Fluoro-assist feature for a diagnostic imaging device

• US 6,031,888 A
• Filed: 11/26/1997
• Issued: 02/29/2000
• Est. Priority Date: 11/26/1997
• Status: Expired due to Fees

• Current Assignee: Picker International, Inc. (Marconi Holdings Company Limited)
• Original Assignee: Picker International, Inc. (Marconi Holdings Company Limited)
• Inventors: Roos, Pieter Gerhard, Everett, Dennis K., Plut, Leonard F., Deucher, Joseph S., Ivan, Andrew J., Freeman, Kenneth L., Piscitelli, Marc
• Primary Examiner(s): Church, Craig E.
• Application Number:
  US08/979,571
• Time in Patent Office: 825 Days
• Field of Search: 378/4, 378/20, 378/195-198
• US Class Current: 378/20
• CPC Class Codes: A61B 6/4441 the rigid structure being a C-arm or U-arm
• CPC Class Codes: A61B 6/4464 the source unit or the detector unit being mounted to ceiling

Abstract

A frame (A) of a diagnostic imaging device such as a CT scanner or an MRI device has a bore defining a patient examination region (12). A first x-ray source (B) is mounted to a frame (C) for rotation around the examination region (12). An arc of first radiation detectors (14) detects x-rays which have traversed the examination region. A first image reconstruction processor (18) reconstructs a tomographic image representation from signals generated by the first radiation detectors. A fluoroscopy device (D) is mechanically coupled to the diagnostic scanner for generating and displaying at least substantially real-time fluoroscopic projection image representations on a display monitor (60). A second x-ray source (32) transmits x-rays to an amorphous silicon flat panel radiation detector (36). A second image reconstruction processor (58) reconstructs the fluoroscopic projection image representations from signals generated by the flat panel radiation detector (36). A C-arm (30) supports the second x-ray source (32) and the flat panel radiation detector (36) in a plane offset from a plane of the C-arm. A movable mounting structure (E) is mechanically connected with the gantry (A) and the C-arm (30) to move the C-arm between a stored position and an operating position adjacent the bore.

Claims

1. A diagnostic imaging apparatus comprising:

a frame defining an examination region;

a diagnostic imaging subsystem for generating first diagnostic image representations of an object when the object is positioned within the examination region;

a patient support adapted for movement through the examination region;

a fluoroscopic imaging subsystem for generating fluoroscopic image representations of the object, the fluoroscopic imaging subsystem including an x-ray source for transmitting x-rays, a flat panel image receptor for detecting the x-rays and generating signals indicative of the detected x-rays, and a support member for supporting the flat panel image receptor in a stored position remote from the patient support and an operating position proximate the patient support; and

a mounting structure secured to the frame for supporting the support member in the stored position and the operating position.

2. The diagnostic imaging apparatus of claim 1, wherein the flat panel image receptor includes a scintillating layer which coverts x-rays into light, and an amorphous silicon glass substrate supporting a plurality of photodiodes which convert the light generated by the scintillating layer into electrical signals.

3. The diagnostic imaging apparatus of claim 1, wherein the flat panal image receptor is offset from the support member by a first cantilevered arm, and the x-ray source is offset from the support member by a second cantilevered arm which secure the x-ray source to the support member.

4. The diagnostic imaging apparatus of claim 1, wherein the diagnostic imaging subsystem includes a Computerized Tomographic (CT) scanner.

5. The diagnostic imaging apparatus of claim 1, wherein the diagnostic imaging subsystem is a Magnetic Resonance Imaging (MRI) system.

6. The diagnostic imaging apparatus of claim 1, wherein:

the support member includes a C-arm; and

a centerline extending between the x-ray source and the flat panel image receptor intersects an orbital axis of the C-arm.

7. The diagnostic imaging apparatus of claim 6, wherein the mounting structure includes:

a support arm having a longitudinal track associated therewith;

a first upright support arm movably secured to the support arm for substantial horizontal movement along the track;

a second upright support arm movably secured to the first upright support arm for substantial vertical movement along a common longitudinal axis of the first and second upright support arms, the support member being rotatably supported by the second upright support arm.

