Prospective motion correction using coil-mounted cameras: Cross-calibration considerations.

ABSTRACT:

Purpose

Optical prospective motion correction substantially reduces sensitivity to motion in neuroimaging of human subjects. However, a major barrier to clinical deployment has been the time-consuming cross-calibration between the camera and MRI scanner reference frames. This work addresses this challenge.

Methods

A single camera was mounted onto the head coil for tracking head motion. Two new methods were developed: (1) a rapid calibration method for camera-to-scanner cross-calibration using a custom-made tool incorporating wireless active markers, and (2) a calibration adjustment method to compensate for table motion between scans. Both methods were tested at 1.5T and 3T in vivo. Simulations were performed to determine the required mechanical tolerance for repositioning of

SUBMITTER: Maclaren J 

PROVIDER: S-EPMC5899426 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature