CA1218142A - Oscillating ultrasound scanhead - Google Patents
Oscillating ultrasound scanheadInfo
- Publication number
- CA1218142A CA1218142A CA000467281A CA467281A CA1218142A CA 1218142 A CA1218142 A CA 1218142A CA 000467281 A CA000467281 A CA 000467281A CA 467281 A CA467281 A CA 467281A CA 1218142 A CA1218142 A CA 1218142A
- Authority
- CA
- Canada
- Prior art keywords
- rotor
- motor
- oscillating
- housing
- scanhead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
- A61B8/4444—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device related to the probe
- A61B8/4461—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe
- A61B8/4466—Features of the scanning mechanism, e.g. for moving the transducer within the housing of the probe involving deflection of the probe
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/35—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams
- G10K11/352—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams by moving the transducer
- G10K11/355—Arcuate movement
Abstract
ABSTRACT
OSCILLATING ULTRASOUND SCANHEAD
The scanhead uses a shaft mounted, oscillating rotor driven by a shaft mounted rotor.
Energy storage and repulsive means, provided by magnetic "bumpers" helps to reverse the direction of motion of the rotor at the end of the scan angle.
OSCILLATING ULTRASOUND SCANHEAD
The scanhead uses a shaft mounted, oscillating rotor driven by a shaft mounted rotor.
Energy storage and repulsive means, provided by magnetic "bumpers" helps to reverse the direction of motion of the rotor at the end of the scan angle.
Description
OSCILLATING ULTRASOUND SKINNED
The present invention relates to an oscillating skinned drive for use with medical diagnostic ultrasound equipment. In particular, the invention relates to a drive for a skinned of the type-used in an ultrasound sector scanner.
These are numerous types of ultrasound sector scanners presently used or medical diagnosis.
These scanners employ two basic types of apparatus - to impart mechanical movement. In the first type ox apparatus, from two Jo four transducers are mounted on a rotating armature, and an individual on of these transducers is activated or transmission and reception of ultrasound energy at any given time. This type of skinned, typically called a writer skinned, while in common use, is very expensive to produce for a number seasons. In ZOO particular, each of the transducers used in the skinned must be matched to the other transducers in order to avoid looking or degradation of image quality when the unit switches from one transducer to the next one. Accordingly, hand matching ox transducers a labor intensive, expensive procedure, is employed to select matched transducers to ye mounted in a rotor. Then, OKAY
matched transduces are obtained, it us critical Jo mount them all on the same axis on the rotating armature in order to avoid pcoblèms of image flicker on the screen as the different ~cansducecs aye activated.
In another type ox ultrasound Canada called an "oscillating" skinned or a wobbler a single ~rdnsducer is Swede That tran~.d~cec is mounted in I
WEBB
a mechanism which oscillates back and forth. The oscillating skinned has the advantage of being S less expensive to produce in that only a single transducer is ~eguired. thereby avoiding the problems associated with matching transducers and aligning them on the same axis. A problem.
however, with oscillating scan heads is that they typically vibrate quite a bit due to their oscillatory operation. Accordingly, it would be - highly desirable to have an oscillating mechanism which is always dynamically balanced.
eye present invention relates to an oscillating mechanism which us always in dynamic balance. 'rho invention includes a system which provides energy storage to help yield the maxil~lum possible frame rate while imposing the least amount ox stress on the mechanism. The present invention also provides and efficient means or absorbing and returning energy to the system. In accordance with the present invention. a pair of parallel shafts each holding a massive element are juxtaposed adjacent to one another whereby their moments of inertia are equal. The shafts aye interconnected so thaw a clockwise rotation ox thy first shaft induces a corresponding counterclockwise rotation of the second shaft. The dynamic balance Ox the two shafts is accomplished by hazing the mast on each shalt in complete dynamic balance and by having the ine~tias of each mass related to the instantaneous angular velocity of each shaft was determined by the ratio TV movement between Cue shuts). The relationship Coors Chat the moment WEBB
of inertia of the first shaft times the angular velocity of the first shaft equal the moment ox inertia of the second shaft times the angular velocity of the second shaft. In accordance with the invention. a novel magnetic bumper means is used to store rotational energy and restore it to the system, in much the same manner as a mechanical spring.
