def dir_dicom_paths(directory):
    """Return list of paths to files within a directory at any level below, beginning with 'I'. This is the naming
    convention expected for the project.

    Args:
        directory (pathlib Path): A path

    Returns:
        (list of pathlib Paths) All paths to files beginning with 'I' within the given directory

    """
    return list(directory.glob("**/I*"))