The magic of math: three-dimensional X-ray vision
Time and place: Wednesday, April 17 at 16:15, over Zoom and in colloquium watch events at mathematics departments (see bottom of the page)
Speaker: Samuli Siltanen, University of Helsinki
Chaired by: Mikko Salo, University of Jyväskylä
Title: The magic of math: three-dimensional X-ray vision
Abstract:
In the 1970’s, a new X-ray based innovation was introduced. Tomography, or slice imaging, revealed the inner structure of a patient point by point as a three-dimensional map of tissues. This opened up a new world for doctors as they could do precise diagnosing based on these "CAT-scans."
Tomography is based on recording X-ray images of the patient along many directions, and then using mathematics in a clever way for combining the information into a 3D image. This talk explains that process in simple terms. An important research topic in modern mathematics is to look for a way to do tomographic imaging with the least possible amount of radiation dose to the patient. Or to compensate for incomplete measurements caused by restrictions in the imaging arrangement. This is based on a process called regularisation, also illustrated in the talk in an easy-to-understand way.
Also: there is a fun quiz revealing natural tomographers among the audience.
Where to watch?
The colloquium will be broadcast over Zoom on Wednesday, April 17, at 16:15. The Zoom link is:
https://helsinki.zoom.us/j/63127847112?pwd=ZWV0dlRZbm9DYVZxNVR5b21UZG5tdz09
Meeting ID: 631 2784 7112
Passcode: SMY24
In addition there will be colloquium watch events at most Finnish universities' mathematics departments. See the list below for the location of your own department's event:
- Aalto University: Hall M1 (Otakaari 1)
- LUT University: Hall 1318 (Lappeenranta campus, third floor atrium)
- University of Eastern Finland: Metria M301 (Joensuu campus)
- University of Helsinki: Exactum A111 (Lars Ahlfors auditorium)
- University of Jyväskylä: MaD302
- University of Oulu: Lecture hall L9 (Linnanmaa campus)
- University of Turku: Quantum M3
- University of Vaasa: F425
- Åbo Akademi: Aurum A316 Chromium
A recording of the talk will be made available on FMS' YouTube channel.