Surgical probe apparatus and system

• US 9,671,504 B2
• Filed: 06/25/2009
• Issued: 06/06/2017
• Est. Priority Date: 06/25/2008
• Status: Active Grant

• Current Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Original Assignee: Devicor Medical Products Incorporated (Danaher Corporation)
• Inventors: McFerron, Richard
• Primary Examiner(s): COOK, CHRISTOPHER L
• Application Number:
  US12/491,505
• Publication Number:
  US 20090326371A1
• Time in Patent Office: 2,903 Days
• Field of Search: 600436
• CPC Class Codes: A61B 6/4258 for detecting non x-ray radiation, e.g. gamma radiation A61B6/037 takes precedence
• CPC Class Codes: G01T 1/161 Applications in the field of nuclear medicine, e.g. in vivo counting apparatus for radiation diagnosis A61B6/00

Abstract

A system for detecting and locating sources of radiation emissions. A hand-held probe includes a detector configured to generate a low-level electrical signal relating to a radiation source proximate the detector, and a probe wireless link configured to transmit a message containing gamma data relating to the low-level electrical signal. An instrumentation console includes a housing, an integral console wireless link within the housing and configured to receive the message transmitted by the probe wireless link, a receiver electrically coupled to the console wireless link to convert the message to corresponding electrical display signals, and a visually perceivable display electrically coupled to the receiver to convert the electrical display signals to a visually perceivable display relating to the amount of radiation detected.

Claims

1. A system for detecting and locating sources of radiation emissions, comprising:

a hand-held probe including;

a detector configured to generate a low-level electrical signal relating to gamma data emitted by a radiation source proximate the detector;

a preamplifier configured to amplify the low-level electrical signal to a corresponding output electrical signal representing the gamma data;

a controller configured to receive the output electrical signal, convert the output electrical signal to gamma data, and generate messages containing a predetermined number of bytes relating to the gamma data, and transmit the messages; and

a probe wireless link configured to receive the messages from the controller, periodically transmit the messages containing gamma data relating to the low-level electrical signal; and

an instrumentation console including;

a housing,

a console wireless link within the housing and configured to receive the messages periodically transmitted by the probe wireless link,

a receiver electrically coupled to the console wireless link to convert the received messages to corresponding electrical indication signals,

an indicator to convert the electrical indication signals to a perceivable indication relating to the amount of radiation detected, and

a signal processor coupled to the receiver, the signal processor configured to execute a smoothing function for processing the gamma data from the messages, wherein the smoothing function includes synchronizing the gamma count data into five millisecond time interval bins and averaging incoming gamma count data values over ten bins to derive a smoothed gamma count, and the console wireless link and the probe wireless link both being configured as transmitter-receivers for bidirectional communication of data.

2. The system of claim 1 wherein the probe wireless link and the console wireless link employ a radio frequency telecommunication protocol.

3. The system of claim 1 wherein the detector is a cadmium zinc telluride crystal.

4. The system of claim 1 wherein the detector is a cesium iodide scintillating device.

5. The system of claim 1 wherein the preamplifier is further configured to supply an electrical bias to the detector.

6. The system of claim 1, further comprising a universal asynchronous receiver/transmitter (UART) coupled to the console wireless link and to the receiver, the UART being configured to receive the message, convert the message to a serial data stream, and forward the serial data stream to the receiver.

7. The system of claim 1, wherein the indicator is an aural output configured to generate an aural signal relating to the gamma data.

8. The system of claim 1 wherein the console wireless link and the probe wireless link are both configured as at least one of radio frequency, visible light, infra-red light sonic and ultrasonic links.

9. The system of claim 1 wherein the indicator is a visually perceivable display electrically coupled to the receiver to convert the electrical signals to a visually perceivable indication relating to the amount of radiation detected.

10. The system of claim 1, wherein the hand-held probe further comprises:

a control switch in communication with the controller, the control switch being configured to allow adjustment of operating parameters relating to the gamma data generated by the probe, including at least one of a radiation target count and a calibration.

