How to take a perfect image with DINGO

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dc.contributor.authorGrigorova, Ven_AU
dc.contributor.authorClark, SMen_AU
dc.contributor.authorBevitt, JJen_AU
dc.date.accessioned2023-08-04T03:32:48Zen_AU
dc.date.available2023-08-04T03:32:48Zen_AU
dc.date.issued2021-11-24en_AU
dc.date.statistics2023-04-21en_AU
dc.description.abstractNeutron tomography is a powerful non-destructive technique used to study the internal structure of opaque objects. Neutron images are obtained by exposing an object to a uniform neutron beam. The transmitted neutrons interact with a phosphor which converts from neutrons to visible light, which is then demagnified on to a CCD camera. The modulation transfer function (MTF) is routinely used to determine the sharpness of an image, i.e. the ability of the imaging system to transfer information from an object to an image. The spatial frequency (SF) is the rate of transition between light and dark features in the image. For a perfect system where all of the frequency information is passed from object to image equally, the MTF of the will be 1 or 100% for all spatial frequencies and all features and contrast in the object will be transferred to the image. We performed a series of measurements to optimise the time necessary to obtain high-resolution radiographs with the DINGO instrument. We determined the MTF over a range of experimental conditions to understand the various contributions of DINGO’s imaging system variables to radiograph resolution. The system components varied in this study are the two beam modes, different scintillator screens, and pixel resolution of different cameras and lenses. We also compared the different exposure times of the object to the neutron beam to try to understand the minimum exposure time that will generate good resolution radiographs. Details of the use of this method for determining the quality of a neutron tomographic imaging system will be presented and the MTF data will be used to determine the optimal operating arrangement. © 2021 The Authorsen_AU
dc.identifier.articlenumber206en_AU
dc.identifier.citationGrigorova, V., Clark, S., & Bevitt, J. (2021). How to take a perfect image with DINGO. Presentation to the ANSTO User Meeting, Online, 24-26 November 2021. Retrieved from: https://events01.synchrotron.org.au/event/146/contributions/4311/contribution.pdfen_AU
dc.identifier.conferenceenddate2021-11-26en_AU
dc.identifier.conferencenameANSTO User Meeting 2021en_AU
dc.identifier.conferenceplaceOnlineen_AU
dc.identifier.conferencestartdate2021-11-24en_AU
dc.identifier.urihttps://events01.synchrotron.org.au/event/146/contributions/4311/contribution.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15085en_AU
dc.language.isoenen_AU
dc.publisherAustralian Nuclear Science and Technology Organisationen_AU
dc.relation.urihttps://events01.synchrotron.org.au/event/146/contributions/4311/contribution.pdfen_AU
dc.subjectTomographyen_AU
dc.subjectImagesen_AU
dc.subjectNeutronsen_AU
dc.subjectBeamsen_AU
dc.subjectCamerasen_AU
dc.subjectNeutron camerasen_AU
dc.subjectANSTOen_AU
dc.subjectMeasuring instrumentsen_AU
dc.titleHow to take a perfect image with DINGOen_AU
dc.typeConference Presentationen_AU
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