Data and data analysis programs for "Enhanced Spatial Resolution in Magnetic Resonance Imaging by Dynamic Nuclear Polarization at 5 K"

These are data and data analysis programs used in the manuscript "Enhanced Spatial Resolution in Magnetic Resonance Imaging by Dynamic Nuclear Polarization at 5 K", by Hsueh-Ying Chen, C. Blake Wilson, and Robert Tycko. final_x_1p7um and final_x_2p6um are experimental MRI images with 1.7 micron and 2.6 micron isotropic resolution. They can be viewed in ImageJ, using Import/Raw with image type=32-bit signed, width=128, height=128, number of images=256. kdata1.txt and kdata4.txt are the k-space data used to generate the 1.7 micron and 2.6 micron resolution images, respectively. transform_kdata1.f95 and transform_kdata4.f95 are Fortran programs to generate images from kdata1.txt and kdata4.txt. simulate_image3.f95 is a Fortran program to fit simulated images with Gaussian point spread functions to the experimental MRI images. sphere_simulation3.f95 is a Fortran program to generate simulated images from simulated k-space data, sampled to a specified value of kmax. power_spectrum1.f95 and power_spectrum2_f95 are Fortran programs to calculate k-space power spectra in planes perpendicular to x and z, respectively, starting with either experimental or simulated images.本数据集包含Hsueh-Ying Chen、C. Blake Wilson与Robert Tycko合著手稿《Enhanced Spatial Resolution in Magnetic Resonance Imaging by Dynamic Nuclear Polarization at 5 K》中使用的实验数据与数据分析程序。 final_x_1p7um与final_x_2p6um为实验磁共振成像（Magnetic Resonance Imaging, MRI）图像，分别具有1.7微米与2.6微米的各向同性分辨率。可通过ImageJ软件导入查看：依次选择Import/Raw导入选项，并设置图像类型为32位有符号整数、宽度128、高度128、图像数量256。 kdata1.txt与kdata4.txt分别为生成上述1.7微米、2.6微米分辨率图像所用的k空间（k-space）数据。 transform_kdata1.f95与transform_kdata4.f95为Fortran程序，分别用于从kdata1.txt与kdata4.txt中生成磁共振图像。 simulate_image3.f95为Fortran程序，用于将带有高斯点扩散函数（Gaussian point spread function）的仿真图像拟合至实验磁共振成像图像。 sphere_simulation3.f95为Fortran程序，用于从经指定kmax值采样的仿真k空间数据中生成仿真磁共振图像。 power_spectrum1.f95与power_spectrum2_f95为Fortran程序，分别用于基于实验或仿真磁共振图像，计算垂直于x轴与z轴平面内的k空间功率谱。