Does Low B-value can Handle Q-ball and DTI Reconstructions? - Diffusion MRI Experiment of Ex-vivo Pigs Spinal Cord Phantom

Neural coding af chemical informalion is slill under strong debate. II is clear thal, in vertebrales, neural representation in lhe ollaclory bulb is a key for underslanding a pulative odour code. To explore Ihis cade, in this work we have sludied a public dalasel 01 radio images 01 2-Deoxyglucose uptake (2-DG) in lhe olfactory bulb 01 rals in response lo diverse odoranls using univariate pixel seleclion algorithms: rank-products and Mann-Whitney U (MWU) testo Inillal results indicale that some chemical properties 01 odorants preferentially aclivate cerlain areas of the ralollactory bulb. While non-parametric tesl (MWU) has difficulties lo detecl Ihese regions, rank-product provides a higher power of detection. Does Low B-value can Handle Q·ball and DTI Reconslruclions? Diflusion MRI Experiment of Ex-vivo Pigs Spinal Cord Phantom Aleksandra Klimas1 , Kamil Gorczewski2, Przemyslaw Pencak3, Zatia Drzazga1 and Uwe Klose2 1 University of Silesia, Katowice, Poland 2 Unjversity oI Tuebingen, Germany ] Miefeckl University Hospital 01 Silesian Medicai Universi/y, Kalowice, Poland Keywards: Q-ball Reconstruclion, Diffusion Tensor Imaging, Dilfusion Phanlom, Fibre Crossing. Abstract: The direction ofaxons in white maUer can be estimated using a delerministic fibre tracking algorithms and diffusion weighted imaging. The aim of this work was lo evaluate lhe data, obtained Irom pig spines phanlom measuremenls with relatively low b-value, using two types of reconslructions: diffusion tensor imaging (DTI) and q-ball approach. Pigs spines submerged in agar gel were used lo prepare a phantom wilh !wo crossing populations of fibres. The phantoms were measured in 3T MR scanned for b-value of 1000 and 2000 s/mm2 for q-ball and 20Q-2000sJmm2 for DTI reconstruction. Analysis of crossing and single libre population regions in lhe scanners showed lha! lhe median dispersions lrom lhe reference directions in case 01 5ingle fibra populalion were c.a. 4Â O and lor crossing area c.a. 12° and 6.5 0 for b·value 01 1000 s/mm2 and 2000 s/mm2 respectively. The q-ball approach was able 10 resolve crossing problem lor bolh 10'11 b-values. II 'lias shown here lha! coherent results can be achieved even with lower b-values Ihan proposed by lhe theory. The direction ofaxons in white maUer can be estimated using a delerministic fibre tracking algorithms and diffusion weighted imaging. The aim of this work was lo evaluate lhe data, obtained Irom pig spines phanlom measuremenls with relatively low b-value, using two types of reconslructions: diffusion tensor imaging (DTI) and q-ball approach. Pigs spines submerged in agar gel were used lo prepare a phantom wilh !wo crossing populations of fibres. The phantoms were measured in 3T MR scanned for b-value of 1000 and 2000 s/mm2 for q-ball and 20Q-2000sJmm2 for DTI reconstruction. Analysis of crossing and single libre population regions in lhe scanners showed lha! lhe median dispersions lrom lhe reference directions in case 01 5ingle fibra populalion were c.a. 4Â O and lor crossing area c.a. 12° and 6.5 0 for b·value 01 1000 s/mm2 and 2000 s/mm2 respectively. The q-ball approach was able 10 resolve crossing problem lor bolh 10'11 b-values. II 'lias shown here lha! coherent results can be achieved even with lower b-values Ihan proposed by lhe theory. Poster Sesslon 4 10:40 -11:30 HEALTHINF Fayar Evalualion oi a Web·based Menlor Funclional System lor Employment Supporl Training oi Nurses who Have Nol been Employed Yumika Nakamura' , Yukie Majima 2 , Yasuka Maekawa2 , Kaori Fukayama' and Kazumi Hashi 1 1 Osaka Prelecture University. Habikino Osaka, Japan 2 Osaka Prelecture University. Sakai Osaka, Japan