Radio frequency coil device for human carotid artery magnetic resonance imaging
By covering the carotid artery coil with a flexible outer cover and a concave hyperbolic paraboloid design, the problem of poor fit between the carotid artery coil and the human neck is solved, achieving a higher signal-to-noise ratio and greater user comfort.
Patent Information
- Application Number
- CN202422729417.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-10
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-11-10
AI Technical Summary
Existing carotid artery coils do not fit well with the human neck, resulting in patient discomfort and low signal-to-noise ratio during use, making it difficult to achieve efficient fit through a soft structure.
The left and right radio frequency coils are each covered with a flexible outer shell, and the inner side is a concave hyperbolic paraboloid. It is designed to fit the human neck and jaw. EVA material is used to achieve a closer fit and high signal transmission efficiency.
It improves the fit between the RF coil and the human neck, increasing user comfort and signal reception efficiency, while reducing the overall thickness and ensuring scanning quality.
Smart Images
Figure CN223551874U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of structural components for magnetic resonance imaging, specifically a radio frequency coil device for magnetic resonance imaging of the human carotid artery. Background Technology
[0002] Radio frequency (RF) coils are crucial components of magnetic resonance imaging (MRI) devices. The RF transmitting coil emits excitation pulses to the imaging nuclei, while the RF receiving coil receives the magnetic resonance signals emitted by the human body. The performance of the RF coil directly determines the performance of MRI.
[0003] One of the most important metrics for evaluating radio frequency (RF) receiver coils is the signal-to-noise ratio (SNR). A significant factor affecting the SNR of an RF receiver coil is the distance between the RF receiving channel and the human tissue. The closer the distance, the higher the SNR. Therefore, RF receiver coils are designed specifically for certain parts of the human body, allowing for a higher degree of contact between the coil and the area being diagnosed, thus achieving a higher SNR. This is why there are dedicated coils for different body parts.
[0004] Currently used carotid artery coils mostly employ a cylindrical inner surface structure for the part in contact with the body. This structure has a low conformity to the shape of the human neck, resulting in a large gap between the coil and the neck and poor fit. To achieve a better fit, significant external force is required to compress the coil, causing deformation to increase the fit. Since the human neck is not suitable for prolonged external pressure, patients experience significant discomfort during use. Alternatively, if the coil is sufficiently flexible, a better fit can be achieved with minimal compression deformation. However, currently used carotid artery coils typically have a hard inner shell on the curved surface that contacts the neck, making it difficult to achieve significant deformation under low pressure. Utility Model Content
[0005] In order to overcome the shortcomings of the prior art, and to provide a magnetic resonance device that is simple in structure, comfortable to use, compact in size, and has high signal transmission efficiency, this utility model discloses a radio frequency coil device for magnetic resonance imaging of the human carotid artery.
[0006] This utility model achieves its invention objective through the following technical solution:
[0007] Both the left and right RF coils include an RF signal receiving unit, an RF signal output circuit, an active detuning circuit for the RF unit, and a passive detuning circuit for the RF unit.
[0008] The signal output terminal of the left RF coil is connected to the signal input terminal of the left signal transmission unit via a signal line, and the signal output terminal of the right RF coil is connected to the signal input terminal of the right signal transmission unit via a signal line. The signal output terminals of the left and right signal transmission units are respectively connected to the signal input terminal of the signal amplifier via signal lines, and the signal output terminal of the signal amplifier is connected to the signal plug via a transmission cable.
[0009] The radio frequency coil device for human carotid artery magnetic resonance imaging is characterized in that it further includes a left common-mode suppression unit, a right common-mode suppression unit, and a total common-mode suppression unit.
[0010] The signal output terminal of the left signal transmission unit is connected to the signal input terminal of the left common-mode suppression unit via a signal line. The signal output terminal of the right signal transmission unit is connected to the signal input terminal of the right common-mode suppression unit via a signal line. The signal output terminals of the left and right common-mode suppression units are respectively connected to the signal input terminal of the signal amplifier via signal lines. The signal output terminal of the signal amplifier is connected to the signal input terminal of the total common-mode suppression unit via a signal line. The signal output terminal of the total common-mode suppression unit is connected to the signal plug via a transmission cable.
[0011] The radio frequency coil device for magnetic resonance imaging of the human carotid artery is characterized by:
[0012] The left RF coil, left signal transmission section, and left common-mode suppression section are all covered by a flexible outer casing.
[0013] The right RF coil, the right signal transmission section, and the right common-mode suppression section are all covered by a right flexible outer casing.
[0014] The top of the inner sides of both the left flexible outer cover covering the left radio frequency coil and the right flexible outer cover covering the right radio frequency coil are concave hyperbolic paraboloids. The two hyperbolic paraboloids are symmetrically arranged and joined together to form a closed ring to fit the neck and jaw of a person.
[0015] Both the left and right flexible outer covers are made of EVA.
[0016] The advantages of this invention are: simple structure, comfortable to use, compact size, and high signal transmission efficiency. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the structure of the left and right radio frequency coils covered with a flexible outer casing in this utility model; Detailed Implementation
[0019] The present invention will be further illustrated by specific embodiments below.
[0020] Example 1
[0021] A radio frequency coil device for magnetic resonance imaging of the human carotid artery includes a left radio frequency coil 11, a right radio frequency coil 12, a left signal transmission unit 21, a right signal transmission unit 22, a signal amplifier 3, and a signal plug 4, as shown below. Figure 1 and Figure 2 As shown, the specific structure is:
[0022] Both the left RF coil 11 and the right RF coil 12 include an RF signal receiving unit, an RF signal output circuit, an active detuning circuit for the RF unit, and a passive detuning circuit for the RF unit.
