Frida Johansson1,2, Helena Brisby2,3, Hanna Hebelka2,4, Maria Ljungberg1,2, and Kerstin Lagerstrand1,2
1Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden, 2Institute of Clinical Sciences, Gothenburg University, Gothenburg, Sweden, 3Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden, 4Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden
1Medical Physics and Biomedical Engineering, Sahlgrenska University Hospital, Gothenburg, Sweden, 2Institute of Clinical Sciences, Gothenburg University, Gothenburg, Sweden, 3Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden, 4Department of Radiology, Sahlgrenska University Hospital, Gothenburg, Sweden
The study shows that respiratory motion affects the disc phase signal and
should be taken into consideration when evaluating the disc using MRS. The proposed method improved the quality of the MRS-spectrum and
showed feasibility in measuring the molecular disc content during normal breathing.
Figure 3. Example of spectra without processing
(upper) and with the proposed method (lower) where the black line is the
modelled peaks. It appears to be less noise with the proposed method.
Figure 1. Positioning
of the volume of interest (red box and the yellow box is the shifted water
volume) inside the disc and the four saturation slabs around the disc. Sagittal
(left), coronal (middle) and axial (right).