def convert_vector_to_params_structure(params_vector):
    """Convert numpy array of parameters to a parameters dictionary"""
    params = {
        'k10a': params_vector[0],
        'k10b': params_vector[1],
        'k10c': params_vector[2],
        'k10d': params_vector[3],
        'k12a': params_vector[4],
        'k12b': params_vector[5],
        'k13':  params_vector[6],
        'k21a': params_vector[7],
        'k21b': params_vector[8],
        'k21c': params_vector[9],
        'k21d': params_vector[10],
        'k31':  params_vector[11],
        'v1':   params_vector[12],
        'v3':   params_vector[13],
        'age_offset': params_vector[14],
        'weight_offset': params_vector[15],
        'lbm_offset': params_vector[16],
        'height_offset': params_vector[17]
    }
    return params