今天读文献时看到白质纤维中有association, commissural, and projection fibers的分类，翻译过来分别是连合纤维，联络纤维和投射纤维
很有意思，也学习下。
连合纤维：包括胼胝体、前联合、穹隆连合
联合纤维：包括扣带、钩束、上纵束、下纵束、上枕额束、下枕额束、弓状纤维
投射纤维：包括皮质脊髓束、视放射、内测丘系、小脑上脚、小脑中脚、小脑下脚
参考链接：https://wenku.baidu.com/view/5cca02164028915f814dc2c0.html
20190319
ICBM DTI-81 Atlas 模板介绍：
Overview
The ICBM DTI-81 Atlas is a stereotaxic probabilistic white matter atlas that fuses DTI-based white matter information with an anatomical template (ICBM-152). This atlas is based on probabilistic tensor maps obtained from 81 normal subjects acquired under an initiative of the International Consortium of Brain Mapping (ICBM). The subjects were normal right-handed adults ranging from 18 to 59 years of age. A hand-segmented white matter parcellation map was created from this averaged map. This map can be used for automated white matter parcellation. The precision of the affine-based image normalization and automated parcellation was measured for a group of normal subjects using manually defined anatomical landmarks.
Methods
All studies were obtained on 1.5T MR units (Siemens). DT imaging data were acquired by using a single-shot, echo-planar imaging sequence with sensitivity encoding and a parallel imaging factor of 2.0. Transverse sections of 2.5 mm thickness were acquired parallel to the anterior commissure-posterior commissure line.
The raw diffusion-weighted images (DWIs) were first co-registered to one of the least diffusion-weighted images and corrected for subject motion with 6-mode rigid transformation with Automated Image Registgration (AIR). The average of all DWIs (aDWI) was calculated and used for a DTI-based anatomic image. For anatomical images to drive the normalization process, aDWIs were used. These images were normalized to the template (ICBM-152) using a 12-mode affine or 4th order polynomial non-linear transformation of AIR. The transformation matrix was then applied to the calculated diffusion tensor field.
In the white matter parcellation map (WMPM), deep white matter regions were manually segmented into various anatomic structures based on fiber orientation information. In the WMPM, the following white matter structures are identified and partitioned:
Tracts in the brainstem:
- Corticospinal tracts (CST)
- Medial lemniscus (ML)
- Medial longitudinal fasciculus (MLF)
- Inferior cerebellar peduncle (ICP)
- Middle cerebellar peduncle (MCP)
- Superior cerebellar peduncle (SCP)
Projection fibers:
- Corona radiata
- Anterior limb of internal capsule (ALIC)
- Posterior limb of internal capsule (PLIC)
- Retrolenticular part of the internal capsule (RLIC)
- Cerebral peduncle (CP)
Association fibers:
- Superior longitudinal fasciculus (SLF)
- Superior fronto-occipital fasciculus (SFO)
- Uncinate fasciculus (UNC)
- Inferior fronto-occipital fasciculus (IFO) / Uncinate fasciculus (UNC)
- Inferior fronto-occipital fasciculus (IFO) / Inferior longitudinal fasciculus (ILF)
- Sagittal Stratum (SS)
- External capsule (EC)
- Cingulum (CG)
- Fornix (FX) and Stria terminalis (ST)
Commissural fibers:
- Anterior commissure (AC)
- Corpus callosum (CC)
- Tapetum (TAP)
Additional information about this atlas is available at the following resources:
http://sci-hub.tw/10.1016/j.neuroimage.2007.12.035
http://sci-hub.tw/10.1016/j.neuroimage.2008.07.009
http://sci-hub.tw/10.1006/nimg.1995.1012
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1088516/
http://www.ncbi.nlm.nih.gov/pubmed/11522763
http://www.ncbi.nlm.nih.gov/pubmed/17266101
Reference:http://www.bmap.ucla.edu/portfolio/atlases/ICBM_DTI-81_Atlas/
20200319 Update
