MRI Scanner Machine: Uses, Safety, Preparation, Costs & Post-Scan Expectations

Learn how MRI scanners work, uses, risks, preparation, costs in India, and what to expect before and after a scan.
Medical Equipment Finance
6 min
26 February 2026

What is an MRI scanner?

Magnetic resonance imaging, or MRI, is a diagnostic test that uses a powerful magnet, radio waves and a computer to create detailed images of the body’s organs and internal structures. Unlike X-rays or CT scans, MRI does not involve the use of ionising radiation.

How does an MRI scanner work?

An MRI machine is a large, tube-shaped device that generates a strong magnetic field around the patient. During the scan, controlled pulses of radio waves are transmitted from the scanner. These waves temporarily disturb the alignment of atoms in the body. As the atoms return to their normal position, they emit signals that are captured by a computer. The computer processes these signals to create detailed two-dimensional images of the area being examined, which are displayed on a monitor.

Some MRI machines resemble narrow tunnels, while others are designed to be wider and more open. An MRI scan typically takes between 30 minutes and two hours, depending on the part of the body being assessed.

Applications of MRI scanner

Although MRI scanners are primarily used in clinical settings for medical diagnosis, they have found applications in various industries, including manufacturing, research and development, and agriculture. The technology is compatible with various subjects, including metal structures, which make it a good option in the manufacturing industry for non-destructive testing, in identifying corrosive spots, and other internal defects in the structure. MRIs are useful in pre-clinical studies of animals, drug development, and research in microbiology. In homecare or rehabilitation centres, supporting diagnostic setups with a hospital bed ensures greater comfort for patients undergoing routine scans.

Reasons you may require an MRI of the bones, joints, or soft tissues

In orthopaedics, an MRI is commonly used to evaluate bones, joints and soft tissues such as cartilage, muscles and tendons. It helps detect injuries, structural abnormalities and conditions such as tumours, inflammatory disorders, congenital defects, osteonecrosis, bone marrow disorders and spinal disc herniation or degeneration. MRI may also be used to review the outcome of corrective orthopaedic surgeries and to monitor joint damage caused by arthritis.

Your doctor may recommend an MRI of the bones, joints or soft tissues for various other medical reasons based on your symptoms and clinical findings.

Risks of a Magnetic Resonance Imaging (MRI)

Here are some of the common risks involved when getting an MRI:

  • No radiation risk: MRI does not use ionising radiation, so there is no radiation exposure. However, every patient is screened before the scan.
  • Strong magnetic field: The machine uses a powerful magnet. People with pacemakers, cochlear implants or certain metal implants must inform the technician before the scan.
  • Metal inside the body: Surgical clips, plates, screws or other metal objects may make MRI unsafe in some cases.
  • Claustrophobia concerns: If you feel anxious in closed spaces, speak to your doctor. Medication may be given, and you may need someone to drive you home.
  • Pregnancy precautions: MRI is generally considered safe, but it is usually avoided during the first trimester. Always inform your doctor if you are pregnant or unsure.
  • Use of contrast dye: Some scans require contrast to improve image clarity. There is a small risk of an allergic reaction.
  • Kidney-related risks: Patients with severe kidney disease may face rare complications from contrast dye. Inform your doctor if you have kidney problems or are on dialysis.
  • Other health conditions: Conditions such as asthma, allergies, anaemia, low blood pressure or sickle cell disease should be discussed with your doctor before the scan.
  • Individual medical factors: Risks may vary depending on your overall health. Always share your complete medical history with your doctor before the procedure.

How should I prepare for an MRI?

Here is what you must take care of when preparing for an MRI:

  • Eating and drinking: You can usually eat, drink and take regular medicines as normal. Some specialised scans may require restrictions, and you will be informed in advance.
  • Clothing requirements: You will need to change into a hospital gown. Remove all jewellery, piercings and metal objects, and keep your belongings in the locker provided.
  • During the scan: The MRI is done inside a large tube-shaped machine. You must lie completely still for clear images. Earplugs will be provided due to loud machine noise.
  • Contrast allergy history: If you have had an allergic reaction to contrast dye before, inform your doctor. You may need medication prior to the scan.
  • Claustrophobia concerns: If you feel anxious in closed spaces, speak to your doctor about anti-anxiety medication. Arrange for someone to drive you home if required.
  • Metal inside the body: Inform the medical team if you have any metal implants or fragments in your body, as an MRI uses a strong magnetic field.
  • Implanted devices: Notify the hospital if you have a pacemaker, replaced heart valves, insulin pump, stents, clips, coils or filters.
  • Pregnancy status: Inform your doctor if you are pregnant or suspect pregnancy.
  • Other conditions: Mention body piercings, medication patches, permanent tattoos, past bullet injuries, previous metal work exposure, metal fragments in the body or if you cannot lie flat for 30 to 60 minutes.

Your doctor may advise additional precautions based on your specific medical condition.

Prices of MRI machine in India

MRI machine prices in India differ based on factors such as field strength, technology, brand and installation requirements. Before making a purchase, it is important to compare MRI machine costs and features carefully to choose a system that aligns with your diagnostic needs and operational setup.

Prices of MRI Machine in India according to brands

S. No.

Best MRI Machine Brands

Price Range (Rs)

1

Siemens

Rs 2,00,00,000 - Rs 7,00,00,000

2

Philips

Rs 3,00,00,000 - Rs 10,00,00,000

3

GE Healthcare

Rs 2,50,00,000 - Rs 6,00,00,000


What to expect after an MRI

After the scan, you should get up slowly from the table to prevent dizziness or lightheadedness, especially if you have been lying flat for a long time. If you were given a sedative, you may need to rest until its effects wear off. In such cases, you should avoid driving for the rest of the day.

If contrast dye was used, you may be observed briefly for any side effects such as itching, swelling, rash or difficulty breathing. Once you return home, inform your doctor if you notice pain, redness or swelling at the IV site, as this could indicate infection or a reaction.

In most cases, no special aftercare is required. You can resume your normal diet and daily activities unless advised otherwise by your doctor. Additional instructions may be provided based on your individual condition.

Explore financing options on an MRI machine

Business owners who consider investing in an MRI machine need financing. For those planning to apply, understanding the medical equipment finance eligibility criteria can help streamline the loan process and improve your approval chances. Financing options such as loans are readily available from Bajaj Finserv Medical Equipment Finance, which provides healthcare providers with the financial support they need to invest in state-of-the-art medical devices and equipment. Additionally, evaluating the medical equipment finance interest rate can help you plan better repayment strategies and compare loan offers. Business owners can take advantage of these options to invest in MRI machines and enjoy the benefits that come with owning one. For those looking to expand their infrastructure alongside equipment investment, applying for hospital loans can provide comprehensive financial backing.

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Frequently asked questions

What is an MRI machine used for?

MRI stands for Magnetic Resonance Imaging. An MRI machine is used to take highly detailed images of internal structures of the body.

What is the difference between CT scan and MRI machine?

The primary difference between CT scans and MRIs is the way the images are generated. CT scans use X-rays, while MRIs use a strong magnetic field and radio waves. CT scans are generally faster and can provide a detailed image of bone and other hard tissues, while MRI scans are better for soft tissue and can help detect brain and spinal cord injuries.

Is MRI machine safe?

Yes, MRI machines are generally safe as they do not use ionizing radiation like X-rays or CT scans. However, certain precautions are necessary, such as removing metal objects and informing the technician of any medical implants or conditions, to ensure safety during the procedure.

Which MRI machine is best?

Determining the best MRI machine depends on various factors such as specific clinical needs, budget, and features required.