Medical ultrasound apparatus; ultrasonic medical diagnostic apparatus; X-ray apparatus for medical purposes; X-ray tubes for medical purposes; MRI diagnostic apparatus for medical purposes; medical devices for dosimetry purposes in the field of radiotherapy; radiological apparatus for medical purposes; medical CT scanners; tomographs for medical purposes; Medical apparatus and instruments, namely, digital radiography machines, ultrasound machines, medical imaging transducers and computed tomography (CT) apparatus