def METHOD_NAME(self, filename):
    translate_to_x = {"Bone":_("Bone"),
            "Soft Tissue":_("Soft Tissue"),
            "Enamel (Adult)":_("Enamel (Adult)"),
            "Enamel (Child)": _("Enamel (Child)"),
            "Compact Bone (Adult)": _("Compact Bone (Adult)"),
            "Compact Bone (Child)":_("Compact Bone (Child)"),
            "Spongial Bone (Adult)":_("Spongial Bone (Adult)"),
            "Spongial Bone (Child)":_("Spongial Bone (Child)"),
            "Muscle Tissue (Adult)":_("Muscle Tissue (Adult)"),
            "Muscle Tissue (Child)":_("Muscle Tissue (Child)"),
            "Fat Tissue (Adult)":_("Fat Tissue (Adult)"),
            "Fat Tissue (Child)":_("Fat Tissue (Child)"),
            "Skin Tissue (Adult)":_("Skin Tissue (Adult)"),
            "Skin Tissue (Child)":_("Skin Tissue (Child)"), 
            "Custom":_("Custom")}
    with open(filename, 'rb') as f:
        p = plistlib.load(f, fmt=plistlib.FMT_XML)
    thresh_mri = p['thresh_mri'].copy()
    thresh_ct = p['thresh_ct'].copy()
    thresh_ct_new = {}
    for name in thresh_ct.keys(): 
        thresh_ct_new[translate_to_x[name]] = thresh_ct[name]
    thresh_mri_new = {}
    for name in thresh_mri.keys(): 
        thresh_mri_new[translate_to_x[name]] = thresh_mri[name]    
    self.thresh_mri = TwoWaysDictionary(thresh_mri_new)
    self.thresh_ct = TwoWaysDictionary(thresh_ct_new)