Title:
【発明の名称】X線画像処理装置
Document Type and Number:
Japanese Patent JP2509181
Kind Code:
B2
Abstract:
PURPOSE:To securely remove a scattered X-ray by calculating scattered X-ray components by an arithmetic means which filters a filter coefficient and an original image in an actual or frequency space, and subtracting the scattered X-ray components from the original image in a spot space. CONSTITUTION:A two-dimensional memory 1 stores the original image.T photographed with an X-ray and a scattered X-ray response function storage memory 2 stores the Fourier-transformed value of a scattered X-ray response function. A filter coefficient arithmetic circuit 3 inputs the output of the memory 2 and a photographic condition coefficient outputted by an X-rays rack 7 and performs arithmetic operation based on a specific expression to calculates the filter coefficient in the frequency space. A inverse Fourier transformer 4 receives the output of the circuit 3 and processes the filter coefficient in the frequency space by inverse Fourier transformer to calculate the filter coefficient F in the actual space. A filter arithmetic circuit 5 convolutes the original image T and filter coefficient in the actual space, namely, perform arithmetic operation based upon a specific expression to calculate scattered X-ray components. A subtracter 6 subtracts the scattered X-rays components from the originals image T in the actual space and outputs an image consisting of direct X-ray components.
Inventors:
HONDA MICHITAKA
Application Number:
JP3387886A
Publication Date:
June 19, 1996
Filing Date:
February 20, 1986
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
A61B6/00; H04N5/325; G01N23/04; (IPC1-7): G01N23/04; H04N5/325
Domestic Patent References:
| JP59151940A |
Other References:
【文献】MedicalPhysics,Vol.18,No.2,Mar/Apr1991第219乃至226頁
【文献】MedicalPhysics,Vol.20,No.1,Jan/Feb1993第50乃至69頁
【文献】MedicalPhysics,Vol.20,No.1,Jan/Feb1993第50乃至69頁
Attorney, Agent or Firm:
Noriyuki Noriyuki (1 person outside)