TU Ilmenau Citizen campus: 126 years of X-ray tubes - physical limits, clinical demands, technical solutions

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Fr. 05.11.2021
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Due to the change in regulations for the containment of the Corona pandemic, the 3G+ rules apply to the event


Topic:         126 years of X-ray tubes - physical limits, clinical demands, technical solutions

Time:          Friday, 05.11.2021, 3.00 p.m.

Place:         TU Ilmenau, Faradaybau, Faraday Lecture Hall, Weimarer Str. 32

Speaker:     Prof. Dr. Andreas Keller, expert for radiation biology and medical radiation physics, visiting scientist at TU Ilmenau


Due to the limited number of seats, pre-registration is mandatory:



November 2021 marks the 126th anniversary of the discovery of X-rays. Since then, X-ray machines have been producing an image of the otherwise invisible interior of the body that is visible to the human eye. Which imaging parameters are optimal for this depends on the diagnostic task: Should the skeleton be depicted? Should organs be visible? Are the organs moving? How thick is the radiated part of the patient's body? Depending on different interactions of the X-rays with the irradiated human body tissue and with the so-called image converter, the parameters of the useful beam are different.

In his lecture at the TU Ilmenau Citizens Campus (previously Senior Citizens Academy), Prof. Andreas Keller, expert in radiation biology and medical radiation physics at the TU Ilmenau, recalls the discovery of X-rays no less than 126 years ago. Since then, X-ray tubes have been generating a radiation field for medical diagnostics. The first ion tubes had narrow limits that were detrimental to medical work. Prof. Keller explains how two major leaps in technical development then made it possible to meet today's high demands: Electron tubes with glowing cathode allowed for the first time a separate setting of high voltage and current. And radiation-cooled high-temperature rotary anode tubes made short recording times possible. Above all, Keller classifies this development in medical technology as a decisive engineering achievement.


Admission: 5 euros



Dr. Uwe Geishendorf

Central Institute for Education
03677 69-4675