201041560 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種執行口腔内牙齒的χ射線攝影時所使 用之X射線攝影辅助器具。 【先前技術】 使用X射線裝置的牙齒攝影，—般係使用將χ射線膠片 保持於口腔内的辅助1§具。例如，牙科用的口腔内X射線 G攝關助n具，係具備有在攝料其—端插人於口腔内的平 板狀固持基板。在插人細㈣的端部，固定設有安裝χ 射線膠片的膠片支樓板。另—方面，在固持基板中與膠片支 -撐板相反側之端部，設有χ射線管導引環。χ射線管導引 .環係使用於χ射線照射口的定位，其被配置為與膠片支撐 板相對向。 ㈣基板鋪由受驗者咬住固持基板而騎，此時，固持 基板係與攝影對象牙齒的齒軸保持略垂直之配置。在此狀離 下，若使X射線照射口合致於χ射線導引環，則所照射^ χ射線之t,(光束中心)將略垂直於膠片受光面與攝影對 象牙齒之齒軸之平八；, 十刀面。猎此，可在X射線膠片記錄略原 寸大小牙齒之χ射線影像。 ’、 [專利文獻1]日本專利特開2齡號公報 【發明内容】 (發明所欲解決之問題） 099112480 201041560 因而經常無 難以獲得原 但是，因為受驗者之口腔内形狀有各弋各 法依照平分面攝影法來施行攝影，在此情況下 寸大小及/或無失真之牙齒影像。 本發明之目的在於提供一種可在 在不又口腔内形狀影響下 進行牙齒的X射線投影像攝影，㈣可取得χ射線投㈣ 像之倍率相訊的口腔内χ射線攝影辅助器具及口腔: X射線攝影系統。 (解決問題之手段）201041560 VI. Description of the Invention: [Technical Field] The present invention relates to an X-ray assisting implement for use in performing radiographic photography of teeth in the oral cavity. [Prior Art] Dental photography using an X-ray device generally uses an auxiliary 1 § which holds the x-ray film in the oral cavity. For example, a dental intraoral X-ray G-assisted n-piece has a flat-plate-shaped holding substrate in which the end of the photograph is inserted into the oral cavity. At the end of the inserted fine (4), a film support floor panel on which the ray film is mounted is fixed. On the other hand, a ray tube guide ring is provided at an end portion of the holding substrate opposite to the film supporting plate. X-ray tube guide. The ring system is used for the positioning of the x-ray irradiation port, which is configured to face the film support plate. (4) The substrate is laid by the subject biting the holding substrate, and at this time, the holding substrate is disposed to be slightly perpendicular to the pinion of the photographic subject tooth. In this case, if the X-ray irradiation port is caused to the X-ray guiding ring, the t-ray (the center of the beam) of the irradiated ray will be slightly perpendicular to the flattening of the tooth-receiving surface of the film and the tooth axis of the photographic subject; , ten knife face. Hunt this, you can record the ray image of the teeth of the original size in X-ray film. [Patent Document 1] Japanese Patent Laid-Open No. 2 No. [Invention] (Problems to be Solved by the Invention) 099112480 201041560 Therefore, it is often difficult to obtain the original, but the shape of the oral cavity of the subject has various methods. Photography is performed according to the grading method, in which case the size and/or distortion of the tooth image. It is an object of the present invention to provide an X-ray projection imaging capable of performing teeth under the influence of the shape of the oral cavity, and (4) an oral radiographic aid and an oral cavity capable of obtaining a magnification of the X-ray projection (4) image: X Radiographic system. (the means to solve the problem)
本發明之口腔内X射線攝影辅助器具，其特徵在於，其 具備有：固持基板’插人於口腔内；攝像媒體保持部，保持 進行X射線投影像之攝像的χ射線像攝像媒體；及檢測部， 檢測作為攝像媒體保持部與攝影對象牙齒之齒 離之第1距離。 口腔内X射線攝影獅H具例如具備有料於固持基板 而用於保持攝像媒體保持部的抽出部，而抽出部可從固持基《j 板被抽出，並可配合受驗者之口腔内形狀而調整攝像媒體保 持部之位置。此時，第1距離係根據檢測部所檢測到抽出部 從固持基板之突出量而求得。又，口腔内x射線攝影辅助 器具係如具備有對抽出部賦予朝向固持基板勢能之靖予勢 能構件，其可配合口腔内之形狀而自動調整攝像媒體保持部 之位置。 再者’檢測部亦可藉由檢測由牙齒所咬合的固持基板上之 099112480 4 201041560 位置，而可求取第1距離、與x射線發光位置和攝影對象 牙齒之齒軸之間的距離之第2距離。由此，可使檢測用於距 離之構成更加簡略化。 再者，固持基板亦可具備有用於固定X射線裝置之固定 部，當在固定部固定X射線裝置時，X射線裝置之X射線 發光位置相對固持基板而被定位在既定位置，同時X射線 之光束中心沿固持基板而朝向攝像媒體保持部被配置。由 〇 此，可更簡單地求得第1、第2距離。 攝像媒體保持部例如被配置為X射線之光束中心與保持 於攝像媒體保持部之X射線像攝像媒體相正交。由此，可 - 獲得實質無失真之X射線投影像，亦可簡單進行影像轉換。 . 再者，本發明之口腔内X射線攝影系統，係包括有上述 口腔内X射線攝影辅助器具之口腔内X射線攝影系統；其 特徵在於，其具備有運算部，該運算部係使用第1距離、與 ❹ X射線發光位置和攝影對象牙齒之齒軸之間的距離之第2 距離，而計算出攝影對象牙齒與投影在X射線像攝像媒體 之攝影對象牙齒之X射線投影像的比率。 X射線攝像媒體為例如X射線攝像元件，運算部根據上 述比率進行由X射線攝像元件所攝影到影像之線性轉換。 又，口腔内X射線攝影系統亦可更進一步具備有顯示線性 轉換後影像之顯示器。 再者，本發明另一觀點之口腔内X射線攝影系統，其具 099112480 5 201041560 備有：X射線裝置；固持基板，在使用X射線裝置進行攝 影時，其經攝影對象牙齒或其他牙齒咬住而保持；攝像媒體 安裝部，在進行攝影時，其被設置於固持基板中插入於口腔 内部分之端部，並使從X射線裝置所照射的X射線之中心 轴與受光面相正交而安裝X射線攝像媒體；及運算部，根 據X射線攝像媒體與攝影對象牙齒之第1距離、與攝影對 象牙齒和X射線裝置之X射線發光位置之第2距離，而計 算出攝影對象牙齒、與X射線攝像媒體中攝影對象牙齒之 投影像的大小比率。 因為從X射線裝置所照射的X射線係從X射線發光位置 擴散，因此隨X射線攝像媒體越離攝影對象牙齒，則X射 線攝像媒體中之投影像則越大，但在得知實際攝影對象牙齒 大小與攝影對象牙齒之投影像大小的差異（比率）後，即可觀 察X射線影像。 X射線攝像媒體最好為X射線攝像元件，運算部為對由X 射線攝像元件所獲得之影像信號施以影像處理之影像處理 部，影像處理部根據比率，調整經影像處理所獲得影像之大 /Jn 〇 藉由進行該大小之調整，而可獲得接近實際大小的攝影對 象牙齒之X射線影像。 再者，其最好更進一步具備有：抽出部，設置於固持基板， 並安裝有攝像媒體安裝部，其從固持基板之突出量可產生變 099112480 6 201041560 動；及突出量檢測部，檢測抽出部之突出量；而運算部根據 突出量計算出第1距離。 根據攝像媒體安裝部（或X射線攝像媒體)與受驗者之顎 骨等之位置關係，可變化抽出部之突出量，以調整X射線 攝像媒體之位置。突出量可由霍爾感測器等之檢測構件（突 出量檢測部）進行檢測。根據檢測結果而決定第1距離。 再者，最好於固持基板安裝X射線裝置以使X射線發光 〇 位置位於既定位置。 由此，可簡單使X射線發光位置合致於既定位置，可決 定第2距離。又，亦可容易配置經考慮攝影對象牙齒之齒軸 - 或X射線攝像媒體之受光面、與X射線之中心軸之位置關 . 係後的X射線裝置。 再者，其最好更進一步具備有用於檢測固持基板上攝影對 象牙齒位置之位置檢測部，運算部根據位置檢測部之檢測結 〇 果，計算出第1距離及第2距離。 根據攝像媒體安裝部（或X射線攝像媒體)與受驗者之顎 骨等之位置關係，可調整攝影對象牙齒之位置。