Without prejudice to the provisions laid down in sections 1 to 8 of this chapter, with the exception of Article R. 4453-16, the provisions of this section apply to the installation, testing, use, development and maintenance of magnetic resonance imaging equipment intended for patient care in the health sector or for research in this field when the preventive measures put in place by the employer under Article R. 4453-13 do not enable workers’ exposure to be kept below the exposure limit values relating to health effects.