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System and method for navigating minimally invasive surgery

A technology of minimally invasive surgery and navigation system, applied in the field of magnetic resonance, which can solve the problems of not developing imaging methods for special navigation system navigation

Pending Publication Date: 2017-06-13
谱影医疗科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the 1990s in my country, a small number of permanent magnet MRI systems have been used in clinical trials of interventional therapy in medical research institutions, but they are basically simple combinations of existing diagnostic permanent magnet imaging systems and general-purpose optical tracking locators. Developed a dedicated navigation system with unique advantages in MRI technology and imaging methods suitable for navigation are widely used in minimally invasive surgery and interventional therapy

Method used

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  • System and method for navigating minimally invasive surgery
  • System and method for navigating minimally invasive surgery
  • System and method for navigating minimally invasive surgery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] Example 1 Fast local spin echo scanning

[0115] Based on the above MRI navigation system and navigation process, fast navigation sequence selection Figure 13 The local spin echo sequence Local-SE-NV shown, wherein the 90° RF pulse is preferably Figure 14 Minimum phase SLR pulses shown, two 180° refocused RF pulses optional Figure 15 The minimum phase SLR pulse shown or Figure 26 The linear phase SLR pulse shown. When the radio frequency power is insufficient, the radio frequency bandwidth can be reduced and the time-band product TBP can be kept unchanged, and the SLR pulse width can be adjusted accordingly, and the data point interval time of the waveform file can be adjusted according to the required SLR pulse width, and the gradient amplitude in the sequence parameter table can be adjusted at the same time until the desired layer thickness is obtained. In the case of metal artifact interference, the receiver bandwidth is preferably 100kHz or higher, the echo ...

Embodiment 2

[0118] Embodiment 2 Fast local multi-echo scanning

[0119] Based on the above MRI navigation system and navigation process, fast navigation sequence selection Figure 16 The local multiple gradient echo sequence Local-ME-NV shown, where the 90° RF pulse is preferably Figure 14 Minimum phase SLR pulses shown, first and second 180° refocused RF pulses selected Figure 15 The minimum phase SLR pulse shown or Figure 26 The linear phase SLR pulse shown. When the radio frequency power is insufficient, the radio frequency bandwidth can be reduced and the time-band product TBP can be kept unchanged, and the SLR pulse width can be adjusted accordingly, and the data point interval time of the waveform file can be adjusted according to the required SLR pulse width, and the gradient amplitude in the sequence parameter table can be adjusted at the same time to the desired layer thickness. In the case of metal artifact interference, the receiver bandwidth is preferably 100kHz or high...

Embodiment 3

[0127] Embodiment 3 Fast local three-layer synchronous scanning

[0128] Based on the above MRI navigation system and navigation process, fast navigation sequence selection Figure 18 Multilayer simultaneous excitation of the Local-MSME-NV sequence is shown. In order to increase the uniformity of RF excitation, the waveform of the first RF pulse of the imaging sequence adopts Figure 20 The linear-phase SLR pulse waveform is shown; and, in order to stimulate multiple layers of the body simultaneously, the RF pulse waveform is phase-encoded as follows:

[0129]

[0130] Here, SLR(t) denotes a linear phase SLR pulse, G s Indicates that the layer selection direction is The gradient strength of It is a vector representing the spatial position of the central layer, which can be set directly on the positioning image. Here, it is set as the isocenter. The position of the adjacent layer is set by the layer thickness THK and the layer distance ΔS in the layer selection directi...

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Abstract

The invention discloses a system and a method for navigating a minimally invasive surgery. The system which is transformed aiming at the requirements of the minimally invasive surgery and intraoperative navigation has the main characteristics that magnets are designed into open type U-shaped structures, a gap between the magnets is greater than 500nm, a radio frequency transmitting and receiving coil is designed into a double-plane circular polarization type, a gradient coil is designed into a double-plane main coil, and a double-plane axial shielding coil is additionally arranged at the outer side of the gradient coil. The invention also relates to a navigation control process and an intraoperative navigation imaging method for clinic application. According to a structure and the method, disclosed by the invention, the opening degree, the safety and the convenience of the system required by the minimally invasive surgery are ensured; particularly, the magnetic resonance imaging quality and the instantaneity are improved, and accurate location of surgical instruments and accurate control of a surgical path are ensured.

Description

technical field [0001] The invention relates to the field of magnetic resonance technology, in particular to a navigation system and method for minimally invasive surgery. Background technique [0002] Precise minimally invasive treatment technology is conducive to improving the curative effect and reducing the pain of patients, and it has been more and more applied in clinical medicine. Radiation therapy technologies such as laser, X-ray, and gamma rays, high-intensity focused ultrasound technology, interventional therapy technologies such as thermal ablation and cryoablation, and various other minimally invasive surgeries require image-guided technology to accurately locate lesions and perform real-time accurate treatment during treatment. Monitor the reach and efficacy of electromagnetic waves, ultrasound, or surgical instruments on the target. Compared with imaging technologies such as ultrasound and CT, magnetic resonance imaging (MRI) technology not only has the advan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B34/20A61B34/10
CPCA61B2560/0223
Inventor 罗会俊
Owner 谱影医疗科技(苏州)有限公司
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