A kind of microwave ablation antenna with magnetic orientation deviceTechnical field
The present invention relates to microwave ablation techniques field, specifically a kind of microwave ablation antenna with magnetic orientation device,In clinical ablation operation, the real-time tracking and positioning for treating the three-dimensional coordinate position in tissue is may be implemented in.
Background technology
Microwave thermal ablation techniques are that, under image-guided, microwave ablation antenna percutaneous puncture is to tumor focus position.MicrowaveThe microwave energy Jing ablation lines of ablatograph transmitting are sent to microwave ablation antenna, and microwave energy passes through microwave ablation antenna spokePenetrate and be transmitted to tumor focus tissue, microwave energy makes the polar molecule whirling vibration in tissue and produces heat effect.Microwave ablationIt is that tumor cell coagulation necrosiies are made by the form of heat, to reach oncotherapy purpose.
A vital step of microwave ablation operation is will be the transmitting position (syringe needle) of microwave ablation antenna safe and accurateThe tumor locus for being punctured to treatment, need to avoid rib, blood vessel, important organ etc. in piercing process.
Microwave current ablation antenna mainly has following problem in clinical piercing process：
(1) melt antenna and puncture the doctor for needing to have abundant clinical experience and there are the Professional knowledges such as surgery dissecting, ultrasoundLife is completed.According to the image data information such as ultrasound, CT, MRI, the three dimensions imagination is carried out, the tool current to determine ablation antennaBody locus, also need to avoid other blood vessels, internal organs.For the new doctor for carrying out microwave ablation research, for numerous constraint barsPart, aobvious are unable to do what one wishes, have no way of doing it.
(2) in actual clinical treatment, as tumor tissues structure (harden, beat iodine tincture etc.) is more complicated, meltDuring image-guided puncture, ablation antenna syringe needle develops unclear in some tissues to antenna, and doctor is not easyJudge the exact position of current ablation antenna.
Ablation antenna with positioner, can provide ablation antenna three-dimensional position letter in the clinical puncture of ablationBreath.Under the cooperation that 3-D view processes soft and hardware, Real time dynamic display melts antenna inserting needle route and position.
There is following weak point in the existing ablation antenna with positioner：
(1) ablation antenna its positioner for currently possessing positioner is usually located at the handle of ablation antenna.DisappearingMelt before antenna dispatches from the factory, the position coordinateses of localizer in handle and syringe needle are carried out into calibration, memorizer is stored in.However, actually facingWhen bed treatment is punctured, mast may bend, and now the relative dimensional coordinate position of syringe needle and handle changes, i.e., originalThe Calibration Data of storage produces deviation, ultimately causes location position data deviation, affects positioning precision.
(2) the magnetic orientation device that existing ablation antenna is equipped with, there is not waterproof the outside of set winding and prevents the exhausted of short circuitEdge protection device, when actually used, is likely to result in the situation of magnetic locator short circuit or failure.
The content of the invention
It is an object of the invention to overcome the deficiency of prior art, there is provided a kind of microwave ablation day with magnetic orientation deviceLine, magnetic orientation device is installed near the needle point position of microwave ablation antenna, provides essence to melt antenna clinic Needle localizationQuasi- three dimensional local information, and outside offer insulating sheath protection device, prevent set winding Effect of Short Circuit Needle localization.
The present invention is adopted the following technical scheme that：
A kind of microwave ablation antenna with magnetic orientation device, it is characterized in that including syringe needle (1), microwave transmission cable (2),Shank (3), handle (4), water tank (5), magnetic locator (6) and position control device (7), shank (3) one end is with handle (4) evenConnect, the other end is connected with syringe needle (1), microwave transmission cable (2) is connected with syringe needle (1) through inside shank (3), described magnetic is fixedPosition device (6) include alignment sensor (6-1), connecting line (6-2) and protecting pipe (6-3), the connecting line (6-2) of magnetic locator 6 andAlignment sensor (6-1) positioned at syringe needle (1) position connects, and alignment sensor (6-1) and connecting line (6-2) outer surface are provided with shieldSleeve pipe (6-3).
