JPH0369976U

JPH0369976U -

Info

Publication number: JPH0369976U
Application number: JP12840489U
Authority: JP
Priority date: 1989-10-31
Filing date: 1989-10-31
Publication date: 1991-07-12

Description

[Brief explanation of drawings]

第１図ないし第８図は、この考案の一実施例に
係り、第１図はデジタルサブトラクシヨン装置の
斜視図、第２図は可動天板の移動機構を示す断面
図、第３図は可動天板の作用を説明する正面図、
第４図ａ〜ｃはＸ線管およびＸ線イメージインテ
ンシフアイヤの回転動作を説明する側面図、第５
図は画像処理部の概略構成を示すブロツク図、第
６図は歪み補正用フアントムの概略斜視図、第７
図は歪み補正を説明する図、第８図は二方向のＸ
線透視撮影装置の側面図である。また、第９図は
従来例に係るデジタルサブトラクシヨン処理部の
概略構成を示すブロツク図である。７……天板、１０……ラツク、１１……ピニオ
ンギヤ、１２……モーター、１９……歪み補正部
、２２……歪み補正用データ算出部、Ｆ……歪み
補正用フアントム。 1 to 8 relate to one embodiment of this invention, in which FIG. 1 is a perspective view of a digital subtraction device, FIG. 2 is a sectional view showing a moving mechanism of a movable top plate, and FIG. 3 is a perspective view of a digital subtraction device. A front view explaining the action of the movable top plate,
4a to 4c are side views illustrating the rotational operation of the X-ray tube and the X-ray image intensifier ear;
The figure is a block diagram showing the schematic configuration of the image processing unit, FIG. 6 is a schematic perspective view of the distortion correction phantom, and FIG.
The figure is a diagram explaining distortion correction, and Figure 8 shows the X direction in two directions.
FIG. 2 is a side view of the fluoroscopic imaging device. Further, FIG. 9 is a block diagram showing a schematic configuration of a conventional digital subtraction processing section. 7... Top plate, 10... Rack, 11... Pinion gear, 12... Motor, 19... Distortion correction section, 22... Distortion correction data calculation section, F... Distortion correction phantom.

Claims

[Scope of utility model registration request]

a phantom for distortion correction provided on a movable top plate that can be moved in the horizontal direction with a subject placed thereon; and a movement control means that moves the movable top plate and places the phantom and the subject at imaging positions, respectively. and,
Distortion correction data calculating means for calculating distortion correction data from phantom image data obtained by photographing the phantom; and distortion correction means for correcting distortion of the subject image based on the distortion correction data. A digital subtraction device characterized by: