JP5836071B2 - Ultrasonic probe and ultrasonic diagnostic apparatus - Google Patents

Description

  Embodiments described herein relate generally to an ultrasonic probe and an ultrasonic diagnostic apparatus.

  The ultrasonic diagnostic apparatus radiates an ultrasonic pulse generated from a vibration element provided in an ultrasonic probe into a subject, and receives an ultrasonic reflected wave generated by a difference in acoustic impedance of the subject tissue by the vibration element. To collect biological information. In addition, since an ultrasonic diagnostic apparatus can display ultrasonic image data in real time with a simple operation by simply contacting an ultrasonic probe, it is widely used for morphological diagnosis and functional diagnosis of various organs.

  For example, an ultrasonic diagnostic apparatus is often used when punctures such as a biological tissue examination or radiofrequency ablation (RFA) are performed. When collecting a tissue for a biological tissue examination, a doctor punctures the body with a puncture needle while confirming a target lesion with an ultrasonic image in real time, and collects the tissue. In addition, when performing RFA, a doctor punctures an RFA needle to a lesion site while confirming a target lesion with an ultrasonic image in real time, and then radiates radio waves from the RFA needle.

  For example, in a procedure using such an ultrasonic diagnostic apparatus, in order to accurately grasp the position of the puncture needle or the RFA needle, an entry range of the puncture needle is limited by an attachment, or a 2D array probe (two dimensional array probe) is used. ), And the position of the puncture needle and the target part are specified using three-dimensional data collected using a mechanical four dimensional probe. In recent years, an ultrasonic probe for generating a two-dimensional ultrasonic image in an ultrasonic probe group of a conventional mechanical 4D probe in order to grasp the positions of a puncture needle and an RFA needle more accurately. A mechanical 4D probe to which a child group is newly added is also known. However, in the above-described prior art, when trying to obtain a wide range of ultrasonic images with high accuracy at the time of puncturing, the ultrasonic probe is increased in size and the operability may be reduced.

JP 11-56851 A

  The problem to be solved by the present invention is to provide an ultrasonic probe and an ultrasonic diagnostic apparatus capable of obtaining a wide range of ultrasonic images with high accuracy at the time of puncturing, and capable of suppressing deterioration in operability. is there.

The ultrasonic probe according to the embodiment includes a first ultrasonic probe group and a second ultrasonic probe group. The first ultrasonic probe group is swung in a direction orthogonal to the arrangement direction while scanning a surface parallel to the arrangement direction of the ultrasonic probes, thereby moving the subject in three dimensions. A plurality of ultrasonic probes to be scanned are arranged one-dimensionally. In the second ultrasonic probe group, a plurality of ultrasonic probes that scan any one of the plurality of scanning surfaces scanned by the first ultrasonic probe group are one-dimensional. Ordered. The second ultrasonic probe group is swung in a direction orthogonal to the arrangement direction of the ultrasonic probes in the second ultrasonic probe group and fixed at an arbitrary position.

FIG. 1A is a cross-sectional view showing an example of the configuration of an ultrasonic probe according to the first prior art. FIG. 1B is a cross-sectional view of the ultrasonic probe shown in FIG. 1A. FIG. 1C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 1A. FIG. 2 is a diagram illustrating an example of an ultrasound probe group in the ultrasound probe according to the second prior art. FIG. 3A is a cross-sectional view showing an example of the configuration of the ultrasonic probe according to the first embodiment. 3B is a cross-sectional view of the ultrasonic probe shown in FIG. 3A. FIG. 3C is a diagram illustrating an arrangement direction of the ultrasound probes according to the first embodiment. FIG. 3D is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 3A. FIG. 4A is a cross-sectional view showing an example of the configuration of an ultrasonic probe according to the second embodiment. 4B is a cross-sectional view of the ultrasonic probe shown in FIG. 4A. FIG. 4C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 4A. FIG. 5A is a cross-sectional view showing an example of the configuration of an ultrasonic probe according to the third embodiment. FIG. 5B is a cross-sectional view of the ultrasonic probe shown in FIG. 5A. FIG. 5C is a diagram showing an ultrasound image generated using the ultrasound probe of FIG. 5A. FIG. 6A is a cross-sectional view showing an example of the configuration of an ultrasonic probe according to the fourth embodiment. 6B is a cross-sectional view of the ultrasonic probe shown in FIG. 6A. FIG. 6C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 6A. FIG. 7A is a cross-sectional view showing an example of the configuration of an ultrasonic probe according to the fifth embodiment. FIG. 7B is a cross-sectional view of the ultrasonic probe shown in FIG. 7A. FIG. 7C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 7A. FIG. 8A is a cross-sectional view showing an example of the configuration of an ultrasonic probe according to the sixth embodiment. FIG. 8B is a first cross-sectional view of the ultrasonic probe shown in FIG. 8A. FIG. 8C is a second cross-sectional view of the ultrasonic probe shown in FIG. 8A. FIG. 8D is a diagram showing an ultrasound image generated using the ultrasound probe of FIG. 8A. FIG. 9 is a diagram illustrating an example of the overall configuration of the ultrasonic diagnostic apparatus according to the present embodiment.

(First embodiment)
First, a conventional ultrasonic probe will be described with reference to FIGS. 1A to 2. FIG. 1A is a cross-sectional view showing an example of the configuration of an ultrasonic probe 100 according to the first conventional technique. FIG. 1A shows a mechanical 4D probe that three-dimensionally transmits and receives ultrasonic waves by mechanically swinging a group of ultrasonic probes arranged one-dimensionally. As shown in FIG. 1A, the ultrasonic probe 100 according to the first conventional technique includes a wiring 110, a wiring 120, an ultrasonic probe group 130, a swing mechanism 140, and a driving device 150. As shown in FIG. 1A, it is used for puncture with respect to a target site T in a subject P.

  The wiring 110 transmits a signal between the piezoelectric body constituting the ultrasonic probe included in the ultrasonic probe group 130 and the ultrasonic diagnostic apparatus main body. The wiring 120 transmits a control signal and electric power for controlling the driving machine 150 with the ultrasonic diagnostic apparatus main body. The ultrasound probe group 130 transmits and receives ultrasound signals to and from the subject P. The rocking mechanism 140 mechanically rocks the ultrasonic probe group 130. The driving machine 150 drives the swing mechanism 140.

