\documentclass[a4paper]{report}
\usepackage[demo]{graphicx} 
\usepackage{ptext} 
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhead{}
\fancyhead[LO,RO]{\includegraphics[width=1cm, height=1cm]{myfile}}
\fancyfoot{}
\renewcommand{\headrulewidth}{0pt}
\usepackage{xepersian}
\begin{document}
\ptext[1-20]
\end{document}