JP2008000190A5 - - Google Patents

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JP2008000190A5
JP2008000190A5 JP2006169994A JP2006169994A JP2008000190A5 JP 2008000190 A5 JP2008000190 A5 JP 2008000190A5 JP 2006169994 A JP2006169994 A JP 2006169994A JP 2006169994 A JP2006169994 A JP 2006169994A JP 2008000190 A5 JP2008000190 A5 JP 2008000190A5
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被検体の３次元画像データを記憶する記憶する記憶手段と、
前記３次元画像データに基づいて、複数のＸ線エネルギを考慮した仮想的なＸ線診断装置のＸ線検出器の検出面に投影される模擬Ｘ線画像を生成する模擬Ｘ線画像生成手段と、
Ｘ線撮影を実行することによって前記被検体のＸ線画像を収集するＸ線画像収集手段と、
前記Ｘ線画像および前記模擬Ｘ線画像を表示させる表示手段と、
を有することを特徴とするＸ線診断装置。 Storage means for storing three-dimensional image data of the subject;
On the basis of the three-dimensional image data, and the simulated X-ray image generating means for generating a simulated X-ray image projected on the detection surface of the X-ray detector of the virtual X-ray diagnostic apparatus considering a plurality of X-ray energy ,
X-ray image collection means for collecting an X-ray image of the subject by performing X-ray imaging;
Display means for displaying the X-ray image and the simulated X-ray image;
An X-ray diagnostic apparatus comprising: 前記模擬Ｘ線画像生成手段は、
前記３次元画像データ内の各ボクセルに臓器の属性情報を割当てる臓器割当部と、
前記臓器の属性情報に基づいて、前記各ボクセルにＸ線吸収特性を割当てる吸収特性割当部と、
Ｘ線のエネルギスペクトル、および前記各ボクセルに割当てられた前記Ｘ線吸収特性に基づいて、前記模擬Ｘ線画像を生成する画像作成部と、
を備えることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means includes:
An organ assignment unit for assigning organ attribute information to each voxel in the three-dimensional image data;
An absorption characteristic assigning unit for assigning an X-ray absorption characteristic to each voxel based on the organ attribute information;
An image generating unit that generates the simulated X-ray image based on an X-ray energy spectrum and the X-ray absorption characteristics assigned to each voxel;
X-ray diagnostic apparatus according to claim 1, characterized in that it comprises. 前記模擬Ｘ線画像生成手段は、
前記３次元画像データ内の各ボクセルに臓器の属性情報を割当てる臓器割当部と、
前記臓器の属性情報に基づいて、臓器を構成する元素の組成情報から前記３次元画像データ内の前記各ボクセルに元素の構成を示す元素構成情報を割当てる構成元素割当部と、
前記元素構成情報と元素のＸ線吸収特性とに基づいて前記３次元画像データ内の前記各ボクセルにＸ線吸収特性を割当てる吸収特性割当部と、
前記Ｘ線撮影に用いられるＸ線のエネルギスペクトルおよび前記Ｘ線の投影方向を取得する撮影条件取得手段と、
前記Ｘ線のエネルギスペクトル、前記Ｘ線の投影方向、前記各ボクセルに割当てられた前記Ｘ線吸収特性に従って、前記模擬Ｘ線画像を生成する画像作成部と、
を備えることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means includes:
An organ assignment unit for assigning organ attribute information to each voxel in the three-dimensional image data;
Based on the attribute information of the organ, a constituent element assigning unit that assigns element constituent information indicating the constituent of the element to each voxel in the three-dimensional image data from the composition information of the element constituting the organ;
An absorption characteristic assigning unit for assigning an X-ray absorption characteristic to each voxel in the three-dimensional image data based on the element configuration information and an X-ray absorption characteristic of the element;
An imaging condition acquisition means for acquiring an X-ray energy spectrum used for the X-ray imaging and a projection direction of the X-ray;
An image generation unit that generates the simulated X-ray image according to the X-ray energy spectrum, the X-ray projection direction, and the X-ray absorption characteristics assigned to each voxel;
