If convicted, Ms Buchanan could be required to register as a sex offender for 10 years. Her husband was not charged.
Ms Buchanan's lawyers appeared in court on Tuesday to ask a judge to overturn the charges, arguing that they are unconstitutional.
The lawyers cited a previous court ruling that overturned a Colorado ban on women going topless in public.
However the prosecution said that in the US, nudity is commonly understood to include women's breasts.
The judge in the case, Kara Pettit, declined to rule immediately on the case, saying it was “too important of an issue”. A ruling is expected in the next few months.
www.telegraph.co.uk/news/2019/11/21/us-woman-could-forced-register-sex-offender-appearing-topless/
More policing of women's bodies even in their own homes? Or maybe some agree?