The connecting line (6-2) of the magnetic locator 6 through water tank (5), through in shank (3) and microwave transmission cable (2)Between space be connected positioned at the alignment sensor (6-1) of syringe needle (1) position, or the connecting line (6-2) of the magnetic locator 6Through water tank (5), it is connected via the outside alignment sensor (6-1) with positioned at syringe needle (1) position of shank (3).
Microwave power signal Jing microwave transmission cable 2 is sent to syringe needle 1, and microwave signal is radiated treatment by syringe needle 1In tissue.
The Magnetic oriented signal of alignment sensor (6-1) is transferred to position control device (7) by connecting line (6-2) and carries outPosition information process.Protecting pipe (6-3) is wrapped in sensor (6-1) and connecting line (6-2) is outside, prevents ablation needle interior circulation liquidThe impact of body or short circuit metal to alignment sensor 6-1.
The alignment sensor (6-1) is arranged against the rear end of syringe needle (1).
The integrity of transmitting antenna will not be destroyed, the impedance matching of antenna is not interfered with yet.Alignment sensor (6-1) andThe relative position of syringe needle (1) is fixed, and positioning will not cause error due to the bending of shank.
The position control device (7) includes memorizer (7-1), adapter (7-2), interface unit (7-3), magnetic control listFirst (7-4) and magnetic field generator (7-5), as shown in Figure 4.There is positioning in magnet control unit (7-4) control magnetic field generator (7-5)Simultaneously its electricity of digitized is amplified by interface unit (7-3) in required magnetic field, the location information Jing adapter (7-2) of magnetic locator (6)Signal, interface unit (7-3) for increasing the transmission range between magnet control unit (7-4) and magnetic locator (6), while maximumNoise for data is reduced limit, magnet control unit (7-4) receives and parses through the signal of Processing Interface unit (7-3), i.e.,Obtain the coordinate position of the alignment sensor (6-1) of magnetic locator (6).
Compared with prior art, the invention has the advantages that：
(1) alignment sensor is installed to microwave ablation antenna near the position of needle point by the present invention, that is, avoid due to pinRod bending, causes the impact to positioning precision；Shadow will not be caused to the integrity of microwave ablation antenna structure and impedance matching againRing.
(2) alignment sensor coil outer of the invention provides insulating sheath protection device, prevents set winding and connectionAfter line surface fracture, blood, cool circulation water or the metallic conductor for contacting produce short-circuit impact to which.
Description of the drawings
Fig. 1 is the structural representation of the ablation antenna of the present invention.
Fig. 2 is the partial enlarged drawing of A in Fig. 1.
Fig. 3 is along B-B directions sectional view in Fig. 2.
Fig. 4 is the electromagnetism tracing-positioning system theory diagram of the present invention.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figures 1 to 4, a kind of microwave ablation antenna with magnetic orientation device, including syringe needle (1), microwave transmissionCable (2), shank (3), handle (4), water tank (5), magnetic locator (6) and position control device (7), shank (3) one end and handssHandle (4) connects, and the other end is connected with syringe needle (1), and microwave transmission cable (2) is connected with syringe needle (1) through inside shank (3), instituteThe magnetic locator (6) stated includes alignment sensor (6-1), connecting line (6-2) and protecting pipe (6-3), the connecting line of magnetic locator 6(6-2) be connected positioned at the alignment sensor (6-1) of syringe needle (1) position, alignment sensor (6-1) and connecting line (6-2) appearanceFace is provided with protecting pipe (6-3).
The connecting line (6-2) of the magnetic locator (6) through water tank (5), through shank (3) and microwave transmission cable (2)Middle space is connected with the alignment sensor (6-1) positioned at syringe needle (1) position, or the connecting line (6- of the magnetic locator 62) through water tank (5), it is connected via the outside alignment sensor (6-1) with positioned at syringe needle (1) position of shank (3).
