ULTRASOUND IMAGING DEVICE OPERATED BY MOBILE DISPLAY DEVICE AND ULTRASOUND IMAGING SYSTEM

Abstract

The present invention relates to an ultrasound imaging system comprising an ultrasound image acquisition station and a mobile display device. When disconnected from the ultrasound image acquisition station, the mobile display device may be operated by its own operating system providing general purpose applications to a user. When connected to the ultrasound image acquisition station, the hardware of the mobile display device is operated by an ultrasound application dedicated operating system stored on the ultrasound image acquisition station. By this, a low weight and flexible to use ultrasound imaging system may be provided.

Claims

1. A portable ultrasound imaging system, comprising: an ultrasound acquisition assembly comprising a size and weight to be carried in a user's hand, wherein the ultrasound acquisition assembly comprises: an ultrasound transducer array; and a docking unit operably connected to the ultrasound transducer array and configured to couple to a mobile display device, the mobile display device comprising a touch screen display, a central processing unit (CPU), and a first memory unit, wherein the docking unit comprises: a housing; a beamformer coupled to the housing and in communication with the ultrasound transducer array; and a communication interface coupled to the housing and configured to establish communication between the docking unit and the mobile display device; a second memory unit coupled to the housing and comprising ultrasound image acquisition software stored thereon, wherein the ultrasound image acquisition software comprises instructions for: copying at least a portion of the ultrasound image acquisition software to the first memory unit of the mobile display device; receiving inputs via the touch screen display; controlling the ultrasound transducer array based on the received inputs to obtain ultrasound image data; using the CPU of the mobile display device to generate ultrasound images based on the ultrasound image data; and outputting the ultrasound images to the touch screen display, wherein the ultrasound acquisition assembly is operable to execute the instructions of the ultrasound image acquisition software only when the docking unit and the mobile display device are coupled.

2. The system of claim 1, wherein the docking unit further comprises a signal processor configured to process beamformed image signals received from the beamformer, and to generate the ultrasound image data based on the beamformed image signals.

3. The system of claim 1, wherein the docking unit further comprises a further input device for receiving a user input to command the portable ultrasound imaging system.

4. The system of claim 1, wherein at least the beamformer and the second memory unit are disposed in the housing.

5. The system of claim 1, wherein the ultrasound image acquisition assembly further comprises a probe head that comprises the transducer array.

6. The system of claim 5, wherein the probe head is cable-connected to the docking unit.

7. The system of claim 1, wherein the ultrasound transducer array is attached to the housing such that the ultrasound transducer array and the docking unit form a single component.

8. The system of claim 1, wherein the ultrasound image acquisition assembly further comprises an adapter unit, wherein the communication interface is configured as a plug and socket connection, and wherein the adapter unit is configured to enable connection of a particular type of mobile display device to the communication interface.

9. The system of claim 1, wherein the docking unit is configured to conform to a shape of the mobile display device such that the docking unit is configured to removably couple to the mobile display device.

10. The system of claim 1, wherein the mobile display device is configured to identify, to the docking unit, the mobile display device as valid when the mobile display device is connected to the docking unit.

11. The system of claim 1, wherein the communication interface is configured to establish communication with the mobile display device using an industry standard wired interface.

12. The system of claim 1, wherein the communication interface is configured to establish communication with the mobile display device using a wireless interface.

13. The system of claim 1, wherein the docking unit further comprises a battery disposed within the housing and configured to provide electrical power to the ultrasound transducer array and the beamformer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment(s) described hereinafter. In the following drawings

[0035] FIG. 1 shows a schematic illustration of an application of an ultrasound imaging system,

[0036] FIG. 2 shows a schematic block diagram of an ultrasound imaging system and of an ultrasound image acquisition system connectable to a mobile display device,

[0037] FIG. 3 shows an ultrasound imaging system with an ultrasound image acquisition station connected to a mobile display device of a tablet type personal computer, and

[0038] FIG. 4 shows an ultrasound imaging system comprising an ultrasound image acquisition station connected to a clamshell type personal computer.

DETAILED DESCRIPTION OF THE INVENTION

[0039] FIG. 1 shows an ultrasound imaging system 10. The ultrasound imaging system 10 is used for scanning an area or volume of the body of the patient 12.

