US20220265381A1 - Methods and systems for controlled deployment of needles in tissue - Google Patents

Abstract

Needles are deployed in tissue under direct ultrasonic or other imaging. To aid in deploying the needle, a visual needle guide is projected on to the image prior to needle deployment. Once the needle guide is properly aligned, the needle can be deployed. After needle deployment, a safety boundary and treatment region are projected on to the screen. After confirming that the safety boundary and treatment regions are sufficient, the patient can be treated using the needle.

Description

CROSS-REFERENCE TO RELATED APPLICATION
• This application is a continuation of U.S. patent application Ser. No. 16/841,201, filed Apr. 6,2020; which is a continuation of U.S. patent application Ser. No. 15/595,659, filed May 15, 2017; which is a continuation of U.S. patent application Ser. No. 13/589,975, filed Aug. 20, 2012; which is a continuation of U.S. application Ser. No. 13/307,304, filed Nov. 30, 2011, now U.S. Patent No. 8,262,577; which is a continuation of U.S. patent application Ser. No. 12/245,567, filed on Oct. 3,2008, now U.S. Patent No. 8,088,072; which claims the benefit of Provisional Application No. 60/979,613, filed on Oct. 12, 2007; the full disclosures of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
• 1. Field of the Invention. The present invention relates generally to medical methods and apparatus. More particularly, the present invention relates to methods and systems for controlling the deployment of needles using visual feedback from an ultrasonic or other image.
• Current medical treatments of organs and tissues within a patient's body often use a needle or other elongate body for delivery of energy, therapeutic agents or the like. Optionally the methods use ultrasound imaging to observe and identify a treatment target and the position of the needle relative to the treatment target.
• Of particular interest to the present invention, a treatment for uterine fibroids has recently been proposed which relies on the transvaginal positioning of a treatment device in the patient's uterus. A radiofrequency or other energy or therapeutic delivery needle is deployed from the device into the fibroid, and energy and/or therapeutic substances are delivered in order to ablate or treat the fibroid. To facilitate locating the fibroids and positioning the needles within the fibroids, the device includes an on-board ultrasonic imaging array with a field of view in a generally lateral direction from an axial shaft. A curved needle is advanced from the shaft and into the field of view so that the needle can be visualized and directed into the tissue and the targeted fibroid. The geometry of the needle deployment is advantageous since it permits the location and treatment of fibroids which are laterally adjacent to the shaft.
• While effective and very beneficial for patients, such needle ablation and treatment protocols face several challenges. First, initial deployment of the needle can be difficult, particularly for physicians who have less experience. While the physician can view the tissue and target anatomy in real time on an imaging screen, it can be difficult to precisely predict the path the needle will take and assess its final treatment position. While the needle can certainly be partially or fully retracted and redeployed, it would be advantageous to minimize the number of deployments required before treatment is effected.
• A second challenge comes after the needle has been deployed. While the position of the needle can be observed on the ultrasonic or other visual image, the treatment volume resulting from energy or other therapeutic delivery can be difficult to predict. As with initial positioning, experience will help but the need to exercise judgment and conjecture is best reduced.
• A third challenge is in assuring that nearby sensitive tissue structures, such as the serosa surrounding the myometrium, are not unintentionally damaged. As with judging the treatment volume, predicting the safety margin of the treatment can be difficult.
• For these reasons, it would be desirable to provide improved systems and methods for the deployment of energy delivery and other needles within ultrasonic or other imaging fields of view in energy delivery or other therapeutic protocols. It would be particularly useful to provide the treating physician with information which would assist in initial deployment of a needle in order to improve the likelihood that the needle will be properly positioned relative to a targeted anatomy to be treated. It would also be desirable, once the needle has been deployed, to provide feedback to the physician to assist in accurately predicting a treatment volume. Such information should allow the physician, if necessary, to reposition the needle in order to increase the likelihood of fully treating the anatomy. Furthermore, it would be desirable to provide feedback to the physician allowing the physician to assess a safety margin so that sensitive tissue structures are not damaged. All such feedback other information are preferably provided visually on the ultrasonic or other imaging screen so that the needle position can be quickly predicted, assessed, and treatment initiated. At least some of these objectives will be met by the inventions described hereinafter.
• 2. Description of the Background Art. U.S. Patent Publication No. 2006/0189972, published on Aug. 24, 2006 and commonly assigned with the present application, describes probes useful for both imaging and treating uterine fibroids, which probes could be used in the systems and methods of the present application. Other commonly assigned applications describing probes useful for treating uterine fibroids in the systems and methods of the present invention include application Ser. No. 11/409,496, filed on Apr. 20, 2006; Ser. No. 11/564,164, filed on Nov. 20, 2006; Ser. No. 11/620,594 , filed on Jan. 5, 2007; and copending provisional application No. 60/938,140, filed on May 15, 2007, the full disclosures of which are incorporated herein by reference. Other related, commonly assigned applications are Ser. No. 11/620,569, filed Jan. 5, 2007; and Ser. No. 11/775,452, filed on Jul. 10, 2007. The full disclosures of each of these commonly owned, pending applications are incorporated herein by reference.
