BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:The Significance of a Protocol in X-ray Radiography: Influential P
 arameters
DTSTART;VALUE=DATE-TIME:20210913T100000Z
DTEND;VALUE=DATE-TIME:20210913T103000Z
DTSTAMP;VALUE=DATE-TIME:20260714T134602Z
UID:indico-contribution-277-1562@indico.tlabs.ac.za
DESCRIPTION:Speakers: Nhlakanipho Mdziniso (University of Eswatini\, Depar
 tment of Physics)\n**Background Information and Aims**: X-ray imaging is o
 ne of the classical human health diagnostic procedures. The aim of this wo
 rk was to explore and analyze the X-ray exposure parameters and their sign
 ificance in a given protocol in relation to image quality. \n**Materials a
 nd Methods**: Exposures were delivered on meaty cow ribs\, which served as
  a human equivalent phantom with tissue heterogeneities. Six different pro
 tocols corresponding to the foot\, wrist\, ankle\, forearm\, chest\, and h
 and were used in exposing the phantom with a Shimadzu RAD speed MC unit. T
 he resultant images were analyzed with Image J software for relative inten
 sities so as to index image quality per protocol.\n**Results and Discussio
 ns**: There were variations in the relative intensities read at selected i
 mage pixels protocol by protocol. This showed that the relative intensitie
 s can be used to make predictions of image quality and associated dose.\n*
 *Conclusions**: It is crucial to use the appropriate protocol for any give
 n X-ray imaging procedure to minimize the dose delivered to tissue without
  compromising image quality. Relative intensity and thus optical density c
 an be used as a measure of image quality and radiation dose by protocol.\n
 \nhttps://indico.tlabs.ac.za/event/92/contributions/1562/
LOCATION:Zoom Online
URL:https://indico.tlabs.ac.za/event/92/contributions/1562/
END:VEVENT
BEGIN:VEVENT
SUMMARY:The central role of metrology in applied nuclear physics research
DTSTART;VALUE=DATE-TIME:20210913T120000Z
DTEND;VALUE=DATE-TIME:20210913T123000Z
DTSTAMP;VALUE=DATE-TIME:20260714T134602Z
UID:indico-contribution-277-1596@indico.tlabs.ac.za
DESCRIPTION:Speakers: Andy Buffler (UCT)\nThe art and act of measurement l
 ie at the very heart of the enterprise of Science. Measurement mediates be
 tween the complexity of the real universe in which we live and the idealis
 ed order of physical theory. Careful observation of nature thus plays a po
 werful role in the creation of all scientific knowledge\, and the subseque
 nt development of technologies. Unambiguous understanding of the quality o
 f data from experiment\, whether from the detectors located within the cav
 erns of the Large Hadron Collider at CERN\, or from a handheld radiation c
 ounter\, is critical for the effective use of the data. I will argue why r
 adiation metrology is a critical component of all applied nuclear physics 
 research and make the case for measurement to be placed at the forefront o
 f our laboratory-based teaching programmes.\n\nhttps://indico.tlabs.ac.za/
 event/92/contributions/1596/
LOCATION:https://zoom.us/j/99350296428?pwd=a2dkZWczTXJXZkZmTXZNWFlOSzc5dz0
 9
URL:https://indico.tlabs.ac.za/event/92/contributions/1596/
END:VEVENT
BEGIN:VEVENT
SUMMARY:F-18 activity mesurements at NMISA
DTSTART;VALUE=DATE-TIME:20210913T080000Z
DTEND;VALUE=DATE-TIME:20210913T083000Z
DTSTAMP;VALUE=DATE-TIME:20260714T134602Z
UID:indico-contribution-277-1563@indico.tlabs.ac.za
DESCRIPTION:Speakers: Milton van Rooy (NMISA)\, Martin van Staden (NMISA)\
 , Joline Lubbe (NMISA)\, Bruce Simpson (NMISA)\nF-18 is an important radio
 nuclide in PET imaging and is produced at iThemba LABS. Therefore\, iThemb
 a LABS and other producers and users of F-18 require traceability from a m
 etrology institute. At NMISA the absolute activity of F-18 was determined 
 through a primary measurement using 4πβ-γ liquid scintillation coincide
 nce counting. Conventional beta-efficiency extrapolation was employed. Sub
 sequently\, a factor for the NMISA ionization chamber was determined and u
 sed during a SIRTI comparison. A non-extrapolation method based on a detec
 tion efficiency analysis was also employed to analyse the data\, using an 
 adaptation of the double-phototube coincidence efficiency for a threshold 
 above the second monopeak. Results and uncertainty budgets for the two met
 hods are presented and discussed. Dissemination of F-18 traceability to iT
 hemba LABS is also presented.\n\nhttps://indico.tlabs.ac.za/event/92/contr
 ibutions/1563/
LOCATION:Zoom
URL:https://indico.tlabs.ac.za/event/92/contributions/1563/
END:VEVENT
END:VCALENDAR