攝影對象牙 齒在固持基板上之位置可由壓力感測器等之檢測構件(位置 檢測部）進行檢測。根據檢測結果而決定第1距離與第2距 離。 (發明效果） 如上述，根據本發明，其可提供一種可在不受口腔内形狀 099112480 7 201041560 影響下進行牙齒之X射線投影像之攝影且同時可取得X射 線投影影像之倍率相關資訊的口腔内X射線攝影輔助器具 及口腔内X射線攝影系統。 【實施方式】 以下，針對本發明之實施形態參照所附圖式進行說明。 圖1係第1實施形態口腔内X射線攝影系統1之示意側 視圖。口腔内X射線攝影系統1係使用於例如牙科中牙齒 之X射線攝影。口腔内X射線攝影系統1係包括有例如X r 射線攝影輔助器具2、X射線裝置50及電腦（運算部）60。又， X射線攝影輔助器具2係具備有例如固持基板10、抽出部 12、賦予勢能構件14、突出量檢測部16、攝像元件安裝部（攝 像媒體保持部）20及X射線攝像元件(X射線攝像媒體)22。 另外，本實施形態中，X射線攝像元件22為例如CCD，X 射線裝置50為例如小型且攜帶容易的攜帶型X射線裝置。 固持基板10係形成為平板狀(例如U字形平板），當使用 1 X射線裝置50進行攝影時，則將其一端插入於口腔内。在 插入於口腔内的端部，設有抽出部12。賦予勢能構件14係 朝靠近固持基板10的方向對抽出部12賦予勢能，在無負荷 狀態下，抽出部12從該端部之突出量呈現最小。另外，本 實施形態中，抽出部12係可朝與固持基板10面平行之方向 抽出。又，賦予勢能構件14可使用例如彈簧或橡膠等彈性 099112480 8 201041560 突出量檢測部16係檢測抽出部12從該端部的突出量，並 將檢測結果輸出至電腦60。突出量檢測部16係例如由設置 在固持基板10的霍爾感測器、與設置在抽出部12的磁石所 構成，來自霍爾感測器的輸出信號將被傳送至電腦60。來 自霍爾感測器的輸出值係根據抽出部12從固持基板10之突 出量而變動。另外，電腦60與X射線攝影輔助器具2之間 之通信，例如可透過可裝卸自如之信號線進行，但亦可利用 Ο 無線或光通信。又，電腦60可利用通用電腦，但亦可將專 用處理器等安裝於X射線攝影輔助器具2。The intraoral X-ray assisting device according to the present invention includes: a holding substrate 'inserted into the oral cavity; and an imaging medium holding unit that holds the X-ray imaging image for imaging the X-ray projection image; and detecting The first distance between the imaging medium holding unit and the tooth of the imaging subject is detected. The intraoral X-ray lion H has, for example, an extraction portion for holding the imaging medium holding portion, and the extraction portion can be extracted from the holding base "j plate" and can match the shape of the oral cavity of the subject. Adjust the position of the camera media holder. At this time, the first distance is obtained based on the amount of protrusion of the extraction portion from the holding substrate detected by the detecting unit. Further, the intraoral x-ray assisting device is provided with a viscous potential member for imparting potential energy to the holding substrate to the drawing portion, and the position of the imaging medium holding portion can be automatically adjusted in accordance with the shape of the oral cavity. Furthermore, the detecting portion can also determine the distance between the first distance, the x-ray emitting position, and the tooth axis of the photographic subject tooth by detecting the position of 099112480 4 201041560 on the holding substrate that is engaged by the tooth. 2 distances. Thereby, the configuration for detecting the distance can be made more simplified. Furthermore, the holding substrate may be provided with a fixing portion for fixing the X-ray device. When the X-ray device is fixed to the fixing portion, the X-ray emitting position of the X-ray device is positioned at a predetermined position relative to the holding substrate, and the X-ray is simultaneously The center of the light beam is disposed toward the image pickup medium holding portion along the holding substrate. Therefore, the first and second distances can be obtained more easily. The imaging medium holding unit is disposed, for example, such that the center of the X-ray beam is orthogonal to the X-ray image capturing medium held by the imaging medium holding unit. Thereby, it is possible to obtain an X-ray projection image which is substantially free from distortion, and to perform image conversion simply. Furthermore, the intraoral X-ray imaging system of the present invention includes an intraoral X-ray imaging system including the above-described intraoral X-ray imaging aid, and is characterized in that it includes a calculation unit, and the calculation unit uses the first The distance between the distance and the X-ray illumination position and the tooth axis of the photographic subject tooth is calculated as the ratio of the X-ray projection image of the photographic subject tooth to the photographic subject tooth projected on the X-ray image capturing medium. The X-ray imaging medium is, for example, an X-ray imaging element, and the arithmetic unit performs linear conversion of the image captured by the X-ray imaging element in accordance with the above ratio. Further, the intraoral X-ray imaging system may further include a display for displaying a linearly converted image. Furthermore, the intraoral X-ray imaging system according to another aspect of the present invention has 099112480 5 201041560 and is provided with: an X-ray device; and a holding substrate which is bitten by a tooth or other tooth of the photographic subject when the X-ray device is used for photography. And the image pickup medium mounting portion is inserted into the end portion of the inner portion of the oral cavity in the holding substrate, and is mounted to be orthogonal to the central