MRI Receiving Coil Detection Unit for Head Movement
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Solution Overview
Problem
Existing MRI receiving coil devices face challenges in detecting head movement with high sensitivity during imaging, particularly when imaging the front-head, which affects image quality and requires cumbersome workflows and uncomfortable marker attachment methods.
Innovation Solution
A receiving coil device with a detection unit fixed to the base portion that supports the holder, allowing for the detection of physical displacements, such as using a combination of a marker and camera to image the marker, which improves sensitivity and reduces workflow complexity and discomfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a marker is attached to the subject's nose for movement detection, then movement can be detected, but additional work is required and workflow deteriorates
Solution Approach 1:
The detection unit is merged with the coil support structure (holder portion or base portion), combining the imaging coil and movement detection functions into a single integrated device. This eliminates the need for separate marker attachment and reduces workflow complexity while maintaining movement detection capability.
2Measurement precision
If a marker is attached to the subject's nose for movement detection, then movement can be detected, but comfort of the subject deteriorates such as itching of the nose
Solution Approach 1:
The detection unit is integrated into the coil support structure rather than being attached to the subject's body. This eliminates direct contact with the subject's nose, avoiding discomfort and itching while still enabling movement detection through detection of holder portion displacement.
3Measurement precision
If an air bag is disposed between the coil and subject on the face side for movement detection, then movement can be detected, but onerous work for disposing the air bag is required and workflow deteriorates
Solution Approach 1:
The detection unit is integrated into the coil support structure, eliminating the need for separate air bag disposal. The holder portion itself serves as the detection target, simplifying the workflow to only coil wearing while maintaining movement detection capability.
4Stability of the object's composition
If the back-head is placed on the coil for imaging, then the back-head has little movement, but the front-head movement cannot be detected with high sensitivity
Solution Approach 1:
Instead of detecting movement through the stable back-head region, the detection unit is positioned to detect movement of the holder portion that directly contacts the front-head. This inverts the detection approach from indirect (back-head stability) to direct (front-head movement via holder portion displacement), achieving high sensitivity for front-head movement detection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances the detection sensitivity of head movement without deteriorating the workflow of wearing the coil, eliminates discomfort, and accurately detects movements without erroneous readings, thereby improving image quality by integrating the detection unit with the coil support structure.
Implementation Method 1
The movement is detected as a physical quantity by a detection unit that is fixed to a base portion that supports a holder or fixed between the base portion and the holder portion
Data Source
AI summary
The receiving coil device includes one or a plurality of receiving coils configured to cover a head of a subject, a base portion on which the head of the subject is to be placed, a holder portion supported by the base portion, one of the receiving coils being fixed to the holder portion, a mechanism portion configured to bring the receiving coil fixed to the holder portion into close contact with a part of the head, and further, a detection unit configured to detect a physical quantity related to a displacement of the holder portion on the holder portion or the base portion. The physical quantity detected by the detection unit is sent to an MRI apparatus including the receiving coil device.