11. The system of claim 10, wherein the control switch is configured to allow adjustment of an operating parameter including a radiation target count.

12. The system of claim 1, wherein each of the messages comprises a start transmission character, a message type character, and the gamma data.

13. The system of claim 12, the gamma data being two bytes.

14. The system of claim 12, wherein each of the messages further comprises a checksum byte summing the other message bytes.

15. A system for detecting and locating sources of radiation emissions, comprising:

a hand-held probe including;

a cadmium zinc telluride detector crystal configured to generate a low-level electrical signal relating to gamma data emitted by a radiation source proximate the detector;

a preamplifier configured to amplify the low-level electrical signal to a corresponding output electrical signal representing the gamma data;

a controller configured to receive the output electrical signal, convert the output electrical signal to gamma data, and generate messages containing two bytes of information relating to the gamma data, and transmit the messages; and

an integral probe wireless link configured to receive the messages from the controller, periodically transmit the messages containing gamma data relating to the low-level electrical signal, the probe wireless link employing a radio frequency telecommunication protocol; and

an instrumentation console including;

a housing,

a console wireless link within the housing and configured to receive the message periodically transmitted by the probe wireless link, the console wireless link employing a radio frequency telecommunication protocol,

a receiver electrically coupled to the console wireless link to convert the messages to corresponding electrical display signals,

a visually perceivable display electrically coupled to the receiver to convert the electrical display signals to a visually perceivable indication relating to the amount of radiation detected, and

a signal processor coupled to the receiver, the signal processor configured to execute a smoothing function for processing the gamma data from the messages, wherein the smoothing function includes synchronizing the gamma count data into five millisecond time interval bins and averaging incoming gamma count data values over ten bins to derive a smoothed gamma count, and the console wireless link and the probe wireless link both being configured as transmitter-receivers for bidirectional communication of data.

16. The system of claim 15 wherein the instrumentation console further includes a signal processor electrically coupled to the receiver, the signal processor configured to be adjustable to establish a desired gamma data threshold to be displayed.

17. The system of claim 15, further comprising a universal asynchronous receiver/transmitter (UART) coupled to the console wireless link and to the receiver, the UART being configured to receive the message, convert the message to a serial data stream, and forward the serial data stream to the receiver.

18. The system of claim 15, wherein the hand-held probe further includes:

a control switch in communication with the controller, the control switch configured to allow adjustment of operating parameters relating to the gamma data generated by the probe, including at least one of a radiation target count, a time-interval accumulated count, and a calibration.

19. A method for detecting and locating sources of radiation emissions, comprising the steps of:

providing a hand-held probe having a detector, a preamplifier, a controller, a control switch in communication with the controller, and a probe wireless link configured to periodically transmit messages;

providing an instrumentation console having a housing, a console wireless link within the housing configured to receive the messages periodically transmitted by the probe wireless link, a receiver electrically coupled to the console wireless link, and a visually perceivable display electrically coupled to the receiver, the console wireless link and the probe wireless link are both configured as transmitter-receivers for bidirectional communication of data; and

placing the probe proximate a radiation source such that gamma radiation from the radiation source impinges upon the detector, the detector generating a low-level electrical signal relating to gamma data emitted by the radiation source, the preamplifier amplifying the low-level electrical signal to a corresponding output electrical signal representing the gamma data, the controller receiving the output electrical signal, converting the output electrical signal to gamma data, generating messages containing a predetermined number of bytes relating to the gamma data, and transmitting the messages to the probe wireless link, and

the probe wireless link receiving the messages from the controller, and periodically wirelessly transmitting the messages containing gamma data relating to the low-level electrical signal to the console wireless link, the receiver converting the messages to corresponding electrical display signal by executing a smoothing function, wherein the smoothing function includes synchronizing the gamma count data into five millisecond time interval bins and averaging incoming gamma count data values over ten bins to derive a smoothed gamma data count.

20. The method of claim 19, further comprising:

adjusting operating parameters relating to the gamma data generated by the probe using a control switch provided at the probe, the operating parameters including at least one of a radiation target count, a time-interval accumulated count, and a calibration.