axis of the X-ray irradiated by the X-ray device and the light receiving surface. The X-ray imaging medium and the calculation unit calculate the imaging target tooth and the X based on the first distance between the X-ray imaging medium and the imaging target tooth and the second distance from the X-ray illumination position of the imaging target tooth and the X-ray device. The ratio of the size of the projected image of the photographic subject's teeth in the radiographic imaging medium. Since the X-ray system irradiated from the X-ray device is diffused from the X-ray light-emitting position, the projection image in the X-ray imaging medium is larger as the X-ray imaging medium is away from the imaging target tooth, but the actual imaging object is known. After the difference (ratio) between the size of the tooth and the size of the projected image of the tooth of the subject, the X-ray image can be observed. Preferably, the X-ray imaging medium is an X-ray imaging element, and the calculation unit is an image processing unit that performs image processing on the image signal obtained by the X-ray imaging element, and the image processing unit adjusts the image obtained by the image processing according to the ratio. /Jn 〇 By adjusting the size, an X-ray image of the subject's teeth close to the actual size can be obtained. Furthermore, it is preferable to further include: an extraction portion provided on the holding substrate, and an image pickup medium mounting portion mounted thereon, wherein the amount of protrusion from the holding substrate can be changed to 099112480 6 201041560; and the protruding amount detecting portion detects the extraction The amount of protrusion of the part; and the calculation unit calculates the first distance based on the amount of protrusion. The position of the X-ray imaging medium can be adjusted by changing the amount of protrusion of the extraction unit based on the positional relationship between the imaging medium mounting unit (or X-ray imaging medium) and the subject's tibia. The amount of protrusion can be detected by a detecting member (protrusion amount detecting unit) such as a Hall sensor. The first distance is determined based on the detection result. Further, it is preferable to mount the X-ray device on the holding substrate so that the X-ray illuminating 位置 position is at a predetermined position. Thereby, the X-ray light-emitting position can be easily brought to a predetermined position, and the second distance can be determined. Further, it is also possible to easily arrange the X-ray device after considering the pinion of the tooth to be photographed - or the light receiving surface of the X-ray image medium and the position of the central axis of the X-ray. Furthermore, it is preferable that the position detecting unit for detecting the position of the photographing target tooth on the holding substrate is further provided, and the calculating unit calculates the first distance and the second distance based on the detection result of the position detecting unit. The position of the subject's teeth can be adjusted according to the positional relationship between the imaging medium mounting portion (or X-ray imaging medium) and the subject's tibia. The position of the photographic subject tooth on the holding substrate can be detected by a detecting member (position detecting portion) such as a pressure sensor. The first distance and the second distance are determined based on the detection result. (Effect of the Invention) As described above, according to the present invention, it is possible to provide an oral cavity which can perform imaging of X-ray projection images of teeth without being affected by the shape of the oral cavity 099112480 7 201041560 while obtaining magnification-related information of X-ray projection images. Internal X-ray assistive device and intraoral X-ray system. [Embodiment] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Fig. 1 is a schematic side view of the intraoral X-ray imaging system 1 of the first embodiment. The intraoral X-ray system 1 is used for, for example, X-ray photography of teeth in dentistry. The intraoral X-ray imaging system 1 includes, for example, an X-ray imaging assisting device 2, an X-ray device 50, and a computer (computing unit) 60. In addition, the X-ray imaging aid 2 includes, for example, a holding substrate 10, an extraction unit 12, a potential energy member 14, a protrusion amount detecting unit 16, an imaging element mounting unit (imaging medium holding unit) 20, and an X-ray imaging element (X-ray). Camera media) 22. Further, in the present