Manufacture of scattered-ray removed image of gamma camera and emission ct

Abstract

Abstract PURPOSE:To obtain a scattered-ray removed image with high definition by using a multichannel pulse hight analyzer and an image processing computer. CONSTITUTION:A conventional gamma camera and an emission CT only collect photoelectric peak images by a collimator and a pulse hight analyzer although the dose of scattered rays increases as a scattering body bocomes thicker or as a ray cource increases in capacity, and the photoelectric peak image contains many scattered rays. For the purpose, the multichannel pulse hight analyzer collects an image of Compton scattered rays in a energy range close to a photoelectric peak, the peak image is multiplied by a coefficient obtained simultaneously with the image, and the result is subtracted from the photelectric peak image to obtain an image.

Inventors

• 👤 Shoichi Yasui
• 👤 安井　正一

Bibliographic Details