PENGARUH PERUBAHAN TEGANGAN TABUNG (KVP) TERHADAP CT NUMBER DAN UNIFORMITASNYA PADA PESAWAT CT SCAN
ABSTRACT: An examination of
consistency of CT numbers and its uniformity due to variation of the tube voltage
has been done. The examination was conducted using water and polyethyelene
phantoms as a test object. The method of scanning, which are axial
scanning and helical scanning.
The scanning was taken 5 (five) slices with slice thickness of 5 mm. Variations
in tube voltage used were 80 kV, 120 kV
and 140 kV. The tube current 160 mA and
time scanning 2 seconds. It was obtained that the increase in voltage from 80
kV to 140 kV led to increase the value of CT number both for water and
polyethylene phantoms. The uniformity of CT number for all ROI varies, but
still within the range of tolerance limits. The CT number for the water phantom
does not exceed 0 ± 5 HU and for polyethylene phantom does not exceed -300 to
-100 HU..
Penulis: Anugrah Ariyani S.,
Wahyu Setiabudi, Choirul Anam
Kode Jurnal: jpmatematikadd120293
