A nurse is reinforcing teaching with a client who is scheduled for a magnetic resonance imaging (MRI) of the heart and great vessels. Which of the following instructions should the nurse include about this test?

You will need to lie flat for 6 hours following this test.

You will need to withhold food and fluids for 4 hours before this test.

You will need to increase your fluid intake after this test.

You will need to remove metal objects such as jewelry.