Render Image Stored in Mongo (GridFS) with Node + Jade + Express

I have a small .png file stored in Mongo using GridFS. I would like to display the image in my web browser using Node + Express + Jade. I can retrieve the image fine e.g.:

FileRepository.prototype.getFile = function(callback,id) {
this.gs = new GridStore(this.db,id, 'r');
this.gs.open(callback);
};

but I don't know how to render it using the Jade View Engine. There doesn't seem to be any information in the documentation.

Can anyone point me in the right direction?

Thanks!