  Here, the ultrasonic probe group 130 includes ultrasonic probes arranged in a one-dimensional array. That is, the ultrasonic probe group 130 is configured by ultrasonic probes arranged one-dimensionally in the horizontal direction of FIG. 1A. Then, the ultrasonic probe 100 electronically scans the ultrasonic probe in the arrangement direction of the ultrasonic probes based on the signal transmitted through the wiring 120, as shown in FIG. 1A. Two-dimensional ultrasonic image information is acquired in real time.

  In addition, the ultrasonic probe 100 acquires information of a three-dimensional ultrasonic image in real time by swinging the ultrasonic probe group 130 in the arrangement direction of the ultrasonic probes. FIG. 1B is a cross-sectional view of the ultrasonic probe shown in FIG. 1A. 1B is a cross-sectional view taken along the line ab shown in FIG. 1A. For example, while the ultrasound probe 100 electronically scans the ultrasound probe group 130, the ultrasound probe group 130 is orthogonal to the arrangement direction of the ultrasound probes as indicated by arrows in FIG. 1B. The information of the three-dimensional ultrasonic image is acquired in real time by swinging in a curved shape in the direction to be performed.

  The ultrasonic probe 100 is used for puncture in which a puncture needle or the like is inserted into a subject for collection of a living tissue or treatment of an affected part of the living body. In such a puncture operation, in order to improve safety, the puncture operator inserts a puncture needle or the like into the living body while referring to an ultrasonic image of the living body including a range where the puncture needle or the like is inserted into the living body. To do. That is, the puncture operator confirms the position of the puncture needle or the like in the living body in real time with reference to the ultrasonic image.

  FIG. 1C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 1A. FIG. 1C shows a three-dimensional ultrasonic image generated based on information acquired while swinging the ultrasonic probe group 130. As shown in FIG. 1C, in the three-dimensional ultrasonic image, the target site T and the puncture needle guide are depicted, and the puncture person performs puncture while confirming the position of the puncture needle from this image.

  Here, in order to more accurately grasp the position of the puncture needle, in order to obtain a higher-definition three-dimensional ultrasound image using the ultrasound probe 100, the ultrasound arrayed in a one-dimensional array is used. A technique for increasing the density of scanning lines in the arrangement direction of the acoustic probes 130 or a technique for increasing the density of scanning lines in the oscillating direction by reducing the mechanical oscillation speed is effective. However, the method of increasing the density of the scanning lines decreases the time response of the three-dimensional ultrasonic image. That is, when the frame rate is lowered and the operation speed of the puncture needle is high, it is difficult to generate an ultrasonic image following the operation.

  Further, in order to obtain a wide range of information while ensuring the accuracy of the three-dimensional ultrasonic image, the scanning range is increased by enlarging the length of the ultrasonic probe group 130 in the arrangement direction of the ultrasonic probes. A method for enlarging the range of swinging while keeping the mechanical swinging speed constant is effective. However, the method of enlarging the range generates an ultrasonic image following the operation when the frame rate is reduced and the operation speed of the puncture needle is high, as in the method of increasing the scanning line density described above. It becomes difficult.

  Therefore, in order to generate a high-definition three-dimensional ultrasonic image without lowering the followability to the operation of the puncture needle due to a decrease in the frame rate, a two-dimensional ultrasonic probe group of the mechanical 4D probe is used. A mechanical 4D probe to which a group of ultrasonic probes for generating a typical ultrasonic image is newly added is known. FIG. 2 is a diagram illustrating an example of an ultrasound probe group in the ultrasound probe according to the second prior art.

  In the ultrasonic probe according to the second prior art, as shown in FIG. 2, in addition to the ultrasonic probe group 130 that transmits and receives ultrasonic waves three-dimensionally, the ultrasonic probe of the ultrasonic probe group 130 is used. An ultrasonic probe 161 is arranged in a direction orthogonal to the arrangement direction of the probes 131, and includes an ultrasonic probe group 160 that scans two-dimensionally. That is, the ultrasonic probe shown in FIG. 2 is arranged so that the scanning surface 130a of the ultrasonic probe group 130 and the scanning surface 160a of the ultrasonic probe group 160 are orthogonal to each other.

  Based on the ultrasonic waves transmitted and received by the ultrasonic probe group 160, an ultrasonic image depicting the puncture needle is generated. At this time, a puncture needle mounting device for guiding the puncture needle is used so that the puncture needle is inserted into the scanning surface 160a of the ultrasound probe group 160. As described above, the second conventional technique follows the operation of the puncture needle by the ultrasonic probe group that scans two-dimensionally, so that even if the scanning line density is increased, the operation speed is increased. It is possible to generate an ultrasonic image that follows the operation of a quick puncture needle.

  However, in the ultrasonic probe according to the second prior art, when a three-dimensional ultrasonic image is to be generated over a wide range, the use method is limited, and the operability is lowered. That is, in the ultrasonic probe according to the second prior art, information of a two-dimensional ultrasonic image is obtained in a direction orthogonal to the arrangement direction of the ultrasonic probes for obtaining information of a three-dimensional ultrasonic image. When the ultrasonic probe is arranged, the outer dimensions of the acoustic radiation surface of the ultrasonic probe in the direction orthogonal to the arrangement direction of the ultrasonic probes for obtaining information of a three-dimensional ultrasonic image are Due to the increase in size, operability is reduced.

  For example, since the ultrasonic probe according to the second prior art is enlarged, it is difficult to insert the ultrasonic probe into a narrow region such as a body cavity. Further, in the ultrasonic probe according to the second prior art, for example, the ultrasonic probe becomes T-shaped, and the contact property of the ultrasonic radiation surface of the ultrasonic probe to the living body is lowered, so that the operability is improved. descend.

  Therefore, the ultrasonic probe according to the first embodiment can obtain a wide range of ultrasonic images with high accuracy at the time of puncturing, and can suppress a decrease in operability. Hereinafter, the ultrasonic probe according to the first embodiment will be described with reference to FIGS.

