Source: http://www.google.com/patents/US7424091?dq=5,778,372
Timestamp: 2017-01-23 19:40:12
Document Index: 481047189

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Patent US7424091 - Combined panoramic, CT (computed tomography) and cephalometric photographing ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsDisclosed herein is a combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus including: a base; a supporting pole; an elevation member; a panoramic and CT photographing part; and a cephalometric photographing part. The panoramic and CT photographing part includes: a rotary...http://www.google.com/patents/US7424091?utm_source=gb-gplus-sharePatent US7424091 - Combined panoramic, CT (computed tomography) and cephalometric photographing apparatusAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7424091 B2Publication typeGrantApplication numberUS 11/298,857Publication dateSep 9, 2008Filing dateDec 9, 2005Priority dateAug 8, 2005Fee statusPaidAlso published asCN1787780A, CN100477964C, EP1721574A1, EP1721574B1, US20070030951, WO2007018333A1Publication number11298857, 298857, US 7424091 B2, US 7424091B2, US-B2-7424091, US7424091 B2, US7424091B2InventorsJae-Yoon Park, Young-Gyun Jin, Tae-Woo KimOriginal AssigneeE-Woo Technology Co., Ltd., Vatech Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (6), Referenced by (30), Classifications (11), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetCombined panoramic, CT (computed tomography) and cephalometric photographing apparatus
US 7424091 B2Abstract
Disclosed herein is a combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus including: a base; a supporting pole; an elevation member; a panoramic and CT photographing part; and a cephalometric photographing part. The panoramic and CT photographing part includes: a rotary arm supporting member; a rotary arm arranging an X-ray source part and an X-ray sensor part in such a way that the X-ray source part and the X-ray sensor part are opposed to each other, the X-ray sensor part having a panoramic sensor and/or a CT sensor; and rotary arm driving means. A distance between the X-ray source part and the X-ray sensor part arranged opposed to each other with respect to the rotary arm is variable. The apparatus can conduct all of panoramic photographing, CT photographing and cephalometric photographing, and provide the optimum enlargement ratio according to whether the panoramic photographing or the CT photographing is conducted.
1. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus comprising:
b) a supporting pole standing on the base;
c) an elevation member mounted on the supporting pole in such a way as to elevate and displace in a vertical direction;
d) a panoramic and CT photographing part mounted on the front surface of the elevation member; and
e) a cephalometric photographing part connected to a side of the elevation member;
wherein the panoramic and CT photographing part includes:
1) a rotary arm supporting member connected to the front upper portion of the elevation member;
2) a rotary arm supported by the rotary arm supporting member and arranging an X-ray source part for generating X-rays and an X-ray sensor part thereon in such a way that the X-ray source part and the X-ray sensor part are opposed to each other, the X-ray sensor part having a panoramic sensor and/or a CT sensor for detecting X-rays which are generated from the X-ray source part and pass through an object;
3) rotary arm driving means interposed between the rotary arm and the rotary arm supporting member for driving the rotary arm; and
4) an X-ray source part driving means mounted at a location where the rotary arm and the X-ray source part are connected with each other,
wherein a distance between the X-ray source part and the X-ray sensor part arranged opposed to each other with respect to the rotary arm is variable,
wherein the cephalometric photographing part includes:
i) a cephalometric sensor part for detecting X-rays which are generated from the X-ray source part and pass through the object;
ii) a horizontal arm for arranging the cephalometric sensor part is mounted at a side thereof; and
iii) a connection member for connecting the horizontal arm to a side of the elevation member,
wherein the X-ray sensor part is fixed on the rotary arm, and
wherein the X-ray source part is horizontally moved in a direction to get near to the X-ray sensor part or in a direction to get away from the X-ray sensor part without regard to the rotary arm,
wherein the X-ray sensor part includes a sensor mounting part to attach and detach a sensor,
wherein one of the panoramic sensor and the CT sensor is mounted on the sensor mounting part,
wherein the X-ray sensor part includes a first sensor mounting part for mounting the panoramic sensor and a second sensor mounting part for mounting the CT sensor.
2. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, wherein the cephalometric photographing part includes a cephalometric sensor mounting part for attaching and detaching a cephalometric sensor thereon and therefrom.
3. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 2, wherein the cephalometric sensor is the same as the panoramic sensor.
4. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 3, wherein the panoramic sensor and the cephalometric sensor are line scan sensors.
5. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 4, wherein the horizontal arm includes a collimator opposed to the cephalometric sensor part at the other side thereof.
6. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, wherein the horizontal arm further includes first head fixing means mounted at a predetermined location thereof.
7. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, wherein the cephalometric sensor is an area sensor.
8. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, wherein the first sensor mounting part is located near to the X-ray source part, but the second sensor mounting part is located away from the X-ray source part.
9. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 8, wherein in case of a CT photographing, the panoramic sensor is separated from the first sensor mounting part so as not to detect X-rays generated from the X-ray source part.
10. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 8, wherein in case of the CT photographing, the first sensor mounting part on which the panoramic sensor is mounted slides in a predetermined direction so as not to detect X-rays generated from the X-ray source part.
11. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, wherein in case of a cephalometric photographing, the X-ray source part is horizontally moved in a direction that the rotary arm supporting member is connected to the elevation member without regard to driving of the rotary arm.
12. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, further comprising X-ray sensor part driving means located at a location where the rotary arm and the X-ray sensor part are connected with each other.
13. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 12, wherein the X-ray sensor part is rotated without regard to the rotary arm, and
wherein the X-ray source part is horizontally moved in a direction to get near to the X-ray sensor part or in a direction to get away from the X-ray sensor part without regard to the rotary arm.
14. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 13, wherein the X-ray sensor part includes the first sensor mounting part for mounting the panoramic sensor and the second sensor mounting part for mounting the CT sensor.
15. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 14, wherein the X-ray sensor part is rotated on a central axis which is a central point between the panoramic sensor and the CT sensor mounted thereon.
16. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 15, wherein in case of the CT photographing, the X-ray sensor part is rotated so that the CT sensor is located nearer to the X-ray source part than the panoramic sensor, and
wherein in case of the panoramic photographing, the X-ray sensor part is rotated so that the panoramic sensor is located nearer to the X-ray source part than the CT sensor.
17. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 13, wherein in case of a cephalometric photographing, the X-ray source part is horizontally moved in a direction that the rotary arm supporting member is connected to the elevation member without regard to driving of the rotary arm.
18. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, further comprising X-ray sensor part driving means mounted at a location where the rotary arm and the X-ray sensor part are connected with each other.
19. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 18, wherein the X-ray sensor part is rotated without regard to the rotary arm, and the X-ray source part is fixed on the rotary arm.
20. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 19, wherein the X-ray sensor part includes the first sensor mounting part for mounting the panoramic sensor and the second sensor mounting part for mounting the CT sensor.
21. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 20, wherein the X-ray sensor part is rotated on an eccentric axis which is located at a predetermined point between a central point between the panoramic sensor and the CT sensor and the CT sensor.
22. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 21, wherein in case of the CT photographing, the X-ray sensor part is rotated so that the CT sensor is located nearer to the X-ray source part than the panoramic sensor, and
23. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, further comprising a rotary arm driving means controller for controlling the rotary arm driving means to move the rotary arm along the fixed locus according to the CT photographing or the panoramic photographing.
24. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, wherein the CT sensor is an area sensor.
25. A combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to claim 1, further comprising:
a chin supporting member connected to the lower portion of the elevation member; and
second head fixing means located between the X-ray source part and the X-ray sensor part, and connected to a predetermined portion of the rotary arm supporting member. Description
U.S. Pat. No. 6,829,326 discloses a combined panoramic and cephalometric photographing apparatus. When cephalometric photographing is conducted after panoramic photographing, the apparatus conducts the cephalometric photographing after properly moving a collimator so that a panoramic sensor does not detect X-rays generated from an X-ray source.
To achieve the above object, the present invention provides a combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus. The combined panoramic, CT and cephalometric photographing apparatus includes: a base; a supporting pole standing on the base; an elevation member mounted on the supporting pole in such a way as to elevate and displace in a vertical direction; a panoramic and CT photographing part mounted on the front surface of the elevation member; and a cephalometric photographing part connected to a side of the elevation member, wherein the panoramic and CT photographing part includes: a rotary arm supporting member connected to the front upper portion of the elevation member; a rotary arm supported by the rotary arm supporting member and arranging the X-ray source part for generating X-rays and the X-ray sensor part thereon in such a way that the X-ray source part and the X-ray sensor part are opposed to each other, the X-ray sensor part having a panoramic sensor and/or a CT sensor for detecting X-rays which are generated from the X-ray source part and pass through an object; and rotary arm driving means interposed between the rotary arm and the rotary arm supporting member for driving the rotary arm, and wherein a distance between the X-ray source part and the X-ray sensor part opposed to each other on the rotary arm is variable.
