IP Library Granted Patent US 8,447,078
Granted Patent B2
US 8,447,078 · App. 11/800,027 · Granted May 21, 2013

X-ray diagnostic device

Inventor: Michael Maschke (Lonnerstadt, DE)
Assignee: Siemens Aktiengesellschaft
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Quick Facts
Patent No.
US 8,447,078
App. No.
11/800,027
Granted
May 21, 2013
Kind
B2
Abstract

There is described an X-ray diagnostic device for performing cephalometric, dental or orthopedic examinations on a patient who is seated or standing. The X-ray diagnostic device comprises an X-ray emitter and an image detector embodied as a flat-panel detector that are arranged situated opposite each other on an orbitally moveable mount. The X-ray diagnostic device further comprises means for adjusting the height of the X-ray emitter and the image detector, a digital image system for recording a projection image using rotation angiography, a device for image processing for reconstructing the projection image into a 3D volume image; and a device for correcting physical effects or artifacts for representing soft tissue in the projection image and in the 3D volume image reconstructed therefrom.

Claims (28)

1. An X-ray diagnostic device for an examination on a patient seated or standing, comprising:

a X-ray emitter arranged on a mounting device moveable on a circular path;

a flat-panel image detector situated opposite to the X-ray emitter and arranged on the mounting device;

a adjustment device to adjust the height of the X-ray emitter and of the image detector;

a digital image system to record a projection image based upon rotation angiography;

an image processing device to reconstruct the projection image into a 3D volume image; and

a correction device to correct physical effects or artifacts by performing truncation correction, scatter correction, blooming correction, ring artifact correction, and low-frequency drop, for representing soft tissue in the projection image and the 3D volume image,

wherein the correction device effects a correction of a movement of the patient, wherein the movement of the patient is registered by a sensor and transmitted wirelessly to a receiver, and

wherein the correction device effects a calibration of the X-ray diagnostic device comprising:

a geometry calibration to determine X-ray optics,

a distortion calibration for an X-ray image amplifier,

an intensity calibration for each gray scale value in the projection image by assigning an intensity I and a line integral p=ln(I/I 0 ), wherein the intensity I 0 is an intensity without the patient has been determined, and

a gain calibration for the flat-panel image detector to suppress a fixed pattern noise in the 3D volume image.

2. The X-ray diagnostic device as claimed in claim 1 , wherein the examination is selected out of the group consisting of: a cephalometric examination, a dental examination, and an orthopedic examination.

3. The X-ray diagnostic device as claimed in claim 1 , wherein the adjustment device has a vertically moveable support arm attached to a stand, wherein the stand is selected from the group consisting of: a floor stand and a ceiling mount.

4. The X-ray diagnostic device as claimed in claim 1 , characterized in that the adjustment device has a robot arm with at least one articulated joint.

5. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device has a separate correction processor.

6. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device effects a truncation correction.

7. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device effects a scatter correction.

8. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device effects a blooming correction.

9. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device effects a correction of a low-frequency drop.

10. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device effects a ring artifact correction.

11. The X-ray diagnostic device as claimed in claim 1 , wherein the correction device effects a correction of beam hardening.

12. The X-ray diagnostic device as claimed in claims 1 , wherein the mounting device includes has a C-arm, wherein the X-ray emitter and the flat-panel detector are located on ends of the C-arm.

13. The X-ray diagnostic device as claimed in claim 1 , wherein the flat-panel detector is made based upon a technique selected from the group consisting of: amorphous silicon technique, selenium technique, organic photodiode technique, and phototransistor technique.

14. The X-ray diagnostic device as claimed in claim 1 , further comprises a device for the patient selected from the group consisting of: an ergometer, and a traveling belt.

15. The X-ray diagnostic device as claimed in claim 1 , wherein a 3D display displays a 3D volume image.

16. The X-ray diagnostic device as claimed in claim 1 , wherein the detector is the X-ray image amplifier.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2016
From: SIEMENS AKTIENGESELLSCHAFT
To: SIEMENS HEALTHCARE GMBH
Reel/Frame 039271/0561 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 3, 2007
From: MASCHKE, MICHAEL
To: SIEMENS AKTIENGESELLSCHAFT
Reel/Frame 019330/0939 →
Continuity (1)
Related Publication 20070269001A1 · Nov 22, 2007