An accurate detection of the radiation field is crucial to 3D conformal radiotherapy (3D-CRT). Automated techniques to detect the field edges on double exposure portal images have previously focused on thresholding techniques. In this paper, we present a new approach based on a curve propagation technique (the Fast Marching method) which proves to be more effective at detecting the radiation fi...

Vesicoureteric reflux is an important association of paediatric urinary tract infection. Fluoroscopic micturating cystourethrography and radionuclide cystography have been employed for detecting and grading vesicoureteric reflux. However, both modalities involve ionising radiation, which can pose significant radiation risk to growing children. They also have a lower detection rate due to interm...

The objective of this work is to develop systems, models and algorithms that help distinguish signatures of dangerous radiation material from background and other (e.g. medical) sources of radiation. The challenge is to do so rapidly and with an extremely low probability of false alarms. Radiological detection architectures will be deployed in a variety of settings such as monitoring political ...

In this paper, we will review both past and recent progresses in the generation, detection and application of intense terahertz (THz) radiation. We will restrict the review to laser based intense few-cycle THz sources, and thus will not include sources such as synchrotron-based or narrowband sources. We will first review the various methods used for generating intense THz radiation, including p...

The radiation detection systems employed in radioanalytical chemistry laboratories have changed considerably over the past sixty years, with significant improvement realized since the early 1980s. Advancements in the areas of material science, electronics, and computer technology have contributed to the development of more sensitive, reliable, and user-friendly laboratory instruments. The four ...

A virtual counter was developed to count the signals from a scintillation detector. After were processed by some electronic devices, they counted and real counter. The counts obtained both counters accumulated via different amplifier gains source-to-detector distances investigate their effects on recorded counts. results compared with those of one. It concluded that could be used radiation dete...

Radiation susceptibility of electronics has always been about probing electrical properties in either transient or time-accumulated phenomena. As the size and complexity electronic chips systems increase, detection most vulnerable regions becomes more time consuming challenging. In this study, we hypothesize that localized mechanical stress, if overlapping electrically sensitive regions, can ma...

Low dose detection of g radiation remains critical for radiology therapy and nuclear security. We report herein on a novel dual-band fluorescence sensor system based on a molecule, 4-(1H-phenanthro[9,10-d]imidazol-2-yl)-N,N-diphenylaniline (PI-DPA), which can be dissolved into halogenated solvents to enable expedient detection of g radiation. The limit of detection was projected down to 0.006 G...