The combined panoramic, CT and cephalometric photographing apparatus further includes X-ray source part driving means mounted at a location where the rotary arm and the X-ray source part are connected with each other. The X-ray sensor part is fixed on the rotary arm, and the X-ray source part is horizontally moved in a direction to get near to the X-ray sensor part or in a direction to get away from the X-ray sensor part without regard to the rotary arm.
The combined panoramic, CT and cephalometric photographing apparatus further includes X-ray source part driving means mounted at a location where the rotary arm and the X-ray source part are connected with each other, and X-ray sensor part driving means located at a location where the rotary arm and the X-ray sensor part are connected with each other. The X-ray sensor part is rotated without regard to the rotary arm, and the X-ray source part is horizontally moved in a direction to get near to the X-ray sensor part or in a direction to get away from the X-ray sensor part without regard to the rotary arm.
The combined panoramic, CT and cephalometric photographing apparatus further includes X-ray sensor part driving means mounted at a location where the rotary arm and the X-ray sensor part are connected with each other. The X-ray sensor part is rotated without regard to the rotary arm, and the X-ray source part is fixed on the rotary arm.
FIG. 1 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a first preferred embodiment of the present invention.
FIGS. 2 to 5 are front views for showing an operation of an X-ray source part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the first preferred embodiment of the present invention.
FIG. 6 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a second preferred embodiment of the present invention.
FIGS. 7, 8 and 9 are front views for showing an operation of an X-ray source part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the second preferred embodiment of the present invention.
FIG. 10 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a third preferred embodiment of the present invention.
FIG. 13 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a fourth preferred embodiment of the present invention.
FIGS. 14 and 15 are front views for showing an operation of an X-ray source part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the fourth preferred embodiment of the present invention.
EXPLANATION ON ESSENTIAL REFERENCE NUMERALS IN DRAWINGS
100 a,200 a,300 a,400 a: panoramic and CT photographing part
100 b,200 b,300 b,400 b: cephalometric photographing part
FIG. 1 is a perspective view of a combined panoramic, CT (Computed Tomography) and cephalometric photographing apparatus according to a first preferred embodiment of the present invention, and FIGS. 2 to 5 are front views for showing an operation of an X-ray source part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the first preferred embodiment of the present invention.
Referring to FIG. 1, the combined panoramic, computed tomography and cephalometric photographing apparatus 100 includes a base 195, a supporting pole 190, an elevation member 170, a panoramic and CT photographing part 100 a, and a cephalometric photographing part 100 b, and can conduct CT photographing, panoramic photographing, and cephalometric photographing.
The panoramic and CT photographing part 100 a is mounted on the front surface of the elevation member 170, and the cephalometric photographing part 100 b is connected to a side of the elevation member 170.
The panoramic and CT photographing part 100 a will be described in detail. The panoramic and CT photographing part 100 a includes: a rotary arm supporting member 150 connected to the front upper portion of the elevation member 170; a rotary arm 140 supported by the rotary arm supporting member 150 and arranging the X-ray source part 110 for generating X-rays and the X-ray sensor part 120 thereon in such a way that the X-ray source part 110 and the X-ray sensor part 120 are opposed to each other; and rotary arm driving means 160 interposed between the rotary arm 140 and the rotary arm supporting member 150 for driving the rotary arm 140.
A chin supporting member 180 is mounted at the lower portion of the elevation member 170 in nearly orthogonal direction to the elevation member 170. The chin supporting member 180 is formed to position the patient's chin thereon. At this time, the patient's head is located between the X-ray sensor part 120 and the X-ray source part 110 disposed on the rotary arm 140. The chin supporting member 180 can be driven without regard to driving of the elevation member 170.
The X-ray source part 110 can be driven without regard to the driving of the rotary arm 140. That is, X-ray source part driving means 115 is mounted at a part where the rotary arm 140 and the X-ray source part 110 are connected with each other, so that the X-ray source part 110 can be moved. Therefore, the X-ray source part 110 can be horizontally moved in a direction to get near to the X-ray sensor part 120 or in a direction to get away from the X-ray sensor part 120 without regard to the rotary arm 140. The rotary arm 140 includes mechanical components, such as a control motor, therein necessary for driving the X-ray source part 110. Therefore, the CT photographing or the panoramic photographing can be conducted by varying a distance between the object 130 and the X-ray source part 110 and regulating an enlargement ratio. Referring to FIGS. 2 to 4, the operation of the present invention will be described in more detail.