  FIG. 3A is a cross-sectional view illustrating an example of the configuration of the ultrasonic probe 10 according to the first embodiment. In FIG. 3A, the state used for the puncture with respect to the target site | part T in the subject P is shown. As shown in FIG. 3A, the ultrasonic probe 10 according to the first embodiment includes a wiring 11, a wiring 12, a wiring 13, a first ultrasonic probe group 14, a swing mechanism 15, A driving machine 16 and a second ultrasonic probe group 17 are provided.

  The wiring 11 transmits a signal between the piezoelectric body constituting the ultrasonic probe included in the first ultrasonic probe group 14 and the ultrasonic diagnostic apparatus main body. The wiring 12 transmits a control signal and power for controlling the drive unit 16 with the ultrasonic diagnostic apparatus main body. The wiring 13 transmits a signal between the piezoelectric body constituting the ultrasonic probe included in the second ultrasonic probe group 17 and the ultrasonic diagnostic apparatus main body.

  The first ultrasonic probe group 14 swings in a direction orthogonal to the arrangement direction while scanning a plane parallel to the arrangement direction of the ultrasonic probes, thereby three-dimensionally moving the subject. A plurality of ultrasonic probes to be scanned are arranged one-dimensionally. Specifically, the first ultrasonic probe group 14 converts a signal transmitted via the wiring 11 into an ultrasonic wave, and transmits the converted ultrasonic wave to the subject. The first ultrasonic probe group 14 receives the reflected wave and converts the received ultrasonic wave into an electrical signal. The first ultrasonic probe group 14 swings in a direction orthogonal to the arrangement direction of the ultrasonic probes while performing the transmission / reception of the ultrasonic waves described above.

  3B is a cross-sectional view of the ultrasonic probe shown in FIG. 3A. 3B is a cross-sectional view taken along the line AA shown in FIG. 3A. For example, the first ultrasonic probe group 14 swings in a curved shape in a direction orthogonal to the arrangement direction of the ultrasonic probes as indicated by an arrow in FIG. 3B. Here, the first ultrasonic probe group 14 may be a convex type or a linear type.

  The oscillating mechanism 15 mechanically oscillates the first ultrasonic probe group 14. Specifically, the swing mechanism 15 swings the first ultrasonic probe group 14 in a direction orthogonal to the arrangement direction of the ultrasonic probes using a drive force from a drive unit 16 described later. The first ultrasonic probe group 14 is swung by being converted into The driving machine 16 drives the swing mechanism 15. For example, the driving machine 16 is a motor or the like.

  The second ultrasonic probe group 17 includes one ultrasonic probe that scans any one of the plurality of scanning surfaces scanned by the first ultrasonic probe group 14. Dimensionally arranged. Specifically, in the second ultrasonic probe group 17, the arrangement direction of the ultrasonic probes in the second ultrasonic probe group 17 is the same as that in the first ultrasonic probe group 14. It arrange | positions so that it may become substantially parallel to the sequence direction of a sound probe. That is, the scanning surface 17a of the second ultrasonic probe group 17 is parallel to the scanning surface 14a of the first ultrasonic probe group 14, as shown in FIG. 3A.

  FIG. 3C is a diagram illustrating an arrangement direction of the ultrasound probes according to the first embodiment. In FIG. 3C, the ultrasonic probe group included in the cross section between BB of FIG. 3A is shown. For example, the arrangement direction of the ultrasound probes 17b in the second ultrasound probe group 17 is such that the arrangement of the ultrasound probes 14b in the first ultrasound probe group 14 is as shown in FIG. 3C. The second ultrasonic probe group 17 is arranged so as to be the same as the direction.

  Then, the second ultrasonic probe group 17 converts the signal transmitted via the wiring 13 into an ultrasonic wave, and transmits the converted ultrasonic wave to the subject. The second ultrasonic probe group 17 receives the reflected wave and converts the received ultrasonic wave into an electrical signal. The second ultrasonic probe group 17 may be a convex type or a linear type.

  Here, in the ultrasonic probe 10 according to the first embodiment, the distance between the ultrasonic probes 14 b in the first ultrasonic probe group 14 and the second ultrasonic probe group 17. The distance between the ultrasonic probes 17b is substantially the same. Further, in the ultrasonic probe 10 according to the first embodiment, the width in the direction orthogonal to the arrangement direction of the first ultrasonic probe group 14 and the arrangement direction of the second ultrasonic probe group 17. And the width in the direction orthogonal to are substantially the same.

  The puncture needle 200 can be guided to the transmission / reception range of a two-dimensional ultrasonic signal by the second ultrasonic probe group 17 using a puncture needle mounting device for guiding the puncture needle 200 to a predetermined position. In this manner, the puncture needle may be inserted by attaching the ultrasonic probe 10 to a predetermined position. Alternatively, a groove, a hole, or the like for guiding the puncture needle 200 is formed in the ultrasonic probe 10 in a transmission / reception range of a two-dimensional ultrasonic signal by the second ultrasonic probe group 17, and Insertion may be performed.

  Further, the ultrasonic probes constituting both or one of the first ultrasonic probe group 14 and the second ultrasonic probe group 17 may be arranged in a curved and one-dimensional array. Good. FIG. 3D is a diagram illustrating an ultrasonic image generated using the ultrasonic probe 10 of FIG. 3A. As shown in FIG. 3D, by using the ultrasonic probe 10, a three-dimensional image based on the ultrasonic waves transmitted and received by the first ultrasonic probe group 14 and the second ultrasonic probe group 17 are used. Can generate a two-dimensional image based on ultrasonic waves transmitted and received.

  That is, as shown in FIG. 3D, a three-dimensional image that three-dimensionally represents the target site T and its peripheral region and a two-dimensional image that includes the puncture needle image 201 can be generated. Here, as shown in FIG. 3D, a puncture needle marker 202 for guiding the puncture needle 200 can be displayed on each of the three-dimensional image and the two-dimensional image. Furthermore, it is possible to combine a three-dimensional image and a two-dimensional image. Note that the puncture needle marker 202 shown in FIG. 3D is merely an example, for example, two linear forms indicating a range for guiding the puncture needle, a cylindrical form indicating the range for guiding the puncture needle, or The form which shows the range which guides other puncture needles may be sufficient.

