What Does Open Bore Mean in MRI?

The concept of “open bore” in MRI refers to a scanner with a larger opening compared to traditional closed bore scanners. This feature, also known as a wide bore, serves to accommodate larger patients and mitigate claustrophobia. As a result, it enhances the scanning experience. However, before understanding the specifics of open bore MRI, it’s essential to understand the fundamentals of MRI itself. So, let’s begin.

Explaining MRI

MRI, or magnetic resonance imaging, is a diagnostic technique that utilizes powerful magnets, radio waves, and computer technology to generate detailed images of the body’s internal structures. There are three primary types of MRI machines: closed bore, wide bore, and open MRI.

Let’s explore the characteristics and distinctions of wide bore MRI in comparison to closed bore counterparts.

Open Bore MRI vs. Closed Bore MRI

Basic Differences

MRI imaging exhibits a broad spectrum of field strengths contingent upon resolution.

Open bore MRI systems are tailored for larger patients, resulting in diminished claustrophobia and expedited scanning times. Additionally, their open-bore configuration facilitates easier passage of the patient’s head.

The wide bore aspect also enables simultaneous imaging of multiple body regions in a single scan, allowing for comprehensive imaging of an entire region using a single coil. Furthermore, it affords greater freedom of movement within the magnet.

On the other hand, closed-bore MRI machines are comparatively smaller than open bore counterparts, yet they offer superior resolution. For instance, these machines typically operate with magnetic fields of four teslas or less.

Open MRI in NJ uses wide-bore MRI machines that have an exposed design. It helps achieve high-resolution images while helping the patients suffering from mri claustrophobia panic attack feel relief

Structure

Open-bore MRI scanners come in three main types: active-open, passive-open, or hybrid-open MRI scanners.

Active open bore MRIs resemble closed wide-bore MRIs in NJ in terms of the magnetic features. However, they make use of active shielding while the bottom of the MRI remains open. This feature enables patients with claustrophobia to undergo scanning comfortably without feeling confined.

On the other hand, passive wide bore MRI scanners do not incorporate superconducting coils; instead, they rely on permanent magnet materials. While this results in lower costs for open bore MRIs, it necessitates moving the walls that would typically enclose a closed magnet away during scanning.

Additionally, acquiring new images at different angles adds complexity and increases the expense due to the need for active temperature control of the permanent magnets.

Another unique aspect of the closed wide bore (CWB) magnet design is that it ensures patient comfort while maintaining a high-strength magnetic field. In this case, imaging is performed when one end of the magnet is enclosed in a tube-like structure.

While an open MRI also has a high field strength, it fails to offer the same level of protection to the patients due to its open design. Furthermore, the open design exposes patients and scanning coils to room air, potentially causing discomfort or injury.

To address these concerns, open-bore MRIs require a room airflow barrier to prevent airborne contaminants from infecting patients or the hardware. However, open bore MRI devices often exhibit poor resolution compared to wide bore closed devices.

Benefits of Open Bore MRI

Open-bore MRI machines offer several advantages, including high-resolution imaging with minimal patient discomfort, improved signal-to-noise ratio (SNR), and excellent contrast among various tissue types. Additionally, the larger inner diameter reduces claustrophobia and motion-related artifacts, ensuring a positive experience for patients without compromising image quality.

Preparation for an Open Bore MRI

While MRI technology may seem complex, preparing for the procedure is relatively straightforward. Doctors rely on MRI images for the diagnosis and treatment of many types of medical ailments. Therefore, the following are some advice to follow before entering the MRI scanner:

• Before your appointment, make sure you eat something light to avoid feeling hungry at the time of your appointment. If you have diabetes or require frequent snacks, consult your doctor beforehand.
• Remove any jewelry or accessories before arriving for your appointment, as the strong magnetic field of the MRI machine can cause damage. Additionally, refrain from wearing clothes that are too loose, as they can get caught in the equipment.
• Empty your pockets of all metal objects, including coins, keys, cell phones, pens, or pencils. Some individuals may even opt to remove belts and shoes for the test.
• Wear clothes that you can easily take off and wear back on, as you will have to wear the hospital gown for the scanning process.
• Remember to bring any relaxation aids you may need after the procedure. However, your doctor may also advise medication that helps relax during and after the scan.

Lastly, let your technician know that your doctor has suggested an open-bore MRI with contrast. While most people tolerate the contrast dye well, some may experience headaches or allergic reactions, so it’s essential to communicate any concerns beforehand.

Benefits of Open Bore MRI

The open-bore MRI represents a significant advancement in MRI technology. It combines a broad internal diameter with robust magnet strength and superior image resolution to enhance the medical imaging process.

These scanners are frequently utilized in large hospitals, private clinics, diagnostic imaging centers, and other sizable facilities due to their ability to deliver higher relative field strength compared to smaller open MRIs.

One notable advantage of the open-bore MRI is its elevated signal-to-noise ratio (SNR) when contrasted with smaller models. This improvement stems from the elongated closed-section tube design, enabling lengthier spin echo or gradient echo acquisitions at each “null” point. Consequently, the scanner electronics transmit the necessary 90-degree and 180-degree refocusing pulses.

With a generous internal diameter of 60 cm, open-bore MRI machines produce high-resolution images with exceptional contrast across various tissue types. This spacious design reduces the likelihood of claustrophobia and motion-induced image artifacts, ensuring a comfortable experience for patients while maintaining image quality.

End Word

In conclusion, open-bore MRI systems offer a valuable solution for medical imaging. They combine advanced technology with patient-centric design to optimize diagnostic accuracy and patient experience.