Drain pineapple, reserving juice; set aside 1 cup pineapple and 3 tablespoons juice (refrigerate remaining pineapple and juice for another use).
In a large bowl, combine the rice, chicken, celery, almonds, raisins, green onions and reserved pineapple.
In a small bowl, combine the mayonnaise, mustard, curry powder, salt and reserved juice. Gently stir into rice mixture. Cover and refrigerate for at least 1 hour. serve in a lettuce-lined bowl if desired.