FIG. 1 is a top cross-sectional view of an ultrasound skinned of the type employing the present invention, FIG. 2 is a side cross-sectional view of the oscillating ultrasound skinned of FIG. 1:
FIG. 3 is an illustration of the inner in which the two shafts are connected in the present invention;
20 . FIG. 4 is an end cross-sec~ional view showing the inner portion of the rotor of the ultrasound skinned as viewed prom the motor:
FIG. 5 is an illustration of the encoder disk used in the present invention:
Z5 JIG. 6 is a top view illustrating Cue manner in which the magnetic repulsion system operates FIG. 7 is a top cross sectional view of a second embodiment of the present invention; and FIG. a is a side cross-sectional view of the embodiment ox FIG. 7.
Referring now generally to FIGS. 1 and I, the oscillating skinned 10 of the present invention is shown. The skinned lo is comprised of a housing 12 which contains a motor lo mounted on 3 shaft 'I B 17 16. In the preferred embodiment of the invention, the motor 14 is a three phase brush less DC motor.
5 As shown in FIG. 2, the ends 13, 15 of the shaft 16 are mounted in the housing lo. Accordingly, when the motor 14 rotates, the body of the motor 14 rotates around a stationary shaft 16, as opposed to a more conventional mounting arrangement in which 10 the motor housing is fixed and the shaft rotates.
With reference to FIG. 3, in the preferred embodiment of the invention, the motor 14 has a cable 18 attached to its body at a first attachment point 17. The other end of the cable 18 is 15 attached to a second attachment point 19 on a rotor 22. A second cable 20 it attached to a third attachment point 21 on the rotor 22 and to a ~0l3~th attachment point 23 on the motor 14. The second cable 20 is attached to the fourth attachment point 20 23 through a tensioning spring 25, as shown. The cables 15, 20 are pitted into a pair of grooves 27, 29 in the body of the motor 14 and the rotor 22 which are shown in FIGS. 2 and 4 (with the cables 18, 20 removed for clarity). The rotor 22 is 25 mounted on a hollow, stationary shalt 24 whose ends AL, 33 are attached to the housing 12, as shown in FIG. 2. Beatings 35 permit the rotor 22 to rotate on the shaft 24. The shafts 16, Z4 are substantially parallel to one another. The rotor I holds an ultrasonic transducer 26 which is typically a piezoelect~ic transducer.
As show in FIG. 1, when the ought Z2 oscillates, the axis I of the transducer 26, which is typically aligned with a radial emanating prom the center of the sham I ox the rotor 22, .. , .
WEBB
I
oscillates through a scan angle 30. The housing 12 encloses a cavity 32 in which the motor, 14 and the 5 rotor 22 are located. The housing I is completely filled with an acoustic coupling fluid, such as mineral oil. The acoustic coupling fluid is injected into the cavity 32 through a fill port 34 which extends through a bulkhead 36. At the front 10 of the skinned 10, there is an end cap 37 which is made of a material, such as plastic, which is substantially transparent to ultrasound waves transmitted and received by the transducer Z6.
Signal wires 38 (shown in FIG. 2, but omitted prom FIG. 1 for clarity) which go to the transducer 26, and the three phase power wives 40, tush go to the motor 14. pass through the bullhead 36, as shown in FIG. 2. The signal wives 38 pass into the center of the hollow rotor 22 via the hollow shalt 24, as shown, and they are electrically connected to the transducer 26 in the standard manner. Also, wires 42 which go to a position tensing head 44 containing light omitting diode (LED) light sources and photo-transistor pickups (not shown), pass through the bulk head 36. A rear cap 46, Tush holds a strain relief thought connects to a cable 50, is screwed onto the threaded exterior wall 52 of the bulkhead 36 in order to protect the Jill port 34 and the various wires I 4Q, 42.
Jo An encoder disk 54, shown also in FIG. 5, is attached to the Roy 22 as shown in FIG. 2. In the preferred embodiment of the invention, the encoder disk 54 is glued Co the rotor 22. The encoder disk 54 is purl copied of a disk of assay with a1te~natin~ reflective end J~17 non-reflective lines which are observed by the photoelectric read head 44 in a manner well known in the art. The combination of the photoelectric read head 44 and the encoder disk 54 provide a system for accurately determining the position of the rotor 22, and consequently the position of the axis 2B of the piezoelectric transducer 26.
