Comparison and calibration of MP2RAGE quantitative T1 values to multi-TI inversion recovery T1 values.

• Tác giả: Chenyu Gao, Michael E Kim, Aravind R Krishnan, Bennett A Landman, Kristin P O'Grady, Lucas W Remedios, Adam M Saunders, Kurt G Schilling, Seth A Smith
• Ngôn ngữ: eng
• Ký hiệu phân loại: 363.232 Patrol and surveillance
• Thông tin xuất bản: Netherlands : Magnetic resonance imaging , 2025
• Bộ sưu tập: NCBI
• ID: 176384

Tóm tắt

While typical qualitative T1-weighted magnetic resonance images reflect scanner and protocol differences, quantitative T1 mapping aims to measure T1 independent of these effects. Changes in T1 in the brain reflect structural changes in brain tissue. Magnetization-prepared two rapid acquisition gradient echo (MP2RAGE) is an acquisition protocol that allows for efficient T1 mapping with a much lower scan time per slab compared to multi-TI inversion recovery (IR) protocols. We collect and register B1-corrected MP2RAGE acquisitions with an additional inversion time (MP3RAGE) alongside multi-TI selective inversion recovery acquisitions for four subjects. We use a maximum a posteriori (MAP) T1 estimation method for both MP2RAGE and compare to typical point estimate MP2RAGE T1 mapping, finding no bias from MAP MP2RAGE but a sensitivity to B