[0040] For scanning the patient 12, a probe head 14 may be provided. The probe head 14 is connected to a docking unit 16 of the ultrasound imaging system 10. The docking unit 16 serves not only for connecting the probe head 14 but also for connecting a mobile display device 18. While the mobile display device 18 is connected to the docking unit 16 via a cable shown in FIG. 1, it is contemplated that the mobile display device 18 is connected to the docking unit 16 via a plug and socket connection, or may be easily connected in a wireless manner to the docking unit 16.

[0041] The docking unit 16 may comprise a first input device 20. The first input device 20 may have a keypad 22 and/or a trackball 24 to provide an input mechanism to a user of the ultrasound imaging system 10. Additionally or alternatively, other mechanisms may be present in the first input device 20 to enable a user to control the ultrasound imaging system 10.

[0042] Further, the mobile display device 18 comprises a display unit 26 to display display data generated by the ultrasound imaging system to the user. By this, the area or volume of the patient 12 that is scanned via the probe head 14 can be viewed on the display unit 26 by the user of the ultrasound imaging system 10. Further, the mobile display device 18 comprises a second input device 28 that may provide additional control possibilities to the user. The second input device may for example be the display unit being provided as a touch screen or additional buttons present on the mobile display device 18.

[0043] The mobile display device 18 may be any computational hardware device that may be carried by a user. In particular, the mobile display device 18 may be a cell phone, a PDA (Personal Digital Assistant), a clamshell type personal computer or a tablet type personal computer.

[0044] The mobile display device 18 may be connected and disconnected to the docking unit 16 by the user of the ultrasound imaging system 10. When disconnected from the docking unit 16, the mobile display device 18 may be run with its own operating system providing all kinds of general purpose applications or medical applications to the user. Further, upon docking the mobile display device 18 to the docking unit 16, the operating system of the mobile display device 18 is bypassed and an operating system of the ultrasound imaging system 10 stored in the docking unit 16 is automatically booted from a hibernated state. This alternative operating system immediately takes over control of the mobile display device 18 and provides the user with a fully functioning ultrasound imaging system 10 using the hardware resources of the mobile display device 18.

[0045] In a further embodiment, it is also possible that the probe head 14 and the docking unit 16 form a single entity, i.e. are contained within the same housing. Hence, the probe head 14 and the docking unit may form a single package in a probe housing.

[0046] FIG. 2 shows a schematic block diagram as an example for the various components of the ultrasound imaging system 10 and their location and interaction within the whole ultrasound imaging system 10.

[0047] As already explained above, the ultrasound imaging system 10 is used for scanning an area or volume 30 of a patient 12. The area or volume is schematically shown in dashed lines and designated with reference numeral 30. The area or volume 30 is examined via the probe head 14 carrying a transducer array 32. The transducer array 32 may be of any known type. Hence, the transducer array 32 may be a one-dimensional transducer array or a two-dimensional transducer array that may be mechanically or electronically scanned. The transducer array 32 converts the ultrasound signals into electronic signals and vice versa.

[0048] To command the transducer array 32, a beam former 34 is present that is used to control the electronic and/or mechanical scanning of the transducer array and, if possible, the number, density and position of scan lines along which the area or volume 30 is scanned. Further, a signal processor may be provided that receives the ultrasound receive signal of the beam former and provides an image signal. The beam former 34 and the signal processor 36 together may form an image acquisition hardware 37. Further, there is provided a first memory unit 38 having stored thereon a first operating system that operates all hardware of the ultrasound imaging system 10 in ultrasound imaging applications only.

[0049] The mobile display device 18 comprises a central processing unit 40 for controlling the beam former 34, an image processor 42 and/or the signal processor 36. In any embodiment, the beam former 34, the signal processor 36 and the image processor 42 may also be of a software-implemented type being part of the first operating system 38 and run on the central processing unit 40. In case one of the group of the signal processor 36, the beam former 34 and the image processor 42 is of a hardware-implemented type, the location of the respective circuitry is preferably as shown in FIG. 2. However, it might also be the case that hardware circuitry shown as part of the docking unit 16 may be present on the mobile display device 18, or hardware components as present on the mobile display device 18 may be part of the docking unit 16.

[0050] The image processor 42 receives image data from the signal processor 36 and provides display data to the display 26. The beam former 34, the signal processor 36 and the image processor 42 may be run by the central processing unit 40.

[0051] Further, the mobile display device 18 carries a second memory unit 44 having stored thereon a second operating system to run the mobile display device in a general purpose state. By this, if disconnected from the docking unit 16, the mobile display device 18 can be used by a user for any application. Connected to docking unit 16, the first operating system stored on the first memory unit 38 takes over control of the central processing unit 40 and/or hardware resources of the ultrasound imaging system 10.