Referring now generally Jo FIGS. 1 and 6. the skinned 10 also includes a number ox fixed magnets 56 which are mounted in the housing 12. As shown in FIG. 6, the fixed magnets 56 have an orientation such that one pole ox each of the fixed magnets So, i.e., the north pole as shown in FIG. 6, extends out of the housing 12 twittered either the rotor 22 or the motor I Rotating magnets 53 are owned on the rotor 22 and on the motor 14. The orientation ox the rotating magnets spa is such that the same pole, i.e., the north pole, extends out prom the motor 14 or rotor 2Z. Accordingly, as the motor 14 rotate in a particular direction. i.e. clockwise, the fixed and rotating magnets 56, 58 will interact in repulsion as the rotating magnets SUB get close to the mixed magnets 56. Accordingly. the magnetic field provides an energy storage and repulsion system, similar to a mechanical spring. which provides or very smooth operation of the piezoelectric transducer rotor 22. In the puked embodiment ox the invention, the magnets 56, 58 are samar1um-cobalt magnets. As is well known in the art, appropriate signals are sent to ; the three phase brollies rotor 14 on order to Cook" the rotor 14 to add any energy which is needed as a result ox inevitable losses in the ... .
~21~l42 rub 17 system .
In the preferred embodiment 10, there are a total of 20 magnets 58, 56 with three rotating magnets spa mounted on each ox the upper and lower portions of the motor 14 and the rotor 22, respectively, for a total of twelve rotating magnets 58. There are also eight fixed magnets 56 mounted on the housing lo, with four each on the top tree FIG. 1), and ox the bottom (See FIG. 2).
In the operation of the preferred embodiment of the invention, a standard motor controller (not shown) may be used to control the operation of the three phase motor 14. Feedback information relating to the position of the rotor 22 is provided to the motor controller my the position sensing head I from information derived prom the encoder disk 54. Accordingly, the motor controller always "know" where the transducer 26 is pointing - in the scat angle 30. The overall system is arranged to be dynamically balanced, and in combination with the energy storage provided by the magnets 54, 56, very little energy is required to keep the rotor 22 oscillating.
Referring now to FIGS. 7 and 8, an ; alternative embodiment 60 of the present invention is shown. In the alternative embodiment I
instead of a cable drive system, as used in the preferred embodiment a gear drive system is used.
There are gear segments 62, 64 on the motor 66 and on eke rotor 68~ respectively. Otherwise, the ~bodiment 60 operates in a manner identical to the roared embodiment 10 which uses the cables 18, 20 to drove to. It has been found that the cable ., .
-8- r~?B17 drive system is quieter and more compact. and it provides smoother operation than the gear drive system. Therefore, the cable system is preferred.
Elowever, the gear drive system is considered. also, to be within the scope of the present invention.
' Jo '` .
.
The present invention relates to an oscillating skinned drive for use with medical diagnostic ultrasound equipment. In particular, the invention relates to a drive for a skinned of the type-used in an ultrasound sector scanner.
These are numerous types of ultrasound sector scanners presently used or medical diagnosis.
These scanners employ two basic types of apparatus - to impart mechanical movement. In the first type ox apparatus, from two Jo four transducers are mounted on a rotating armature, and an individual on of these transducers is activated or transmission and reception of ultrasound energy at any given time. This type of skinned, typically called a writer skinned, while in common use, is very expensive to produce for a number seasons. In ZOO particular, each of the transducers used in the skinned must be matched to the other transducers in order to avoid looking or degradation of image quality when the unit switches from one transducer to the next one. Accordingly, hand matching ox transducers a labor intensive, expensive procedure, is employed to select matched transducers to ye mounted in a rotor. Then, OKAY
matched transduces are obtained, it us critical Jo mount them all on the same axis on the rotating armature in order to avoid pcoblèms of image flicker on the screen as the different ~cansducecs aye activated.
