Apparatus and method for mechanically providing power to a generator on a continuous rotatable rotor of an X-ray scanner

Patent metadata

Field	Value
Publication number	US-9820708-B2
Application number	US-201514672391-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Mar 30, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A system including an x-ray scanner gantry having: a housing; a gantry gear; a rotor; a generator mounted on the rotor; and first and second generator gears connected to or engaged with one or more axles of the generator. The second generator gear is engaged with the gantry gear. A motor rotates the intermediate gear via a motor gear. A second actuator actuates the motor gear to engage the motor with the rotor. A control module operates in first and second modes and: while in the first mode, engages the intermediate gear to the first generator gear via the first actuator to rotate, via the motor gear, the intermediate gear and as a result the first generator gear; and while in the second mode, engage the motor to the rotor via the second actuator to rotate, via the motor gear, the rotor and as a result the second generator gear.

First claim

What is claimed is:

1. A system comprising:
an x-ray scanner gantry comprising
a housing,
a gantry gear formed as part of or connected to the housing,
a rotor,
a generator mounted on the rotor, and
a first generator gear and a second generator gear connected to or configured to engage with one or more axles of the generator, wherein the second generator gear is engaged with the gantry gear;

an intermediate gear;
a first actuator connected to the intermediate gear;
a motor gear coupled to and configured to rotate the intermediate gear;
a motor configured to rotate the motor gear;
a second actuator configured to actuate the motor gear to engage the motor with the rotor; and
a control module configured to operate in a first mode and a second mode, wherein the control module is configured to
while in the first mode, engage the intermediate gear to the first generator gear via the first actuator to rotate, via the motor gear, the intermediate gear and as a result the first generator gear to generate power, and
while in the second mode, engage the motor to the rotor via the second actuator to rotate, via the motor gear, the rotor and as a result the second generator gear to generate power.

2. The system of claim 1 , wherein:
the generator comprises one or more clutches configured to engage the first generator gear and the second generator gear to one or more axles of the generator;
while in the first mode, the one or more clutches engage the first generator gear to the one or more axles; and
while in the second mode, the one or more clutches engage the second generator gear to the one or more axles.

3. The system of claim 1 , wherein the control module is configured to:
operate in a third mode; and
while in the third mode, the control module is configured to (i) disengage the motor from the rotor, and (ii) disengage the intermediate gear from the first generator gear.

4. The system of claim 1 , wherein the control module is configured to:
prior to the first mode, disengage the motor from the rotor such that (i) the motor is not rotating the rotor during the first mode, and (ii) the second generator gear is not rotating; and
prior to the second mode, disengage the intermediate gear from the first generator gear such that the first generator gear is not being rotated by the motor gear during the second mode.

5. The system of claim 1 , wherein the x-ray scanner gantry comprises a rotor gear mounted on and configured to rotate the rotor, wherein:
the second actuator is configured to actuate the motor gear towards the rotor gear to engage the motor gear with the rotor gear; and
the control module is configured to, while in the second mode, engage the motor gear to the rotor gear via the second actuator to rotate, via the motor gear, (i) the rotor, and (ii) the second generator gear.

6. The system of claim 1 , wherein the gantry gear is fixed to the housing and does not rotate.

7. The system of claim 1 , further comprising a coupling member connecting the intermediate gear to the motor gear.

8. The system of claim 1 , further comprising a plurality of devices mounted on the rotor,
wherein the generator is configured to power the plurality of devices while the control module is in the first mode and the second mode.

9. The system of claim 8 , wherein the plurality of devices comprise an x-ray source and an x-ray detector.

10. The system of claim 1 , further comprising:
a sensor mounted on the rotor and configured to generate a signal; and
a rotor module connected to the rotor and configured to, based on the signal, generate an information signal and wirelessly transmit the information signal to the control module,
wherein the control module is configured to engage the motor to the rotor based on the information signal.

11. The system of claim 1 , further comprising a sensor configured to generate a signal, wherein:
the signal is indicative of a speed of the rotor; and
the control module is configured to (i) compare the signal to a predetermined speed, and (ii) if the speed is greater than the predetermined speed, signal the second actuator to translate the motor gear to engage the motor to the rotor.

12. The system of claim 1 , further comprising:
an x-ray source connected to the rotor and configured to generate x-rays;
an x-ray detector connected to the rotor and configured to detect the x-rays and generate a signal; and
a processor configured to
while the control module is in the first mode, generate a 2D image based on the signal, and
while the control module is in the second mode, generate a 3D image based on the signal.

13. A system comprising:
an x-ray scanner gantry comprising
a housing,
a gantry gear formed as part of or connected to the housing,
a rotor,
a generator connected to the rotor, and
a first generator gear connected to an axle of the generator, wherein the first generator gear is engaged with the gantry gear;

a motor gear;
a motor configured to rotate the motor gear;
a first actuator configured to actuate the motor gear to engage the motor with the rotor; and
a control module configured to operate in a first mode and a second mode, wherein the control module is configured to
while in the first mode, translate the motor gear to disengage the motor from the rotor and turn OFF the generator, and
while in the second mode, (i) translate the motor gear via the first actuator to engage the motor to the rotor, and (ii) rotate, via the motor gear, the rotor and as a result the first generator gear to generate power.

14. The system of claim 13 , wherein the gantry gear is formed as part of the housing.

15. The system of claim 13 , wherein the gantry gear is attached to the housing.

16. The system of claim 13 , wherein:
during the second mode, the generator is moved in a circular motion within the housing; and
the circular motion of the generator along with the engagement between the first generator gear and the gantry gear causes the first generator gear to spin to generate power.

17. The system of claim 13 , further comprising:
a second generator gear connected to and/or configured to engage with the axle of the generator;
an intermediate gear connected to the motor gear via a coupling member; and
a second actuator configured to translate the intermediate gear relative to the second generator gear,
wherein the control module is configured to, while in a third mode, (i) disengage the rotor from the motor, and (ii) via the second actuator, engage the intermediate gear to the second generator gear to rotate the axle of the generator and generate power.

18. A system comprising:
an x-ray scanner gantry comprising
a rotor,
a generator connected to the rotor, and
a generator gear connected to an axle of the generator;

an intermediate gear;
a first actuator connected to the intermediate gear;
a motor gear coupled to and configured to rotate the intermediate gear;
a motor configured to rotate the motor gear;
a second actuator configured to actuate the motor gear to engage the motor with the rotor; and
a control module configured to operate in a first mode and a second mode, wherein the control module is configured to
while in the first mode, engage the intermediate gear to the generator gear via the first actuator to rotate, via the motor gear, the intermediate gear and as a result the generator gear to generate power, and
while in the second mode, disengage the intermediate gear from the generator gear to turn OFF the generator.

19.

Assignees

• Medtronic Navigation Inc

Inventors

• Risher-Kelly Clifford M

Classifications

• A61B6/4435

  the source unit and the detector unit being coupled by a rigid structure · CPC title

• H02K7/116

  with gears · CPC title

• A61B6/035

  Mechanical aspects of CT · CPC title

• H02K7/108

  with friction clutches · CPC title

• A61B6/4476 Primary

  related to motor-assisted motion of the source unit · CPC title