  As described above, according to the first embodiment, the first ultrasonic probe group 14 has a plurality of ultrasonic probes arranged one-dimensionally and scans a plane parallel to the arrangement direction. However, the subject is three-dimensionally scanned by swinging in a direction orthogonal to the arrangement direction. The second ultrasonic probe group 17 includes a plurality of ultrasonic probes arranged in a one-dimensional manner and scanned by the first ultrasonic probe group 14. One of the scanning planes is scanned. Therefore, the ultrasonic probe 10 according to the first embodiment can obtain a wide range of ultrasonic images with high accuracy at the time of puncturing, and can suppress a decrease in operability.

  For example, in the ultrasonic probe 10 according to the first embodiment, the second ultrasonic probe group 17 that transmits and receives ultrasonic waves two-dimensionally is scanned by the first ultrasonic probe group 14. Even if a wide range of three-dimensional ultrasonic images are obtained by scanning one of the scanning planes, the acoustic radiation surface of the ultrasonic probe in the direction orthogonal to the arrangement direction of the ultrasonic probes is obtained. The outer dimensions are not increased. Therefore, the ultrasonic probe can be easily inserted into a narrow region such as a body cavity. Further, the ultrasonic probe does not become T-shaped, and the contact property of the ultrasonic radiation surface of the ultrasonic probe with the living body does not deteriorate.

  In addition, according to the first embodiment, the second ultrasonic probe group 17 is arranged such that the arrangement direction of the ultrasonic probes in the second ultrasonic probe group 17 is the first ultrasonic wave. They are arranged so as to be substantially parallel to the arrangement direction of the ultrasonic probes in the probe group 14. Therefore, the ultrasonic probe 10 according to the first embodiment can be realized with almost no change in the form of the existing ultrasonic probe.

  Further, according to the first embodiment, the distance between the ultrasonic probes in the first ultrasonic probe group 14 and the distance between the ultrasonic probes in the second ultrasonic probe group 17 are as follows. The distance is substantially the same. Therefore, the ultrasonic probe 10 according to the first embodiment can similarly control the transmission and reception of ultrasonic waves in each of the first ultrasonic probe group 14 and the second ultrasonic probe group 17. To.

  In addition, according to the first embodiment, the width in the direction orthogonal to the arrangement direction of the first ultrasonic probe group 14 and the direction orthogonal to the arrangement direction of the second ultrasonic probe group 17 are set. The width is substantially the same. Therefore, the ultrasonic probe 10 according to the first embodiment makes it possible to match the outer dimensions of the acoustic radiation surface of the ultrasonic probe in the direction orthogonal to the arrangement direction of the ultrasonic probes.

  In addition, according to the first embodiment, a puncture needle mounting mechanism for guiding a puncture needle to the scanning surface of the second ultrasonic probe group 14 or a mounting mechanism for mounting a puncture needle guide device is provided. Therefore, the ultrasonic probe 10 according to the first embodiment enables the puncture needle to be reliably depicted in a two-dimensional image.

(Second Embodiment)
In the first embodiment described above, the case where the second ultrasonic probe group 17 is fixed has been described. In the second embodiment, a case where the second ultrasonic probe group 17 swings will be described.

  FIG. 4A is a cross-sectional view showing an example of the configuration of an ultrasonic probe 10a according to the second embodiment. In FIG. 4A, the state used for the puncture with respect to the target site | part T in the subject P is shown. Here, the ultrasonic probe 10a according to the second embodiment has a new oscillating mechanism 15a and a driving device 16a as compared with the ultrasonic probe 10 according to the first embodiment, The functions of the ultrasonic probe group 17 are different. Hereinafter, these will be mainly described.

  The rocking mechanism 15a mechanically rocks the second ultrasonic probe group 17. Specifically, the swing mechanism 15a drives a drive force by a drive unit 16a described later to drive the second ultrasonic probe group 17 in a direction orthogonal to the direction in which the ultrasonic probes are arranged. The second ultrasonic probe group 17 is oscillated by transmitting it to. The drive device 16a drives the swing mechanism 15a. For example, the driving machine 16a is a motor or the like.

  The second ultrasonic probe group 17 swings in a direction perpendicular to the arrangement direction of the ultrasonic probes in the second ultrasonic probe group and is fixed at an arbitrary position. 4B is a cross-sectional view taken along line AA of the ultrasonic probe shown in FIG. 4A. For example, the second ultrasonic probe group 17 according to the second embodiment swings in a direction orthogonal to the arrangement direction of the ultrasonic probes and is fixed at an arbitrary position as shown in FIG. 4B. Is done. For example, the second ultrasonic probe group 17 swings according to the position where the puncture needle 200 is inserted, and is fixed at a position where the puncture needle 200 is within the range of the scanning plane.

  FIG. 4C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 4A. For example, the ultrasonic diagnostic apparatus uses the ultrasonic probe 10a, and as shown in FIG. 4C, a three-dimensional image based on ultrasonic waves transmitted and received by the first ultrasonic probe group 14, and the second The two-dimensional image including the puncture needle 201 based on the ultrasonic waves transmitted and received by the ultrasonic probe group 17 can be generated and further synthesized.

  Here, in the ultrasonic probe 10a according to the second embodiment, even when the puncture needle 200 is not inserted into the scanning surface 17a of the second ultrasonic probe group 17, the second ultrasonic probe is used. The tentacle group 17 can be swung so that the puncture needle 200 can be reliably depicted in the two-dimensional image. When the fixed position of the second ultrasonic probe group 17 is changed, the puncture needle displayed on the 3D image, the 2D image, and the image obtained by combining the 3D image and the 2D image is displayed. The display position of the puncture marker for guidance is changed corresponding to the change in the fixed position of the second ultrasonic probe group 17.

  As described above, according to the second embodiment, the second ultrasonic probe group 17 is arranged in a direction orthogonal to the arrangement direction of the ultrasonic probes in the second ultrasonic probe group. It swings and is fixed at an arbitrary position. Therefore, the ultrasonic probe 10a according to the second embodiment can flexibly correspond to the insertion position of the puncture needle 200.

