dialog.preview.html

<style>
  md-dialog{
    z-index: 190;
  }
</style>
<md-dialog>
  <form ng-cloak>
    <md-toolbar>
      <div class='md-toolbar-tools'>
        <span flex></span>
        <md-button class='md-icon-button' ng-click='close()'>
          <md-icon class='faicon-mini' md-font-icon='fa fa-times'></md-icon>
        </md-button>
      </div>
    </md-toolbar>
    <md-dialog-content>
      <center>
        <img ng-src='/hr/FileDownload.jsp?uploadfield=mcom_profile_file.attac&filename={{ myimg }}'>
      </center>
    </md-dialog-content>
  </form>
</md-dialog>