BRIEF SUMMARY OF THE INVENTION
• The present invention provides both methods and systems for deploying one or more needles in tissue. The needles are usually intended to deliver a therapy to the tissue, most typically being adapted to deliver radiofrequency, plasma, heat, or other energy to ablate or otherwise modify the tissue or a targeted anatomy within the tissue. In other embodiments of the present invention, however, particularly those relating to initial needle deployment, the needles could also be intended for biopsy or have other diagnostic purposes.
• One or more needles are deployed in tissue where the tissue is being imaged so that at least a portion of the needle (once deployed) and at least one anatomical feature within the tissue will be visible, preferably on a display screen in real time before, after, and/or during needle deployment. In a first specific aspect of the present invention, the image is overlaid with projected needle treatment information. By “projected,” it is meant that the needle treatment information is predicted or calculated based on known or determined system information. For example, the shape of the needle and mechanics of the needle deployment system may be used to predict the path that the needle may take into tissue, as described in greater detail below. The treatment volume and safety boundaries or margins may be calculated or predicted based on the energy delivery characteristics of the system together with the anticipated tissue characteristics. The information overlaid on the image will allow a user, typically a treating physician, to evaluate the predicted and/or actual needle positions relative to both treatment efficacy and safety.
• In the exemplary embodiments, at least one needle will be deployed from a probe where the probe may be introduced to the uterus or other body cavity or lumen. Exemplary anatomical features that may be imaged and subsequently treated or biopsied include fibroids, tumors, encapsulated tissue masses, pseudoencapsulated tissue masses, and the like. Of particular interest to the present invention, the probe may be positioned in the uterus and the needle deployed to a location proximate or into a fibroid located in the myometrium surrounding the uterus. In such cases, it will usually be desirable to also image the serosa which surrounds the myometrium and/or other sensitive anatomical features that could be damaged by the energy-mediated or other therapeutic treatment.
• Thus, in a first specific aspect of the present invention, the projected needle information will include at least a projected safety boundary which provides a visual image of the treatment volume that can be provided through the needle. In such cases, evaluating can comprise confirming that the serosa or other sensitive tissue or anatomical structure is outside of the projected safety boundary (where tissue within the projected safety boundary is at risk of tissue damage). The projected safety boundary will usually provide a minimum distance between the needle and the serosa or other sensitive anatomical feature which is at least 0.5 cm, often being at least 0.7 cm, and preferably being at least 1 cm.
• In a second specific aspect of the present invention, the projected needle treatment information will comprise a projected needle deployment path. The projected needle deployment path will typically find use prior to needle deployment where the treating physician can manipulate the probe which carries the needle so that the projected needle treatment path visible on the display screen is aligned so that the needle will enter or at least be reasonably close to the targeted anatomy to be treated. The projected needle treatment information will be based on the known mechanical characteristics of the needle and may vary for different needles. In some instances, it will be desirable to actually test individual needles which are being used so that their individual characteristics are known, but this will usually not be necessary. It will be appreciated that the actual needle entry path, while predictable within certain tolerances, may differ from the projected path due to differences in the tissue characteristics, small differences in the deployment mechanisms, differences in the needle characteristics, or other reasons. In such instances, the methods and systems of the present invention will allow for inputting the actual treatment position so that the safety and treatment boundaries can be predicted based on the actual needle position, not the predicted needle position. For example, the physician may locate a known point or artifact on the needle which appears in the visual image. By then “clicking on” that point or otherwise feeding that positional information back into the imaging and control system, the system can recalculate the actual needle position and, based on the actual position, calculate the safety and treatment boundaries.
• In a third specific aspect of the present invention, the projected needle treatment information comprises a projected therapy region. The projected therapy region will be a boundary or volume which is shown on the visual display to allow the treating physician to assess whether the target region to be treated will likely be effectively treated based on the needle position. As just discussed, usually the projected needle treatment information is preferably based on the actual needle position but could also be based on the projected needle position. Thus, it may be possible for the treating physician to rely on a projected therapy region (as well as a projected safety boundary) while the projected needle position is being manipulated relative to the targeted anatomy to be treated. After actual deployment, the system can recalculate both the projected therapy region and the projected safety boundary to allow the treating physician to confirm both that the treatment will likely be effective and that the serosa and/or other sensitive tissue structures will not be damaged.