[0052] The first memory unit 38 and the second memory unit 44 may comprise at least one hard disk, for example a solid state drive (SSD), and may further comprise at least one random access memory (RAM) device.

[0053] In any case, the probe head 14 and the docking unit 16 together form an ultrasound image acquisition station 46. This ultrasound image acquisition station 46 is capable of being connected to a console portion 48 of the ultrasound imaging system 10 in which console portion 48 is formed by the mobile display device 18. In a further embodiment, the ultrasound image acquisition station 46 may be formed in a single housing. Hence, the transducer array 32, the beam former 34 and the signal processor 36 may all be located in the same housing as the probe head 14. Further, the first memory unit 38 can also be located within that housing.

[0054] To enable the connection of the mobile display device 18 to the ultrasound image acquisition station 46, there is provided an interface assembly 50, preferably in the form of a plug and socket connection. An interface assembly 50 forms part of the ultrasound image acquisition station 46 to receive a mobile display device 18 for docking. To ensure that only proper mobile display devices 18 are connected to the ultrasound image acquisition station 46, the mobile display device 18 may comprise a signature unit 52 for identifying a valid mobile display device 18 to the ultrasound image acquisition station 46.

[0055] To properly connect a mobile display device 18 to the docking unit 16, an adapter unit 54 may be provided that may serve as a frame and/or guidance to insert and hold the mobile display device 18 within docking unit 16. Further, via the adapter unit 54, a flush arrangement of the mobile display device 18 within the docking unit 16 may be provided to facilitate operation of the ultrasound imaging system 10.

[0056] FIG. 3 shows a sketch of a possible practical embodiment of the ultrasound imaging system 10 and its components. The docking unit 16 has a schematically depicted plug and socket connection 56 to provide the data connection to the mobile display device 18. In the embodiment shown in FIG. 3, the mobile display device is a tablet type personal computer. The probe head 14 is attached via cable 58 to the docking unit 16. However, even two or more probe heads 14 may be attached to the docking unit 16. The docking unit 16 has an L-shaped cross section with a relatively long feature comprising the docking unit 54 and the first input device 20 and a short feature which comprises the interface for connecting the probe head 14. Both features are connected via a hinge, so that the docking unit 16 may be put into a convenient position.

[0057] The docking unit 16 is a compact portable low cost secure and versatile module that may convert any mobile tablet PC into a feature rich ultrasound scanner in particular aimed at the lower end market segment. It consists of an ergonomic frame and the mobile display device 18 may snap-lock into the plug and socket connection 56. The docking unit may contain an optionally battery part image acquisition hardware 37. The operating system stored on the mobile display device may for example be a Windows operating system, an Android operating system or an iPhone iOS operating system.

[0058] The probe head 14 may comprise a transducer array 32 of any known type, for example it may be a linear, curved linear array (CLA), sector or endo-cavity type transducer array. The ultrasound image acquisition station 46 may contain an auxiliary battery that may supplement a battery present in the mobile display device. By this, the ultrasound imaging system may be allowed for scanning over a time period of several hours. Further, a power receptable may be present that may provide a DC input from an AC wall adapter to allow the system to scan without time limit.

[0059] Further, the docking unit may provide a video output and port expansion such as WiFi and LAN. It may contain a 100 and more Gigabyte solid state drive (SSD) hard disk as the first memory unit having stored the operating system of the ultrasound imaging system 10 stored thereon. Further, the first memory unit 38 may provide image data storage capacity. The mobile display device itself may provide for example WiFi and Bluetooth connections. The docking unit 16 may be designed to be portable, weighing less than 2 kg. While scanning a body of a patient, the docking unit 16 may be laid on a relatively flat surface or mounted on a stand or on the wall.

[0060] The mobile display device may for example be run by Dual Core Atom Processor commercially available from the Intel company, Santa Clara, USA. However, any other central processing unit may be present. If not connected to the docking unit, the mobile display device may be an open system to suit any users' needs, for example web browsing, e-mail, other medical applications, video, personal instant messaging, work processing, etc. A user may be free to install additional software and upgrade the mobile display device. In particular, the mobile display device may meet the typical specifications of the standard Medical Clinical Assistant architecture. Such an architecture may be present to provide tablet PC infrastructure for the use of medical personnel at clinics.