[0023] The signal output terminal of the left RF coil 11 is connected to the signal input terminal of the left signal transmission unit 21 via a signal line, and the signal output terminal of the right RF coil 12 is connected to the signal input terminal of the right signal transmission unit 22 via a signal line. The signal output terminals of the left signal transmission unit 21 and the right signal transmission unit 22 are respectively connected to the signal input terminal of the signal amplifier 3 via signal lines. The signal output terminal of the signal amplifier 3 is connected to the signal plug 4 via a transmission cable.
[0024] The radio frequency coil device for human carotid artery magnetic resonance imaging is characterized by further comprising a left common-mode suppression unit 51, a right common-mode suppression unit 52, and a total common-mode suppression unit 53.
[0025] The signal output terminal of the left signal transmission unit 21 is connected to the signal input terminal of the left common mode suppression unit 51 via a signal line. The signal output terminal of the right signal transmission unit 22 is connected to the signal input terminal of the right common mode suppression unit 52 via a signal line. The signal output terminals of the left common mode suppression unit 51 and the right common mode suppression unit 52 are respectively connected to the signal input terminal of the signal amplifier 3 via signal lines. The signal output terminal of the signal amplifier 3 is connected to the signal input terminal of the total common mode suppression unit 53 via a signal line. The signal output terminal of the total common mode suppression unit 53 is connected to the signal plug 4 via a transmission cable.
[0026] The radio frequency coil device for magnetic resonance imaging of the human carotid artery is characterized by:
[0027] Flexible outer cover,
[0028] The right RF coil 12, the right signal transmission section 22, and the right common-mode suppression section 52 are all covered by a right flexible outer casing.
[0029] The top of the inner sides of both the left flexible outer cover covering the left radio frequency coil 11 and the right flexible outer cover covering the right radio frequency coil 12 are concave hyperbolic paraboloids. The two hyperbolic paraboloids are symmetrically arranged and joined together to form a closed ring to fit the neck and jaw of a person.
[0030] Both the left and right flexible outer covers are made of EVA.
[0031] The hyperbolic paraboloid, also known as the saddle surface, has a central groove 511 in the left flexible outer cover 51 that fits the neck of the human body, and a top groove 512 in the left flexible outer cover 51 that fits the lower jaw of the human body.
[0032] The left RF coil 11 and right RF coil 12 are covered with a flexible outer casing, as shown in the figure. Figure 2 As shown, Figure 2 The mid-surface A and surface B are surface images obtained when the tomographic plane is tangent to the two radiofrequency coils during coronary artery scanning.
[0033] This embodiment provides a more convenient and comfortable carotid artery magnetic resonance imaging device. In use, the left radio frequency coil 11 and the right radio frequency coil 12 are respectively attached to the outer surface of the human neck via the left and right flexible outer covers, thus encasing the neck from both sides. Because the curved shape is more suitable for the shape of the human neck, it fits more closely, making it more convenient and comfortable to use, resulting in higher signal reception efficiency and a reduced overall thickness. Due to the use of flexible outer covers, even if the neck and the curved surface of the radio frequency coils are not perfectly matched, deformation through compression can ensure a complete fit between the radio frequency coils and the neck, thereby guaranteeing optimal reception and ensuring the comfort of the patient being scanned.
Claims
1. A radio frequency coil device for magnetic resonance imaging of the human carotid artery, comprising a left radio frequency coil (11) and a right radio frequency coil (12), characterized in that: It also includes a left signal transmission unit (21), a right signal transmission unit (22), a signal amplifier (3), and a signal plug (4). Both the left RF coil (11) and the right RF coil (12) include an RF signal receiving unit, an RF signal output circuit, an active detuning circuit for the RF unit, and a passive detuning circuit for the RF unit. The signal output terminal of the left RF coil (11) is connected to the signal input terminal of the left signal transmission unit (21) via a signal line. The signal output terminal of the right RF coil (12) is connected to the signal input terminal of the right signal transmission unit (22) via a signal line. The signal output terminals of the left signal transmission unit (21) and the right signal transmission unit (22) are respectively connected to the signal input terminal of the signal amplifier (3) via signal lines. The signal output terminal of the signal amplifier (3) is connected to the signal plug (4) via a transmission cable.
2. The radio frequency coil device for magnetic resonance imaging of the human carotid artery as described in claim 1, characterized in that: It also includes a left common-mode suppression section (51), a right common-mode suppression section (52), and a total common-mode suppression section (53). The signal output terminal of the left signal transmission unit (21) is connected to the signal input terminal of the left common mode suppression unit (51) via a signal line. The signal output terminal of the right signal transmission unit (22) is connected to the signal input terminal of the right common mode suppression unit (52) via a signal line. The signal output terminals of the left common mode suppression unit (51) and the right common mode suppression unit (52) are respectively connected to the signal input terminal of the signal amplifier (3) via signal lines. The signal output terminal of the signal amplifier (3) is connected to the signal input terminal of the total common mode suppression unit (53) via a signal line. The signal output terminal of the total common mode suppression unit (53) is connected to the signal plug (4) via a transmission cable.
3. The radio frequency coil device for magnetic resonance imaging of the human carotid artery as described in claim 2, characterized in that: The left RF coil (11), the left signal transmission section (21), and the left common-mode suppression section (51) are all covered by a flexible outer casing. The right radio frequency coil (12), the right signal transmission section (22), and the right common mode suppression section (52) are all covered by a right flexible outer casing. The top of the inner surfaces of both the left flexible outer cover covering the left radio frequency coil (11) and the right flexible outer cover covering the right radio frequency coil (12) are concave hyperbolic paraboloids. The two hyperbolic paraboloids are symmetrically arranged and joined together to form a closed ring.