Fig 1.
A, Transverse SW image showing the anterior septal vein and septal points. The distance between bilateral septal points (white arrowhead) is 6.6 mm. B, Transverse T1-weighted image from the same volunteer showing a wider cavum septi pellucidi. (1, anterior septal vein; white arrow, cavum septi pellucidi).
Fig 2.
Different types of anterior septal veins.
SW images (A1-F1) and the corresponding T1-weighted images (A2-F2) are fused to show the anterior septal veins and their drainage (A3-F3): A1-C1 and A3-C3 represent type 1, and D1-F1 and D3-F3 represent type 2. (arrow, anterior septal vein; arrowhead, caudate nucleus).
Fig 3.
Schematic diagrams showing variations of the ASV-ICV junction.
A, Type IA; B, Type IB; C, Type IIA; D, type IIB. (ASV, anterior septal veins; TSV, thalamostriate vein; FM, foramen of Monro; ICV, internal cerebral vein).
Fig 4.
The fused image formed from T1-weighted and SW images.
The positional relationships between the anterior septal vein and the surrounding brain structures are clearly observed. (1, anterior septal vein; 2, anterior horn of lateral ventricle; 3, deep medullary veins; 4, superior frontal gyrus; 5, middle frontal gyrus).
Table 1.
ASV types in 60 volunteers (120 hemispheres).
Fig 5.
Different types of ASV-ICV junction on SWI.
A, Type IA; B, Type IB (left) and type IIB (right); C, Type IIA; D, Type IIB (left) and type IIA (right). (1, anterior septal vein (ASV); 2, foramen of Monro; 3, thalamostriate vein; 4, internal cerebral vein (ICV)).
Table 2.
Different types of ASV-ICV junction in 60 volunteers (120 hemispheres).