BEATS: BEAmline for synchrotron X-ray microTomography at SESAME.

The ID10 beamline of the SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East) synchrotron light source in Jordan was inaugurated in June 2023 and is now open to scientific users. The beamline, which was designed and installed within the European Horizon 2020 project BEAmline for Tomography at SESAME (BEATS), provides full-field X-ray radiography and microtomography imaging with monochromatic or polychromatic X-rays up to photon energies of 100 keV. The photon source generated by a 2.9 T wavelength shifter with variable gap, and a double-multilayer monochromator system allow versatile application for experiments requiring either an X-ray beam with high intensity and flux, and/or a partially spatial coherent beam for phase-contrast applications. Sample manipulation and X-ray detection systems are designed to allow scanning samples with different size, weight and material, providing image voxel sizes from 13 µm down to 0.33 µm. A state-of-the-art computing infrastructure for data collection, three-dimensional (3D) image reconstruction and data analysis allows the visualization and exploration of results online within a few seconds from the completion of a scan. Insights from 3D X-ray imaging are key to the investigation of specimens from archaeology and cultural heritage, biology and health sciences, materials science and engineering, earth, environmental sciences and more. Microtomography scans and preliminary results obtained at the beamline demonstrate that the new beamline ID10-BEATS expands significantly the range of scientific applications that can be targeted at SESAME.

X-ray lens figure errors retrieved by deep learning from several beam intensity images.

The phase problem in the context of focusing synchrotron beams with X-ray lenses is addressed. The feasibility of retrieving the surface error of a lens system by using only the intensity of the propagated beam at several distances is demonstrated. A neural network, trained with a few thousand simulations using random errors, can predict accurately the lens error profile that accounts for all aberrations. It demonstrates the feasibility of routinely measuring the aberrations induced by an X-ray lens, or another optical system, using only a few intensity images.

Prevalencia de el antígeno de la hepatitis B (HbSAg) en mujeres embarazadas que acuden al Hospital Dr. Simón Striddels de Azua / Prevalence of hepatitis B (HbSAg) antigen in gravid women that attend to Dr. Simon Striddels Hospital in Azua

Antecedentes: Tenemos pocas estadísticas acerca de la prevalencia de el antígeno de superficie la Hepatitis B (HbSAg) en mujeres embarazadas en nuestro país. Materiales y métodos: Realizamos un estudio prospectivo, donde se estudiaron 50 embarazadas en trabajo de parto en el Hospital Dr. Simon Striddels en Azua, R.D., durante los meses de julio y agosto 1995. Resultados: Encontramos 4 casos de pacientes portadoras del antígeno de la Hepatitis B para un 8// y un recién nacido afectado (2//). Una de las portadoras tenía antecedentes personales de padecer clinicamente hepatitis. Tres de ellas vivían en la zona rural y habían tenido de 1 a 3 hijos. Comentario: el objetivo en la detención de la Hepatitis B, en mujeres embarazadas, es asegurar que estas lleven a cabo un control prenatal riguroso. Esta determinación tiene un gran valor en la prevención de trastornos que puedan perjudicar la salud de la madre y del niño