Using both ASL and SWAN, we were able to improve
the detection of AVS without the use of gadolinium
Two non-contrast MR imaging techniques used in
combination, namely 3D ASL and SWAN, may o;er a
noninvasive and practical alternative to CE-MRA for the
detection of intracranial AVS. Such a ;nding is of clinical
relevance if one considers the risk of nephrogenic systemic
;brosis in patients with renal insu;ciency. Other limitations
of the use of gadolinium chelate are related to age, pregnancy
or lactation, and the recent data regarding gadolinium
retention in deep brain nuclei. Special attention should
also be given to hyperintense signal in venous structures
on merged ASL/SWAN images because it appears highly
correlated with AVS.
1. Hodel J, Leclera X, Kalsoum E, e T al. Intracranial Arteriovenous Shunting: Detection with
Arterial Spin – Labeling and Susceptibility – Weighted Imaging Combined. Published online
before print October 27, 2016, doi: 10.3174/ajnr. A 4961. AJNR 2016.
Jérôme Hodel, MD, PhD, is the Head of Neuroradiology at Henri Mondor Hospital in Creteil, France.
Saint Joseph Hospital is a 746-bed, private, non-pro;t public service hospital. In January 2006, Saint Michel Hospital and Notre Dame de Bon Secours Hospital
joined Saint-Joseph to form the Paris Saint-Joseph Hospital Group. Today, the three hospitals provide a full range of heath services for patients south of Paris.
Parameters SWAN ASL
Frequency FOV: 24 cm 24 cm
Phase FOV: 0.8 1
Slice thickness: 3.0 mm 4.0 mm
Frequency direction: A/P
TR: min 4,611 ms
Flip angle: 15
Phase: 224 1,525 ms
Phase acceleration: 2