Researchers used powerful XFELs to trigger strong inner-shell lasing, producing attosecond hard X-ray pulses. Filamentation ...

For certain medical conditions, X-ray or ultrasound images don’t provide enough ... Still, every CT scan exposes you to a certain level of radiation, and a CT scan with contrast may produce ...

Brain death determination sits at the fraught intersection of critical-care medicine, ethics, and organ-donation logistics. Missteps risk either prolonging mechanical support with no prospect of ...