System and method to assess risk of changes to brain white matter based on head impact dose equivalent number

A system to assess risk of changes to brain white matter based on a head impact dose equivalent number comprising:

• a sensor system adapted to directly or indirectly measure an energy of each impact to at least one individual that causes a repetitive head impact (RHI), said at least one individual belonging to a sub-population;
• a clock means configured to provide a time;
• a computer communicatively coupled to said sensor system or to a non-volatile memory having stored thereon data from said sensor system to estimate an energy of each RHI event, and communicatively coupled to said clock means to associate thereto each energy of each RHI event a RHI time stamp and to record a time stamped energy for each RHI event;
• a head impact dose equivalent number (HIDEN) process running on said computer, said HIDEN process to calculate a HIDEN for a most recent RHI event based on an energy of said most recent RHI event, a time of said most recent RHI, and all previously recorded RHI events available in a non-volatile memory, each RHI event of all previously recorded RHI events time weighted by the time between each of said all previously recorded RHI events and said time of said most recent RHI;
• a sub-population function process running on said computer or on another computer communicatively coupled to said computer, said sub-population function process configured to calculate a risk assessment number based on said sub-population to which said at least one individual belongs and said HIDEN for said most recent RHI event;
• and
• a risk assessment notification means to assess risk of changes to brain white matter communicatively coupled to said computer or to said another computer, said risk assessment notification means configured to provide a notification of said risk assessment number.