8. The diagnostic imaging apparatus of claim 1, wherein:

the frame includes a stationary frame member having a bore therethrough which defines the examination region, and a rotating frame member rotatably supported by the stationary frame member for rotation about the examination region; and

the diagnostic imaging subsystem includes a second x-ray source for transmitting x-rays through the examination region, an arc of radiation detectors for detecting x-rays which have traversed the examination region and for generating signals indicative of the radiation detected, and an image reconstruction processor for reconstructing an image representation from the signals generated by the arc of radiation detectors.

9. A diagnostic imaging apparatus comprising:

a diagnostic imaging subsystem for generating first diagnostic image representations of an object when the object is positioned within an examination region;

a fluoroscopic imaging subsystem for generating fluoroscopic image representations of the object, the fluoroscopic imaging subsystem including an x-ray source for transmitting x-rays, a flat panel image receptor for detecting the x-rays and generating signals indicative of the detected x-rays, and a support member for supporting the flat panel image receptor in a stored position remote from the examination region and an operating position proximate the examination region; and

the flat panel image receptor being mounted in a housing having a first control panel proximate one end thereof and a second control panel proximate a second end thereof.

10. The diagnostic imaging apparatus of claim 9, wherein the support member includes a C-arm mounted to a mobile cart.

11. The diagnostic imaging apparatus of claim 9, wherein the fluoroscopy imaging subsystem operates in a radiographic mode to generate radiographic image representations.

12. The diagnostic imaging apparatus of claim 9, wherein the support member includes a C-arm.

13. The diagnostic imaging apparatus of claim 12, wherein the mounting structure includes means for permitting the C-arm to rotate through an arc of at least 180°

.

14. A diagnostic imaging apparatus comprising:

a frame having a bore defining an examination region;

a diagnostic imaging subsystem for generating first diagnostic image representations of an object when the object is positioned within the examination region;

a fluoroscopic imaging subsystem for generating fluoroscopic image representations of the object, the fluoroscopic imaging subsystem including an x-ray source for transmitting x-rays, a flat panel image receptor for detecting the x-rays and generating signals indicative of the detected x-rays, and a C-arm for supporting the flat panel image receptor in a stored position remote from the examination region and an operating position proximate the examination region; and

the C-arm being secured to a mounting structure that is attached to the frame, the C-arm including an open channel extending longitudinally along a surface of the C-arm, and the mounting structure including a hose guide for directing a cable extending from the frame at least partially into the open channel when the C-arm is orbited in a first direction and for guiding the cable into a service loop from the open channel when the C-arm is orbited in a second direction.

15. A diagnostic imaging apparatus comprising:

a gantry having a bore defining an examination region;

a diagnostic imaging subsystem for generating a first diagnostic image representation of a patient when a patient is positioned within the examination region;

a fluoroscopic imaging subsystem including a C-arm;

mounted to a mounting structure that is secured to the gantry;

includes an open channel extending longitudinally along surface of the C-arm;

supports a flat image receptor that detects x-rays and generates signals indicative of the detected x-rays; and

the mounting structure includes a hose guide for directing a cable extending from the frame at least partially into the open channel when the C-arm is orbited in a first direction and for guiding the cable into a service loop from the open channel when the C-arm is orbited in a second direction.

16. A diagnostic imaging apparatus comprising:

a frame defining an examination region;

a first diagnostic imaging subsystem for generating a first diagnostic image representation of an object when the object is positioned within the examination region; and

a second diagnostic imaging subsystem including a flat panel image receptor that detects x-rays and generates signals indicative of the detected x-rays, the flat panel image receptor being mounted in a housing having a first control panel proximate one end thereof and a second control panel proximate a second end thereof.

17. The diagnostic imaging apparatus of claim 16, further including a C-arm for supporting the flat panel image receptor.

18. A diagnostic imaging apparatus comprising:

a gantry having a bore defining an examination region;

a diagnostic imaging subsystem for generating a first diagnostic image representation of a patient when a patient is positioned within the examination region;

a fluoroscopic imaging subsystem including a ring for supporting a flat panel image receptor that detects x-rays in an operating position concentric with the bore and generates signals indicative of the detected x-rays, the ring including at least one tab which engages the gantry adjacent the bore to facilitate positioning the ring in the operating position.

19. The diagnostic imaging apparatus of claim 18, wherein the fluoroscopy imaging subsystem operates in a radiographic mode to generate radiographic image representations.