The cephalometric photographing part 100 b will be described in detail. A horizontal arm 15 having a cephalometric sensor part 11, a collimator 18 and first heading fixing means 17 is connected to a side of the elevation member 170 by a connection member 16.
The cephalometric sensor 13 may be a line scan sensor such as a single line scan sensor or a multi line scan sensor, and in this case, the panoramic sensor 121 may be used as the cephalometric sensor 13. At this time, the line scan type sensor needs the collimator 14 for converting X-rays into parallel rays. Therefore, the collimator 14 is mounted on the other side of the horizontal arm 15 in such a way as to be opposed to the cephalometric sensor 13.
For instance, in the case where a distance (a′) between the object 130 and the X-ray source part 110 is 454 mm and a distance (b′) between the X-ray sensor part 120 and the X-ray source part 110 is 590 mm, it is preferable that the enlargement ratio is about 1:1.3. That is, the user horizontally moves the X-ray source part 110 in the direction to get near to the X-ray sensor part 120 using the X-ray source part driving means 115, and then, conducts the panoramic photographing.
In the case where the patient's anterior teeth part is took by the CT photographing, if a distance (a″) between the object 130 and the X-ray source part 110 is 424 mm and a distance (b″) between the X-ray sensor part 120 and the X-ray source part 110 is 678, the enlargement ratio is about 1:1.6.
In the case where the patient's posterior teeth part is took by the CT photographing, if the distance (a″) between the object 130 and the X-ray source part 110 is 424 mm and the distance (b″) between the X-ray sensor part 120 and the X-ray source part 110 is 637 mm, the enlargement ratio is about 1:1.5.
At this time, in the case where the cephalometric sensor 13 is the line scan sensor and the X-ray source part 110, the collimator 14 and the cephalometric sensor part 11 are arranged in a line, the user separates the CT sensor 121 from the sensor mounting part 122 so as not to detect X-rays generated from the X-ray source part 110 and mounts the panoramic sensor, which has been used for the panoramic photographing, on the cephalometric sensor mounting part 12, and then, conducts the cephalometric photographing. The enlargement ratio is nearly 1:1 which means a distance (c) between the object 18 and the X-ray source part 110 to a distance (d) between the cephalometric sensor part 11 and the X-ray source part 110. If it is necessary to regulate the enlargement ratio at the time of the cephalometric photographing, the X-ray source part 110 is moved and the cephalometric photographing is conducted.
Furthermore, in the case where the X-ray source part 110, the collimator 14 and the cephalometric sensor part 11 are not arranged in a line, there is no need to remove the CT sensor 121. In this case, the X-ray source part 110 is horizontally moved in a direction that the rotary arm supporting member 150 is connected to the elevation member 170 (at right angles to an arrow direction in FIG. 5) without regard to driving of the rotary arm 140, and then, the cephalometric photographing is conducted.
As described above, the combined panoramic, computed tomography and cephalometric photographing apparatus according to the first preferred embodiment of the present invention can conduct all of the CT photographing, the panoramic photographing and the cephalometric photographing, and regulate the enlargement ratio by moving the X-ray source part 110 using the X-ray source part driving means 115.
FIG. 6 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a second preferred embodiment of the present invention, and FIGS. 7 and 9 are front views for showing an operation of an X-ray source part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the second preferred embodiment of the present invention.
Referring to FIG. 6, the combined panoramic, computed tomography and cephalometric photographing apparatus 200 includes a base 195, a supporting pole 190, an elevation member 170, a panoramic and CT photographing part 200 a, and a cephalometric photographing part 200 b, and can conduct CT photographing, panoramic photographing, and cephalometric photographing.
The panoramic and CT photographing part 200 a is mounted on the front surface of the elevation member 170, and the cephalometric photographing part 200 b is connected to a side of the elevation member 170.