• In a further specific aspect of the present invention, the treatment system will provide for an interlock or enablement step before treatment can be delivered to the tissue. For example, the system may require the treating physician to acknowledge that either or both of the safety boundary and treatment volumes have been observed and evaluated to determine that the treatment will be safe and/or effective. Without such acknowledgement, the system could preclude energy delivery until such time as the treating physician acknowledges evaluation of the safety and/or effectiveness. In other instances, the system could be modified to assess the projected boundaries relative to the targeted treatment anatomies and the sensitive tissue anatomy, although such fully automated systems are not presently preferred.
• The methods of the present invention will preferably employ the uterine fibroid treatment probes, such as those described in the commonly owned, copending applications incorporated herein by reference above. These treatment probes comprise a shaft having both an imaging transducer and a deployable needle near the distal end. The needle is configured so that it may be selectively advanced in a generally lateral direction within the field of image of the transducer, typically an ultrasonic imaging array. After the needle has been advanced into the tissue, and the safety and effectiveness of the needle position have been confirmed, therapy may be administered through the needle, such as radiofrequency tissue treatment or other energy or non-energy mediated treatments. Exemplary energy treatment modalities include radiofrequency, microwave, high intensity focused ultrasound (HIFU), liquid infusion, plasma infusion, vapor, cryotherapy, and the like.
• In another embodiment of the present invention, a needle is deployed in tissue by first positioning a probe having a deployable needle proximate a surface of the tissue. An image of the tissue is provided in real time, and a projected needle path is overlaid on the image. Prior to actually deploying the needle, the probe is repositioned to align the projected needle path on the real time image with anatomical feature. After the probe has been repositioned to optimize the position of the projected needle path within the anatomical feature, the needle may be deployed from the probe. After the needle has been actually deployed, the actual needle position may be fed back into the imaging system by marking a location on an image of the needle. Based on the actual needle position provided by the marked location, the projected safety boundary may be calculated by the system and overlaid on the image. Based on the projected safety boundary, the physician may visually confirm that sensitive anatomic structures are safe. Usually, the tissue image will also be overlaid with a projected treatment boundary based on the marked location. The physician may then also visually confirm that at least a portion of the anatomical feature to be treated is within the projected treatment boundary. The system may also be programmed so that the treatment device will be enabled only if the sensitive anatomic structures are outside of the safety boundary, typically by requiring the treating physician to acknowledge that the anatomical structures are safe.
• Systems for deploying needles in tissue in accordance with the principles of the present invention comprise a probe and a system controller. The probe includes one or more deployable needles and an imaging transducer, where the needle(s) is (are) configured to be advanced into an image field produced by the imaging transducer. The system controller includes a screen for displaying the image produced by the transducer, where the system controller provides for an overlay on the screen with projected needle treatment information. The projected needle treatment information may comprise a projected needle path, where the physician can manipulate the probe to align the projected needle path with a target anatomy in the image field visible on the screen. The needle information may further comprise a projected treatment boundary and/or projected safety boundary. In such instances, the system may require the physician to confirm that the projected or actual needle position is safe and/or effective prior to enabling a therapy. Usually, the system will be able to update the projected needle information based on the actual needle position. In exemplary systems, the system controller further includes a generator for producing a therapy to be delivered through the needle, such as a radiofrequency, microwave, high intensity focused ultrasound (HIFU), vapor, liquid infusion, and cryotherapy. Systems may employ needle arrays comprising multiple needles.
• Methods for treating fibroids and other anatomical features further comprise deploying at least one needle in the uterus proximate, usually within, the anatomical feature. The methods may deploy multiple needles in needle arrays. Radiofrequency energy is delivered into the feature through an exposed portion or portions of the needle, where no exposed needle portion is closer than 0.5 cm to the serosa, usually being no closer than 0.7 cm, and preferably being no closer than 1 cm. such methods can achieve effecting treatment of many or most fibroids or other features without damaging the serosa.
BRIEF DESCRIPTION OF THE DRAWINGS
• FIG. 1 is a schematic illustration of the system comprising a system controller and a needle treatment probe constructed in accordance with the principles of the present invention.FIGS. 1A and 1B illustrate schematics of a system constructed in accordance with the principles of the present invention.
• FIGS. 2 through 4 illustrate an exemplary needle treatment probe which may be used in the methods and systems of the present invention for the treatment of uterine fibroids.
• FIG. 5 is a flowchart illustrating an exemplary treatment protocol in accordance with the principles of the present invention.
• FIGS. 6A and 6B illustrate use of the needle treatment probe ofFIGS. 2 through 4 in the treatment of a uterine fibroid in accordance with the principles of the present invention.
