Hi WiseFool,
Welcome to the forum!
Personally, some of my major trauma were domestic violence related, and they are a source of my own PTSD. You did the right thing by leaving and making yourself safe. Whoever called the police also did the right thing as assault is a crime. Even if you don't want to press charges, that is not a decision that is up to you. Once an arrest has been made, (if you live in the United States) it is the state that presses the charges. In essence you are a witness to the law that was broken.
If you believe that his outburst of anger and aggression are PTSD related, then it is entirely up to him to get the help that he needs to address this problem and to correct it. PTSD, a bad childhood, a bad day, a bad temper, etc. are no reason to justify a physical attack on another person. As far as stating a boundary, some boundaries are clearly understood by all members of a society and one of those is "we don't lay hands on another person". I would strongly encourage you to stay somewhere safe and get a restraining order. That will reinforce the boundaries legally.
At this point, your husband has to make some decisions. Only he can decide to get the help that he needs to get better. At the same time you have to make some decisions for yourself. Get some counseling as it is really hard to manage this on your own. Personally, my favorite default thinking patter was "If I hadn't...., he wouldn't have...." Took me a long time to realize that regardless of what I did, he had a lot of other behavioral options that could have been chosen and none of which included physically hurting me.
One things that you need to keep telling yourself, even if you don't believe it at this point is...."A person is solely responsible for their own choices and reactions". No one can change another person, but we can make changes in ourselves so that we can move past hurt, guilt, shame, anger, etc.
There is sister site, MyDomesticViolence.com that you may find helpful. The best thing you can do for you and your relationship is help yourself.
Debbie