embodiment, the X-ray imaging element 22 is, for example, a CCD, and the X-ray device 50 is, for example, a portable X-ray device that is small and easy to carry. The holding substrate 10 is formed in a flat shape (for example, a U-shaped flat plate), and when photographing is performed using the X-ray device 50, one end thereof is inserted into the oral cavity. An extraction portion 12 is provided at an end inserted into the oral cavity. The potential energy member 14 is given a potential energy to the extraction portion 12 in a direction close to the holding substrate 10. In the no-load state, the amount of protrusion of the extraction portion 12 from the end portion is minimized. Further, in the present embodiment, the extracting portion 12 can be taken out in a direction parallel to the surface of the holding substrate 10. Further, the potential member 14 can be elasticized by, for example, spring or rubber. 099112480 8 201041560 The protrusion amount detecting unit 16 detects the amount of protrusion of the extraction unit 12 from the end portion, and outputs the detection result to the computer 60. The protrusion amount detecting portion 16 is constituted by, for example, a Hall sensor provided on the holding substrate 10 and a magnet provided in the extracting portion 12, and an output signal from the Hall sensor is transmitted to the computer 60. The output value from the Hall sensor varies depending on the amount of protrusion of the extraction unit 12 from the holding substrate 10. Further, the communication between the computer 60 and the X-ray assisting implement 2 can be performed, for example, via a detachable signal line, but it can also be used for wireless or optical communication. Further, the computer 60 can be a general-purpose computer, but a dedicated processor or the like can be attached to the X-ray assisting device 2.
攝像元件安裝部20係安裝X射線攝像元件22的板狀構 件。攝像元件安裝部20被固定於抽出部12之前端，以使板 . 面對於將抽出部12抽出之方向保持略垂直配置。另外，X 射線攝像元件22可由按押彈簧（未圖示）安裝至攝像元件安 裝部20,但X射線攝像元件22亦可固定於攝像元件安裝部 〇 20。又，X射線攝像元件22與攝像元件安裝部20亦可構成 為一體。 X射線裝置50在固持基板10中被固定於與設有抽出部 12的固持基板10之端部呈相反側之端部。又，X射線裝置 5 0被配置為所照射X射線之中心軸（光束中心)L X與安裝於 攝像元件安裝部20的X射線攝像元件22之受光面相正交。 當使用X射線裝置50進行牙齒攝影時，固持基板10之 一部分、抽出部12及安裝有X射線攝像元件22的攝像元 099112480 9 201041560 件安裝部20 於受驗者之口腔内。受驗者咬住固持 基板10 ’而固疋、保持固持基板10之位置。此時，作為攝 衫對象的牙齒Τ之齒軸τχ與固持基板1()之板面呈現垂 直’而平行配置於板面的X射線之中心車由(光束中心)LX係 與齒軸TX呈正交。 再者，當叹持固持基板10時，使攝影對象牙齒τ合致於 固持基板10巾之特定位置(基準位置)ρι，並藉由攝影對象 f # τ其他牙齒咬住固持基板1〇，而將固持基板1〇略 垂直地固定、保持於齒轴Τχ。另外，關於牙齒對於固持基 板10之咬持’彳如圖1所示由牙齒直接咬住固持基板10， 亦可在其間夾人高度調節等構件而純咬住(未圖示）。又， 在固持基板10設有例如表示基準位置Ρ1的記號等。 抽出部12係經由攝傻亓丛h 爾像凡件安裝部20(或X射線攝像元件 22)與顎骨等間之接觸而從 攸口持基板10被抽出，由此對攝像 元件安裝部20進行定位。 又’亦可在將攝像元件安裝部20 插入於口腔内時，預先將抽 抽出。[5 12充分抽出，在插入後， 透過賦予勢能構件14之賦執士 & H勢力使抽出部12靠近於固持基板 10，經由攝像元件安裝部2〇 /、頒骨4之接觸，而對攝像元 件安裝部20進行定位。 因為抽出部12之突出晉你^^一 糸依党驗者口腔内之形狀而異， 因此X射線攝像元件22鱼摄旦,#丄Λ 攝衫對象牙齒Τ之間的距離（第1 距離)L1係依受驗者顎骨形 心狀4而異。圖1之實線係表示第 099112480 10 201041560 1距離L1較短之情況，一點鏈線係表示第1距離L1較長之 情況。如上述，藉由攝像元件安裝部20(或X射線攝像元件 22)與顎骨之接觸，配合口腔内形狀可於每次攝影時就每位 受驗者調整抽出部12之突出量，可調整X射線攝像元件22 之位置。突出量係可透過霍爾感測器等之突出量檢測部16 進行檢測。根據檢測結果而決定第1距離L1。 X射線裝置50係固定於固持基板10上之既定位置處，以 〇 使X射線之中心軸（光束中心)LX沿向抽出部12之抽出方向 且與攝像元件安裝部20保持相對向。亦即，當固持基板10 由齒列適當保持時，齒軸TX垂直於固持基板10之板面， 齒軸TX至X射線裝置50之X射線發光位置PS的距離係 , 略與基準位置P1至X射線發光位置PS對固持基板10板面 之垂足P2的距離（第2距離)L2相等。在此狀態下，從X射 線發光位置PS朝攝影對象牙齒T照射X射線。另外，在固 〇 持基板10設有例如將X射線裝置50定位固定於上述既定 位置的固定部，而X射線裝置50係使用扣件等可裝卸自如 地安裝於該固定部。 對於攝影對象牙齒T而言被配置於X射線裝置50相反側 的X射線攝像元件22，係拍攝從X射線裝置50照射之X 射線所產生之牙齒T投影像。所拍攝獲得之影像信號，係 經由設置在固持基板10或抽出部12内部之纜線而傳送至電 腦60。 099112480 11 201041560 電腦60係對來自X射線攝像元件22之影像施以例如影 像處理而將其輸出至顯示器62而顯示。此時，電腦60係根 據與抽出部12從固持基板10之突出量對應之X射線攝像 元件22與攝影對象牙齒T之間的第1距離L1、及基準位置 P1至點P2之間的第2距離L2，而計算牙齒T與投影在X 射線攝像元件22之牙齒T的影像比率，調整例如輸出給顯 示器62之攝像影像大小。 即，因為從X射線裝置50所照射的X射線係從X射線 發光位置以圓錐狀擴散，因此當X射線攝像元件22越離攝 影對象牙齒T，則X射線攝像元件22的投影像越大。因此， 在具備有攝像元件安裝部20之抽出機構的本實施形態中， 若不考慮突出量而將攝影影像顯示於顯示器62時，依受驗 者不同則在晝面上所顯示牙齒影像之比例尺亦可不同。因 此，在本實施形態中，係可調整大小以使例如晝面上所顯示 牙齒影像之比例尺經常保持相同。 具體而言，電腦60係根據第1距離L1與第2距離L2， 計算出牙齒T與投影在X射線攝像元件22之牙齒T之X 射線投影像間之大小比率R[=L2/(L1+L2)]，並以比率R縮 小經X射線攝像元件22拍攝到之影像。另外，亦可根據X 射線攝像元件22之解析度與顯示器62之解析度，而在顯示 器62顯示出與實際大小相接近的攝影對象牙齒之X射線影 像。 099112480 12 201041560 如上述，根據第1實施形態之口腔内χ射線攝影系統 因為攝像元件安裝部之位置可藉由抽出部進行移動，因此可 在不受口腔内形狀影響下拍攝牙齒之X射線投影像。又， 藉由使攝像元件安裝部(X射線攝像元件）面正交於X射綠之 中心軸’而可獲得無失真之投影影像，同時可根據抽出部之 突出量重現相同縮小比例的X射線投影影像。 其次’參照圖2，說明第2實施形態之口腔内X射線攝^ Ο 系統。第2實施形態之口腔内X射線攝影系統3中，其與 第1實施形態相異處在於抽出部前端部所固定的攝像元件 安裝部之安裝角度及電腦60中之影像處理方法，而其他構 成則與第1實施形態之口腔内X射線攝影系統1相同。因 此’就與第1實施形態相同之構成使用相同元件符號而省略 其說明。 安裝在設於第2實施形態之X射線攝影補助器具4之抽 〇 出部12前端之攝像元件安裝部24之面，斜於固持基板1〇 並非呈垂直，而係對於第1實施形態之攝像元件安裝部2〇 之位置例如以角度Θ朝外側保持傾斜固定。又，第2實施形 態中，第1距離L1為例如攝像元件安裝部24至與抽出部 12相連結之部分(X射線裝置50側）間的距離。即，χ射線 攝像元件22之下邊係配置於此位置。此時，在以距離y偏 離X射線攝像元件22下邊之位置處，牙齒τ之投影像為 (L2+Ll+y · sin9)/L2倍，影像發生失真。 099112480 13 201041560 另一方面’可根據X射線攝像元件22之像素間距計算出 至各像素線的距離y。