A beaded appearance in a hepatic bile duct means along the duct you have areas of strictures (tight spots) and dilation (dialated spots.) Here is a link to a picture that may help with the visual.
I hope this is helpful.
Hugs to you and welcome to the site. We are only a keystroke away.
It actually looks like a string of pearls.
My Mom lost her one year battle with CC on April 3, 2009.
"A prognosis is simply an audit of how truly precious each day is. Live each day to the maximum, celebrate what was, and what is - Don't spend your life looking forward to what will or might be." .... words of wisdom from my beloved son on hearing of his grandmother's CC prognosis.