gamma camera is an important apparatus in nuclear medicine imaging. its detection part is consists of a scintillation detector with aheavy collimator. substitution of semiconductor detectors instead of scintillator in these cameras has been effectively studied. in this study, it is aimed to introduce a new design of p-n semiconductor detector array for nuclear medicine imaging. a p-n semiconduc...

case presentation a preterm neonate with suspicious rt renal mass and oligohydramnios at prenatal ultrasound was hospitalized due to respiratory distress and hypertension. although postnatal ultrasound showed enlarged echogenic rt kidney and normal sized echogenic lt kidney, regarding to linear array transducer findings, arpkd was considered rather than renal mass. the diagnosis was confirmed a...

Photoacoustic imaging (PAI) is a promising medical imaging modality which provides the resolution of Ultrasound (US) and the contrast of Optical imaging modalities. One of the most important challenges in PAI is image formation, especially in the case that a linear-array US transducer is used for data acquisition. This is due to the fact that in the linear-array scenario, there is only 60 degre...

The delay-and-sum (DAS) algorithm is widely used for beamforming in linear array photoacoustic (PA) imaging systems and characterized by fast execution. However, these algorithms suffer from various drawbacks, such as low resolution, contrast, high sidelobe artifacts, lack of visual coherence. More recently, adaptive weighting was introduced to improve the reconstruction image quality. Unfortun...

uniform linear array (ula)-based tapped-delay line (tdl) structure has good performance metrics when the signal sources are located at the middle angles. it offers poor performance when the signal sources are close to the array endfire. in this paper, a new approach is proposed which offers higher performance and desired beamforming on tdl structure when the wideband uncorrelated radio sources ...