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SUMMARY:A photon counting detector for x-ray imaging: advantages and chall
 enges
DTSTART;VALUE=DATE-TIME:20211125T074300Z
DTEND;VALUE=DATE-TIME:20211125T074400Z
DTSTAMP;VALUE=DATE-TIME:20260718T061541Z
UID:indico-contribution-4353@events01.synchrotron.org.au
DESCRIPTION:Speakers: Chris Hall (Australian Synchrotron)\nX-ray sensitive
  area detectors comprised of arrays of photon counting elements have been 
 under development for decades. The difficult and expensive technological d
 evelopment of integrating readout electronic chips with a converter has be
 en substantially supported by areas of science other than synchrotron radi
 ation research. For instance\, such innovation is vital in large scale hig
 h energy physics detectors. Synchrotron radiation research has benefited f
 rom this technology being spun-out into the market.\nIMBL has purchased a 
 photon counting array detector: the Eiger2\, from the Swiss company Dectri
 s. It will be used in our human radiography programme. An NHMRC grant was 
 awarded to pursue the use of computed tomography in mammography (breast im
 aging) using the IMBL. Funds were provided for a 3 mega-pixel array detect
 or\, with 75 micron pitch pixels. Similar devices have been used in SR x-r
 ay scattering stations for a sometime\, but have not yet found extensive u
 se in radiography. The exquisite sensitivity is a great advantage for imag
 ing live subjects\; keeping the required dose to a minimum. However they d
 o have field coverage limitations. These are being addressing as part of t
 he human imaging project. In all photon counting detectors currently on th
 e market\, the active area is not continuous. The boundaries between IC ch
 ips\, and multi-chip modules create gaps. For diffraction these missing pi
 xels may be less important\, since reflections are often duplicated\, or r
 adial integration reduces their effect. In imaging however\, every pixel c
 arries potentially important clinical information.\nSome initial data from
  the IMBL Eiger2 is presented\, along with ideas for ameliorating the effe
 ct of the missing pixels on the radiological information.\n\nhttps://event
 s01.synchrotron.org.au/event/146/contributions/4353/
LOCATION:Online
URL:https://events01.synchrotron.org.au/event/146/contributions/4353/
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