• FIG. 7 illustrates exemplary dimensions for a treatment region and a safety boundary for the needle deployment probe ofFIGS. 2 through 4.
• FIGS. 8A through 8G illustrate exemplary images which might be viewed by a treating physician when deploying the needle deployment probe ofFIGS. 2 through 4 in treating a uterine fibroid generally as shown inFIGS. 6A and 6B.
DETAILED DESCRIPTION OF THE INVENTION
• As illustrated inFIG. 1, asystem10 constructed in accordance with the principles of the present invention includes both a system controller12 andtreatment probe14. The system controller12 will include a processing and power unit16 and a display screen18. The controller12 will further include means for the treating physician to input information, such as a keyboard, touch screen, control panel, or the like. The processing and power unit16 will usually include a radiofrequency, microwave, vapor, treatment plasma, or other circuitry or mechanisms for delivering the treatment energy or other treatment agents to thetreatment probe14. Conveniently, the system controller12 could comprise a conventional desktop or laptop computer to provide both the screen and logic and be connected to a separate radiofrequency, microwave, HIFU, liquid infusion, plasma infusion, vapor, cryotherapy or other source to provide the desired treatment. A switch, foot pedal, or other trigger (not shown) may be provided on or with the power unit16 in order to initiate delivery of RF or other energy through thetreatment probe14 in a generally conventional manner, as described in U.S. patent application No. Ser. No. 11/620,594, which is incorporated herein by reference.FIGS. 1A and 1B illustrate schematics of a system constructed in accordance with the principles of the present invention, as further described in U.S. Patent Publication No. 2006/0189972, which is incorporated herein by reference. The system comprises a combined ultrasound recognition andradiofrequency treatment system88. Thesystem88 may provide a variety of features including ultrasound mapping, ultrasound recognition of treatment area (e.g., tissue differentiation via temperature profiling), radiofrequency ablation treatment under ultrasound imaging, temperature monitoring, time monitoring, and/or impedance monitoring. Thesystem88 may be coupled tovarious devices90 described herein having single or multiple treatment needle configurations to ablate in either bipolar or monopolor modes. Thesystem88 may be coupled to various devices described herein having single or multiple treatment needle configurations to ablate in either bipolar or monopolar modes.
• Thetreatment probe14 typically includes ashaft20 having ahandle22 at its proximal end. Aneedle24 andimaging array26 are provided at the distal end of theshaft20, as described in more detail with reference toFIGS. 2 through 4. Thetreatment probe14 shown inFIGS. 2 through 4 is described in more detail in copending provisional application No. 60/938,140 , filed on May 15, 2007, the full disclosure of which has previously been incorporated herein by reference.
• Theprobe14 generally includes a rigid orother delivery shaft20, anultrasound imaging transducer26, and an echogeniccurved needle24 with an artifact/feature100 at a distal end51 (FIG. 3) thereof. As shown, the artifact is a corner cut type retroreflector. Thehandle22 is attached to aproximal end21 of theshaft20. Adistal end23 of theshaft20 has a bent or deflectable distal tip, as best seen inFIG. 4. Theultrasound imaging transducer26 comprises a linear ultrasound array disposed in a flat viewing window36 (FIG. 3) which images in a field of view46 (FIG. 4). The ultrasound beam provided by theultrasound imaging transducer26 can not only allow for identification of the fibroids, but can also serve to provide real-time visualization of needle anchoring and ablation treatment, as described in U.S. Patent Publication No. 2006/0189972, which is incorporated herein by reference. Although only a singlestraight needle24 is illustrated, the probe may carry multiple needles in arrays and/or the needles may be straight or have any other configuration.
• Theneedle24 is a solid tip electrically conductive needle intended for radiofrequency tissue ablation. As discussed elsewhere, it could also be intended for delivery of other forms of energy or be a hollow core needle intended for substance delivery or injection. Theexemplary needle24 generally comprises a two-piece construction including an elongate hollow body48 (as best seen inFIG. 3) and a soliddistal tip50 at a distal end thereof. Thedistal tip50 may be laser welded to the hollowtubular body48. Thesolid tip50 may also be attached via alternative means, for example adhesives or mechanical features or fits. Thehollow tube48 will generally have a length in a range from about20 cm to about45 cm. In some embodiments, the hollow tube will have an oval cross section having a thickness generally in a range from about 0.5 mm to about 2 mm and a wideness generally in a range from about 1 mm to about 3 mm. This flattened oval cross sectional shape, when present, is intended to inhibit lateral deflection during deployment or penetration of theneedle24.FIG. 3 also illustrates a representative laser cuthole60 within the distal end of thetubular body48 for the infusion of agents (e.g., electrolytes, drugs, etc.) so as to enhance the therapeutic effect of theneedle14 prior to or during ablation treatment. Theinfusion hole60 may be aligned on one side of thetubular body48 and generally has length in a range from about 0.5 mm to about 2 mm and a width in a range from about 0.5 mm to about 2 mm. It should be noted thathole60 may comprise one or a plurality of holes, and each may be used for a different purpose. The treatment needle or other elements (e.g., non-treatment needle, thermocouple) may additionally monitor tissue impedance and/or measure a tissue temperature so as to aid in diagnosis, blood Supply measurement, thermal signature, tissue targeting, and the like, as described in U.S. Patent Publication No. 2006/0189972, which is incorporated herein by reference.