因此，在第2實施形態中，對攝像影 像’進行與上述倍數或其倒數(比率R)相對應的影像轉換(線 性轉換）。由此，可無關第1距離L1之大小，以相同比例尺 重現無失真牙齒T之X射線投影影像。所重現的影像可顯 示於例如顯示器62。 如上述’第2貫施形悲亦可獲得與第丨實施形態略為同樣 之效果。又，第2實施形態中，攝像元件安裝部係保持傾斜， 因此可沿員骨之傾斜配置X射線攝像元件，可降低突出量。 其次，蒼照圖3 ’說明第3實施形態之口腔内χ射線攝影 系統。第1、第2實施形態中，係使攝影對象牙齒τ合致於 預定之基準位置Ρ1而進行攝影。然而，在第3實施形態之 口腔内X射線攝影系統5中’並未設置基準位置而係使用 感測器等來特定攝影對象牙# Τ之位置。另外，就與第夏 或第2實施形態同樣之構成使用相同元件符號而省略其說 明。 在第3實施形之X射線攝影辅助器具6中，如圖3所 示，在固持基板U上沿X射線之中心轴（光束中心)^二 向，設置複數壓力感測器18。各壓力感測器18係連接 腦60，電腦60將檢測到較大壓力變化的壓力感則器18 位置設為攝影對象牙齒T之位置。又= 6並未具有抽出部’攝像元件安裝部2()係直接以於固持 099112480 201041560 基板11。另外，電腦60係根據 豕所特弋的攝影對象牙齒Τ在 固持基板11上之位置，而計算 το „ aL 异出弟1距離LI與第2距離 。’第3實施形態亦可組合第2實施形態。 如:述’第3實施形態亦可獲得與第i實施形態同樣的效 果。又，因為第3實施形態係藉由 m % 題咬住固持基板之位置 而進仃與顎骨相合致之定位，因 不帛要抽出部之構成，可 使機械構成較簡略。 Ο 另外，本實施形態中，係以χ射 α ^ Μ線裝置為小型且攜帶玄: 易的攜帶X射線裝置之情況為 ]進仃說明。在此情況下， 因為可在固持基板安裝著乂射 农罝，错由使X射線發光 位置與固持基板上之既定位置相人 T9 致，而可簡單地決定第2 距離L2。X，在使用攜帶又射線裝 “ -A- -Τ Θ 第1實施形態中’ 亦可谷易配置使攝影對象牙齒Τ -^ ^ ^ t 菌軸Tx或X射線攝像 〇 射線裝置 兀件之4面與X射線之巾叫（The imaging element mounting portion 20 is a plate-like member to which the X-ray imaging element 22 is mounted. The image pickup device mounting portion 20 is fixed to the front end of the drawing portion 12 such that the plate surface is disposed to be slightly perpendicular to the direction in which the drawing portion 12 is taken out. Further, the X-ray imaging element 22 may be attached to the imaging element mounting portion 20 by a pressing spring (not shown), but the X-ray imaging element 22 may be fixed to the imaging element mounting portion 〇20. Further, the X-ray imaging element 22 and the imaging element mounting portion 20 may be integrally formed. The X-ray device 50 is fixed to the end portion of the holding substrate 10 on the side opposite to the end portion of the holding substrate 10 on which the extraction portion 12 is provided. Further, the X-ray device 50 is disposed such that the central axis (beam center) L X of the X-rays to be irradiated is orthogonal to the light receiving surface of the X-ray imaging element 22 mounted on the imaging element mounting portion 20. When the X-ray apparatus 50 is used for tooth imaging, a part of the holding substrate 10, the extracting portion 12, and the image pickup unit 099112480 9 201041560 in which the X-ray imaging element 22 is attached are mounted in the oral cavity of the subject. The subject bites the holding substrate 10' to fix and hold the position of the substrate 10. At this time, the tooth axis τ 作为 of the tooth 作为 which is the object of the shirt is perpendicular to the plate surface of the holding substrate 1 (), and the center of the X-ray disposed in parallel with the plate surface is (the center of the beam) LX system and the pinion TX Orthogonal. Further, when the holding substrate 10 is held, the photographic subject tooth τ is brought to a specific position (reference position) ρι of the holding substrate 10, and the other substrate is gripped by the photographic subject f # τ, and the holding substrate 1 〇 The holding substrate 1 is fixed vertically and held by the pinion Τχ. Further, regarding the biting of the teeth to the holding substrate 10, the holding substrate 10 is directly bitten by the teeth as shown in Fig. 1, and the members can be bitten by a member such as a height adjustment member (not shown). Further, the holding substrate 10 is provided with, for example, a symbol indicating the reference position Ρ1. The extraction unit 12 is extracted from the mouthpiece substrate 10 by the contact between the image mounting unit 20 (or the X-ray imaging element 22) and the tibia or the like, thereby performing the imaging element mounting unit 20 on the imaging element mounting unit 20. Positioning. Further, when the imaging element mounting portion 20 is inserted into the oral cavity, it may be extracted in advance. [5 12 is sufficiently extracted, and after the insertion, the extraction unit 12 is brought close to the holding substrate 10 by the imparting force of the potential energy member 14 and the contact of the imaging element mounting portion 2〇/, the bone 4 is applied, and The imaging element mounting unit 20 performs positioning. Because the protrusion of the extraction part 12 is different from the shape of the oral cavity of the party, the X-ray imaging element 22 is fish, and the distance between the teeth of the body (the first distance) L1 It varies depending on the subject's humerus shape. The solid line in Fig. 1 indicates the case where the distance L1 is short in the 099112480 10 201041560 1 and the one-point chain line indicates the case where the first distance L1 is long. As described above, by the contact between the imaging element mounting portion 20 (or the X-ray imaging element 22) and