A 43-year-old Dedham man and his 36-year-old female passenger were involved in a near-fatal motorcycle crash Sunday night in Canton, according to State Police.

Troopers responded to the single vehicle accident on I-93 southbound at exit 2B just before 8 p.m. Sunday.

According to State Police, a preliminary investigation revealed that the operator lost control of the motorcycle and sustained life-threatening injuries in the ensuing crash.

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He was taken by medical helicopter to Brigham and Women’s Hospital in Boston.

The female passenger, also of Dedham, sustained serious but not-life-threatening injuries and was brought to Norwood Hospital by ambulance.

Interstate 93 was closed in both directions for a short period of time while State Police investigating. The cause of the crash remains under investigation, State Police said.