In another type ox ultrasound Canada called an "oscillating" skinned or a wobbler a single ~rdnsducer is Swede That tran~.d~cec is mounted in I
WEBB
a mechanism which oscillates back and forth. The oscillating skinned has the advantage of being S less expensive to produce in that only a single transducer is ~eguired. thereby avoiding the problems associated with matching transducers and aligning them on the same axis. A problem.
however, with oscillating scan heads is that they typically vibrate quite a bit due to their oscillatory operation. Accordingly, it would be - highly desirable to have an oscillating mechanism which is always dynamically balanced.
eye present invention relates to an oscillating mechanism which us always in dynamic balance. 'rho invention includes a system which provides energy storage to help yield the maxil~lum possible frame rate while imposing the least amount ox stress on the mechanism. The present invention also provides and efficient means or absorbing and returning energy to the system. In accordance with the present invention. a pair of parallel shafts each holding a massive element are juxtaposed adjacent to one another whereby their moments of inertia are equal. The shafts aye interconnected so thaw a clockwise rotation ox thy first shaft induces a corresponding counterclockwise rotation of the second shaft. The dynamic balance Ox the two shafts is accomplished by hazing the mast on each shalt in complete dynamic balance and by having the ine~tias of each mass related to the instantaneous angular velocity of each shaft was determined by the ratio TV movement between Cue shuts). The relationship Coors Chat the moment WEBB
of inertia of the first shaft times the angular velocity of the first shaft equal the moment ox inertia of the second shaft times the angular velocity of the second shaft. In accordance with the invention. a novel magnetic bumper means is used to store rotational energy and restore it to the system, in much the same manner as a mechanical spring.
FIG. 1 is a top cross-sectional view of an ultrasound skinned of the type employing the present invention, FIG. 2 is a side cross-sectional view of the oscillating ultrasound skinned of FIG. 1:
FIG. 3 is an illustration of the inner in which the two shafts are connected in the present invention;
20 . FIG. 4 is an end cross-sec~ional view showing the inner portion of the rotor of the ultrasound skinned as viewed prom the motor:
FIG. 5 is an illustration of the encoder disk used in the present invention:
Z5 JIG. 6 is a top view illustrating Cue manner in which the magnetic repulsion system operates FIG. 7 is a top cross sectional view of a second embodiment of the present invention; and FIG. a is a side cross-sectional view of the embodiment ox FIG. 7.
Referring now generally to FIGS. 1 and I, the oscillating skinned 10 of the present invention is shown. The skinned lo is comprised of a housing 12 which contains a motor lo mounted on 3 shaft 'I B 17 16. In the preferred embodiment of the invention, the motor 14 is a three phase brush less DC motor.
5 As shown in FIG. 2, the ends 13, 15 of the shaft 16 are mounted in the housing lo. Accordingly, when the motor 14 rotates, the body of the motor 14 rotates around a stationary shaft 16, as opposed to a more conventional mounting arrangement in which 10 the motor housing is fixed and the shaft rotates.
With reference to FIG. 3, in the preferred embodiment of the invention, the motor 14 has a cable 18 attached to its body at a first attachment point 17. The other end of the cable 18 is 15 attached to a second attachment point 19 on a rotor 22. A second cable 20 it attached to a third attachment point 21 on the rotor 22 and to a ~0l3~th attachment point 23 on the motor 14. The second cable 20 is attached to the fourth attachment point 20 23 through a tensioning spring 25, as shown. The cables 15, 20 are pitted into a pair of grooves 27, 29 in the body of the motor 14 and the rotor 22 which are shown in FIGS. 2 and 4 (with the cables 18, 20 removed for clarity). The rotor 22 is 25 mounted on a hollow, stationary shalt 24 whose ends AL, 33 are attached to the housing 12, as shown in FIG. 2. Beatings 35 permit the rotor 22 to rotate on the shaft 24. The shafts 16, Z4 are substantially parallel to one another. The rotor I holds an ultrasonic transducer 26 which is typically a piezoelect~ic transducer.
As show in FIG. 1, when the ought Z2 oscillates, the axis I of the transducer 26, which is typically aligned with a radial emanating prom the center of the sham I ox the rotor 22, .. , .
WEBB
I
oscillates through a scan angle 30. The housing 12 encloses a cavity 32 in which the motor, 14 and the 5 rotor 22 are located. The housing I is completely filled with an acoustic coupling fluid, such as mineral oil. The acoustic coupling fluid is injected into the cavity 32 through a fill port 34 which extends through a bulkhead 36. At the front 10 of the skinned 10, there is an end cap 37 which is made of a material, such as plastic, which is substantially transparent to ultrasound waves transmitted and received by the transducer Z6.