the tibia, the shape of the oral cavity can be adjusted to adjust the amount of protrusion of the extraction portion 12 for each subject at each imaging, and the X can be adjusted. The position of the ray imaging element 22. The amount of protrusion can be detected by the protrusion amount detecting unit 16 such as a Hall sensor. The first distance L1 is determined based on the detection result. The X-ray device 50 is fixed to a predetermined position on the holding substrate 10 so that the central axis (beam center) LX of the X-rays is directed in the drawing direction of the drawing portion 12 and is opposed to the image pickup element mounting portion 20. That is, when the holding substrate 10 is properly held by the tooth row, the pinion TX is perpendicular to the plate surface of the holding substrate 10, and the distance between the pinion TX to the X-ray emitting position PS of the X-ray device 50 is slightly from the reference position P1 to The distance (second distance) L2 of the X-ray light-emitting position PS to the foot P2 of the plate surface of the holding substrate 10 is equal. In this state, X-rays are irradiated from the X-ray light-emitting position PS toward the subject's teeth T. Further, the fixed substrate 10 is provided with, for example, a fixing portion for positioning and fixing the X-ray device 50 at the predetermined position, and the X-ray device 50 is detachably attached to the fixing portion by using a fastener or the like. The X-ray imaging element 22 disposed on the opposite side of the X-ray device 50 to the imaging target tooth T captures a T-projection image of the tooth generated by the X-ray irradiated from the X-ray device 50. The image signal obtained by the photographing is transmitted to the computer 60 via a cable provided inside the holding substrate 10 or the drawing unit 12. 099112480 11 201041560 The computer 60 displays an image from the X-ray imaging element 22 by, for example, image processing, and outputs it to the display 62 for display. At this time, the computer 60 is based on the first distance L1 between the X-ray imaging element 22 and the imaging target tooth T corresponding to the amount of protrusion of the extraction unit 12 from the holding substrate 10, and the second position between the reference position P1 and the point P2. The distance L2 is calculated, and the ratio of the image of the tooth T to the tooth T projected on the X-ray imaging element 22 is calculated, and the size of the captured image output to the display 62 is adjusted, for example. In other words, since the X-ray system irradiated from the X-ray device 50 is diffused in a conical shape from the X-ray light-emitting position, the projection image of the X-ray imaging element 22 increases as the X-ray imaging element 22 moves away from the imaging target tooth T. Therefore, in the present embodiment including the extraction mechanism of the imaging element mounting portion 20, when the captured image is displayed on the display 62 regardless of the amount of protrusion, the scale of the dental image displayed on the pupil surface is different depending on the subject. It can also be different. Therefore, in the present embodiment, the size can be adjusted so that, for example, the scale of the dental image displayed on the face is always kept the same. Specifically, the computer 60 calculates the ratio R(=L2/(L1+) between the tooth T and the X-ray projection image of the tooth T projected on the X-ray imaging element 22 based on the first distance L1 and the second distance L2. L2)], and the image captured by the X-ray imaging element 22 is reduced by the ratio R. Further, depending on the resolution of the X-ray imaging element 22 and the resolution of the display 62, the X-ray image of the subject's teeth which is close to the actual size can be displayed on the display 62. As described above, according to the oral cavity X-ray imaging system of the first embodiment, since the position of the imaging element mounting portion can be moved by the extraction portion, the X-ray projection image of the tooth can be taken without being affected by the shape of the oral cavity. . Further, by making the surface of the imaging element mounting portion (X-ray imaging element) orthogonal to the central axis of the X-ray green, a projection image without distortion can be obtained, and the same reduced scale X can be reproduced according to the amount of protrusion of the extraction portion. Ray projection image. Next, the intra-oral X-ray imaging system of the second embodiment will be described with reference to Fig. 2 . The intraoral X-ray imaging system 3 of the second embodiment differs from the first embodiment in the mounting angle of the imaging element mounting portion fixed to the distal end portion of the extraction portion and the image processing method in the computer 60, and other configurations. This is the same as the intraoral X-ray imaging system 1 of the first embodiment. