Additional sampling directions improve detection range of wireless radiofrequency probes.

ABSTRACT:

Purpose

While MRI is enhancing our knowledge about the structure and function of the human brain, subject motion remains a problem in many clinical applications. Recently, the use of wireless radiofrequency markers with three one-dimensional (1D) navigators for prospective correction was demonstrated. This method is restricted in the range of motion that can be corrected, however, because of limited information in the 1D readouts.

Methods

Here, the limitation of techniques for disambiguating marker locations was investigated. It was shown that including more sampling directions extends the tracking range for head rotations. The efficiency of trading readout resolution for speed was explored.

Results

Tracking of head rotations was demonstrated from -19.2 to 34.4°, -2.7

SUBMITTER: Hoffmann M 

PROVIDER: S-EPMC5025722 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature