Combined PET/CT scanners now play a major role in medicine for in vivo imaging in oncology, cardiology, neurology, and psychiatry. As the performance of a scanner depends not only on the scintillating material but also on the scanner design, with regards to the advent of newer scanners, there is a need to optimize acquisition protocols as well as to compare scanner performances on an objective ...

This work presents an alternative for using a laser scanner to perform tasks like the relative positioning of two mobile robots, allowing obtaining a final formation. It is presented a strategy for the localization of the leader robot of the formation through the information got by the laser scanner, which is mounted in the follower robot. The paper includes an analysis of the stability of the ...

This paper describes the design and implementation of a passive scanner for Modbus networks. The tool integrates packet parsing and passive scanning functionality to interpret Modbus transactions and provide accurate network representations. In particular, the scanner monitors Modbus messages to maintain and update state table entries associated with field devices. Entries in the state tables r...

Due to noise emission of the MR scanner during functional imaging it is impossible to evaluate subjects' performance on speech production tasks online. Therefore we choose a pre-evaluation paradigm to extract the relevant phonetic parameters that characterize subjects' utterances. All experimental tasks were first recorded in an anechoic chamber before subjects passed on to the fMRI session. Al...

UNLABELLED The microPET Focus 120 scanner is a third-generation animal PET scanner dedicated to rodent imaging. Here, we report the results of scanner performance testing. METHODS A (68)Ge point source was used to measure energy resolution, which was determined for each crystal and averaged. Spatial resolution was measured using a (22)Na point source with a nominal size of 0.25 mm at the syst...

Obtaining three-dimensional geometrical data of vascular systems is of major importance to a number of research areas in medicine and biology. Examples are the characterization of tumor vasculature, modeling blood flow, or genetic effects on vascular development. The performance of the General Electric Medical Systems MS8 microCT scanner is examined in the context of these applications. The sys...

A prototype time-of-flight (TOF) PET scanner based on cerium-doped lanthanum bromide [LaBr(3) (5% Ce)] has been developed. LaBr(3) has a high light output, excellent energy resolution and fast timing properties that have been predicted to lead to good image quality. Intrinsic performance measurements of spatial resolution, sensitivity and scatter fraction demonstrate good conventional PET perfo...

METHODS This study characterizes the performance of a newly developed whole-body PET scanner (Advance, General Electric Medical Systems, Milwaukee, WI). The scanner consists of 12,096 bismuth germinate crystals (4.0 mm transaxial by 8.1 mm axial by 30 mm radial) in 18 rings, giving 35 two-dimensional image planes through an axial field of view of 15.2 cm. The rings are separated by retractable ...

UNLABELLED Results of performance measurements for a lutetium oxyorthosilicate (LSO)-based PET/CT scanner using new National Electrical Manufacturers Association (NEMA) NU 2-2001 standards are reported. METHODS Performance measurements following the NU 2-2001 standards were performed on an LSO-based PET/CT scanner. In addition, issues associated with the application of the NEMA standard to LS...

Introduction The microarray scanner plays a pivotal role in the DNA microarray processing workflow and can profoundly affect the quality and reliability of microarray data. Since important decisions are often based on microarray scanning results, it is critical to understand the magnitude of the error contribution of each step in the microarray processing workflow compared to the total error of...