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and their description will be omitted. Mounted on the surface of the image sensor mounting portion 24 provided at the tip end of the drawing unit 12 of the X-ray assisting device 4 of the second embodiment, the substrate 1 is not perpendicular to the holding substrate 1 and is imaged in the first embodiment. The position of the component mounting portion 2 is tilted and fixed, for example, at an angle Θ toward the outside. In the second embodiment, the first distance L1 is, for example, the distance between the imaging element mounting portion 24 and the portion (the X-ray device 50 side) that is connected to the extraction portion 12. That is, the lower side of the X-ray imaging element 22 is disposed at this position. At this time, at a position deviated from the lower side of the X-ray imaging element 22 by the distance y, the projection image of the tooth τ is (L2+L1+y·sin9)/L2 times, and the image is distorted. 099112480 13 201041560 On the other hand, the distance y to each pixel line can be calculated from the pixel pitch of the X-ray imaging element 22. Therefore, in the second embodiment, image conversion (linear conversion) corresponding to the above-described multiple or its reciprocal (ratio R) is performed on the captured image. Thereby, the X-ray projection image of the distortion-free tooth T can be reproduced at the same scale without depending on the size of the first distance L1. The reproduced image can be displayed, for example, on display 62. As described above, the second embodiment can also achieve the same effect as the third embodiment. Further, in the second embodiment, since the imaging element mounting portion is kept inclined, the X-ray imaging element can be placed along the inclination of the member bone, and the amount of protrusion can be reduced. Next, the oral cavity radiography system of the third embodiment will be described with reference to Fig. 3'. In the first and second embodiments, the photographing target tooth τ is brought together at a predetermined reference position Ρ1 to perform photographing. However, in the intraoral X-ray imaging system 5 of the third embodiment, the position of the imaging subject tooth 特定 is specified by using a sensor or the like without setting the reference position. Incidentally, the same components as those in the summer or the second embodiment are denoted by the same reference numerals, and their description will be omitted. In the X-ray assisting implement 6 of the third embodiment, as shown in Fig. 3, a plurality of pressure sensors 18 are provided on the holding substrate U along the central axis (beam center) of the X-rays. Each of the pressure sensors 18 is connected to the brain 60, and the computer 60 sets the position of the pressure sensor 18 that detects a large pressure change to the position of the subject T of the subject. Further, = 6 does not have a drawing portion. The image sensor mounting portion 2 () is directly used to hold the substrate 11 of 099112480 201041560. Further, the computer 60 calculates the distance το „ aL different from the distance LI and the second distance based on the position of the photographic target tooth Τ on the holding substrate 11 . The third embodiment can also be combined with the second embodiment. In the third embodiment, the same effect as that of the i-th embodiment can be obtained. Further, in the third embodiment, the position of the holding substrate by the m% problem is the position of the tibia and the tibia. In addition, in the present embodiment, in the present embodiment, the case where the X-ray device is small and carries the X-ray device is a case where the α α α α Μ 装置 携带 ] ] ] ] ] ] ] ] In this case, since the sputum farm can be attached to the holding substrate, the X-ray illuminating position is made to correspond to the predetermined position on the holding substrate, and the second distance L2 can be easily determined. X, in the use of carrying and ray-mounted "-A--Τ Θ in the first embodiment" can also be configured to make the subject's teeth Τ -^ ^ ^ t bacteria axis Tx or X-ray imaging 〇 兀 device 4 Face and X-ray towel called (