The X-ray diagnostic apparatus according to claim 1, further comprising: 前記模擬Ｘ線画像生成手段は、前記３次元画像データおよび前記仮想的なＸ線診断装置が備えられる仮想空間と前記Ｘ線撮影が実行される実空間との間で位置あわせを行った後、前記模擬Ｘ線画像を生成するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means performs alignment between the virtual space in which the three-dimensional image data and the virtual X-ray diagnostic apparatus are provided and the real space in which the X-ray imaging is performed, The X-ray diagnostic apparatus according to claim 1, wherein the apparatus is configured to generate the simulated X-ray image. 前記模擬Ｘ線画像生成手段は、前記Ｘ線撮影における撮影条件から求められるＸ線のスペクトルと同等に分布するスペクトルおよび前記撮影条件から求められる前記Ｘ線のスペクトルよりも低エネルギ側に分布するスペクトルのいずれかのスペクトルを用いて前記模擬Ｘ線画像を生成するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means includes a spectrum distributed equally to an X-ray spectrum obtained from an imaging condition in the X-ray imaging and a spectrum distributed on a lower energy side than the X-ray spectrum obtained from the imaging condition. The X-ray diagnostic apparatus according to claim 1, wherein the simulated X-ray image is generated using any one of the spectra. 前記模擬Ｘ線画像生成手段は、前記Ｘ線撮影における撮影条件から求められるＸ線のスペクトルの平均エネルギと同等の平均エネルギを有するスペクトルおよび前記撮影条件から求められる前記Ｘ線のスペクトルの平均エネルギよりも小さい平均エネルギを有するスペクトルのいずれかのスペクトルを用いて前記模擬Ｘ線画像を生成するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means is based on a spectrum having an average energy equivalent to an average energy of an X-ray spectrum obtained from an imaging condition in the X-ray imaging and an average energy of the X-ray spectrum obtained from the imaging condition. The X-ray diagnostic apparatus according to claim 1, wherein the simulated X-ray image is generated using any one of spectra having a smaller average energy. 前記模擬Ｘ線画像生成手段は、前記Ｘ線画像との一致度が十分になるように前記模擬Ｘ線画像のマッチングを行うように構成されることを特徴とする請求項１記載のＸ線診断装置。 The X-ray diagnosis according to claim 1, wherein the simulated X-ray image generation unit is configured to perform matching of the simulated X-ray image so that the degree of coincidence with the X-ray image is sufficient. apparatus. 前記模擬Ｘ線画像生成手段は、前記Ｘ線画像との一致度が十分になるように前記模擬Ｘ線画像の平行移動、回転移動、投影方向の変更およびワープの少なくとも１つを伴うマッチングを行うように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means performs matching involving at least one of translation, rotation, projection direction change, and warp of the simulated X-ray image so that the degree of coincidence with the X-ray image is sufficient. The X-ray diagnosis apparatus according to claim 1, wherein the X-ray diagnosis apparatus is configured as described above. 前記模擬Ｘ線画像生成手段は、前記Ｘ線撮影における撮影条件から求められるＸ線のスペクトルからマッチング用の模擬Ｘ線画像を作成し、前記Ｘ線撮影における撮影条件から求められるＸ線のスペクトルとは別のスペクトルから得られる模擬Ｘ線画像の位置を、前記マッチング用の模擬Ｘ線画像と前記Ｘ線画像との一致度が十分になるための条件を示す修正情報を用いて修正するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means creates a simulated X-ray image for matching from the X-ray spectrum obtained from the imaging conditions in the X-ray imaging, and the X-ray spectrum obtained from the imaging conditions in the X-ray imaging Corrects the position of the simulated X-ray image obtained from another spectrum by using correction information indicating a condition for sufficient matching between the simulated X-ray image for matching and the X-ray image. The X-ray diagnostic apparatus according to claim 1, which is configured. 前記模擬Ｘ線画像生成手段は、Ｘ線の散乱線成分と直接線成分とを所定の混合比にて加算することによって前記模擬Ｘ線画像を作成し、かつ前記Ｘ線画像との一致度が十分になるように前記模擬Ｘ線画像のマッチングを行うように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means creates the simulated X-ray image by adding the scattered ray component of the X-ray and the direct ray component at a predetermined mixing ratio, and has a degree of coincidence with the X-ray image. The X-ray diagnosis apparatus according to claim 1, wherein the simulation X-ray image is matched so as to be sufficient. 前記模擬Ｘ線画像生成手段は、Ｘ線の散乱線成分と直接線成分とを所定の混合比にて加算することによってマッチング用の模擬Ｘ線画像を作成し、前記直接線成分のみから作成された模擬Ｘ線画像の位置を、前記マッチング用の模擬Ｘ線画像と前記Ｘ線画像との一致度が十分になるための条件を示す修正情報を用いて修正するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means creates a simulated X-ray image for matching by adding the scattered ray component of the X-ray and the direct ray component at a predetermined mixing ratio, and is created only from the direct ray component. The position of the simulated X-ray image is corrected using correction information indicating a condition for the degree of coincidence between the simulated X-ray image for matching and the X-ray image to be sufficient. The X-ray diagnostic apparatus according to claim 1. 