Magnetic Resonance Imaging (MRI) is a diagnostic tool that creates detailed images of internal organs, soft tissues, and bone. A closed MRI machine typically features a cylindrical tube that surrounds the patient during the scan. This technology uses strong magnetic fields and radio waves to generate images without using radiation. Understanding the patient experience can help individuals prepare for their procedure.
The Sensory Environment
Patients undergoing a closed MRI encounter a distinct sensory environment. The machine produces loud, repetitive noises, such as knocking, clicking, or whirring sounds. These noises result from electric currents in the scanner coils generating magnetic field changes for imaging. Sound levels can reach around 110 decibels, comparable to a rock concert, making hearing protection important.
Patients are typically provided with earplugs or headphones to reduce the noise, which can abate sound by 10 to 30 decibels. Some facilities offer music through these headphones to enhance comfort. Patients may also feel subtle vibrations as the machine operates. The enclosed, tube-like design of the closed MRI creates a confined space, as the patient lies on a bed that slides into the machine.
Physical Sensations During the Scan
During a closed MRI, patients must remain perfectly still to ensure clear images. Scan times can range from 15 to 90 minutes, depending on the area being imaged and the number of images required. Maintaining one position for an extended period can lead to discomfort, stiffness, or aches. Some patients might find it helpful to ask for cushions or blankets to aid in comfortable positioning.
The temperature within MRI suites is typically kept cool. This cooler environment helps the sensitive MRI equipment operate efficiently and prevents overheating. Patients might feel this coolness more acutely while lying still and wearing a gown. In some cases, a contrast dye may be administered intravenously to enhance image clarity. While generally painless, the injection might cause a temporary cold sensation in the arm or a metallic taste in the mouth, which usually subsides quickly.
Addressing Emotional Responses
The confined nature and loud operational noises of a closed MRI can elicit various emotional responses. Many patients experience anxiety, nervousness, or claustrophobia, a common fear of enclosed spaces. These feelings can be heightened by the sensation of being in a narrow, tube-like space. Panic attacks, with symptoms like increased heart rate and difficulty breathing, can occur in some individuals.
Longer scans might also lead to feelings of boredom or restlessness. Medical staff are aware of these potential emotional challenges and are prepared to offer support.
Preparing for Your Scan
Preparing for a closed MRI can help alleviate potential discomfort and anxiety. Patients must remove all metallic objects, including jewelry, watches, and clothing with metal components, due to the machine’s strong magnetic field. These items can interfere with the magnetic field. It is advisable to wear comfortable clothing without metal.
Discussing anxieties or claustrophobia with medical staff before the scan is beneficial. Healthcare providers may suggest relaxation techniques or, in some cases, prescribe a mild sedative. Medical staff are prepared to offer support and aim to make patients comfortable. Patients can inquire about comfort options such as blankets, music, or eye masks. Communication with the technologist via an intercom system is available throughout the scan, allowing patients to voice concerns or request a pause.