White was released from his PTO on Monday by Boston, per the TSN transaction log.
White joined the Bruins on a professional tryout agreement Tuesday.
Ryan White has been medically cleared and released from his PTO with the Canucks, according to the team's official Twitter account.
White (concussion) is still in concussion protocol but continues to skate on his own, Jeff Paterson of TSN 1040 Vancouver reports.
Per AHL Utica coach Trent Cull, White is believed to have suffered a concussion during Saturday's loss to the Kings and is going through the league's concussion protocol.
White was replaced on the team's roster set to travel to China due to an injury suffered in Los Angeles on Saturday, Jeff Paterson of TSN 1040 reports.
White will join the Canucks at training camp on a professional tryout agreement.
White (illness) will be in the lineup Saturday versus the Cancuks, Michael Russo of the Star Tribune reports.
White isn't expected to be in the lineup for Thursday's game against Philadelphia, Michael Russo of the Star Tribune reports.
White (illness) is listed among the scratches for Tuesday's game against the Sharks.