The Magnetic oriented signal of alignment sensor (6-1) is transferred to position control device (7) by connecting line (6-2) and carries outPosition information process.Protecting pipe (6-3) is wrapped in sensor (6-1) and connecting line (6-2) is outside, prevents ablation needle interior circulation liquidThe impact of body or short circuit metal to alignment sensor (6-1).
The alignment sensor (6-1) is arranged against the rear end of syringe needle (1).
The integrity of transmitting antenna will not be destroyed, the impedance matching of antenna is not interfered with yet.Alignment sensor (6-1) andThe relative position of syringe needle (1) is fixed, and positioning will not cause error due to the bending of shank.
The position control device (7) includes memorizer (7-1), adapter (7-2), interface unit (7-3), magnetic control listFirst (7-4) and magnetic field generator (7-5), as shown in Figure 4.There is positioning in magnet control unit (7-4) control magnetic field generator (7-5)Simultaneously its electricity of digitized is amplified by interface unit (7-3) in required magnetic field, the location information Jing adapter (7-2) of magnetic locator (6)Signal, interface unit (7-3) for increasing the transmission range between magnet control unit (7-4) and magnetic locator (6), while maximumNoise for data is reduced limit, magnet control unit (7-4) receives and parses through the signal of Processing Interface unit (7-3), i.e.,Obtain the coordinate position of the alignment sensor (6-1) of magnetic locator (6).
Magnetic locator 6 includes alignment sensor (6-1), connecting line (6-2), protecting pipe (6-3) composition, as shown in Figure 2.MagneticLocalizer (6) can be 5DOF Sensor (such as model 610005,610099,610090 etc.), or 6DOF Sensor(such as model 610029,610059 etc.).Alignment sensor (6-1) Magnetic oriented signal is transferred to positioning by connecting line (6-2)Control device (7) carries out position information process.Protecting pipe (6-3) is wrapped in sensor (6-1) and connecting line (6-2) is outside, preventsThe only impact of ablation needle interior circulation liquid or short circuit metal to alignment sensor (6-1).Protecting pipe (6-3) can adopt plastics materialMaterial, it would however also be possible to employ without magnetic metal material.
Magnetic locator (6) and position control device (7) composition ablation needle tracing-positioning system, the system are tracked using electromagnetismAlignment system, electromagnetism tracing-positioning system can be realized being accurately positioned in the case where blocking, such as NDI Aurora electromagnetism withTrack alignment system.Magnetic locator (6) receives Magnetic oriented information, and position control device (7) produces the signal needed for positioning, andThe location information dissection process of magnetic locator (6) are received, to obtain the coordinate that magnetic locator (6) melts syringe needle (1)Position.
As magnetic locator (6) and ablation needle syringe needle (1) have a certain distance, in ablative surgery, it would be desirable to knowRoad is the position for melting antenna pointed end, so what memorizer (7-1) was demarcated for storage ablation antenna pointed end and magnetic locator 6Relative position information, memorizer (7-1) are single line memory SROM.Electromagnetism tracing-positioning system can also be Ascension 3DGuidance medSAFE medical 3 D navigation system.
Microwave power signal Jing microwave transmission cable (2) is sent to syringe needle (1), and microwave signal passes through syringe needle
(1) it is radiated in the tissue for the treatment of.Syringe needle and shank adopt high intensity, non-magnetic medical stainless steel tube material,Titanium alloy material can also be adopted, and prevent from the impact of hour hands rod bending or magnetisable material to positioning precision being punctured clinical.MicrowaveTransmission cable (2) transmits microwave power signal using coaxial cable.
Embodiment described above is only that the preferred embodiment of the present invention is described, not the structure to the present inventionThink and scope is defined, under the premise of without departing from design concept of the present invention, ordinary skill technical staff is to this in this areaVarious modifications and improvement that bright technical scheme is made, all should fall into protection scope of the present invention, the skill that the present invention is claimedArt content has all been recorded in detail in the claims.