Radio frequency coil device for finger magnetic resonance imaging
A technology of magnetic resonance imaging and radio frequency coils, which is applied in the field of radio frequency coil devices and radio frequency coil devices in magnetic resonance imaging, and can solve problems such as difficult finger fixation and long scanning time
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Embodiment 1
[0038] Example 1 A syringe with a diameter of about 20mm is filled with water as a model to simulate the load of a finger. Apply GE signa 1.5T HDxt MRI scanner, finger finger RF coil adopts figure 2 For the finger RF coil shown, the scan sequence is:
[0039]
[0040] Such as Figure 5 Coronal images for the water model along Figure 5 The two mutually perpendicular directions (RL) and front-to-back directions (IS) measure the SNR at intervals of 2mm, and the diameter of the ROI is 2mm. Such as Figure 6 is the left-right direction (RL), such as Figure 7 In the front-back direction (IS), it can be seen that the image signal is relatively uniform and the SNR is high.
Embodiment 2
[0041] Example 2 The right middle finger of the volunteer was scanned. The volunteer was in a prone position during scanning, with the hand raised above the head, and the palm was placed downward on the palm chassis of the finger RF coil. The scanning equipment and sequence were the same as in Example 1. Such as Figure 8 It is a coronal image, the joint structure is clear, and the plane resolution is 0.156×0.130mm 2 .
Embodiment 3
[0042] Example 3 The right index finger of an RA volunteer. During scanning, the volunteer is in a supine position, and the hands are placed on both sides of the body. The palm is placed downward on the palm base of the finger radio frequency coil. The scanning equipment and sequence are the same as in Example 1, and the application image 3 Arc curved finger RF coils such as Figure 9 It is a coronal image. It can be seen that the fingers have a certain bending deformation, and the synovial membrane of the joints is thickened. Plane resolution is 0.156×0.156mm 2 .
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