MRI Scanner Patient Position Sensing using Magnet Sensors

MRI scanners are essential tools in medical diagnostics, providing detailed images of the internal structures of the body. To obtain these images, patients are positioned on a sliding mechanism that moves them into the circular Magnetic Resonance Imaging (MRI) scanner. The movement of this slider is controlled by a motor that rotates a threaded shaft, translating rotational motion into linear motion. Traditionally, the position of the patient is manually monitored or relies on less precise methods, which can lead to inaccuracies in positioning, potentially affecting the quality of the scans and patient comfort.

The integration of magnet sensor technology into MRI scanners addresses these challenges by providing precise, real-time feedback on the patient’s position. Magnet sensors are highly sensitive to magnetic fields and can accurately count the number of turns made by the threaded shaft. By translating these turns into a measurement of distance moved, magnet sensors ensure that the patient’s position is accurately tracked and maintained throughout the scanning process. This precision helps obtaining high-quality images and ensuring the safety and comfort of the patient.

The magnet sensor is strategically placed to detect the magnetic field changes of a ring magnet as the shaft rotates. Each rotation of the shaft corresponds to a specific distance moved by the sliding mechanism. The sensor continuously monitors these rotations and sends real-time feedback to the central processing unit (CPU) of the MRI scanner. This data is then used to precisely control and adjust the patient’s position within the scanner, ensuring optimal alignment for imaging.

The use of magnet sensors in MRI scanners enhances the accuracy and reliability of patient positioning. By providing continuous, precise feedback on the movement of the sliding mechanism, these sensors help maintain the correct position of the patient, leading to better image quality and improved patient safety. Magnet sensor technology thus plays a vital role in optimising the performance and effectiveness of MRI scanning procedures.

Application Classification

Applications are classified as Position Sensing, Pulse Counting, Electromagnetic or Relay, Temperature Sensing or Magnet Biasing types. This application is classified as follows and the link gives more information on best practices to help select the most suitable AT band and matching magnet.

Magnet Biasing Type

Some special field applications, for the sake of circuit logic, security concerns, or a power saving necessity, require a sensing signal Continue reading -> Sep 29, 2024

Recommended Products

The Reed Switches and Sensors used in such MRI applications need to be robust, durable and efficient in meeting a high life expectancy. Our engineers work hard in life testing our products under various conditions, and our intention is to ensure end product durability and life. Although we wouldn’t want to restrict any of our products for use in only certain applications, the recommended products for use in this application are listed below.

Standard Ferro-magnetic Metal Detection Sensor, FM-328

FM-218 Metal Detection Sensor Drawing starFeaturesActuates with Any Ferrous Metal. 10W Contact Rating. Normally Open contact. Continue reading -> Sep 28, 2024

Miniature Ferro-magnetic Metal Detection Sensor, FM-324

FM-324 Miniature Ferro-Magnetic Metal Sensor Drawing starFeaturesActuates with Any Ferrous Metal. 10W Contact Rating. Normally Open Continue reading -> Sep 28, 2024