(Third embodiment)
In the first and second embodiments described above, the second ultrasonic probe group 17 is arranged in the arrangement direction of the ultrasonic probes of the first ultrasonic probe group 14. explained. In the third embodiment, a case will be described in which the second ultrasonic probe group 17 is arranged on the surface side facing the acoustic radiation surface of the first ultrasonic probe group 14.

  FIG. 5A is a cross-sectional view showing an example of the configuration of an ultrasonic probe 10b according to the third embodiment. In FIG. 5A, the state used for the puncture with respect to the target site | part T in the subject P is shown. Here, the ultrasonic probe 10b according to the third embodiment differs from the ultrasonic probe 10 according to the first embodiment in the arrangement of the second ultrasonic probe group 17. Hereinafter, these will be mainly described.

  The second ultrasonic probe group 17 is arranged on the surface side facing the acoustic radiation surface in the first ultrasonic probe group 14, and ultrasonic waves generated by the second ultrasonic probe group 17 are transmitted. Transmission / reception is executed on condition that the first ultrasonic probe group 14 is not located in the vicinity of the ultrasonic scanning surface. FIG. 5B is a cross-sectional view taken along the line AA of the ultrasonic probe 10b shown in FIG. 5A. For example, the second ultrasonic probe group 17 according to the third embodiment is disposed on the upper side of the first ultrasonic probe group 14 as shown in FIG. 5B. When the first ultrasonic probe group 14 has swung near the front of the acoustic radiation surface of the second ultrasonic probe group 17, the second ultrasonic probe group 17. Stops sending and receiving ultrasound.

  FIG. 5C is a diagram showing an ultrasound image generated using the ultrasound probe of FIG. 5A. As shown in FIG. 5C, by using the ultrasonic probe 10b, a three-dimensional image based on ultrasonic waves transmitted and received by the first ultrasonic probe group 14 and the second ultrasonic probe group 17 are used. Can generate a composite image having a large degree of overlap with a two-dimensional image based on ultrasound transmitted and received.

  As described above, according to the third embodiment, the second ultrasonic probe group 17 is arranged on the surface side facing the acoustic radiation surface in the first ultrasonic probe group 14, and Transmission / reception of ultrasonic waves by the second ultrasonic probe group 17 is executed on condition that the first ultrasonic probe group 14 is not located in the vicinity of the ultrasonic scanning plane. Therefore, the ultrasonic probe 10b according to the third embodiment can reduce the size of the ultrasonic probe and can synthesize an image having a large degree of superimposition of the three-dimensional image and the two-dimensional image.

(Fourth embodiment)
In the above-described second embodiment, the case where the swing of the first ultrasonic probe group 14 and the swing of the second ultrasonic probe group 17 are controlled separately has been described. In the fourth embodiment, a case will be described in which the swing of the first ultrasonic probe group 14 and the swing of the second ultrasonic probe group 17 are controlled in synchronization.

  FIG. 6A is a cross-sectional view showing an example of the configuration of an ultrasonic probe 10c according to the fourth embodiment. In FIG. 6A, the state used for the puncture with respect to the target site | part T in the subject P is shown. Here, the ultrasonic probe 10c according to the fourth embodiment is newly provided with a driving force transmission shaft 18 and a driving force transmission clutch 19 as compared with the ultrasonic probe 10 according to the first embodiment. Is different. Hereinafter, these will be mainly described.

  The driving force transmission shaft 18 connects the rocking mechanism 15 and the second ultrasonic probe group 17, and transmits the driving force of the driving machine 16 transmitted through the rocking mechanism 15 to the second ultrasonic probe. It is transmitted to the tactile group 17 and swung. As shown in FIG. 6A, the driving force transmission clutch 19 controls transmission of driving force to the second ultrasonic probe group 17 of the driving force transmission shaft 18. Specifically, the driving force transmission clutch 19 transmits the driving force to the second ultrasonic probe group 17 by connecting the driving force transmission shaft 18 and the second ultrasonic probe group 17. Let The driving force transmission clutch 19 inhibits the transmission of the driving force to the second ultrasonic probe group 17 by releasing the driving force transmission shaft 18 and the second ultrasonic probe group 17. To do.

  6B is a cross-sectional view taken along line AA of the ultrasonic probe 10b shown in FIG. 6A. For example, in a state where the driving force transmission clutch is released and the driving force is not transmitted to the second ultrasonic probe group 17 by the driving machine 16, the second ultrasonic probe group 17 is in a predetermined position. It is fixed. On the other hand, in the state where the driving force transmission clutch is connected and the driving force is transmitted to the second ultrasonic probe group 17 by the driving machine 16, the first ultrasonic probe group 14 and the first ultrasonic probe group 14 are connected to the second ultrasonic probe group 17. The two ultrasonic probe groups 17 are mechanically oscillated synchronously.

  FIG. 6C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 6A. As shown in FIG. 6C, by using the ultrasonic probe 10c, a three-dimensional image based on the ultrasonic waves transmitted and received by the first ultrasonic probe group 14 and the second ultrasonic probe group 17 are used. A composite image with a two-dimensional image based on ultrasonic waves transmitted and received can be generated.

  As described above, according to the fourth embodiment, the driving force transmission clutch 19 connects the driving force transmission shaft 18 and the second ultrasonic probe group 17 so that the second ultrasonic probe is connected. The driving force is transmitted to the touch element group 17. The driving force transmission clutch 19 inhibits the transmission of the driving force to the second ultrasonic probe group 17 by releasing the driving force transmission shaft 18 and the second ultrasonic probe group 17. To do. Therefore, the ultrasonic probe 10c according to the fourth embodiment can control the swing of the second ultrasonic probe group 17 in the same manner as the first ultrasonic probe 14, and temporarily punctures it. It is possible to flexibly cope with the case where the insertion direction of the puncture needle changes during the operation.

(Fifth embodiment)
In the first to fourth embodiments described above, the case where the ultrasonic probe used on the body surface is used has been described. In the fifth embodiment, a case where the present invention is applied to an ultrasonic probe inserted into a narrow region such as a body cavity will be described.

