公开(公告)号：US20240345196A1

公开(公告)日：2024-10-17

申请号：US18621157

申请日：2024-03-29

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Youngseob SEO

IPC: G01R33/58

CPC classification number: G01R33/58

Abstract: A magnetic resonance imaging (MRI) vibration measurement device for measuring vibrations of an object inserted into an MRI scanner, includes: a human phantom holding apparatus including a human phantom inserted into the MRI scanner in a direction (z-axis, head-to-foot direction); a light source which emits light; a mirror structure which emits the light to the human phantom and provides light reflected by the human phantom; an optical sensor which measures the reflected light to detect z-axis direction vibrations of the human phantom; and a vibration sensor part which is disposed in the human phantom holding apparatus and detects vibrations in both x-axis and y-axis directions which are perpendicular to each other and orthogonal to the z-axis.

公开(公告)号：US20220326288A1

公开(公告)日：2022-10-13

申请号：US17708707

申请日：2022-03-30

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Youngseob SEO

IPC: G01R29/08 ,  A61F2/32 ,  A61F2/46

Abstract: A method of measuring a specific absorption rate (SAR) of a hip joint implant using magnetic resonance imaging (MRI), includes: arranging the hip joint implant in a human lower body-shaped phantom; arranging an electric field sensor around the hip joint implant; providing radio frequency (RF) energy according to an MRI sequence to the human phantom; and calculating the SAR of the hip joint implant from strength of an electric field measured by the electric field sensor.