var radius = 11;


macro "subtract median [q]" {

   Dialog.create("Gimme a number");
   Dialog.addNumber("Please input a median radius", radius);
   Dialog.show();
   radius = Dialog.getNumber();

    title = getTitle();
    run("Duplicate...", "title=med duplicate");
    medid = getImageID();
    run("Median...", "radius="+radius+" stack");
    run("Multiply...", "value=0.9 stack");
    imageCalculator("Subtract create stack", title,"med");
    rename(title+"_med"+radius);
    setSlice(round(nSlices()/2));
    resetMinAndMax();
    selectImage(medid);
    close();

}