㈣η。 h)LX相正父之X 線裝置亦可為安震於處理室等之普通X射線 ί=π::使x射線發光位置對於固持基板之垂 =於與固持基板上之點Ρ2相對應的位 =Γ=平行地朝向攝像元件安裝部而配置 於與點Ρ2相對應的位置配置X射 線發先位置之情況時，可特定χ射線發光位置，由將第2 距離U輸人m _ 099112480 201041560 可例如在固持基板上設置表示點P2之位置的記號。 本實施形態中，係透過感測器檢測出攝影對象牙齒T合 致於基準位置P1或咬合位置，但亦可人工經由目視而特定 固持基板上攝影對象牙齒T之位置，並使用輸入裝置（未圖 示）輸入至電腦。 再者，電腦亦可具備有記錄有例如攝影影像資料等之内建 記憶體或外接記憶體（未圖示）。在此情況下，亦可在以比率 R縮小攝影影像後而記錄於記憶體，但亦可不縮小而與比率 R等之倍率（縮小率或放大率）、及/或第1、第2距離L1、 L2、Θ、像素間距等影像轉換所必要之資訊一併記錄於記憶 體。又，電腦亦可連接於用於列印攝影影像之印表機（未圖 示），由印表機列印出根據比率R縮小之影像。又，亦可將 未經修正之影像與比率R及比例尺一起輸出至顯示器或印 表機。 又，對抽出部賦予賦勢力之賦予勢能機構，並不受限於彈 性構件，可利用例如將線等進行捲取之機構，或亦可省略。 又，在本實施形態中，係利用電感測器檢測抽出部之突出 量，但亦可利用刻度。 在本實施形態中，係利用CCD等之X射線攝像元件對X 射線投影像進行拍攝，但亦可取代X射線攝像元件，改為 使用X射線膠片而作為X射線像攝像媒體。在此情況下， 可取得比率R、與影像轉換所必要之資訊。又，亦可僅將該 099112480 16 201041560 2貝fi輪出至例如顯不器或印表機等。另外，x射線膠片之 影像可在經例如掃描器等讀取於電腦後，根據該等資訊而進 行影像轉換。 【圖式簡單說明】 圖1係第1實施形態口腔内x射線攝影系統之示意側視 圖0 圖2係第2實卿態口㈣X射賴影系狀示意側視 Ο 圖。 圖3係第3實施形態σ腔内χ射線攝影系統之示音、側視 圖。 〜 • 【主要元件符號說明】 . 1 Ν 3 ' 5 口腔内X射線攝影系統 2、4、6 X射線攝影辅助器具 10、11 固持基板 12 抽出部 14 賦予勢能構件 16 突出量檢測部 18 壓力感測器 20 攝像元件安裝部(攝像媒體保持部) 22 X射線攝像元件(X射線攝像媒體) 24 攝像元件安裝部 50 X射線裝置 099112480 17 201041560 60 電腦(運算部） 62 顯示器 LI 第1距離 L2 第2距離 LX X射線之中心軸（光束中心) PI 特定位置（基準位置） P2 垂足 PS X射線發光位置 T 牙齒 TX 齒軸 099112480 18(4) η. h) The X-ray device of the LX phase positive parent may also be an ordinary X-ray in the processing room, etc. ί=π:: the x-ray illumination position is perpendicular to the holding substrate=corresponding to the point Ρ2 on the holding substrate When the position of the X-ray pre-position is placed in a position corresponding to the point 2 in parallel with the imaging element mounting portion, the X-ray emission position can be specified, and the second distance U is input m _ 099112480 201041560 A mark indicating the position of the point P2 can be provided, for example, on the holding substrate. In the present embodiment, the imaging target tooth T is detected by the sensor to be aligned with the reference position P1 or the occlusion position. However, the position of the photographic subject tooth T on the substrate may be manually fixed by visual observation, and an input device may be used (not shown). Show) input to the computer. Further, the computer may be provided with built-in memory or external memory (not shown) in which, for example, photographic image data is recorded. In this case, the image may be recorded in the memory after the image is reduced by the ratio R, but the magnification (reduction ratio or magnification) and/or the first and second distances L1 may be reduced without being reduced. The information necessary for image conversion such as L2, Θ, and pixel pitch is recorded in the memory. Further, the computer can be connected to a printer (not shown) for printing photographic images, and the printer can print an image reduced according to the ratio R. Alternatively, uncorrected images can be output to the monitor or printer along with the ratio R and scale. Further, the energizing means for imparting a biasing force to the extracting portion is not limited to the elastic member, and may be, for example, a mechanism for winding a wire or the like, or may be omitted. Further, in the present embodiment, the amount of protrusion of the extraction portion is detected by an inductance detector, but a scale may be used. In the present embodiment, the X-ray imaging image is captured by an X-ray imaging element such as a CCD. However, instead of the X-ray imaging element, an X-ray film may be used instead as an X-ray imaging medium. In this case, the ratio R and the information necessary for image conversion can be obtained. Alternatively, the 099112480 16 201041560 2 can be rotated to, for example, a display or a printer. Further, the image of the x-ray film can be image-converted based on the information after being read by a scanner or the like on the computer. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic side view of the intraoral x-ray imaging system of the first embodiment. Fig. 2 is a second side view of the second embodiment of the X-ray image. Fig. 3 is a view showing a sound and a side view of a sigma intra-chamber radiography system according to a third embodiment; ~ • [Description of main component symbols] . 1 Ν 3 ' 5 Intraoral X-ray imaging system 2, 4, 6 X-ray imaging aids 10, 11 Holding substrate 12 Extraction portion 14 Potential energy member 16 Projection amount detecting portion 18 Pressure feeling Detector 20 Imaging device mounting unit (imaging medium holding unit) 22 X-ray imaging device (X-ray imaging medium) 24 Imaging device mounting unit 50 X-ray device 099112480 17 201041560 60 Computer (computing unit) 62 Display LI First distance L2 2 Distance LX X-ray central axis (beam center) PI Specific position (reference position) P2 Foot PS X-ray illumination position T Teeth TX Shaft 099112480 18