Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
  • A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
  • A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B5/00—Measuring for diagnostic purposes; Identification of persons
  • A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
  • A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
  • A61B5/0013—Medical image data
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
  • A61B6/44—Constructional features of apparatus for radiation diagnosis
  • A61B6/4494—Means for identifying the diagnostic device
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
  • A61B6/54—Control of apparatus or devices for radiation diagnosis
  • A61B6/545—Control of apparatus or devices for radiation diagnosis involving automatic set-up of acquisition parameters
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
  • A61B6/54—Control of apparatus or devices for radiation diagnosis
  • A61B6/548—Remote control of the apparatus or devices
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
  • A61B6/56—Details of data transmission or power supply, e.g. use of slip rings
  • A61B6/563—Details of data transmission or power supply, e.g. use of slip rings involving image data transmission via a network
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
  • A61B6/58—Testing, adjusting or calibrating thereof
  • A61B6/586—Detection of faults or malfunction of the device
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W84/00—Network topologies
  • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
  • H04W84/10—Small scale networks; Flat hierarchical networks
  • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

• This invention relates generally to digital imaging applications, and in particular to methods and apparatus for associating a digital detector with an imaging apparatus.
• Wireless image transfer offers a number of benefits in diagnostic imaging applications.
• the capability to position a digital image detector at an appropriate position relative to the subject that is to be imaged and to obtain an image without the complication of routing a connecting cable between the image detector and a computer or other host processor, has a number of advantages. For example, this capability helps to simplify operator procedures and workflow and to reduce patient discomfort.
• the wireless transfer feature provides advantages for various types of radiography imaging, in which an image is formed according to exposure energy directed through a tooth or other structure, as well as for image capture using visible or near- visible light.
• Dental imaging is one area where wireless image transfer has particular value.
• the technologist or other practitioner who is performing the image capture function can work more quickly and encounters fewer constraints when positioning an intra-oral camera or radiography detector that is wireless.
• a small dental practice may have only one wireless radiography detector or intra-oral camera using wireless image transmission.
• a larger practice may use multiple wireless digital image detectors, such as one assigned to each dental treatment chair or grouping of chairs. With two or more detectors at a single location, the likelihood of confusion increases dramatically. Where there are two detectors, for example, each must be assigned to a specific receiving system or problems could result. Sharing the same detector or intra-oral camera between multiple treatment chairs is risky and care must be taken to properly coordinate how these devices and their data are deployed. In an extreme case, image data for a patient could be sent to the wrong receiving system, leading to incorrect diagnosis or even improper treatment.
• a further object of the present invention is to provide a method for configuring the wireless image data acquisition device for use in any treatment site within an environment with multiple access points.
• An advantage of the apparatus and methods of the present invention relates to the capability to readily share wireless imaging devices between multiple treatment sites, such as between multiple treatment rooms in a larger dental practice, for example.
• a method for directing image data to a dental treatment site executed at least in part on a computer system and comprising: positioning a sensor controller near a programmed radio-frequency identification device at the dental treatment site;
• FIG. 1 is a block diagram showing a wireless network arrangement with multiple wireless access points.
• FIG. 2 is a block diagram that shows the use of a wireless digital image detector apparatus where there is a single wireless access point.
• FIG. 3 is a block diagram showing a wireless digital image detector with associated elements in one embodiment of the present invention.
• FIG. 4 is a block diagram showing a wireless network arrangement with multiple wireless access points configured according to an embodiment of the present invention.
• FIG. 5 is a procedural flow diagram that shows RFID tag configuration for a site.
• FIG. 6 is a procedural flow diagram for daily operation of a wireless imaging detector system.
• FIG. 7 is a block diagram showing a wireless digital image detector with associated elements for transmitting data wirelessly to a host computer at the treatment site in an alternate embodiment of the present invention.
• FIG. 8 is a block diagram showing a wireless digital image detector with associated elements for transmitting data to a host computer at the treatment site in another alternate embodiment of the present invention.
• FIG. 1 shows an example network configuration in which multiple wireless access points 30a and 30b serve multiple dental treatment rooms or sites, labeled Al, A2, Bl, and B2.
• access point 30a serves treatment sites Al and A2 in area A
• access point 30b serves treatment sites B 1 and B2 in area B.
• This type of arrangement can be typical of a larger dental practice, for example, in which distances between treatment rooms are significant or where higher data throughput is desired.
• distance may not be a factor in determining the number or locations of access points 30a and 30b relative to the number of treatment rooms. If only small amounts of data were transferred, for example, a single access point might serve 4 or more treatment sites that originate images in a suitable manner, with acceptable response time for uploading and transferring the image data. However, since captured dental images can represent a sizable amount of data and because prompt image information delivery is most desirable, bandwidth considerations may dictate that only a few treatment rooms or sites be associated with a specific access point.
• FIG. 2 shows the configuration of image acquisition and display apparatus and path of image data for one of the treatment rooms, site A2 of Figure 1.
• An x-ray system 20 uses a digital sensor 22 as its detector element for receiving the exposure. This detector element is energizable for generating or acquiring the resulting image data.
• the acquired image data goes to a controller 24 that then transmits the data wirelessly to access point 30a, connected on a network 28.
• Access point 30a is also in communication with a host computer 32 that acts as a control monitor for operator command entry and also provides a display 34 in treatment site A2.
• Connection from access point 30a to host computer 32 is wireless in the example of Figure 2; alternately, a wired network connection, such as an Ethernet connection, for example, could be used for this data transfer link between the access point 30a and computer 32.
• a wireless connection is provided between controller 24 and access point 30a.
• Host computer 32 stores the received image data in a computer- accessible electronic memory 62 for subsequent display and processing.
• the term "memory”, in the context of the present disclosure can refer to any type of temporary or longer-lasting data storage workspace used for storing and operating upon image data in a computer system.
• the memory could be, for example, a long-term storage medium such as magnetic or optical storage.
• the memory could be an electronic circuit, such as random-access memory (RAM) that is used as a temporary buffer or workspace by a microprocessor or other control logic processor device.
• Display data for example, is typically stored in a temporary buffer and refreshed as needed in order to provide displayed data. This temporary storage buffer can also be considered to be a memory in this context.
• Figure 2 The general arrangement of Figure 2 is suitable when there is a single detector element, digital sensor 22, and a single controller 24 for a dental office or clinic.
• the use of multiple digital sensors 22 and multiple treatment sites at which images can be acquired complicates the data communication problem, making it necessary to assign the digital sensor 22 to a particular site, such as a treatment room, dental chair, or other specific location.
• a wireless identifier element such as a Radio-Frequency Identification (RFID) tag T is provided, assigned specifically to treatment site A2, such as attached to the wall of the room, to the treatment chair, or to the host computer 32 at that site, for example.
• RFID tag T is configured to communicate with a wireless communication device 26 that is provided in or associated with controller 24, as indicated by the antenna schematic symbol in Figure 3 and subsequent figures.
• RFID tag T identifies itself so that controller 24 can determine where to send the acquired image data from sensor 22. With this arrangement, the image data sent wirelessly to access point 30a from this location is then automatically directed to host computer 32 at treatment site A2.
• any of the treatment sites that are assigned to access point 30a as part of area A have the corresponding assignment to a specific host computer that is installed at or near the treatment site.
• images could also be transferred on the network to a host processor that serves the treatment site, including a host processor that is at a remote location and provides services such as short- or long-term image storage, for example.
• RFID devices such as RFID tags and RFID transponders
• RFID tags are well- known to those skilled in various device identification and tracking arts and are available in a number of types from a range of manufacturers.
• an RFID device or RFID "tag” is a programmable device that, upon excitation by the proper RFID signal, emits encoded data previously stored thereon.
• An RFID transponder is a device that provides two-way communication, writing identifying data to nearby RFID tags or other devices and interrogating these devices and reading stored data received from other sources.
• an RFID transponder in controller 24 transmits the obtained image data from sensor 22 to the corresponding access point 30a or 30b.
• FIG. 4 shows a network arrangement used at a dental clinic in which two access points 30a and 30 each handle data transfer from two treatment sites, Al and A2 for area A and Bl and B2 for area B. With such an arrangement, data acquisition at any site can be unambiguously handled and transferred to the appropriate host computer.
• Each access point has a unique Service Set Identifier (SSID) that is known to the host computers that use that access point.
• SSID Service Set Identifier
• the RFID tag T In order to encode the image data with the proper SSID for delivery to the correct site, the RFID tag T must be programmed to provide the SSID to the sensor 22 and controller 24 used at that site.