前記模擬Ｘ線画像生成手段は、投影方向の変更指示があった場合に変更後の投影方向を用いて前記模擬Ｘ線画像を作成するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The said simulated X-ray image production | generation means is comprised so that the said simulated X-ray image may be produced using the projection direction after a change, when there exists a change instruction | indication of a projection direction. X-ray diagnostic equipment. 前記模擬Ｘ線画像生成手段は、前記模擬Ｘ線画像の計算において、関心のある臓器および関心のない臓器の少なくとも一方を構成する元素の組成、密度および吸収係数の少なくとも１つを所定の割合で増減させることによって、前記関心のある臓器のコントラストが強調された模擬Ｘ線画像を作成するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation means calculates at least one of the composition, density, and absorption coefficient of elements constituting at least one of an organ of interest and an organ of no interest at a predetermined ratio in the calculation of the simulated X-ray image. The X-ray diagnostic apparatus according to claim 1, wherein the X-ray diagnostic apparatus is configured to create a simulated X-ray image in which the contrast of the organ of interest is enhanced by increasing or decreasing. 前記模擬Ｘ線画像生成手段は、前記模擬Ｘ線画像の計算において、前記３次元画像データ上の指定されたボクセルに対応する前記模擬Ｘ線画像上の画素が強調されるように前記模擬Ｘ線画像を作成するように構成されることを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generation unit is configured to calculate the simulated X-ray image so that pixels on the simulated X-ray image corresponding to a designated voxel on the three-dimensional image data are emphasized. The X-ray diagnosis apparatus according to claim 1, wherein the X-ray diagnosis apparatus is configured to generate an image. 前記模擬Ｘ線画像生成手段は、心電同期下で収集された３次元画像データから心電位相ごとに複数の模擬Ｘ線画像を生成するように構成される一方、
前記表示手段は、心電同期下で撮影されたＸ線画像の心電位相と同位相の模擬Ｘ線画像を同じタイミングで表示するように構成される
ことを特徴とする請求項１記載のＸ線診断装置。 The simulated X-ray image generating means is configured to generate a plurality of simulated X-ray images for each electrocardiographic phase from the three-dimensional image data collected under electrocardiographic synchronization,
The X-ray image according to claim 1, wherein the display means is configured to display a simulated X-ray image having the same phase as the electrocardiographic phase of the X-ray image taken under electrocardiogram synchronization at the same timing. Line diagnostic equipment. Ｘ線撮影を実行することによって被検体のＸ線画像を収集するＸ線画像収集手段と、
前記Ｘ線撮影における撮影条件に基づいて前記被検体の３次元画像データを処理する画像処理手段と、
を有することを特徴とするＸ線診断装置。 X-ray image collection means for collecting an X-ray image of a subject by performing X-ray imaging;
Image processing means for processing three-dimensional image data of the subject based on imaging conditions in the X-ray imaging;
An X-ray diagnostic apparatus comprising: 被検体の３次元画像データから仮想的なＸ線診断装置のＸ線検出器の検出面に投影される模擬Ｘ線画像を生成するステップと、
Ｘ線撮影を実行することによって収集された前記被検体のＸ線画像とともに前記模擬Ｘ線画像を表示させるステップと、
を有することを特徴とするＸ線診断装置におけるデータ処理方法。 Generating a simulated X-ray image projected on the detection surface of the X-ray detector of the virtual X-ray diagnostic apparatus from the three-dimensional image data of the subject;
Displaying the simulated X-ray image together with the X-ray image of the subject acquired by performing X-ray imaging;
A data processing method in an X-ray diagnostic apparatus characterized by comprising: 被検体のＸ線撮影における撮影条件を取得するステップと、
前記撮影条件に基づいて前記被検体の３次元画像データを処理するステップと、
を有することを特徴とするＸ線診断装置におけるデータ処理方法。 Acquiring imaging conditions for X-ray imaging of the subject;
Processing three-dimensional image data of the subject based on the imaging conditions;
A data processing method in an X-ray diagnostic apparatus characterized by comprising:
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