def disable_validate_orthogonal():
    """
    Disable the validation whether the volume is orthogonal (so without gantry tilting or alike).
    This allows for converting gantry tilted data.
    The gantry tilting will be reflected in the affine matrix and not in the data
    USE WITH CAUTION!
    """
    global validate_orthogonal
    validate_orthogonal = False
