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Assessment of regularization techniques used in electrocardiographic imagingMilanič, Matija ; Jazbinšek, Vojko ; Hren, RokElektrokardiografsko slikanje (angl., Electrocardiographic imaging ECGI) je uveljavljena metoda, s katero iz izmerjenih električnih potencialov na površini torza izračunamo električne potenciale na ... površini epikarda. Glavni izziv ECGI ostaja njena slaba pogojenost problema, kar zahteva regularizacijske tehnike, s katerimi zgladimo rešitve; delež glajenja, ki še vedno da klinično sprejemljive rezultate, je tema te raziskave. V študiji smo sistematično primerjali različne matematične tehnike, ki regularizirajo ECGI inverzni problem. Kot vhodne podatke smo uporabili izmerjene električne potenciale na valjasti kletki, v kateri je bil fiziološki izvor (pasje srce) in je bila postavljena v tank v obliki torza napolnjen z elektrolitsko raztopino, iz katerih smo izračunali potenciale na površini tanka (direktno računanje). Iz teh potencialov smo potem z inverznim računanjem rekonstruirali potenciale na površini valjaste kletke s 14 različnimi regularizacijskimi tehnikami. Ugotovili smo, da so ne-kvadratne metode (algoritem totalne variacije) najbolj robustne in dajo najmanjše napake rekonstrukcije.Source: Zbornik devetnajste mednarodne Elektrotehniške in računalniške konference ERK 2010, Portorož, Slovenija, 20.-22. september 2010 (Str. B: 319-322)Type of material - conference contributionPublish date - 2010Language - englishCOBISS.SI-ID - 15727449
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Database name | Field | Year |
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Milanič, Matija | 22288 |
Jazbinšek, Vojko | 08274 |
Hren, Rok | 12628 |
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