• An initial setup procedure is required in order to provide the SSID information that correlates the RFID tag T at any site to its corresponding access point.
• the workflow diagram of Figure 5 shows basic steps used as part of an initial setup procedure 40. Setup begins with a connection step 42 in which the user links or connects controller 24 to the host computer 32 at the site. Then, in an execution step 44, a software application running on host computer 32 acknowledges the controller connection and reports the SSID and any needed security key information to controller 24. In a write step 46, controller 24 then broadcasts the SSID, security key, and any other useful information for linking with the access point to RFID tag T. This programs RFID tag T with identifier information.
• the RFID tag T at a site can communicate with any nearby controller to provide assignment information so that the correct data is directed to host computer 32 at that site.
• the software application that is accessed at the site can be installed or downloaded to host computer 32 and configured to obtain the needed information for communication with that computer.
• the configuration can be automated or may require system administrator or user interaction for setup.
• RFID tag T is associated with controller 24 and wireless communication to this identifier element is provided from host computer 32.
• the block diagram of Figure 6 shows the procedural steps that can be used to set up the controller 24 and its digital sensor for use at a specific treatment site. These steps are used when the digital sensor 22 is first assigned to a treatment site or when sensor 22 is moved from one treatment site to another.
• the operator initiates controller 24 configuration by pressing a control button or by some other action that sends a command prompting a response from the nearby RFID tag T at the site.
• RFID tag T responds to this configuration command by providing its preprogrammed WiFi configuration information, such as the assigned SSID and any stored security keys that relate to the site, for example.
• Controller 24 reads this information in a tag ID receipt step 54.
• controller 24 reboots, or is rebooted or otherwise suitably re-configured in a configuration step 56. From this point until its next subsequent re-configuration, controller 24 now encodes the image data that it uploads using the obtained SSID in each obtain data step 60, thereby directing the image data to the appropriate treatment site.
• the obtained image data from digital sensor 22 is wirelessly transmitted directly to host computer 32 at the treatment site A2.
• controller 24 can be instructed by commands stored in RFID tag T or entered by the technician to provide image data directly to the site.
• This alternate mode of operation may be selectable using a selector switch 36 provided on controller 24 or sensor 22, for example. Operating the switch generates a command to redirect image data.
• Figure 8 shows an alternate embodiment in which RFID tag T is associated with controller 24 and wireless communication device 26 is linked to host computer 32. With this alternate arrangement, host computer 32 may have multiple wireless links, as shown. This alternate embodiment may be advantageous, for example, where it is desirable to send information from controller 24 and detector 22 both locally to host computer 32 for immediate use and to a remotely connected server for archival.
• Embodiments of the present invention allow a flexible network arrangement, so that additional treatment sites, host computers, and other equipment can be readily added to the system without undue complexity. Access point assignments can be modified with minimal setup time or risk of lost data. Image data can also be uploaded to a central host or server that provides storage or archival, allowing the dental practitioner to access a library of stored images obtained from a patient, for example.
• Embodiments of the present invention can be used to advantage for obtaining x-ray images for a patient, wherein the images can be displayed only moments after the exposure has been terminated.
• embodiments of the present invention may also serve other imaging applications, such as use of an intra-oral camera with a wireless interface, for example.
• An intra-oral camera can collect still or video images, using white light or other modality images, such as images from fluorescence or optical coherence tomography for example.
• a conventional digital camera may be used with this system, such as to obtain intra-oral images or images of external facial features.
• a sensor for dental ultrasound apparatus could also be used.
• Embodiments of the present invention employ software in the form of stored, preprogrammed instructions that are executed by a computer or other type of control logic processor.
• Stored instructions can be executed at any suitable host processor that is associated with the networked arrangement, such as on host computer 32 or on a processor that is associated with a digital camera, for example.
• instructions for uploading SSID and other information from the stored data in RFID tag T may be initiated using a user interface utility, such as a mouse-based selection, typed command entry, or touch screen contact.

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• 2010
  • 2010-10-07 EP EP10793038.0A patent/EP2624741B1/en not_active Not-in-force
  • 2010-10-07 WO PCT/IB2010/002952 patent/WO2012046092A1/en not_active Ceased
  • 2010-10-07 JP JP2013532279A patent/JP5805201B2/ja not_active Expired - Fee Related
  • 2010-10-07 US US13/878,072 patent/US9339246B2/en not_active Expired - Fee Related

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