방사선사나라 Radiographer Nara

(영어/영문/English) Gradient magnetic field? In order to find the position information of the human body in the uniform magnetic field, another gradient magnetic field is given. And it is generated by flowing an electric current through a current amplifier to the gradient coil installed inside the main magnet. The two purposes of the gradient magnetic field are the selection of a slice and the measu..

(영어/영문/English) 1. T2 Decay (T2 relaxation, Transverse relaxation, Spin-Spin relaxation) MR signal decreases due to interaction between spins The RF pulse causes the magnetization (or spin) arranged in the vertical axis (Z) alongside the external magnetic field to lie in the horizontal (X-Y) plane. At this time, the phase of the spins is in-phase. Over time, in-phase spins are dispersed in the t..

(영어/영문/English) Larmor frequency causes the longitudinal magnetization to lie on the horizontal plane (XY) , and then all spins in the same phase are rapidly dephased by interaction of spins and spins and inhomogeneity of the local magnetic field. (decay, incoherence, dephase, fan-out) It is the T2 weighted image that uses the phenomenon in which the spins in the transverse magnetization state a..

(영어/영문/English) In the process of recovering the spins of the human body (recovering to the original state of the longitudinal magnetization) after receiving energy, the T1 weighted image is the image of the difference in T1 recovery time between tissues. The T1 weighted image is obtained by appropriately adjusting TR and TE. (the extrinsic factors representing the contrast of the image) The mos..

안녕하세요 오늘부터 티스토리 블로그를 시작하게된 방사선사나라 입니다. 저는 제 전공 분야 공부를 위해서 블로그를 시작하게 되었고요 티스토리의 제목처럼 방사선사(radiographer)가 궁금해할만한 내용들 위주로 포스팅할 예정입니다. (MRI, 일반촬영, 해부학, 의학용어 등) 이왕이면 전공에 대한 모든 글을 국문과 영문으로 올릴 예정이니 많이 봐주시고 응원해주세요~