  FIG. 7A is a cross-sectional view showing an example of the configuration of an ultrasonic probe 10d according to the fifth embodiment. In FIG. 7A, the state used for the puncture with respect to the target site | part T in a subject is shown. Here, the ultrasonic probe 10d according to the fifth embodiment is different from the ultrasonic probes 10 to 10c according to the first to fourth embodiments in the form of the ultrasonic probe and the second ultrasonic probe. The arrangement method of the group 17 is different. Hereinafter, these will be mainly described.

  As shown in FIG. 7A, the ultrasonic probe 10d according to the fifth embodiment has a dome-shaped tip, and is inserted from this tip into a narrow region such as a body cavity. Then, after being inserted into the body cavity, the puncture needle 200 inserted through the puncture needle guide groove 210 is depicted based on the ultrasonic waves transmitted and received by the second ultrasonic probe group 17.

  Here, the second ultrasonic probe group 17 according to the fifth embodiment is arranged to be inclined toward the center of the first ultrasonic probe group 14 as shown in FIG. 7A. In other words, the second ultrasonic probe group 17 is disposed at a predetermined angle so as to increase the overlapping area of the first ultrasonic probe group 14 with the scanning surface. Note that the angle at which the second ultrasonic probe group 17 is tilted can be arbitrarily determined, but the ultrasonic waves transmitted and received by the second ultrasonic probe group 17 are the first ultrasonic probe. It is tilted so as not to hit the child group 14.

  FIG. 7B is a cross-sectional view taken along the line AA of the ultrasonic probe 10b shown in FIG. 7A. In the ultrasonic probe 10d inserted in a narrow region such as a body cavity, the swing angle of the first ultrasonic probe 14 is large, and as shown in FIG. 7B, the region of about 180 ° can be scanned. Is possible.

  FIG. 7C is a diagram illustrating an ultrasonic image generated using the ultrasonic probe of FIG. 7A. As shown in FIG. 7C, by using the ultrasonic probe 10d, the present invention can be applied to an ultrasonic probe inserted into a narrow region such as a body cavity, and the first ultrasonic probe group 14 has a wider range. It is possible to generate a composite image of a three-dimensional image based on the ultrasonic waves transmitted and received and the two-dimensional image based on the ultrasonic waves transmitted and received by the second ultrasonic probe group 17. Note that the example illustrated in FIG. 7A is merely an example, and a plurality of puncture needle guide grooves may be provided. Further, the arrangement of the puncture needle guide groove may be variable.

  As described above, according to the fifth embodiment, the second ultrasonic probe group 17 is arranged to be inclined in the direction of the center of the first ultrasonic probe group 14. Therefore, the ultrasonic probe 10d according to the fifth embodiment makes it possible to synthesize an image with a large degree of superimposition of the three-dimensional image and the two-dimensional image.

(Sixth embodiment)
In the first to fifth embodiments described above, the case where only one second ultrasonic probe group 17 is provided has been described. In the sixth embodiment, a case where a plurality of second ultrasonic probe groups 17 are provided in one ultrasonic probe will be described.

  FIG. 8A is a cross-sectional view showing an example of the configuration of an ultrasonic probe 10e according to the fifth embodiment. In FIG. 8A, the state used for the puncture with respect to the target site | part T in a subject is shown. Here, the ultrasonic probe 10e according to the sixth embodiment is different from the ultrasonic probes 10 to 10d according to the first to fifth embodiments in the number of second ultrasonic probe groups 17. . Hereinafter, these will be mainly described.

  FIG. 8B is a first cross-sectional view of the ultrasonic probe 10e shown in FIG. 8A. 8B shows a cross-sectional view taken along the line AA in FIG. 8A. FIG. 8C is a second cross-sectional view of the ultrasonic probe shown in FIG. 8A. 8C shows a cross-sectional view taken along the line BB in FIG. 8A.

  As shown in FIG. 8B, in the ultrasonic probe 10e according to the sixth embodiment, the first ultrasonic probe group 14 swings. The ultrasonic probe 10e according to the sixth embodiment includes, for example, three second ultrasonic probe groups 17 as illustrated in FIG. 8C.

  FIG. 8D is a diagram showing an ultrasound image generated using the ultrasound probe of FIG. 8A. By using the ultrasonic probe 10e, a three-dimensional image generated based on the ultrasonic waves transmitted and received by the first ultrasonic probe group 14 is obtained from each of the second ultrasonic probe groups 17. The generated two-dimensional image can be synthesized. It is also possible to simultaneously display a two-dimensional image generated from each of the second ultrasonic probe groups 17.

  As described above, according to the sixth embodiment, a plurality of second ultrasonic probe groups 17 are provided. Therefore, the ultrasonic probe 10e according to the sixth embodiment can display various combinations of images, and can improve the accuracy of puncture.

(Seventh embodiment)
Next, an ultrasonic diagnostic apparatus including the ultrasonic probe according to the seventh embodiment will be described. FIG. 9 is a diagram illustrating an example of the overall configuration of the ultrasonic diagnostic apparatus 1 according to the seventh embodiment. As shown in FIG. 9, the ultrasonic diagnostic apparatus 1 according to the seventh embodiment includes an ultrasonic probe 31, an input apparatus 32, a monitor 33, and an apparatus main body 300.

  The ultrasonic probe 31 is an ultrasonic probe according to the first to sixth embodiments described above. The ultrasonic probe 31 includes a plurality of piezoelectric vibrators, and the plurality of piezoelectric vibrators generate ultrasonic waves based on a drive signal supplied from a transmission / reception unit 310 included in the apparatus main body 300 to be described later. The reflected wave from the subject P is received and converted into an electric signal. The ultrasonic probe 31 includes a matching layer provided in the piezoelectric vibrator, a backing material that prevents propagation of ultrasonic waves from the piezoelectric vibrator to the rear, and the like.

