画像処理装置、磁気共鳴撮像装置、及び、信号分離方法
JP7891892B2Active Publication Date: 2026-07-17FUJIFILM CORP
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- FUJIFILM CORP
- Filing Date
- 2022-09-30
- Publication Date
- 2026-07-17
AI Technical Summary
Benefits of technology
【0015】 本発明によれば、個々の代謝物質の信号を分離した信号方程式を解いて各信号の第2推定を行うのに先立って、第2推定処理に用いる信号方程式に含まれる変数を精密化する第1推定処理を行うことにより、信号方程式を解くために必要な画像数が最小限の数であっても、精度を劣化させることなく安定して信号分離を実現することができる。それにより、各代謝物質が含まれる組織や部位に関する詳細な情報、及び水と脂肪とを精度よく分離した見かけの横磁化緩和速度R2*を得ることができる。
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Abstract
To calculate each peak intensity of fat multi-peaks individually and highly accurately with the number of to-be-estimated variables reduced when separating water and fat by applying the Dixon method.SOLUTION: Multiple images made up of signals acquired at different echo times (TEs) are used to solve a predetermined signal equation (signal model) expressing the relation between the pixel values (signal values) of the images and imaging parameters such as signal intensities of components and TE, thereby performing separation of signals for each component. For separating the signals, at least one of the variables (other than the signal intensity) included in the signal equation is subjected to a process (first estimation process) for refining a value roughly obtained, and then using thus refined value of the variable to estimate (second estimation process) other variables (including the signal intensity), the signals are separated.SELECTED DRAWING: Figure 5
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