Signal wires 38 (shown in FIG. 2, but omitted prom FIG. 1 for clarity) which go to the transducer 26, and the three phase power wives 40, tush go to the motor 14. pass through the bullhead 36, as shown in FIG. 2. The signal wives 38 pass into the center of the hollow rotor 22 via the hollow shalt 24, as shown, and they are electrically connected to the transducer 26 in the standard manner. Also, wires 42 which go to a position tensing head 44 containing light omitting diode (LED) light sources and photo-transistor pickups (not shown), pass through the bulk head 36. A rear cap 46, Tush holds a strain relief thought connects to a cable 50, is screwed onto the threaded exterior wall 52 of the bulkhead 36 in order to protect the Jill port 34 and the various wires I 4Q, 42.
Jo An encoder disk 54, shown also in FIG. 5, is attached to the Roy 22 as shown in FIG. 2. In the preferred embodiment of the invention, the encoder disk 54 is glued Co the rotor 22. The encoder disk 54 is purl copied of a disk of assay with a1te~natin~ reflective end J~17 non-reflective lines which are observed by the photoelectric read head 44 in a manner well known in the art. The combination of the photoelectric read head 44 and the encoder disk 54 provide a system for accurately determining the position of the rotor 22, and consequently the position of the axis 2B of the piezoelectric transducer 26.
Referring now generally Jo FIGS. 1 and 6. the skinned 10 also includes a number ox fixed magnets 56 which are mounted in the housing 12. As shown in FIG. 6, the fixed magnets 56 have an orientation such that one pole ox each of the fixed magnets So, i.e., the north pole as shown in FIG. 6, extends out of the housing 12 twittered either the rotor 22 or the motor I Rotating magnets 53 are owned on the rotor 22 and on the motor 14. The orientation ox the rotating magnets spa is such that the same pole, i.e., the north pole, extends out prom the motor 14 or rotor 2Z. Accordingly, as the motor 14 rotate in a particular direction. i.e. clockwise, the fixed and rotating magnets 56, 58 will interact in repulsion as the rotating magnets SUB get close to the mixed magnets 56. Accordingly. the magnetic field provides an energy storage and repulsion system, similar to a mechanical spring. which provides or very smooth operation of the piezoelectric transducer rotor 22. In the puked embodiment ox the invention, the magnets 56, 58 are samar1um-cobalt magnets. As is well known in the art, appropriate signals are sent to ; the three phase brollies rotor 14 on order to Cook" the rotor 14 to add any energy which is needed as a result ox inevitable losses in the ... .
~21~l42 rub 17 system .
In the preferred embodiment 10, there are a total of 20 magnets 58, 56 with three rotating magnets spa mounted on each ox the upper and lower portions of the motor 14 and the rotor 22, respectively, for a total of twelve rotating magnets 58. There are also eight fixed magnets 56 mounted on the housing lo, with four each on the top tree FIG. 1), and ox the bottom (See FIG. 2).
In the operation of the preferred embodiment of the invention, a standard motor controller (not shown) may be used to control the operation of the three phase motor 14. Feedback information relating to the position of the rotor 22 is provided to the motor controller my the position sensing head I from information derived prom the encoder disk 54. Accordingly, the motor controller always "know" where the transducer 26 is pointing - in the scat angle 30. The overall system is arranged to be dynamically balanced, and in combination with the energy storage provided by the magnets 54, 56, very little energy is required to keep the rotor 22 oscillating.
Referring now to FIGS. 7 and 8, an ; alternative embodiment 60 of the present invention is shown. In the alternative embodiment I
instead of a cable drive system, as used in the preferred embodiment a gear drive system is used.
There are gear segments 62, 64 on the motor 66 and on eke rotor 68~ respectively. Otherwise, the ~bodiment 60 operates in a manner identical to the roared embodiment 10 which uses the cables 18, 20 to drove to. It has been found that the cable ., .
-8- r~?B17 drive system is quieter and more compact. and it provides smoother operation than the gear drive system. Therefore, the cable system is preferred.
Elowever, the gear drive system is considered. also, to be within the scope of the present invention.
' Jo '` .
.
Claims (8)
1. An oscillating ultrasound scanhead comprising:
(a) a housing:
(b) a reversible electric motor mounted in said housing, the shaft of said motor being fixedly mounted to said housing:
(c) an ultrasound transducer mounted on a rotor, said rotor being rotatably mounted on a motor shaft which is substantially parallel to said motor shaft. whereby said rotor can rotate at least through an angle corresponding to the scan angle of said oscillating ultrasound scanhead:
(d) means for driving said rotor by said motor: and (e) repulsion and energy storage means comprised of fixed magnets mounted in said housing and rotating magnets mounted on said motor and rotor, whereby said magnets are arranged to repel one another at the ends of said scan angle due to the magnetic fields generated therebetween.
(a) a housing:
(b) a reversible electric motor mounted in said housing, the shaft of said motor being fixedly mounted to said housing:
(c) an ultrasound transducer mounted on a rotor, said rotor being rotatably mounted on a motor shaft which is substantially parallel to said motor shaft. whereby said rotor can rotate at least through an angle corresponding to the scan angle of said oscillating ultrasound scanhead:
(d) means for driving said rotor by said motor: and (e) repulsion and energy storage means comprised of fixed magnets mounted in said housing and rotating magnets mounted on said motor and rotor, whereby said magnets are arranged to repel one another at the ends of said scan angle due to the magnetic fields generated therebetween.
2. The oscillating ultrasound scanhead of Claim 1 further comprising encoder means for determining the position of said rotor.
3. The oscillating ultrasound scanhead of Claim 2 wherein said encoder means is comprised of a reflective disk mounted on said rotor and a photoelectric position sensing head mounted in said housing adjacent to said rotor.
4. The oscillating ultrasound scanhead of Claim 1 wherein said rotor shaft is hollow and signal wires connected to siad transducer pass through said shaft.
5. The oscillating ultrasound scanhead of Claim 1 further comprising a bulkhead which closes off said housing to define a cavity therein, said cavity containing said motor and said rotor.
6. The oscillating ultrasound scanhead of Claim 5 wherein said cavity is filled with an ultrasound conducting fluid.
7. The oscillating ultrasound scanhead of Claim 5 wherein said means for driving said rotor comprises a pair of cables connected between said motor and said rotor.
8. The oscillating ultrasound scanhead of Claim 5 wherein said means for driving said rotor comprises a interactive gear segments on said motor and said rotor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US553,716 | 1983-11-21 | ||
| US06/553,716 US4515017A (en) | 1983-11-21 | 1983-11-21 | Oscillating ultrasound scanhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1218142A true CA1218142A (en) | 1987-02-17 |
Family
ID=24210449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000467281A Expired CA1218142A (en) | 1983-11-21 | 1984-11-07 | Oscillating ultrasound scanhead |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4515017A (en) |
| EP (1) | EP0142832A3 (en) |
| JP (1) | JPS60132546A (en) |
| CA (1) | CA1218142A (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587971A (en) * | 1984-11-29 | 1986-05-13 | North American Philips Corporation | Ultrasonic scanning apparatus |
| US4841978A (en) * | 1984-12-24 | 1989-06-27 | North American Philips Corporation | Ultrasonic scanning device with elastic pumper |
| US4869257A (en) * | 1985-06-03 | 1989-09-26 | Picker International, Inc. | Ultrasonic mechanical sector scanning transducer probe assembly |
| US4773426A (en) * | 1985-06-03 | 1988-09-27 | Picker International, Inc. | Ultrasonic mechanical sector scanning transducer probe assembly |
| US4787247A (en) * | 1986-07-23 | 1988-11-29 | Sonomed Technology, Inc. | Scanning apparatus and method |