20. A diagnostic imaging apparatus comprising:

a frame defining an examination region;

a patient support adapted for movement through the examination region;

a diagnostic imaging subsystem for generating a first diagnostic image representation of an object when the object is positioned within the examination region;

a fluoroscopic imaging subsystem including a C-arm for supporting a flat panel image receptor that detects x-rays and generates signals indicative of the detected x-rays; and

a mounting structure secured to the frame for supporting the C-arm in a stored position remote from the patient support and an operating position proximate the patient support.

21. The diagnostic imaging apparatus of claim 20, wherein:

the flat panel image receptor is offset from the C-arm by a first cantilevered support arm which secures the flat panel image receptor to the C-arm; and

further including an x-ray source which is offset from the C-arm by a second cantilevered support arm which secures the x-ray source to the C-arm.

22. The diagnostic imaging apparatus of claim 21, wherein a centerline extending between the x-ray source and the flat panel image receptor passes through an orbital axis of the C-arm.

23. The diagnostic imaging apparatus of claim 20, wherein the mounting structure includes means for permitting the C-arm to rotate about a geometric center thereof through an arc of at least 180°

.

24. The diagnostic imaging apparatus of claim 20, wherein the flat panel image receptor includes a scintillating layer which coverts x-rays into light, and an amorphous silicon glass substrate supporting a plurality of photodiodes which convert the light generated by the scintillating layer into electrical signals.

25. The diagnostic imaging apparatus of claim 24, wherein the mounting structure includes:

a support arm having a longitudinal track associated therewith;

a first upright support arm movably secured to the support arm for substantial horizontal movement along the track;

a second upright support arm movably secured to the first upright support arm for substantial vertical movement along a common longitudinal axis of the first and second upright support arms, the C-arm being rotatably supported by the second upright support arm.

26. The diagnostic imaging apparatus of claim 20, wherein:

the frame includes a stationary frame member having a bore therethrough which defines the examination region, and a rotating frame member rotatably supported by the stationary frame member for rotation about the examination region; and

the diagnostic imaging subsystem includes an x-ray source for transmitting x-rays through the examination region, an arc of radiation detectors for detecting x-rays which have traversed the examination region and for generating signals indicative of the radiation detected, and an image reconstruction processor for reconstructing an image representation from the signals generated by the arc of radiation detectors.

27. The diagnostic imaging apparatus of claim 20, wherein the diagnostic imaging subsystem is a Computerized Tomographic (CT) scanner.

28. The diagnostic imaging apparatus of claim 20, wherein the diagnostic imaging subsystem is a Magnetic Resonance Imaging (MRI) system.

29. A method of generating fluoroscopic projection image representations with a diagnostic imaging apparatus including 1) a frame having a bore defining an examination region, 2) a first diagnostic imaging subsystem for generating diagnostic image representations of an object when the object is positioned within the examination region, 3) a fluoroscopic imaging subsystem including a flat panel image receptor for detecting x-rays and generating signals indicative of the detected x-rays, and a support member for supporting the flat panel image receptor, and 4) a mounting structure secured directly to the frame that supports the support member in a stored position adjacent the frame and remote from the examination region and an operating position proximate the examination region, the method comprising:

manipulating the mounting structure to reposition the support member from the stored position remote from the examination region to the operating position proximate the examination region;

the flat panel image receptor detecting x-rays generated by an x-ray source and generating signals indicative of the radiation detected when positioned in the operating position; and

reconstructing the fluoroscopic projection image representations from the signals generated by the flat panel image receptor.

30. The method of claim 29, further including:

displaying at least one of the fluoroscopic projection image representations and the diagnostic image representations on a display monitor.

31. The method of claim 29, wherein the support member includes a C-arm, and the moving step includes:

pivoting at least a portion of the mounting structure to move the C-arm from the stored position.

32. The method of claim 31, wherein the mounting structure includes:

a support arm having a longitudinal track associated therewith;

a first upright support arm movably secured to the support arm for substantial horizontal movement along the track;

a second upright support arm movably secured to the first upright support arm for substantial vertical movement along a common longitudinal axis of the first and second upright support arms, the C-arm being rotatably supported by the second upright support arm.

33. The method of claim 31, wherein the flat panel image receptor is offset from the C-arm by a cantilevered arm.

34. The method of claim 29, wherein the flat panel image receptor includes a scintillating layer which coverts x-rays into light, and an amorphous silicon glass substrate supporting a plurality of photodiodes which convert the light generated by the scintillating layer into electrical signals.