방사선사나라 Radiographer Nara

(영어/영문/English) 7. Slice thickness Width of the slice to be scaned Adjusting the width of the slice by passing a positive current to one side of the slice selection gradient coil and a negative current to the other side. (If a high current is passed, the thickness of the slice becomes thin, and when a low current is passed, the thickness of the slice becomes thick.) As the thickness of the slice..

(영어/영문/English) 5. Matrix It means the number of pixels arranged horizontally and vertically in the image area The smallest unit constituting a matrix of 2D images - pixel (picture cell), 3D - voxel (volume cell) The size of the matrix is ​​in the form of 'frequency encoding number × phase encoding number' of the pixel. Increasing the matrix increases the number of pixels per unit area and incre..

(영어/영문/English) 3. FA (Flip Angle) It means how much angle the longitudinal magnetization component is changed with the RF pulse in the gradient echo image. In the gradient echo image, the longitudinal magnetization component is converted to the transverse magnetization component at an angle between 1º and 90º using RF pulses. The smaller the FA, the closer it is to the T2 weighted image, and th..