fixed myocardial defects in both stress and rest images, could be artifactual as a result of soft tissue attenuation. to increase specificity and identify the false positive results, we used gated technique to evaluate the wall motion and wall thickening as an index to differentiate real ischemic lesions from artifactual defects. 93 patients were studied. in 46 patients (48.8%) fixed perfusion ...

Detecting subsurface damages in multi-layer lossy media has been an important topic in the application of GPR (ground penetrating radar) on civil infrastructure systems such as bridges and roadways. In these systems, the presence of subsurface damages including interlayer delaminations, air voids, and material cracking can result in a premature failure of the systems and, thus, must be inspecte...

Abstract The capability of Active Thermography (AT) techniques in detecting shallow defects has been proved by many works the last years, both on metals and composites. However, there are few which these have used adopting simulated more representative real ones. aim this work is to investigate Pulsed spherical metal specimens produced with laser powder bed fusion (L-PBF) process characterized ...

Abstract The growing demand for electronic devices, smart and the Internet of Things constitutes primary driving force marching down path decreased critical dimension increased circuit intricacy integrated circuits. However, as sub-10 nm high-volume manufacturing is becoming mainstream, there greater awareness that defects introduced by original equipment manufacturer components impact yield co...

PURPOSE Design and optimization of medical imaging systems benefit from accurate theoretical modeling that identifies the physical factors governing image quality, particularly in the early stages of system development. This work extends Fourier metrics of imaging performance and detectability index (d') to tomosynthesis and cone-beam CT (CBCT) and investigates the extent to which d' is a valid...

We are developing a photon-counting spectral CT detector with a small pixel size of [Formula: see text] mm(2), offering a potential advantage for better visualization of small structures in pediatric patients. The purpose of this study is to determine the patient size dependent scanning parameters (kVp and mAs) for pediatric CT in two imaging cases: adipose imaging and iodinated blood imaging. ...

FOUNDATIONS ................................................................................................................ 456 Signals and Noise, Detectability and Discriminability ............................................... 456 Noise from Classical Statistical Mechanics ............................................................... 459 Noise from Quantum Mechanics .........................