Imaging chain with miniaturized C-arm assembly for mobile X-ray imaging system

• US 5,642,395 A
• Filed: 08/07/1995
• Issued: 06/24/1997
• Est. Priority Date: 08/07/1995
• Status: Expired due to Term

• Current Assignee: GE Medical Systems Global Technology Company LLC (GE Healthcare Technologies, Inc.)
• Original Assignee: OEC Medical Systems Incorporated (GE Healthcare Technologies, Inc.)
• Inventors: Curtis, Steven E., Anderton, R. Larry, Spratt, R. Bruce
• Primary Examiner(s): Porta, David P.
• Application Number:
  US08/511,755
• Time in Patent Office: 687 Days
• Field of Search: 378/98.2, 378/98.6, 378/98.7, 378/98.3, 378/193, 378/196, 378/197, 378/198
• US Class Current: 378/198
• CPC Class Codes: A61B 6/4225 using image intensifiers
• CPC Class Codes: A61B 6/4441 the rigid structure being a C-arm or U-arm

Abstract

A miniaturized C-arm and imaging apparatus for use with X-ray diagnostic equipment and the like. An X-ray imaging system is coupled to a C-arm, including an X-ray source and an image receptor mounted upon opposing locations, respectively on the C-arm. The image receptor includes a vacuum bottle type image intensifier. The image receptor is characterized by an absence of fiber optic device, and the image intensifier is characterized by an absence of micro channels therein. The C-arm is mass balanced about an axis of orbital rotation and is pivotally coupled to an articulating arm assembly supported upon a wheeled support base. The mass balance enables repositioning of the X-ray imaging system between an anterior-posterior view and an orthogonal lateral view with a single, orbital movement of the C-arm which also causes the views to define an imaging isocenter. The C-arm is preferably miniaturized to an approximate outside diameter of twenty-eight inches with a source-to-image distance of approximately fourteen inches.

Claims

1. A miniaturized support arm and imaging apparatus for use with X-ray diagnostic equipment, comprising:

a support assembly comprising holding means and an X-ray source and an image receptor mounted upon opposing locations, respectively, on the holding means such that said X-ray source and image receptor define a source-to-image distance therebetween, and also including a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor;

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm, and wherein the C-arm assembly and the support arm have a collective center of mass and are collectively mass balanced about the axis of lateral rotation such that said collective center of mass substantially coincides with said axis of lateral rotation for any rotational position of the support am relative to the articulating arm means about said axis of lateral rotation;

articulating arm means pivotally attached to the support assembly such that the support assembly is selectively rotatable relative to said articulating arm means about a lateral axis of rotation, and wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions; and

mobile base support means pivotally attached to the articulating arm means for supporting the support assembly in a suspended position, said mobile base support means being moveable along a floor;

wherein the image receptor comprises;

an input means having an input area for receiving X-rays and producing electrons from said X-rays;

output means having an output area for receiving the electrons and producing light therefrom; and

image intensification means for accelerating the electrons from the input means to the output means while maintaining said electrons under vacuum so as to produce an optical image from said electrons, said image intensification means including a vacuum bottle and focusing electrodes coupled to said vacuum bottle.

2. The apparatus as defined in claim 1, wherein the input means includes means for arranging the electrons into a first ordered array of electrons, and wherein the focusing electrodes are configured and arranged and powered in a manner sufficient to draw the electrons toward the output means and rearrange the electrons into an inverted array relative the first ordered array.

3. The apparatus as defined in claim 1, said apparatus being characterized by an absence of fiber optic devices.

4. The apparatus as defined in claim 1, wherein the image intensification means is characterized by an absence of micro channels therein.

5. The apparatus as defined in claim 1, wherein the input area has a diameter less than six inches.

6. The apparatus as defined in claim 5, wherein the input area has a diameter within a range of four inches to six inches.

7. The apparatus as defined in claim 1, wherein the input means includes means for arranging the electrons into a first ordered array of electrons having a first area, and wherein the focusing electrodes are configured, arranged and powered in a manner sufficient to operate as minification means for rearranging the electrons into a second ordered array of electrons having an area reduced in size relative to said first area.