The panoramic and CT photographing part 200 a will be described in detail. The panoramic and CT photographing part 200 a includes: a rotary arm supporting member 150 connected to the front upper portion of the elevation member 170; a rotary arm 240 supported by the rotary arm supporting member 150 and arranging the X-ray source part 210 for generating X-rays and the X-ray sensor part 220 thereon in such a way that the X-ray source part 210 and the X-ray sensor part 220 are opposed to each other; and rotary arm driving means 160 interposed between the rotary arm 240 and the rotary arm supporting member 150 for driving the rotary arm 240.
The X-ray source part 210 can be driven without regard to the driving of the rotary arm 240. That is, X-ray source part driving means 215 is mounted at a part where the rotary arm 240 and the X-ray source part 210 are connected with each other, so that the X-ray source part 210 can be moved. Therefore, the X-ray source part 210 can be horizontally moved in a direction to get near to the X-ray sensor part 220 or in a direction to get away from the X-ray sensor part 220 without regard to the rotary arm 240.
In a different way, to conduct the CT photographing, the first sensor mounting part 222 on which the panoramic sensor 221 is mounted may slide in a predetermined direction. That is, the first sensor mounting part 222 can slide in the predetermined direction so as not to detect X-rays generated from the X-ray source part 210. The first sensor mounting part 22 may take the slot form for fitting the panoramic sensor thereinto or a form that the panoramic sensor is mounted thereon.
The cephalometric photographing part 200 b will be described in detail. A horizontal arm 15 having a cephalometric sensor part 11, a collimator 18 and first heading fixing means 17 is connected to a side of the elevation member 170 by a connection member 16.
Furthermore, in the case where the X-ray source part 210, the collimator 14 and the cephalometric sensor part 11 are not arranged in a line, there is no need to remove the panoramic sensor 221 and the CT sensor 223. In this case, the X-ray source part 210 is horizontally moved in a direction that the rotary arm supporting member 150 is connected to the elevation member 170 (at right angles to an arrow direction in FIG. 9) without regard to driving of the rotary arm 240, and then, the cephalometric photographing is conducted.
As described above, the combined panoramic, computed tomography and cephalometric photographing apparatus according to the second preferred embodiment of the present invention can conduct all of the CT photographing, the panoramic photographing and the cephalometric photographing, and regulate the enlargement ratio by moving the X-ray source part 210 using the X-ray source part driving means 215.
Excepting the above description, the second preferred embodiment of the present invention has the same operation as the combined panoramic, CT and cephalometric photographing apparatus according to the first preferred embodiment.
FIG. 10 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a third preferred embodiment of the present invention, and FIGS. 11 and 12 are front views for showing operations of an X-ray source part and an X-ray sensor part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the first preferred embodiment of the present invention.
Referring to FIG. 10, the combined panoramic, computed tomography and cephalometric photographing apparatus 300 includes a base 195, a supporting pole 190, an elevation member 170, a panoramic and CT photographing part 300 a, and a cephalometric photographing part 300 b, and can conduct CT photographing, panoramic photographing, and cephalometric photographing.
The panoramic and CT photographing part 300 a is mounted on the front surface of the elevation member 170, and the cephalometric photographing part 300 b is connected to a side of the elevation member 170.
The panoramic and CT photographing part 300 a will be described in detail. The panoramic and CT photographing part 300 a includes: a rotary arm supporting member 150 connected to the front upper portion of the elevation member 170; a rotary arm 340 supported by the rotary arm supporting member 150 and arranging the X-ray source part 310 for generating X-rays and the X-ray sensor part 320 thereon in such a way that the X-ray source part 310 and the X-ray sensor part 320 are opposed to each other; and rotary arm driving means 160 interposed between the rotary arm 340 and the rotary arm supporting member 150 for driving the rotary arm 340.
The X-ray source part 310 can be driven without regard to the driving of the rotary arm 340. That is, X-ray source part driving means 315 is mounted at a location where the rotary arm 340 and the X-ray source part 310 are connected with each other, so that the X-ray source part 310 can be moved. Therefore, the X-ray source part 310 can be horizontally moved in a direction to get near to the X-ray sensor part 320 or in a direction to get away from the X-ray sensor part 320 without regard to the rotary arm 340.
The third preferred embodiment of the present invention includes the X-ray sensor part 320 having all of the panoramic sensor 321 and the CT sensor 323, and can drive both of the X-ray source part 310 and the X-ray sensor part 320.
The cephalometric photographing part 300 b will be described in detail. A horizontal arm 15 having a cephalometric sensor part 11, a collimator 18 and first heading fixing means 17 is connected to a side of the elevation member 170 by a connection member 16.
