'Trapped labelled spins'-related signal on arterial spin labelling in the assessment of flow-diverted aneurysms: preliminary experience
| Autor: | Hima Pendharkar, Dwarakanath Srinivas, Sameer Peer, Jitender Saini, Shamick Biswas, Arvinda Hanumanthapura Ramalingaiah, Chandrajit Prasad, Karthik Kulanthaivelu, Arun Kumar Gupta |
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| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Hemodynamics 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Aneurysm Occlusion medicine Humans Radiology Nuclear Medicine and imaging cardiovascular diseases Neuroradiology Retrospective Studies medicine.diagnostic_test business.industry Angiography Digital Subtraction Intracranial Aneurysm Digital subtraction angiography medicine.disease Signal on Cerebral Angiography Cerebral blood flow cardiovascular system Spin Labels Neurology (clinical) Neurosurgery Radiology Cardiology and Cardiovascular Medicine business 030217 neurology & neurosurgery Magnetic Resonance Angiography Follow-Up Studies |
| Zdroj: | NeuroradiologyReferences. 64(1) |
| ISSN: | 1432-1920 |
| Popis: | To investigate ASL-MRI features of flow-diverted aneurysms, review their haemodynamic surrogates, and discuss their pertinent clinical implications. Retrospective single institutional analysis was performed on the clinical and imaging data of patients who underwent digital subtraction angiography (DSA) and ASL-MRI after endovascular flow diversion for cerebral aneurysms. Pseudo-continuous ASL-MRI was performed with post-label delays of 1525–1800 ms. Intra-aneurysmal “trapped labelled spins” (TLS)-related hypersignal, as seen on cerebral blood flow (CBF)-weighted maps of ASL-MRI, was investigated. Intermodality equivalence with DSA [O'Kelly-Marotta (OKM) grading for occlusion], 3D-TOF-MRA, and 3D spin-echo T1-weighted (“black-blood”) images was assessed. Ten cases were included. “TLS” signal was demonstrable in 7/8 (87.5%) of the DSA-visible flow-diverted aneurysms (OKM grade B3, n = 6; OKM grade A3, n = 2). No TLS was seen in both OKM-D (excluded) aneurysms. TLS was not visualised in an OKM-B3 aneurysm with |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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