8. The apparatus as defined in claim 1, wherein the support arm and the C-arm each include a first side panel, and wherein the mobile base support means includes a front section and a side section which collectively form a corner section therebetween, and wherein the articulating arm means is pivotally attached to the base support means at a first pivot point of attachment, and wherein the C-arm assembly and the articulating arm means and the support arm are configured and pivotally interconnected so as to be pivotally manipulable into a compact arrangement such that (i) the articulating arm means extends from the first pivot point of attachment across at least a portion of the front section of the base support means to the corner section so as to reside closely adjacent to said front section, and (ii) the support arm extends from a portion of the articulating arm means adjacent the corner section across at least a portion of the side section of the base support means such that the first side panels of the support arm and C-arm reside closely adjacent to said side section, such that the articulating arm means and the support arm collectively extend across at least a portion of the front section, around the corner section, and across at least a portion of the side section.

9. The apparatus as defined in claim 1, wherein the C-arm assembly has a center of mass and is mass balanced about the single axis of orbital rotation such that the center of mass substantially coincides with the single axis of orbital rotation for any position of said C-arm assembly relative to the support arm along the circular movement track.

10. The apparatus as defined in claim 1,

wherein the support arm and the C-arm each include a first side panel, and wherein the base support means includes a front section and a side section which collectively form a corner section therebetween, and wherein the articulating arm means comprises a first arm and a second arm pivotally attached to both the first arm and the support arm, said second arm being pivotally attached to the front section of the base support means at a first pivot point of attachment, and wherein the C-arm assembly and the articulating arm means and the support arm are configured and pivotally interconnected so as to be pivotally manipulable into a compact arrangement such that (i) the first arm extends from the first pivot point of attachment across at least a portion of the front section of the base support means so as to reside closely adjacent to said front section, and (ii) the second arm extends from the first arm across at least a portion of the front section of the base support means to the corner section so as to reside closely adjacent to said front section, and (iii) the support arm extends from a portion of the second arm adjacent the corner section across at least a portion of the side section of the base support means such that the first side panels of the support arm and curved member reside closely adjacent to said side section, such that the second arm and the support arm collectively extend across at least a portion of the front section, around the corner section, and across at least a portion of the side section.

11. The apparatus as defined in claim 1, wherein the C-arm assembly is configured and dimensioned such that the source-to-image distance is less than thirty inches.

12. The apparatus as defined in claim 1, wherein the C-arm assembly is configured and dimensioned such that the source-to-image distance is less than twenty inches.

13. The apparatus as defined in claim 1, wherein the C-arm assembly is configured and dimensioned such that the source-to-image distance is less than fifteen inches.

14. The apparatus as defined in claim 1, wherein the articulating arm means comprises parallel linkage means for moving the support assembly relative to the base support means from a first position to a second position such that the axis of lateral rotation in the second position is substantially parallel in direction to the axis of lateral rotation in the first position.

15. The apparatus as defined in claim 1, wherein the C-arm assembly is configured and arranged, in combination with the circular movement track having a sufficient length, to enable the C-arm assembly to be moveable along the circular movement track in orbital rotation between a first orbital position and a second orbital position such that the central beam in the second orbital position extends in a direction orthogonal to the central beam in the first orbital position.

16. The apparatus as defined in claim 15, wherein the central beam in the second orbital position passes through a first point of intersection of the central beam in the first orbital position.

17. The apparatus as defined in claim 16, wherein the C-arm assembly is configured and arranged such that the first point of intersection of the central beam resides closer to the image receptor than to the X-ray source.

18. The apparatus as defined in claim 15, wherein the C-arm assembly is configured and arranged such that the central beam extends substantially vertically in the first orbital position and substantially horizontally in the second orbital position.

19. The apparatus as defined in claim 18, wherein the C-arm assembly is configured and arranged such that the central beam in the second orbital position substantially coincides with the axis of lateral rotation.

20. The apparatus as defined in claim 1, wherein the support arm is pivotally attached and configured relative to the articulating arm means to enable the C-arm assembly to rotate about the axis of lateral rotation between a first lateral position and a second lateral position such that the central beam in the second lateral position extends in a direction orthogonal to the central beam in the first lateral position.

21. The apparatus as defined in claim 20, wherein the central beam in the second lateral position passes through a second point of intersection of the central beam in the first lateral position.

22. The apparatus as defined in claim 21, wherein the C-arm assembly is configured and arranged such that the second point of intersection of the central beam resides closer to the image receptor than to the X-ray source.

23. The apparatus as defined in claim 20, wherein the C-arm apparatus is configured and arranged such that the central beam extends substantially vertically in the first lateral position and substantially horizontally in the second lateral position.

24. The apparatus as defined in claim 1, wherein the mobile base support means comprises a base and wheels rotatably mounted beneath the base to enable the base to roll on the wheels along a floor.

25. The apparatus as defined in claim 1, wherein the circular movement track has a radius which is less than twenty inches.

26. The apparatus as defined in claim 25, wherein the radius of the circular movement track is less than fifteen inches.

27. The apparatus as defined in claim 1, wherein the C-arm includes a circular inner circumference having a radius of less than nineteen inches.

28. The apparatus as defined in claim 27, wherein the radius of the circular inner circumference is less than fourteen inches.

29. A miniaturized support arm and imaging apparatus for use with X-ray diagnostic equipment, comprising:

a support assembly comprising holding means and an X-ray source and an image receptor mounted upon opposing locations, respectively, on the holding means such that said X-ray source and image receptor define a source-to-image distance therebetween, and also including a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor;

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm, and wherein the C-arm assembly and the support arm have a collective center of mass and are collectively mass balanced about the axis of lateral rotation such that said collective center of mass substantially coincides with said axis of lateral rotation for any rotational position of the support arm relative to the articulating arm means about said axis of lateral rotation;

an articulating arm assembly comprising articulating arm means pivotally attached to the support assembly such that the support assembly is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions, and wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions; and

mobile base support means pivotally attached to the articulating arm means for supporting the C-arm assembly in a suspended position, said mobile base support means being moveable along a floor;

wherein the image receptor comprises;

an input means having an input area for receiving X-rays and producing electrons from said X-rays;

output means having an output area for receiving the electrons and producing light therefrom; and

image intensification means for accelerating the electrons from the input means to the output means while maintaining said electrons under vacuum so as to produce an optical image from said electrons, wherein the image intensification means is characterized by an absence of micro channels therein.

30. The apparatus as defined in claim 29, wherein the support assembly comprises:

a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor; and

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm;

wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions;

wherein the support arm and the C-arm each include a first side panel, and wherein the mobile base support means includes a front section and a side section which collectively form a corner section therebetween, and wherein the articulating arm means is pivotally attached to the base support means at a first pivot point of attachment, and wherein the C-arm assembly and the articulating arm assembly and the support arm are configured and pivotally interconnected so as to be pivotally manipulable into a compact arrangement such that (i) the articulating arm means extends from the first pivot point of attachment across at least a portion of the front section of the base support means to the corner section so as to reside closely adjacent to said front section, and (ii) the support arm extends from a portion of the articulating arm means adjacent the corner section across at least a portion of the side section of the base support means such that the first side panels of the support arm and C-arm reside closely adjacent to said side section, such that the articulating arm means and the support arm collectively extend across at least a portion of the front section, around the corner section, and across at least a portion of the side section.

31. The apparatus as defined in claim 29, wherein the support assembly comprises:

a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor; and

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm;

wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions;

wherein the support arm and the C-arm each include a first side panel, and wherein the base support means includes a front section and a side section which collectively form a corner section therebetween, and wherein the articulating arm means comprises a first arm and a second arm pivotally attached to both the first arm and the support arm, said second arm being pivotally attached to the front section of the base support means at a first pivot point of attachment, and wherein the C-arm assembly and the articulating arm means and the support arm are configured and pivotally interconnected so as to be pivotally manipulable into a compact arrangement such that (i) the first arm extends from the first pivot point of attachment across at least a portion of the front section of the base support means so as to reside closely adjacent to said front section, and (ii) the second arm extends from the first arm across at least a portion of the front section of the base support means to the corner section so as to reside closely adjacent to said front section, and (iii) the support arm extends from a portion of the second arm adjacent the corner section across at least a portion of the side section of the base support means such that the first side panels of the support arm and curved member reside closely adjacent to said side section, such that the second arm and the support arm collectively extend across at least a portion of the front section, around the corner section, and across at least a portion of the side section.

32. A miniaturized support arm and imaging apparatus for use with X-ray diagnostic equipment, comprising:

a support assembly comprising holding means and an X-ray source and an image receptor mounted upon opposing locations, respectively, on the holding means such that said X-ray source and image receptor define a source-to-image distance therebetween, and also including a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor;

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm, and wherein the C-arm assembly and the support arm have a collective center of mass and are collectively mass balanced about the axis of lateral rotation such that said collective center of mass substantially coincides with said axis of lateral rotation for any rotational position of the support arm relative to the articulating arm means about said axis of lateral rotation;

articulating arm means pivotally attached to the support assembly such that the support assembly is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions, and wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions;

mobile base support means pivotally attached to the articulating arm means for supporting the support assembly in a suspended position, said mobile base support means being moveable along a floor; and

wherein the image receptor is characterized by an absence of fiber optic devices.

33. The apparatus as defined in claim 32, wherein the support assembly comprises:

a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor; and

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm;

wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions;

wherein the support arm and the C-arm each include a first side panel, and wherein the mobile base support means includes a front section and a side section which collectively form a corner section therebetween, and wherein the articulating arm means is pivotally attached to the base support means at a first pivot point of attachment, and wherein the C-arm assembly and the articulating arm means and the support arm are configured and pivotally interconnected so as to be pivotally manipulable into a compact arrangement such that (i) the articulating arm means extends from the first pivot point of attachment across at least a portion of the front section of the base support means to the corner section so as to reside closely adjacent to said front section, and (ii) the support arm extends from a portion of the articulating arm means adjacent the corner section across at least a portion of the side section of the base support means such that the first side panels of the support arm and C-arm reside closely adjacent to said side section, such that the articulating arm means and the support arm collectively extend across at least a portion of the front section, around the corner section, and across at least a portion of the side section.

34. The apparatus as defined in claim 32, wherein the support assembly comprises:

a C-arm assembly including a C-arm having a substantially circular movement track formed thereon, wherein the X-ray source and image receptor are mounted upon opposing locations, respectively, on the C-arm such that said X-ray source and image receptor define a source-to-image distance therebetween, wherein the X-ray source includes means for projecting X-rays having a central beam onto the image receptor; and

a support arm disposed in slidable engagement with the circular movement track of the C-arm such that the C-arm assembly is selectively slidable relative to said support arm in orbital rotation about a single axis of orbital rotation, said circular movement track being substantially common to a circle having a center point which coincides with said single axis of orbital rotation such that said single axis of orbital rotation remains substantially fixed relative to the support arm for any position of the C-arm assembly relative to said support arm;

wherein the articulating arm means is pivotally attached to the support arm such that the support arm is selectively rotatable relative to said articulating arm means about an axis of lateral rotation to selected lateral positions;

wherein the support arm and the C-arm each include a first side panel, and wherein the base support means includes a front section and a side section which collectively form a corner section therebetween, and wherein the articulating arm means comprises a first arm and a second arm pivotally attached to both the first arm and the support arm, said second arm being pivotally attached to the front section of the base support means at a first pivot point of attachment, and wherein the C-arm assembly and the articulating arm means and the support arm are configured and pivotally interconnected so as to be pivotally manipulable into a compact arrangement such that (i) the first arm extends from the first pivot point of attachment across at least a portion of the front section of the base support means so as to reside closely adjacent to said front section, and (ii) the second arm extends from the first arm across at least a portion of the front section of the base support means to the corner section so as to reside closely adjacent to said front section, and (iii) the support arm extends from a portion of the second arm adjacent the corner section across at least a portion of the side section of the base support means such that the first side panels of the support arm and curved member reside closely adjacent to said side section, such that the second arm and the support arm collectively extend across at least a portion of the front section, around the corner section, and across at least a portion of the side section.