  When ultrasonic waves are transmitted from the ultrasonic probe 31 to the subject P, the transmitted ultrasonic waves are reflected one after another on the discontinuous surface of the acoustic impedance in the body tissue of the subject P, and the ultrasonic probe is reflected as a reflected wave signal. It is received by a plurality of piezoelectric vibrators 31. The amplitude of the received reflected wave signal depends on the difference in acoustic impedance at the discontinuous surface where the ultrasonic wave is reflected. The reflected wave signal when the transmitted ultrasonic pulse is reflected by the moving blood flow or the surface of the heart wall depends on the velocity component of the moving object in the ultrasonic transmission direction due to the Doppler effect. , Subject to frequency shift.

  The input device 32 receives various setting requests from the operator of the ultrasound diagnostic apparatus 1 and transfers the received various setting requests to the apparatus main body 300. The input device 32 is, for example, a trackball, a switch, a button, a touch command screen, a keyboard, a mouse, or the like.

  The monitor 33 displays a GUI (Graphical User Interface) for the operator of the ultrasonic diagnostic apparatus 1 to input various setting requests using the input device 32, and displays an ultrasonic image generated in the apparatus main body 300. Or display.

  The apparatus main body 300 is an apparatus that generates an ultrasonic image based on the reflected wave received by the ultrasonic probe 31, and as shown in FIG. 9, a transmission / reception unit 310, a signal processing unit 320, an image generation unit 330, and the like. , An image memory 340, an internal storage unit 350, and a control unit 360.

  The transmission / reception unit 310 includes a trigger generation circuit, a delay circuit, a pulsar circuit, and the like, and supplies a drive signal to the ultrasonic probe 31. The pulsar circuit repeatedly generates rate pulses for forming transmission ultrasonic waves at a predetermined rate frequency. The delay circuit also sets the delay time for each piezoelectric vibrator necessary for determining the transmission directivity by converging the ultrasonic wave generated from the ultrasonic probe 31 into a beam, and for each rate pulse generated by the pulser circuit. Give to. The trigger generation circuit applies a drive signal (drive pulse) to the ultrasonic probe 31 at a timing based on the rate pulse. In other words, the delay circuit arbitrarily adjusts the transmission direction from the piezoelectric vibrator surface by changing the delay time given to each rate pulse.

  The transmission / reception unit 310 includes an amplifier circuit, an A / D converter, an adder, and the like, and performs various processes on the reflected wave signal received by the ultrasonic probe 31 to generate reflected wave data. The amplifier circuit amplifies the reflected wave signal for each channel and performs gain correction processing, and the A / D converter is necessary for A / D converting the gain-corrected reflected wave signal to determine the reception directivity. The adder performs an addition process of the reflected wave signal processed by the A / D converter to generate reflected wave data. By the addition processing of the adder, the reflection component from the direction corresponding to the reception directivity of the reflected wave signal is emphasized. The transmission / reception unit 310 includes a drive machine control circuit and the like, and supplies power to the drive machine for mechanically swinging the ultrasonic probe group built in the ultrasonic probe 31 and operation of the drive machine. Monitor the situation.

  As described above, the transmission / reception unit 310 controls the transmission directivity and the reception directivity in the transmission / reception of ultrasonic waves, and also controls the drive unit for mechanically swinging the ultrasonic probe group. The transmission / reception unit 310 has a function capable of instantaneously changing delay information, a transmission frequency, a transmission drive voltage, the number of aperture elements, and the like under the control of the control unit 360 described later. In particular, the change of the transmission drive voltage is realized by a linear amplifier type oscillation circuit capable of instantaneously switching values or a mechanism for electrically switching a plurality of power supply units. The transmission / reception unit 310 can also transmit and receive different waveforms for each frame or rate.

  The signal processing unit 320 receives reflected wave data that is a processed reflected wave signal that has been subjected to gain correction processing, A / D conversion processing, and addition processing from the transmission / reception unit 310, and performs logarithmic amplification, envelope detection processing, and the like. Thus, data (B mode data) in which the signal intensity is expressed by brightness is generated.

  Here, the signal processing unit 320 can change the frequency band to be visualized by changing the detection frequency. Further, the signal processing unit 320 can perform detection processing with two detection frequencies in parallel on one reception data.

  Further, the signal processing unit 320 performs frequency analysis on velocity information from the reflected wave data received from the transmission / reception unit 310, extracts blood flow, tissue, and contrast agent echo components due to the Doppler effect, and moves average velocity, dispersion, power, and the like. Data (Doppler data) obtained by extracting body information for multiple points is generated.

  The image generation unit 330 generates ultrasonic images that are continuous in time series from the B-mode data generated by the signal processing unit 320 and the Doppler data. Then, the image generation unit 330 stores the generated ultrasonic image in the image memory 340.

  Further, the image generation unit 330 sequentially converts the generated ultrasonic image into a display image and stores the image in the image memory 340. Specifically, the image generation unit 330 reads an ultrasonic image from the image memory 340 and converts (scan converts) it into a scanning line signal sequence of a video format typified by a television or the like, thereby displaying an image for display (B mode). Image and Doppler image) are generated, and the generated display image is stored in the image memory 340 again. Note that the image generation unit 330 also executes control related to collection of image data.

  The image generation unit 330 then transmits the first ultrasonic image based on the ultrasonic waves transmitted and received by the first ultrasonic probe group 14 and the ultrasonic waves transmitted and received by the second ultrasonic probe group 17. And a second ultrasonic image based on the above. Furthermore, the image generation unit 330 generates the first ultrasonic image and the second ultrasonic image with different color tones.

  The image memory 340 stores the Raw data (B-mode data and Doppler data) generated by the signal processing unit 320, the ultrasonic image and the display image generated by the image generation unit 330. Further, the image memory 340 stores a processing result by the image generation unit 330. Furthermore, the image memory 340 stores an output signal (RF: Radio Frequency) immediately after passing through the transmission / reception unit 310, an image luminance signal, various raw data, and the like as necessary.

  The internal storage unit 350 stores various data such as a control program for performing ultrasonic transmission / reception, image processing, and display processing, diagnostic information (for example, patient ID, doctor's findings, etc.), and diagnostic protocol. The internal storage unit 350 is also used for storing images stored in the image memory 340 as necessary.

