Studies of fundamental CT techniques for very low dose PET/CT

2016 Fiscal Year Final Research Report

• Project/Area Number: 25460751
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Epidemiology and preventive medicine
• Research Institution: Osaka University
• Principal Investigator: Yamada Sachiko 大阪大学, 医学部附属病院, 医療技術職員 (40623054)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: CT / 被ばく / 核医学 / dual-energy / 画像再構成 / 画質 / PET / SPECT

Outline of Final Research Achievements

The radiation dose in PET/CT procedures comes not only from internal exposure by administrated radioactive tracers but also from external exposure by the x-ray irradiation. Although most common PET/CT protocols are based on “low-dose” CT, its radiation dose is still non-negligible because reducing radiation dose is also directly associated with decreasing both image quality and quantitative accuracy on CT images. In this study, we applied novel CT acquisition and reconstruction techniques to further reduce radiation dose in PET/CT. The effects of such techniques on image quality and quantitative accuracy were also investigated.

Free Research Field

医学物理学