Hereinafter, referring to FIGS. 11 to 12, a process to conduct the CT photographing, the panoramic photographing and the cephalometric photographing by varying the distance between the X-ray source part 310 and the X-ray sensor part 320 will be described.
The X-ray sensor part driving means 325 can rotate the X-ray sensor part 320 on a central axis which is a central point located between the panoramic sensor 321 and the CT sensor 323. When the X-ray sensor part 320 is rotated on the central axis which is the central point located between the panoramic sensor 321 and the CT sensor 323, a distance (b, b′) between the panoramic sensor 321 or the CT sensor 323 and the X-ray source part 310 is the same. However, when the X-ray source part 310 is horizontally moved, the user can conduct the photographing while regulating the enlargement ratio differently since the distance can be regulated.
FIG. 13 is a perspective view of a combined panoramic, computed tomography and cephalometric photographing apparatus according to a fourth preferred embodiment of the present invention, and FIGS. 14 and 15 are front views for showing an operation of an X-ray source part of the combined panoramic, computed tomography and cephalometric photographing apparatus according to the fourth preferred embodiment of the present invention.
Referring to FIG. 13, the combined panoramic, computed tomography and cephalometric photographing apparatus 400 includes a base 195, a supporting pole 190, an elevation member 170, a panoramic and CT photographing part 400 a, and a cephalometric photographing part 400 b, and can conduct CT photographing, panoramic photographing, and cephalometric photographing.
The panoramic and CT photographing part 400 a is mounted on the front surface of the elevation member 170, and the cephalometric photographing part 400 b is connected to a side of the elevation member 170.
The panoramic and CT photographing part 400 a will be described in detail. The panoramic and CT photographing part 400 a includes: a rotary arm supporting member 150 connected to the front upper portion of the elevation member 170; a rotary arm 440 supported by the rotary arm supporting member 150 and arranging the X-ray source part 410 for generating X-rays and the X-ray sensor part 420 thereon in such a way that the X-ray source part 410 and the X-ray sensor part 420 are opposed to each other; and rotary arm driving means 160 interposed between the rotary arm 440 and the rotary arm supporting member 150 for driving the rotary arm 440.
The X-ray sensor part 420 is not fixed on the rotary arm 440, and so, can be driven without regard to the driving of the rotary arm 440. That is, X-ray source part driving means 415 is mounted at a location where the rotary arm 440 and the X-ray sensor part 420 are connected with each other, so that the X-ray sensor part 420 can be moved.
The fourth preferred embodiment of the present invention suggests the apparatus including the X-ray sensor part 420 having all of the panoramic sensor 421 and the CT sensor 423, wherein the X-ray source part 410 is fixed on the rotary arm 440 but the X-ray sensor part 420 is movable.
The cephalometric photographing part 400 b will be described in detail. A horizontal arm 15 having a cephalometric sensor part 11, a collimator 18 and first heading fixing means 17 is connected to a side of the elevation member 170 by a connection member 16.
The X-ray source part driving means 415 rotates the X-ray sensor part 420 on an eccentric axis which is located at a predetermined point between the central point between the panoramic sensor 421 and the CT sensor 423 and the CT sensor 423. As described above, in case of the panoramic photographing, it is preferable that the enlargement ratio is 1:1.3, but in case of the CT photographing, it is preferable that the enlargement ratio is 1:1.5 or 1:1.6. Therefore, it is preferable that the X-ray sensor part 420 is rotated on the eccentric axis so that the distance (b) between the panoramic sensor 421 and the X-ray sensor part 410 which are opposed to each other is shorter than the distance (b′) between the CT sensor 423 and the X-ray source part 410 which are opposed to each other.
Referring to FIG. 15, to conduct the CT photographing after the panoramic photographing, the X-ray sensor part 420 is rotated on the eccentric shaft which is located at the predetermined point between the central point between the panoramic sensor 421 and the CT sensor 423 and the CT sensor 423. At this time, the distance (b′) between the CT sensor 423 and the X-ray source part 410 gets longer than the distance (b) between the panoramic sensor 421 and the X-ray sensor part 410. The distance (a, a′) between the object 130 and the X-ray source part 410 is the same.
Excepting the above description, the fourth preferred embodiment of the present invention has the same operation as the combined panoramic, CT and cephalometric photographing apparatus according to the first preferred embodiment.
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