  The control unit 360 controls the entire processing in the ultrasonic diagnostic apparatus 1. Specifically, the control unit 360 controls various processes of the transmission / reception unit 310, the signal processing unit 320, and the image generation unit 330. For example, the control unit 360 controls various processes based on various setting requests input from the operator via the input device 32, various control programs and various setting information read from the internal storage unit 350, and the like. The display memory stored in the image memory 340 is controlled to be displayed on the monitor 33.

  For example, the control unit 360 causes the monitor 33 to simultaneously display the first ultrasonic image and the second ultrasonic image generated by the image generation unit 330. Further, the control unit 360 controls to display a puncture marker for guiding the puncture needle together with at least one of the first ultrasonic image and the second ultrasonic image. Here, when the fixed position of the second ultrasound probe group 17 is made variable, the control unit 360 combines the three-dimensional image, the two-dimensional image, and the three-dimensional image with the two-dimensional image. The display position of the puncture marker for guiding the puncture needle displayed on is changed in accordance with the change in the fixed position of the second ultrasonic probe group 17.

  As described above, according to the seventh embodiment, the image generation unit 330 includes the first ultrasonic image based on the ultrasonic wave transmitted and received by the first ultrasonic probe group 14 and the second ultrasonic wave. A second ultrasonic image based on the ultrasonic waves transmitted and received by the acoustic probe group 17 is generated. Then, the control unit 360 causes the display unit to simultaneously display the first ultrasonic image and the second ultrasonic image generated by the image generation unit 330. Therefore, the ultrasonic diagnostic apparatus 1 according to the seventh embodiment makes it possible to provide a puncture operator with an image that is easy to execute for puncture.

  Further, according to the seventh embodiment, the image generating unit 330 generates the first ultrasonic image and the second ultrasonic image with different color tones. Therefore, the ultrasonic diagnostic apparatus 1 according to the seventh embodiment makes it possible to present and display an image in which each image can be easily recognized.

  Further, according to the seventh embodiment, the control unit 360 displays a puncture marker for guiding the puncture needle together with at least one of the first ultrasonic image and the second ultrasonic image. Control. Therefore, the ultrasonic diagnostic apparatus 1 according to the seventh embodiment can further improve the safety of puncture.

  As described above, according to the first to seventh embodiments, at the time of puncturing, an ultrasonic probe and an ultrasonic wave capable of obtaining a wide range of ultrasonic images with high accuracy and suppressing deterioration in operability. It makes it possible to provide a diagnostic device.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Ultrasonic diagnostic apparatus 10 Ultrasonic probe 14 1st ultrasonic probe group 17 2nd ultrasonic probe group

Claims (11)

While scanning a plane parallel to the arrangement direction of the ultrasound probes, the ultrasound probe is swung in a direction orthogonal to the arrangement direction, thereby providing a plurality of ultrasound probes that scan the subject three-dimensionally. A first group of ultrasonic probes arranged in a dimension;
A second ultrasonic probe in which a plurality of ultrasonic probes that scan any one of the plurality of scanning surfaces scanned by the first ultrasonic probe group are arranged one-dimensionally. Tentacle group,
Equipped with a,
The second ultrasonic probe group is swung in a direction perpendicular to the arrangement direction of the ultrasonic probes in the second ultrasonic probe group and fixed at an arbitrary position. Ultrasonic probe. While scanning a plane parallel to the arrangement direction of the ultrasound probes, the ultrasound probe is swung in a direction orthogonal to the arrangement direction, thereby providing a plurality of ultrasound probes that scan the subject three-dimensionally. A first group of ultrasonic probes arranged in a dimension;
A second ultrasonic probe in which a plurality of ultrasonic probes that scan any one of the plurality of scanning surfaces scanned by the first ultrasonic probe group are arranged one-dimensionally. Tentacle group,
A puncture needle mounting mechanism for guiding a puncture needle to the scanning surface of the second ultrasonic probe group, or a mounting mechanism for mounting a puncture needle guide instrument;
An ultrasonic probe comprising: In the second ultrasonic probe group, the arrangement direction of the ultrasonic probes in the second ultrasonic probe group is the same as that of the ultrasonic probes in the first ultrasonic probe group. the ultrasonic probe according to claim 1 or 2, characterized in that it is arranged such that the array direction substantially parallel. The ultrasonic probe according to claim 3 , wherein the second ultrasonic probe group is disposed to be inclined toward a center of the first ultrasonic probe group. The second ultrasonic probe group is disposed on a surface side facing the acoustic radiation surface in the first ultrasonic probe group, and transmission / reception of ultrasonic waves by the second ultrasonic probe group is performed. 3. The ultrasonic probe according to claim 2 , wherein the first ultrasonic probe group is executed on condition that the first ultrasonic probe group is not located in the vicinity of the ultrasonic scanning surface.   The distance between the ultrasonic probes in the first ultrasonic probe group is substantially the same as the distance between the ultrasonic probes in the second ultrasonic probe group. The ultrasonic probe according to any one of claims 1 to 5.   The width of the first ultrasonic probe group in the direction orthogonal to the arrangement direction and the width of the second ultrasonic probe group in the direction orthogonal to the arrangement direction are substantially the same. The ultrasonic probe according to any one of claims 1 to 6, characterized in that: The ultrasonic probe according to any one of claims 1 to 7 , comprising:
Image generating means for generating an ultrasonic image based on the ultrasonic waves transmitted and received by the ultrasonic probe;
Display control means for controlling the ultrasonic image generated by the image generation means to be displayed on a display unit;
An ultrasonic diagnostic apparatus comprising: The image generation means is based on a first ultrasonic image based on an ultrasonic wave transmitted and received by the first ultrasonic probe group and an ultrasonic wave transmitted and received by the second ultrasonic probe group. A second ultrasound image, respectively,
The ultrasonic diagnosis according to claim 8 , wherein the display control unit causes the display unit to simultaneously display the first ultrasonic image and the second ultrasonic image generated by the image generation unit. apparatus. The ultrasonic diagnostic apparatus according to claim 9 , wherein the image generation unit generates the first ultrasonic image and the second ultrasonic image with different color tones. The display control means controls to display a puncture marker for guiding a puncture needle together with at least one of the first ultrasonic image and the second ultrasonic image. Item 11. The ultrasonic diagnostic apparatus according to Item 9 or 10 .

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