BACKGROUND AND PURPOSE: Spinal arteriovenous shunts usually require digital subtraction angiography (DSA) for evaluation. We report a unique time-resolved spinal MR angiographic (TRSMRA) technique with a temporal resolution of 3-6 seconds and spatial resolution of approximately 1 mm(3) that has the potential to noninvasively detect, localize, and follow-up these cases. MATERIALS AND METHODS: Eleven patients with clinical presentation and/or MR findings suspicious for a spinal arteriovenous shunt were referred for TRSMRA. Patients subsequently underwent spinal DSA to confirm the presence or absence of a shunt or were followed clinically until an alternative diagnosis was found. TRSMRA was also used to predict the level of the shunt in the positive cases. In addition, 2 of these patients as well as a 12th patient referred to us posttreatment received a follow-up TRSMRA to assess treatment outcome. RESULTS: Early venous shunting was identified by using TRSMRA in 6 cases. All 6 were confirmed to have an AV shunt on subsequent spinal DSA. The shunt level predicted by TRSMRA consistently correlated with DSA to within 1 vertebral level. In the 5 patients with a negative screening TRSMRA, DSA or clinical outcome confirmed the absence of an arteriovenous shunt in all of the cases. Posttreatment TRSMRA in 3 patients accurately assessed the success or failure of treatment. CONCLUSION: Combining acceleration techniques to achieve high frame rate TRSMRA provides sufficient temporal and spatial resolution to identify, localize, and follow patients suspected of having a spinal arteriovenous shunt. Further study in a larger population is warranted to assess the accuracy of this technique.
BACKGROUND AND PURPOSE:Spinal arteriovenous shunts usually require digital subtraction angiography (DSA) for evaluation. We report a unique time-resolved spinal MR angiographic (TRSMRA) technique with a temporal resolution of 3-6 seconds and spatial resolution of approximately 1 mm(3) that has the potential to noninvasively detect, localize, and follow-up these cases. MATERIALS AND METHODS: Eleven patients with clinical presentation and/or MR findings suspicious for a spinal arteriovenous shunt were referred for TRSMRA. Patients subsequently underwent spinal DSA to confirm the presence or absence of a shunt or were followed clinically until an alternative diagnosis was found. TRSMRA was also used to predict the level of the shunt in the positive cases. In addition, 2 of these patients as well as a 12th patient referred to us posttreatment received a follow-up TRSMRA to assess treatment outcome. RESULTS: Early venous shunting was identified by using TRSMRA in 6 cases. All 6 were confirmed to have an AV shunt on subsequent spinal DSA. The shunt level predicted by TRSMRA consistently correlated with DSA to within 1 vertebral level. In the 5 patients with a negative screening TRSMRA, DSA or clinical outcome confirmed the absence of an arteriovenous shunt in all of the cases. Posttreatment TRSMRA in 3 patients accurately assessed the success or failure of treatment. CONCLUSION: Combining acceleration techniques to achieve high frame rate TRSMRA provides sufficient temporal and spatial resolution to identify, localize, and follow patients suspected of having a spinal arteriovenous shunt. Further study in a larger population is warranted to assess the accuracy of this technique.
Authors: T A Cashen; J C Carr; W Shin; M T Walker; S F Futterer; A Shaibani; R M McCarthy; T J Carroll Journal: AJNR Am J Neuroradiol Date: 2006-04 Impact factor: 3.825
Authors: G Forbes; D A Nichols; C R Jack; D M Ilstrup; D B Kispert; D G Piepgras; D O Wiebers; F Earnest; P L Axley Journal: Radiology Date: 1988-11 Impact factor: 11.105
Authors: D R Hadizadeh; G M Kukuk; D T Steck; J Gieseke; H Urbach; H J Tschampa; S Greschus; A Kovàcs; M Möhlenbruch; A Bostroem; H H Schild; W A Willinek Journal: AJNR Am J Neuroradiol Date: 2012-02-02 Impact factor: 3.825
Authors: Christopher S Eddleman; Hyun Jeong; Ty A Cashen; Matthew Walker; Bernard R Bendok; H Hunt Batjer; Timothy J Carroll Journal: Neurosurg Focus Date: 2009-01 Impact factor: 4.047