunity to update the sources in the plaque(s) to match the current state of the inventory.
Note: you will NOT be alerted to update plaques containing this inventory entry in other (e.g. past) patients.