[0061] When the mobile display device 18 is docked to the docking unit 16, however, the ultrasound image acquisition station 46 takes over all of the mobile display devices, hardware resources and bypasses the second operating system 44 within the mobile display device. This is accomplished by booting again from the first memory unit 38 in the ultrasound image acquisition station 46. An option may be provided to copy images stored on the first memory unit 38 to the mobile display device's second memory unit 44 for review when the mobile display device 18 is disconnected from the docking unit 16. Without the mobile display device, the docking unit 16 may not boot from its internal memory unit 38 and will not power the probe head 14. Such a mechanism may ensure that only skilled personnel may operate the ultrasound imaging system 10.

[0062] Further, the ultrasound imaging system 10 may be configured such that upon connection of the mobile display device 18 to the docking unit 16 the first operating system is booted from the first memory unit 38 in the docking unit 16, the second operating system in the mobile display device 18 is bypassed, and at least a portion of the first operating system is copied to a volatile memory, for example a RAM device of the second memory unit 44, of the mobile display device 18 under control of the first operating system of the image acquisition assembly 46. By this, an ultrasound imaging program can be executed more efficiently, without requiring frequent access to the first memory unit 38 of the image acquisition assembly 46 over the interface assembly 50 between the image acquisition assembly 46 and the mobile display device 18. Copying a portion of the first operating system of the ultrasound imaging system 10 to a volatile memory or RAM device of the second memory unit 44 of the mobile display device 18 has no effect on the un-docked operation of the mobile display device 18. The advantage of doing so is that the interface link between the image acquisition assembly 46 and the mobile display device 18 may then have a lower transfer rate, e.g. in Mbits/sec, than would normally be required for the frequent access by the first operating system to its source memory in the first memory unit 38. This may be particularly useful if an USB 2.0 standard is used for the interface assembly 50.

[0063] However, if for example USB 3.0 is used as a standard for the interface assembly 50, this would offers about ten times the transfer rate of USB 2.0. Hence using USB 3.0 could obviate the copying of at least a portion of the first operating system into the second memory unit 44, in particular the RAM, of the mobile display device 18, and allow the mobile display device 18 to access the first memory unit 32 in the ultrasound image acquisition station 46 continuously.

[0064] As commercially available mobile display devices 18 change over the time, the adapter unit 54 is provided at the docking unit 16. The adapter unit 54 may be exchanged within the docking unit. The adapter unit 54 is designed to conform to the outside plastics of the mobile display device. The adapter may not be removable by the user but only by skilled personnel. The adapter unit may also contain the corresponding plug and socket connection 56. Such a connection may join power, USB, PCIe, LAN and video signals to the docking unit, so all components of the mobile display device 18 and the ultrasound image acquisition station 46 may be exchanged via the interface assembly 50 provided by the plug and socket connection. Further external connectors may be provided on the docking unit 16, for example a power jack, LAN, video and USB.

[0065] In general, the mobile display device 18 may remain locked to the docking unit 16 over a larger time period to provide for a stationary ultrasound imaging system 10.

[0066] As shown in FIG. 4, the mobile display device 18 must not necessarily be a tablet personal computer but could alternatively be in the form of a clamshell type personal computer. It may also be a kind of a cell phone, smart phone or personal digital assistant.

[0067] In general, the contemplated embodiments provide for a compact design with small dimensions and a low weight. The ultrasound imaging system 10 is portable and may be hand-carried but also laid on a surface while operating. It may also be permanently mounted to a rolling stand. The mobile display device 18 may serve as a user's own personal device or, when connected to the ultrasound image acquisition station 46, as a dedicated ultrasound scanner. The operating system may be set in a way that the ultrasound software application and data are entirely separate from the user's software and data. The mobile display device 18 may be locked to the docking unit 16 for physical security. Alternatively, the mobile display device 18 can be removed and secured separately to protect its replacement value or its data. Via the signature unit 52, the ultrasound image acquisition station 46 may only operate when connected to a valid mobile display device 18. Further, the ultrasound imaging system 10 may be provided at low cost since the mobile display device 18 may be one of commercially available mobile display devices produced in high numbers.

[0068] While the invention has been illustrated and described in detail in the drawings and foregoing description, such illustration and description are to be considered illustrative or exemplary and not restrictive; the invention is not limited to the disclosed embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.

[0069] In the claims, the word comprising does not exclude other elements or steps, and the indefinite article a or an does not exclude a plurality. A single element or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0070] A computer program may be stored/distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with or as part of other hardware, but may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems.

[0071] Any reference signs in the claims should not be construed as limiting the scope.