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Tingkat Kinerja, Dosis Radiasi Dan Kualitas Citra Computed Tomography Scanner (CT SCAN) Pada Mode Pemeriksaan Kepala

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ABSTRAK
Telah dilakukan penelitian pada CT single slice (SSCT), CT 16 – slice
dan CT 64-slice untuk menganalisis tingkat kinerja, dosis radiasi dan kualitas
citra. Proses penelitian dimulai dengan pengukuran tingkat kinerja dan dosis
radiasi menggunakan seperangkat multimeter dan fantom CTDI kepala. Proses
berikutnya adalah pengukuran kualitas citra menggunakan fantom Gammex ACR
464.
Hasil penelitian menunjukkan bahwa simpangan maksimum akurasi kV
dari SSCT berkisar 1,35-3,40%, CT 16-slice berkisar 0,91-3,88% dan CT 64-
slice berkisar 0,01-1,51%. HVL pada 120 kV semua tipe CT diatas batas
keberterimaan (3,8 mmAl). Akurasi keluaran radiasi 120 kV/100 mAs dan
koefisien linearitas (CL) SSCT berkisar 21,52-30,67 mGy dan 0,017 - 0,299,
CT 16-slice berkisar 22,37-28,14 mGy dan 0,008 - 0,018 dan CT 64-slice
berkisar 12,27 mGy - 17,36 mGy dan 0,004 - 0,010. Simpangan baku pola sebaran
radiasi CTDI100 dari SSCT berkisar 5,04 – 6.98, 16-slice berkisar 2.78 – 5.46
dan 64-slice berkisar 1.86 - 2.00. Hasil pengukuran kualitas citra semua CT Scan,
respon linearitas berada pada kurva kemiringan (R) diatas nilai acuan (R ≤ 0.99).
Homogenitas akurasi CT number, keseragaman noise dan keseragaman CTpusat
dan CTtepi berada pada rentang keberterimaan (± 5 HU). Contrast to Noise Ratio
(CNR) berkisar antara 1,0 – 2,1 sesuai dengan kriteria keberterimaan (CNR ≥
1.0). Serta hasil evaluasi resolusi spasial berkisar antara 6 - 7 lp/cm sesuai dengan
kriteria keberterimaan (≥ 6 lp/cm).
Kata Kunci : SSCT, MSCT, Tingkat Kinerja, Dosis Radiasi, Kualitas Citra

ABSTRACT
Research on performance level, radiation dose and CT scan image quality
has been done. The process of measuring the level of performance and dose of
radiation using a set of multimeter and head CTDI fantom to obtain tube voltage
accuracy, HVL, linearity dose and CTDI100. Evaluation of image quality using
fantom Gammex ACR 464. The data obtained is normalized to obtain constant
image noise.
The results showed that the maximum deviation of kV accuracy from
SSCT ranged from 1.35-3.40%, CT 16-slice ranged from 0.91-3.88% and CT 64-
slice ranged from 0.01 to 1.51%. HVL at 120 kV all CT types above the
acceptability limit (3.8 mmAl). The accuracy of radiation output of 120
kV/100mAs and linearity coefficient (CL) of SSCT ranged 21.52 - 30.67 mGy
and 0.017 - 0.299, CT 16-slice ranged 22.37 - 28.14 mGy and 0.008 - 0.018 and
CT 64- slices range 12.27 - 17.36 mGy and 0.004 - 0.010. The standard deviation
of CTDI100 radiation pattern from SSCT ranged from 5.04 to 6.98, 16-slices
ranging from 2.78 to 5.46 and 64-slice ranging from 1.86 to 2.00. Result of image
quality measurement, linearity response show that slope curve (R) all CT Scan
above reference value (≤0,99). Result of image quality measurement of all CT
Scan, linearity response is on slope curve (R) above reference value (R ≤ 0.99).
The homogeneity of CT number accuracy, noise uniformity and uniformity of
CTcenter and CTedge are in the acceptance range (± 5 HU). Contrast to Noise Ratio
(CNR) ranges from 1.0 - 2.1 according to acceptance criteria (CNR ≥ 1.0). And
the result of evaluation of spatial resolution ranged from 6 - 7 lp/cm in accordance
with acceptance criteria (≥ 6 lp/cm).
Keywords: SSCT, MSCT, Performance Level, Radiation Dose, Image Quality.

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Ketersediaan

035S2FIS

035 S2FIS 17-iv

Perpustakaan FSM Undip (Referensi)

Tersedia

Informasi Detail

Judul Seri

MAGISTER FISIKA

No. Panggil

035 S2FIS 17-iv

Penerbit

: ., 2017

Deskripsi Fisik

-

Bahasa

Indonesia

ISBN/ISSN

-

Klasifikasi

1575

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

organic chemistry

Info Detail Spesifik

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Pernyataan Tanggungjawab

Samburi

Versi lain/terkait

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