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001-es BibID:	BIBFORM015780
Első szerző:	Trón Lajos (biofizikus)
Cím:	The Mini-PET project in Debrecen / L. Trón, M. Emri, G. Opposits, S. A. Kis, L. Ács, L. Balkay, J. Imrek, D. Novák, Gy. Hegyesi, I. Valastyán, I. Bagaméry, J. Molnár
Dátum:	2009
Megjegyzések:	Elektronikus Osztály, MTA - Atommagkutató Intézet Background: The examination of small animals using high resolution in vivo imag- ing methods is a crucial tool in pharmaceutical research projects. Too suffice this demand, a full ring small animal PET camera (MiniPET-II) has been built in our Institute as part of succesive R+D projects. The aim of the study was to develop a complete hardware and software system supporting 3D PET-data acquisition, image reconstruction, image processing and evaluating the performance parameters of this scanner according to the guidelines of National Electrical Manufacturers Associations (NEMA) NU-4 standards. Material and methods: The fully modular MiniPet-II scanner consists of 12 detector modules in a single ring with LySO scintillator crystal blocks and position sensitive PNTs. Each crystal block comprises 35 x 35 pins of 1.27 x 1.27 x 12 mm size. Detector signals are processed by FPGA based digital signal processing boards with embedded Linux operating system. Results: Using cluster technique we have implemented a network based data aqui- sition system comprising embedded Linux environment of the detectors and data aquisition computer. A signal processing software controls the processing of the primary data. To support the image reconstruction, software was developed capa- ble of running either on multi-core computers, clusters and computers equipped with graphical processing units as mathematical co-processors. Performance pa- rameters were evaluated by NU-4 protocols. Conclusion: Based on the successful performance test measurements and the first biological studies the MiniPET-II scanner is an appropriate in vivo imaging tool sup- porting small laboratory animal investigations
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idézhető absztrakt
Megjelenés:	Nuclear Medicine Review 12 : 1 (2009), p. 35. -
További szerzők:	Emri Miklós (1962-) (fizikus) Opposits Gábor (1974-) (fizikus, szoftver fejlesztő) Kis Sándor Attila (1973-) (fizikus) Ács László (biológus, informatikus) Balkay László (1963-) (biofizikus) Imrek József (1980-) Novák Dezső Imre (1971-) (villamosmérnök) Hegyesi Gyula (1963-) (villamosmérnök) Valastyán Iván (1979-) (fizikus, informatikus) Bagaméry István Molnár József (1954-) (villamosmérnök)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM015784
Első szerző:	Valastyán Iván (fizikus, informatikus)
Cím:	Cluster based PET and SPECT reconstruction software library / I. Valastyán, M. Emri, L. Balkay, S. Kis, G. Molnár, G. Opposits, J. Molnár, D. Novák, I. Bagaméry, L. Trón
Dátum:	2005
Megjegyzések:	Background: Iterative reconstruction methods of the PET and SPECT technique produce high resolution and good signal-noise ratio images. There are a lot of algo- rithms in the literature, which assume high computational capacity, and they give better quality images than routinely used algorithms do. Material and methods: We aimed at developing a software library which contains the conventional and new reconstruction methods and is good for data acquisition simulation. Our library is easy to adapt for different topological detector systems. Results: The available algorithms are the 2D and 3D filtered back projection, MLEM and OSEM based on one pre-generated high precision system matrix. The current version of the software library allows for studying the effects of matrices generated in different ways. The cluster based implementation enables the studies of the par- allelization of calculation procedures. The programs based on this library were test- ed on data acquired by our small animal PET camera.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idézhető absztrakt egyetemen (Magyarországon) készült közlemény
Megjelenés:	Nuclear Medicine Review 8 : 1 (2005), p. 75. -
További szerzők:	Emri Miklós (1962-) (fizikus) Balkay László (1963-) (biofizikus) Kis Sándor Attila (1973-) (fizikus) Molnár Gergely (1979-) (informatikus) Opposits Gábor (1974-) (fizikus, szoftver fejlesztő) Molnár József (1954-) (villamosmérnök) Novák Dezső Imre (1971-) (villamosmérnök) Bagaméry István Trón Lajos (1941-) (biofizikus)
Internet cím:	Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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