Evaluation of the Lenticulostriate Arteries with Rotational Angiography and 3D Reconstruction
Hyun-Seung Kanga,
Moon Hee Hana,b,c,
Bae Ju Kwona,
O-Ki Kwond,
Sung Hyun Kime and
Kee-Hyun Changa,b,c
a Department of Radiology, Seoul National University College of Medicine, Korea
b the Clinical Research Institute, Seoul National University Hospital, Korea
c the Institute of Radiation Medicine, Seoul National University Medical Research Center, Korea
d the Department of Neurosurgery, Seoul National University Bundang Hospital, Korea
e Department of Diagnostic Radiology, Seoul National University Bundang Hospital, Korea
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FIG 1. Choosing an adequate threshold is important for demonstrating the LSAs clearly. Posterior images of the right ICA.
A, LSA stump arising at the proximal A1 region.
B, An adequate threshold is selected, and three branches (arrow) stemming from an LSA trunk are clearly depicted.
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FIG 2. Origins of the LSAs.
A, On the anteroposterior left ICA angiogram, exact origins of the LSAs cannot be evaluated.
B, On the posterior 3D reconstructed image, separate origins of the lateral LSAs are well delineated (arrows). A duplicated MCA (arrowhead in B and C) arises just proximal to the ICA bifurcation, giving cortical branches to anterior temporal lobe. No perforators from the duplicated MCA can be identified.
C, On the superior view, destinations of the LSAs (circles) and the origin of a medial LSA (arrow) are well demonstrated. LSAs with a more lateral origin supply the more posterior areas of the central brain.
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FIG 3. Direction of LSAs.
A and B, Anterior (A) and medial (B) images. More medially located LSA (arrow) divides into two branches and has the more anterior direction of supply. More lateral LSA (arrowhead) arises as a single trunk and has the more posterior direction of supply.
C and D, Anterior (C) and superior (D) images. LSA arising from the A1-A2 junction (recurrent artery of Heubner, arrow) is directed anteriorly on the superior view. LSA arising from the superior division of the MCA (arrowhead) is directed posteriorly.
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FIG 4. Examples of LSA configurations. Arrows indicate the origins of LSAs.
A and B, Posterior (A) and anterior (B) images of MDS/LPS configuration (n = 27, 15%).
C and D, Anterior (C) and posterior (D) images of MPS/LPS configuration (n = 10, 5%).
E and F, Posterior (E) and anterior (F) images of MDS/MPS configuration (n = 2, 1%).
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FIG 5. Configurations of accessory MCAs and LSAs.
A, Accessory MCA of distal origin arising from the A2 segment of the ACA gives off an LSA (arrow).
B, Accessory MCA of proximal origin arising from proximal A1 segment of the ACA gives off LSAs (arrow).
C, Accessory MCA of distal origin gives off a recurrent artery of Heubner (arrow). A separate LSA (arrowhead) arises from the MCA.
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