Usefulness of a new anthropomorphic phantom simulating the chest and abdomen regions in PET tests.

Objective: To investigate the clinical utility of a new anthropomorphic phantom that reproduces the chest and abdomen better than the conventional National Electrical Manufacturers Association (NEMA) body phantom, count rates and image quality of PET images obtained from patients were evaluated.

Methods: Anthropomorphic phantoms were used to include radioactivity in the lung, liver, kidney, and background regions. Two NEMA body phantoms were used for chest and abdominal assessments.

[A Comparative Study of the Compressed SENSE Accelerated Fat-suppressed 3D-turbo Spin Echo Sequence Method and Conventional Fat-suppressed 3D-TSE Method for Lingual Neurovascular Bundle Visualization].

Purpose: This study aimed to compare the compressed SENSE (C-SENSE) accelerated fat-suppressed 3D-turbo spin echo (TSE) method and the conventional SENSE accelerated fat-suppressed 3D-TSE method to examine the usefulness of C-SENSE technology in reducing imaging time.

Methods: Fat-suppressed 3D-TSE using either C-SENSE or SENSE technology was utilized to capture consecutive preoperative images of 34 patients with tongue cancer. SNR, CNR, and visual evaluation were then used to compare both types of technology.

Algorithm development for low level radioxenon 2D spectra analysis: A first case of study using spectral unmixing for a β-γ detector.

In the scope of the verification regime of the Comprehensive nuclear Test Ban Treaty, the CEA/DAM is developing new β-γ measurement systems. In order to improve the analysis methods at low statistics, a new multiplicative spectral unmixing algorithm for full-spectrum analysis was tested on a particular setup for different types of mixtures. The reconstructed activities for simulated spectra and the characteristic limits found with this algorithm are compared to the classic ROI analysis method.

A new simpler image quality index based on body size for FDG-PET/CT.

Noise equivalent count density (NEC density ) is often used to evaluate the image quality of whole-body fluorodeoxyglucose tomography tests. However, this index is calculated using the patient volume, which is difficult to obtain at every facility. In this study, we proposed new image quality indices that can be evaluated at all facilities.