BEGIN:VCALENDAR METHOD:REQUEST PRODID:Microsoft Exchange Server 2010 VERSION:2.0 BEGIN:VTIMEZONE TZID:Eastern Standard Time BEGIN:STANDARD DTSTART:16010101T020000 TZOFFSETFROM:-0400 TZOFFSETTO:-0500 RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=1SU;BYMONTH=11 END:STANDARD BEGIN:DAYLIGHT DTSTART:16010101T020000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=2SU;BYMONTH=3 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT ORGANIZER;CN=Michael McDonald:mailto:michael.mcdonald@fsu.edu DESCRIPTION;LANGUAGE=en-US:"Redistilling GRAPPA: A Bipartite Graph Formulat ion for Parallel MRI Reconstruction"\n\nZlatko Sokolikj\n\nPlease feel fre e to forward/share this invitation with other groups/disciplines that migh t be interested in this talk/topic. All are welcome to attend.\n\nNOTE: In -person attendance is requested in our 499 Dirac Science Library (DSL) Sem inar Room. Zoom access is intended for external (non-departmental) partici pants only.\n\nhttps://fsu.zoom.us/j/94273595552\nMeeting # 942 7359 5552\ n\n\nWednesday\, Sep 30\, 2026\, Schedule:\n\n *\n3:00 to 3:30 PM Eastern Time (US and Canada)\n *\n☕ Nespresso & Teatime - 417 DSL Commons\n \n *\n3:30 to 4:30 PM Eastern Time (US and Canada)\n *\n🕟 Colloqui um - 499 DSL Seminar Room\n\n\nAbstract:\nMagnetic resonance imaging (MRI) produces high-resolution images of soft tissue without ionizing radiation \, but acquisition remains relatively slow because the scanner must sample raw spatial-frequency data\, known as k-space\, before reconstructing the final image. Parallel MRI accelerates this process by using multiple rece iver coils to recover information from undersampled data. GRAPPA is a wide ly used k-space parallel imaging method that estimates missing samples thr ough interpolation weights learned from a fully sampled autocalibration si gnal (ACS) region.\n\nThis talk presents Bipartite-Graph GRAPPA (BG-GRAPPA )\, a graph-based view of GRAPPA reconstruction in which acquired multicoi l k-space samples are represented as source nodes\, missing samples are re presented as target nodes\, and calibrated interpolation weights form the edges between them. This reformulation preserves the scan-specific calibra tion structure of classical GRAPPA while making its source-to-target conne ctivity explicit.\n\nUsing this graph view\, the talk examines how reconst ruction behavior changes across anatomy\, acceleration\, coil relationship s\, target classes\, and spatial location in k-space. The results show tha t reconstruction difficulty is not uniform: performance varies across k-sp ace\, and improvements in magnitude image quality do not always correspond to improved complex k-space agreement. By making GRAPPA’s interpolation structure visible\, BG-GRAPPA provides a framework for analyzing which co nnections matter\, where calibration transfers reliably\, and how more ada ptive reconstruction strategies may be designed.\n\nAdditional colloquium details can be found here:\nhttps://www.sc.fsu.edu/news-and-events/colloqu ium/colloquium-with-zlatko-sokolikj-2026-09-30\n\n🎦 Colloquium recordings will be mad e available here: https://www.sc.fsu.edu/colloquium\n UID:040000008200E00074C5B7101A82E00800000000A442CCB5DB4DDD01000000000000000 0100000001697688C577F1A4CA5BAE9A75603D29C SUMMARY;LANGUAGE=en-US:Scientific Computing Colloquium with Zlatko Sokolikj DTSTART;TZID=Eastern Standard Time:20260930T153000 DTEND;TZID=Eastern Standard Time:20260930T162500 CLASS:PUBLIC PRIORITY:5 DTSTAMP:20260926T172314Z TRANSP:OPAQUE STATUS:CONFIRMED SEQUENCE:1 LOCATION;LANGUAGE=en-US:https://fsu.zoom.us/j/94273595552 X-MICROSOFT-CDO-APPT-SEQUENCE:1 X-MICROSOFT-CDO-OWNERAPPTID:2125059317 X-MICROSOFT-CDO-BUSYSTATUS:TENTATIVE X-MICROSOFT-CDO-INTENDEDSTATUS:BUSY X-MICROSOFT-CDO-ALLDAYEVENT:FALSE X-MICROSOFT-CDO-IMPORTANCE:1 X-MICROSOFT-CDO-INSTTYPE:0 X-MICROSOFT-DONOTFORWARDMEETING:FALSE X-MICROSOFT-DISALLOW-COUNTER:FALSE X-MICROSOFT-REQUESTEDATTENDANCEMODE:DEFAULT X-MICROSOFT-ISRESPONSEREQUESTED:FALSE X-MICROSOFT-LOCATIONDISPLAYNAME:https://fsu.zoom.us/j/94273595552 X-MICROSOFT-LOCATIONSOURCE:None X-MICROSOFT-LOCATIONS:[{"DisplayName":"https://fsu.zoom.us/j/94273595552"\, "LocationAnnotation":""\,"LocationUri":""\,"LocationStreet":""\,"LocationC ity":""\,"LocationState":""\,"LocationCountry":""\,"LocationPostalCode":"" \,"LocationFullAddress":""}] BEGIN:VALARM DESCRIPTION:REMINDER TRIGGER;RELATED=START:-PT5M ACTION:DISPLAY END:VALARM END:VEVENT END:VCALENDAR