20.500.12556/DKUM-65923 Nizkocenovni sistem za merjenje oksigenacije kožnih, podkožnih in možganskih tkiv s pomočjo bližnje infrardeče spektroskopije A low-cost system for nirs-based assessment of skin, adipose and brain tissue oxygenation Bližnja infrardeča spektroskopija omogoča neinvazivno spremljanje oksigenacije tkiv. Zaradi optičnih lastnosti človeškega tkiva in vsebovanih kromofor, je svetloba bližnje infrardeče regije posebej primerna za spremljanje koncentracij oksi- in deoksihemoglobina. V magistrskem delu zasnujemo in izdelamo sistem za opravljanje meritev stopenj oksigenacije s pomočjo bližnje infrardeče spektroskopije. Izdelana naprava sestoji iz optoelektronskega senzorja in krmilnega vezja. Optoelektronski senzor sestavljajo dvobarvna svetleča dioda, ki oddaja svetlobo z valovnima dolžinama 750 in 850 nm ter par različno oddaljenih fotodiod. Za analogno digitalno pretvorbo signalov optoelektronskega senzorja skrbi krmilno vezje, ki zajete signale pošilja na osebni računalnik, kjer jih dekomponiramo in izračunamo relativne spremembe stopnje oksigenacije. Delovanje izdelanega sistema smo preverili z večkratnimi meritvami somatske in cerebralne oksigenacije zdravega preiskovanca. Near-infrared spectroscopy supports non-invasive monitoring of tissue oxygenation. Due to the optical properties of human tissue and its contained chromophores, the light of near infrared region is especially suitable for monitoring concentrations of oxy- and deoxy hemoglobin. In this master's thesis we describe the design and implementation of a system for measuring oxygenation levels using near-infrared spectroscopy. This device comprises of an optoelectronic sensor and control circuit. Optoelectronic sensor is composed of a bi-color light emitting diode which emits light with wavelengths of 750 and 850 nm and a couple of differently spaced photodiodes. The analog to digital conversion of the optoelectronic sensor’s signal is carried out on the control circuit, which sends signals to the personal computer where they are decomposed and processed by specific algorithms to calculate the relative change in oxygenation level. We tested the designed system by performing multiple measurements of somatic and cerebral oxygenation on a healthy young subject. bližnja infrardeča spektroskopija merjenje oksigenacije somatska oksigenacija cerebralna oksigenacija near-infrared spectroscopy measurement of oxygenation somatic oxygenation cerebral oxygenation true true false [S. Zemljič] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2017-05-30 12:42:36 2017-07-03 12:50:14 2022-07-09 03:11:36 2019-07-11 15:34:09 2017 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 [004:616-71]:615.835(043.2) 20703510 URN:SI:UM:DK:ZAH1C1MJ MAG_Zemljic_Saso_2017.pdf MAG_Zemljic_Saso_2017.pdf 1 C68ECCD5D0BD0A400097107C0217887B 0d9985f9b545030a76109ee1668cdadfc11f23cb5cca87ba101e7c8778acad48 2d25f484-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=111847 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0