| EP0390311B1 (en) * | 1989-03-27 | 1994-12-28 | Kabushiki Kaisha Toshiba | Mechanical ultrasonic scanner |
| US4993416A (en) * | 1989-04-25 | 1991-02-19 | Board Of Reagents The University Of Texas System | System for ultrasonic pan focal imaging and axial beam translation |
| US5373849A (en) * | 1993-01-19 | 1994-12-20 | Cardiovascular Imaging Systems, Inc. | Forward viewing imaging catheter |
| US5625148A (en) * | 1995-04-25 | 1997-04-29 | Rohrback Cosasco Systems, Inc. | Ultrasonic scanning head and method |
| US5713356A (en) * | 1996-10-04 | 1998-02-03 | Optosonics, Inc. | Photoacoustic breast scanner |
| US20040243147A1 (en) | 2001-07-03 | 2004-12-02 | Lipow Kenneth I. | Surgical robot and robotic controller |
| US20040254466A1 (en) * | 2003-06-16 | 2004-12-16 | James Boner | Apparatus and method for real time three-dimensional ultrasound imaging |
| US8197231B2 (en) | 2005-07-13 | 2012-06-12 | Purity Solutions Llc | Diaphragm pump and related methods |
| US20070066901A1 (en) * | 2005-09-22 | 2007-03-22 | Siemens Medical Solutions Usa, Inc. | Fluid driven mechanical scanning with an ultrsound transducer array |
| US8206305B2 (en) * | 2006-11-28 | 2012-06-26 | Siemens Medical Solutions Usa, Inc. | Multi-twisted acoustic array for medical ultrasound |
| US8449467B2 (en) * | 2006-11-28 | 2013-05-28 | Siemens Medical Solutions Usa, Inc. | Helical acoustic array for medical ultrasound |
| US8317713B2 (en) | 2009-01-09 | 2012-11-27 | Volcano Corporation | Ultrasound catheter with rotatable transducer |
| US20110118590A1 (en) * | 2009-11-18 | 2011-05-19 | Siemens Medical Solutions Usa, Inc. | System For Continuous Cardiac Imaging And Mapping |
| US9610392B2 (en) | 2012-06-08 | 2017-04-04 | Fresenius Medical Care Holdings, Inc. | Medical fluid cassettes and related systems and methods |
| US10945706B2 (en) | 2017-05-05 | 2021-03-16 | Biim Ultrasound As | Hand held ultrasound probe |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1484699A (en) * | 1973-10-15 | 1977-09-01 | Tokyo Shibaura Electric Co | Ultrasonic wave diagnosis apparatus |
| JPS5311473B2 (en) * | 1974-07-03 | 1978-04-21 | ||
| US3955561A (en) * | 1974-09-16 | 1976-05-11 | Indianapolis Center For Advanced Research, Inc. | Cardioscan probe |
| JPS52130178A (en) * | 1976-04-23 | 1977-11-01 | Tokyo Shibaura Electric Co | Ultrasonic high speed repetition scanning device |
| US4130021A (en) * | 1976-11-12 | 1978-12-19 | Picker Corporation | Ultrasonic sector scanning search unit |
| US4130022A (en) * | 1976-11-12 | 1978-12-19 | Picker Corporation | Ultrasonic sector scanning search unit |
| US4092867A (en) * | 1977-02-10 | 1978-06-06 | Terrance Matzuk | Ultrasonic scanning apparatus |
| US4185501A (en) * | 1978-02-13 | 1980-01-29 | Second Foundation | Ultrasonic sector scanner |
| GB2028503B (en) * | 1978-08-11 | 1982-10-27 | Emi Ltd | Ultrasonic examining apparatus |
| US4399703A (en) * | 1980-10-16 | 1983-08-23 | Dymax Corporation | Ultrasonic transducer and integral drive circuit therefor |
| US4377088A (en) * | 1981-01-14 | 1983-03-22 | Honeywell Inc. | Angular position sensor |
| US4426886A (en) * | 1981-11-09 | 1984-01-24 | Advanced Diagnostic Research Corporation | Ultrasonic scanner |
| US4462255A (en) * | 1983-02-03 | 1984-07-31 | Technicare Corporation | Piezoelectric scanning systems for ultrasonic transducers |
-
1983
- 1983-11-21 US US06/553,716 patent/US4515017A/en not_active Expired - Lifetime
-
1984
- 1984-11-07 CA CA000467281A patent/CA1218142A/en not_active Expired
- 1984-11-16 EP EP84113872A patent/EP0142832A3/en not_active Ceased
- 1984-11-20 JP JP59246964A patent/JPS60132546A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60132546A (en) | 1985-07-15 |
| EP0142832A3 (en) | 1986-01-22 |
| US4515017A (en) | 1985-05-07 |
| JPH0571251B2 (en) | 1993-10-06 |
| EP0142832A2 (en) | 1985-05-29 |
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