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Simultaneous registration and activa...
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Orchard, Jeffrey John.
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Simultaneous registration and activation detection: Overcoming activation-induced registration errors in functional MRI.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Simultaneous registration and activation detection: Overcoming activation-induced registration errors in functional MRI./
作者:
Orchard, Jeffrey John.
面頁冊數:
136 p.
附註:
Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3910.
Contained By:
Dissertation Abstracts International64-08B.
標題:
Computer Science. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ81604
ISBN:
0612816044
Simultaneous registration and activation detection: Overcoming activation-induced registration errors in functional MRI.
Orchard, Jeffrey John.
Simultaneous registration and activation detection: Overcoming activation-induced registration errors in functional MRI.
- 136 p.
Source: Dissertation Abstracts International, Volume: 64-08, Section: B, page: 3910.
Thesis (Ph.D.)--Simon Fraser University (Canada), 2003.
In the processing of functional magnetic resonance imaging (fMRI) data, motion correction is typically performed before activation detection. However, on high-field MR scanners (3 T and higher), the strength of the blood oxygen level dependent (BOLD) signal can cause registration algorithms to produce motion estimates that have stimulus-correlated errors. Motion compensation using these biased motion estimates can result in both false-positive and false-negative regions of activation.
ISBN: 0612816044Subjects--Topical Terms:
626642
Computer Science.
Simultaneous registration and activation detection: Overcoming activation-induced registration errors in functional MRI.
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In the processing of functional magnetic resonance imaging (fMRI) data, motion correction is typically performed before activation detection. However, on high-field MR scanners (3 T and higher), the strength of the blood oxygen level dependent (BOLD) signal can cause registration algorithms to produce motion estimates that have stimulus-correlated errors. Motion compensation using these biased motion estimates can result in both false-positive and false-negative regions of activation.
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By formulating the registration and activation detection problems into a single least-squares problem, both the motion estimates and activation map can be solved for simultaneously. However, the solution is not unique and an additional constraint is used to find a solution that is appropriate. This constrained optimization problem can be solved efficiently, and two equivalent methods are proposed and demonstrated on both simulated and in vivo datasets.
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