This finding was consistent with the previous evaluation of ROI-based lp-ntPET [Normandin et al., 2012].
In this study the evaluation of the ROIs was performed with the open-source image analysis tool ImageJ (Fiji).
Perhaps one of the most popular measures for project evaluation is the ROI: ROI = Revenue R − Cost C Investment I. Open image in new window.
Both objective and subjective evaluations of extracted ROIs indicated that the proposed SVA model based on ROI extraction scheme outperforms the schemes only using spatial or/and temporal visual attention clues.
Subjective evaluation of SVA-based ROIs extraction results has also been performed.
Evaluation of the control ROIs placed at the distal cortical surfaces showed that ADC change in un-sonicated regions was comparable with the LoA in each case.
For evaluation of BM distribution, the ROI was defined to include the cervical, thoracic, and lumbar vertebrae from the CT images, and this ROI was copied and applied to the PET images.
For evaluation of CNR, the reference ROI was placed over the adjacent muscle in the neck.
These parameters are calculated by evaluation of various regions of interest (ROIs) in the transverse image slice that contains the centers of the spheres, as well as in adjacent slices (Fig. 3), as defined by the NEMA standard.
Repeat injection with placement of ROI in true lumen resulted in adequate evaluation of dissection.
The specific focus of this study was to determine the effect of ROI size and positioning on tumor ADC evaluation and not to assess the relation between ADC and response, as various previous authors have done [ 16– 24].
