Výsledky vyhledávání - "Omer F. Oran"

Demonstration and suppression of respiration-related artifacts in Bloch–Siegert shift-based B1+ maps of the human brain

Autor: Ravi S. Menon, Omer F. Oran, L. Martyn Klassen, Hacene Serrai

Publikováno v: Brain and Mind Institute Researchers' Publications

Respiration-induced movement of the chest wall and internal organs causes temporal B variations extending throughout the brain. This study demonstrates that these variations can cause significant artifacts in (Formula presented.) maps obtained at 7 T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::625ef3cc202ed186c9d63b47950ed475
https://ir.lib.uwo.ca/brainpub/557

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Using variable-rate selective excitation (VERSE) radiofrequency pulses to reduce power deposition in pulsed arterial spin labeling sequence at 7 Tesla

Autor: Ravi S. Menon, Omer F. Oran, Sagar Buch, Hacene Serrai

Publikováno v: Brain and Mind Institute Researchers' Publications

Purpose Arterial spin labeling (ASL) is an established noninvasive MRI technique used for cerebral blood flow measurement, which generally suffers from a low signal-to-noise ratio (SNR). The use of ultra-high fields to enhance sensitivity inevitably

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d5952f2646b760c54e7fe27042f44907
https://ir.lib.uwo.ca/brainpub/558

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Elimination of low-inversion-efficiency induced artifacts in whole-brain MP2RAGE using multiple RF-shim configurations at 7 T

Autor: Joseph S. Gati, L. Martyn Klassen, Ravi S. Menon, Omer F. Oran, Kyle M. Gilbert

Publikováno v: Brain and Mind Institute Researchers' Publications

The magnetization-prepared two-rapid-gradient-echo (MP2RAGE) sequence is used for structural T -weighted imaging and T mapping of the human brain. In this sequence, adiabatic inversion RF pulses are commonly used, which require the B magnitude to be

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbae08a0121e5139a570b0c4635403fa
https://pubmed.ncbi.nlm.nih.gov/32749022