방사선사나라 Radiographer Nara

(영어/영문/English) 1. T1WI (T1 weighted image) To get a T1WI, a short TR and short TE are required. The clinically appropriate TR is 350~750ms, and the TE is 10~30ms. It is easy to see the anatomical structure and is mainly used in contrast imaging. 2. T2WI (T2 weighted image) To get a T2WI, long TR and long TE are needed. Clinically appropriate TR is over 2500ms and TE is 60~120ms. It is easy to i..

(영어/영문/English) The proton density weighted image is an image that obtains a contrast proportional to the number of protons in tissue existing within a patient. This image has the highest signal intensity and is mainly used to observe a wide range of tissues. When the proton density weighted image minimizes the T1 and T2 components as much as possible, a true proton density weighted image is obt..

(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..