• Thehandle22 further includes a longitudinallymovable slider72 for enabling the advancement and retraction of theneedle14 to and from within aneedle guide44. Theultrasound imaging transducer26 may optionally be present on an imaging insert replaceably disposed within the axial passage of theshaft20. A sealingelement30 may be provided between theultrasound imaging transducer26 and the shaft handle24 to ensure sufficient sealing around the insert at a proximal end. It will be appreciated that the above depictions are for illustrative purposes only and do not necessarily reflect the actual shape, size, or dimensions of thesystem10. Furthermore, the ultrasound array may be parallel to an axis of theshaft20 or may be slightly inclined as illustrated inFIG. 4. This applies to all depictions hereinafter. The array is typically a linear array with from16 to128 elements, usually having64 elements. The length (azimuth) of array12 usually ranges from about 5 mm to about 20 mm, normally being about 14 mm. The array may have a depth (elevation) ranging from about 1 mm to about 8 mm, normally being about 2 mm. In an embodiment, the ultrasound array transmits ultrasound waves at a center frequency ranging from about 2 MHz to about 15 MHz, typically from about 5 MHz to about 12 MHz, normally about 6.5 MHz.
• Referring now toFIG. 5, an exemplary protocol for performing the needle positioning methods of the present invention for treating uterine fibroids will be described. After theprobe14 is positioned in the uterus, the treating physician scans the myometrium M in order to locate fibroids F, as shown inFIG. 6A.Shaft20 is manipulated so that the field ofview46 of thetransducer array26 provides a visual image, such as that shown inFIG. 8A, on the screen18 of the system12. Once a fibroid F is located, the physician can scan the image for other anatomical features such as the treatment-sensitive serosa S, as also shown inFIG. 8A. It should be appreciated that the image being produced is “real time,” and that the image will change as the physician moves theshaft20 within the uterus U so that the field ofview46 scans over different portions of the myometrium.
• The next step in the protocol ofFIG. 5 relies on aligning a needle guide overlay with the fibroid. The needle guide may be a simple pair ofparallel lines70, as shown inFIG. 8B. Theparallel lines70 will typically represent the limits of the most likely lateral needle advancement path. Thus, by aligning thelines70 generally across the target fibroid F, as shown inFIG. 8C, the likelihood that the needle will be directed into the middle of the fibroid is increased.
• The treating physician continues to visually assess the position of theneedle guidelines70 relative to the fibroid F until they are acceptably aligned, as shown inFIG. 8C. The physician then advances the actual needle into the tissue as shown inFIG. 6B, where the image of the actual needle is shown inFIG. 8D. After the image of the actual position of the needle appears, the physician marks a preselected position on the needle, either by moving a curser on the image and clicking, touching the screen, or the like. Such “marking” of the actual position allows the system to calculate or recalculate a projected safety boundary and a projected therapy region. For example, the system may be marked near the tip of the needle, as shown at location80 onFIG. 8E.
• Referring now toFIG. 7, anexemplary safety boundary90 andtreatment region92 for a single needle fibroid ablation system will be described. Atreatment needle24 has anuninsulated treatment portion96 having a length l in the range from 1 cm to 3 cm, typically being 2 cm. The safety boundary will be an oval line which is generally a distance s from the exposed exterior of the treatingelectrode portion96. The distance s is usually in the range from 1 cm to 3 cm, typically being about 1.5 cm. A distance t between the exposedneedle portion96 and thetreatment region boundary92 will typically be about half that of the safety distance s, typically being in the range from 0.5 cm to 1.5 cm, usually being about 0.75 cm. Generally, the distance tt from the distal tip of theneedle24 and the safety boundary and the treatment region perimeter will be somewhat less because of the reduced energy density at the tip. Thus, the distance tt between the tip and the treatment region perimeter may be from 0.1 cm to 0.5 cm, usually being about 0.25 cm while the distance is between the tip and the safety boundary will be in the range from 0.5 cm to 1.5 cm, typically being about 1 cm.
• Based on these desired clearance distances, the system projects treatment and safety overlays on the actual image of theneedle24, as shown inFIG. 8F. The physician can then visually assess whether sensitive tissue structures, such as the serosa S remain outside of the projectedsafety boundary90. As shown inFIG. 8F, the serosa S is inside of thesafety boundary90, so it will be necessary to reposition or redeploy theneedle24 to move the serosa S beyond the safety boundary. It is noted that the position of thetreatment perimeter92 about the fibroid F is probably sufficient for treatment, but the needle needs to be deployed based on safety concerns.
• Once the needle has been repositioned or redeployed so that thetreatment region92 sufficiently covers the fibroid F while the safety boundary does not encroach upon the serosa S as shown inFIG. 8G, the physician will enable the system for treatment. Usually, the system will require the physician to acknowledge that the needle has been properly positioned before allowing the system to power the needle. Once that is done, the physician can initiate treatment, as described generally in the prior applications which have been incorporated herein by reference. For instance, bipolar radiofrequency current may be delivered between two adjacent needles, or monopolar current between a single needle and a distant dispersive electrode affixed to the thigh or back, as described in U.S. Patent Publication No. 2006/0189972, which is incorporated herein by reference.
• While the above is a complete description of the preferred embodiments of the invention, various alternatives, modifications, and equivalents may be used. Therefore, the above description should not be taken as limiting the scope of the invention which is defined by the appended claims.

