Meeting Banner
Abstract #3363

Phantom Experiments for Optimal Soft Gating Parameter in Free-Breathing Hepatobiliary Phase MRI with KWIC Reconstruction

Tomohiro Noda1, Keitaro Sofue2, Ryuji Shimada1, Yuichiro Somiya1, Shintaro Horii1, Yoshiko Ueno2, Naoki Yoshida1, Yu Ueda3, Akiko Kusaka1, and Takamichi Murakami2
1Center of Radiology and Radiation Oncology, Kobe University Hospital, Kobe, Japan, 2Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan, 3Philips Japan MR Clinical Science, Tokyo, Japan

In free-breathing radial k-space sampling with KWIC reconstruction, soft gating method can be adopted to reduce motion artifacts. We investigated optimal soft gating parameters for free-breathing hepatobiliary phase MRI. A programmable respiratory motion phantom with varying motion distance of 10, 20, 30 mm was imaged using six values of soft gating factor (SGF). Image contrast and sharpness were analyzed by calculating contrast ratio (CR) and full width at half maximum (FWHM). The CR and FWHM were not inferior compared with the reference standard images in any of the motion distances when the SGF was set at more than 1.4.

This abstract and the presentation materials are available to members only; a login is required.

Join Here