Instrumen Uji Penyakit Gondok Berbasis Isotop I-131

Sumardi, Sumardi (2006) Instrumen Uji Penyakit Gondok Berbasis Isotop I-131. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam diagnosis kelainan kelenjar gondok dilihat dari bentuk fisiknya yang lebih besar dari normal. Dengan cara diagnosis tersebut belum didapatkan data yang akurat dari fungsi serapnya. Untuk itu diperlukan instrumen uji dengan menggunakan energi radiasi yang dimasukkan ke tubuh dari sumber radioisotope I-131 yang akan diubah menjadi foton melalui kristal NaI dan foton diubah menjadi sinyal listrik melalui photo multiplier tube (PMT) serta diolah sinyalnya dalam bentuk counting melalui proses pengolahan sinyal dan pengolahan data melalui interface dalam bentuk grafik maupun numerik. Dalam uji instrumen ini didapatkan uji kesetabilan dengan chi test didapatkan nilai sebesar 19,54 dari harga yang diijinkan 10,1 < harga Chi $X^2$ < 30,1 menurut IAEA. Dari pengukuran didapatkan fungsi penyerapan dari beberapa pasien hyperthyroid pada pengukuran 2 sampai 4 jam melebihi dari 10-30% yaitu 85,4%, untuk hypothyroid 4 sampai 24 jam hasilnya sama dengan 60,3% melebihi 55% dan 14,5% kurang 25% dari nilai normal adalah 25-55%.
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Thyroid gland disorder can be seen when diagnosing is performed by observing its physical shape which is bigger than normal. Through this diagnosis, however, the accurate data of its absorption function cannot be obtained. For that reason, it needs test instrument using radiation energy inserted to the body from I-131 radioisotope source which is transformed into photon through NaI crystal. The photon then is transformed into electrical signals by using photo multiplier tube (PMT). The signals generated are processed through signals and data processing in the form of counting in graphical and numerical interface. In this instrument test, it is obtained that stability test by Chi test equals to 19.54 from allowed value of 10.1 < Chi Value $X^2$ < 30.1 according to IAEA. From the measurement, it is obtained that absorption function of some hyperthyroid patients for 2 until 4 hours is higher than 10-30% i.e. 85.4%; while hypothyroid patients for 4 until 24 hours equals to 60.3% meaning larger than 55% and 14.5% meaning less than 25% from its normal value i.e. 25-55%.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Radioisotop, Chi test, Hypertiroid, Hypoteriod
Subjects:	R Medicine > R Medicine (General) > R856.2 Medical instruments and apparatus.
Divisions:	Faculty of Industrial Technology > Electrical Engineering > 20101-(S2) Master Thesis
Depositing User:	magang .
Date Deposited:	30 Sep 2026 06:42
Last Modified:	30 Sep 2026 06:42
URI:	http://repository.its.ac.id/id/eprint/145086

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