Claims (10)

1. (canceled)

2. A system for use during a surgical procedure, the system comprising:

an ablation device comprising an array of multiple needles configured for conducting radiofrequency (RF) energy;

a controller; and

a first imaging device comprising an ultrasound probe, the first imaging device configured to be positioned in contact with an organ or other tissue structure within a patient, wherein the ultrasound probe is configured to provide an ultrasound image of an internal region of the organ or other tissue structure,

wherein the ultrasound probe and the ablation device are moveable independent of each other, and

wherein the controller is configured to generate visual information regarding a position of the ablation device, and to overlay the visual information regarding a position of the ablation device over the ultrasound image provided by the ultrasound probe.

3. The system ofclaim 2, wherein the system is configured to deliver RF energy to the array of multiple needles of the ablation device sufficient to ablate a tissue mass within the patient, wherein the array of multiple needles are configured to be deployed within the tissue mass.

4. The system ofclaim 3, further comprising a foot pedal actuatable to deliver RF energy to the array of multiple needles.

5. The system ofclaim 4, wherein the system is configured to conduct RF energy from the array of multiple needles, through the tissue mass, to a dispersive electrode affixed to the patient's thigh.

6. The system ofclaim 2, further comprising a graphical user interface.

7. The system ofclaim 6, wherein the graphical user interface is configured to display fibroid data.

8. The system ofclaim 7, wherein the fibroid data comprises a numbered identification of fibroids at different positions on a map.

9. The system ofclaim 6, wherein the graphical user interface displays one or more of a temperature and an impedance.

10. The system ofclaim 4, wherein the system is configured to deliver RF energy to the tissue mass while monitoring a tissue temperature.

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