Introduction: Accurate film dosimetry requires careful consideration of sources of uncertainty. Some of the sources of uncertainty are dependent on the size and location of region of interest (ROI), especially in small fields. Avoiding the penumbra is often a reason for using a small ROI. In contrast, choosing very small ROIs may increase uncertainty due to the reduction of th...

Objective(s): The partial volume effect (PVE) of single-photon emission computed tomography (SPECT) on corpus striatum imaging is caused by the underestimation of specific binding ratio (SBR). A large ROI (region of interest) set using the Southampton method is independent of PVE for SBR. The present study aimed to determine the optimal ROI size with contrast and SBR for striatum images and val...

Table 1. Nstd/mod is the sum of supra-threshold voxels (p<0.001 unc., clustersize 5) for different ROIs (see legend below) found in the standard and the modified EPI datasets for the contrasts rewardpunishment, reward-baseline and punishment-baseline. Zstd/mod specifies the maximal Z-score. ROI 1: Insula, ROI 2: Amygdalae, ROI 3: Putamen, ROI 4: Thalamus, ROI 5: Caudate, ROI 6: Parahippocampal ...

Natural Language processing (NLP) is a field that combines linguistics, cognitive science, statistical machine learning and other computer science areas in order to compile intelligent computer systems that can understand human languages. NLP has various applications, among which are machine translation, question answering and search engines. The field of NLP has, in the past two decades, come ...

In telemedicine while transferring medical images tampers may be introduced. Before making any diagnostic decisions, the integrity of region of interest (ROI) of the received medical image must be verified to avoid misdiagnosis. In this paper, we propose a novel fragile block based medical image watermarking technique to avoid embedding distortion inside ROI, verify integrity of ROI, detect acc...