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All Journal Jurnal Imejing Diagnostik JOURNAL ONLINE OF PHYSICS JPK: Jurnal Proteksi Kesehatan
Winarno, Guntur
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Health Professions Medicine & Pharmacology Nursing Physics Public Health

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Dosimetry Evaluations in Breast Cancer Using 3D-CRT Technique Ambarsari, Laily Izzati; Irsal, Muhammad; Sutoro, Shinta Gunawati; Apriantoro, Nursama Heru; Winarno, Guntur; Lesmana, Hadi
JURNAL PROTEKSI KESEHATAN Vol 13 No 2 (2024): JPK: Jurnal Proteksi Kesehatan
Publisher : Poltekkes Kemenkes Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36929/jpk.v13i2.933

Abstract

Several previous studies have shown that without dose evaluation and monitoring, there is a potential for deterministic radiation effects in 3D-CRT procedures. This study is expected to close the gap by conducting a more comprehensive evaluation of the 3D-CRT technique for breast cancer patients. The research method is quantitative analysis with a study sample of 20 breast cancer patients. Data processing was carried out by conducting statistical tests for the distribution value of organs at risk (OAR) against the Radiation Therapy Oncology Group (RTOG) guidelines and analyzing the conformity index (CI) and homogeneity index (HI) values according to the values recommended by the International Commission Radiation Unit (ICRU). The results of this study obtained OAR doses for the lungs and heart are still within the tolerance value limits set by RTOG p-value <0.05. then for CI and HI there is a deviation p-value <0.05 that there is a difference between the values obtained and the ICRU recommended value. This is due to the location of the target or tumor adjacent to the OAR, to keep the OAR value in accordance with the specified limit value.
ANALISIS VARIASI ARUS-WAKTU TABUNG (mAs) DAN ITERATIVE RECONSTRUCTION (IR) DENGAN PENGUKURAN MODULATION TRANSFER FUNCTION (MTF) PADA CITRA CT SCAN KEPALA Zikri, Ikhwan; Irsal, Muhammad; Sutoro, Shinta Gunawati; Winarno, Guntur; Mullah, Ikra; Akhridinata, Dinda
JOURNAL ONLINE OF PHYSICS Vol. 10 No. 2 (2025): JOP (Journal Online of Physics) Vol 10 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v10i2.41433

Abstract

To optimize head CT examination protocols, tube current-time (mAs) variation and the use of iterative reconstruction (IR) are often combined to decrease radiation dose to patients, which may have an impact on image quality and radiation dose. Modulation transfer function (MTF) is an objective measurement to determine the spatial resolution of CT images, so it is expected to provide information on ideal optimization parameters considering radiation dose and image quality. The research method is quantitative descriptive type, data collection was carried out at one of the hospitals in Padang in the August-December period of 2024. Then CT imaging was performed using a head CT protocol that was exposed to the phantom daily CT QC with variations in tube-current of 200 mAs, 300 mAs and a combination of IR with iDose and without iDose. The analysis was performed on 10 pieces of head CT images which will then calculate the 50% MTF value using imageJ. After that, the results of the study will be carried out by making a graph of the average value and a comprehensive literature review is carried out to analyze the tube current-time variation with MTF measurements on head CT images. The results showed that the MTF values of the time-current tube and IR variations tended to have the same pattern for all, so that in this study it can be said that variations in tube current-time (mAs) and iterative reconstruction (IR) cannot affect MTF.
Implementasi Pemahaman Radiografer terhadap Exposure Index dalam Optimasi Prosedur Pemeriksaan Radiografi Computed Radiography Irsal, Muhammad; Winarno, Guntur; Sutoro, Shinta Gunawati
Jurnal Imejing Diagnostik (JImeD) Vol. 10 No. 1: JANUARY 2024
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v10i1.10665

Abstract

Background: Increasing the exposure factor is often carried out by radiographers to reduce noise and maintain image quality in computer radiography (CR). Therefore, there is a need for awareness and understanding of the exposure index (EI) to implement optimization procedures in radiographic examinations. Methods: The research method is descriptive and analytical by providing questionnaires to radiographers in PA chest radiographic examinations. This research was carried out at hospitals A, B, and C in the Jakarta-Bogor area with the research carried out between August – October 2023. Statistical analysis used SPSS 27 with data coding previously. After that, the data is processed with descriptive statistics to determine the frequency, distribution, percentage, average, and standard deviation. Then, the test chi-square to determine the relationship between gender, age, education, and work experience in understanding CR optimization procedures. Next, to find out the relationship between age and weight and EI, a test was carried out by Pearson test to determine the level of relationship between the two variablesResults: was found that the level of awareness and understanding of radiographers regarding optimization procedures using EI is still low. Test results chi-square age-understanding 0.309, gender-understanding 0.772, education-understanding 0.036, experience-understanding 0.201. next are the test results Pearson for Hospital-A: age-EI 0.09, weight-EI -0.49, Hospital-B: age-EI -0.21, weight-EI 0.06, Hospital-C: age-EI -0.37, weight-EI 0.56. Conclusions:  implementing EI in the optimization procedure, it needs to be confirmed by measuring the patient's radiation dose so that there are no errors in implementing the optimization.
Analisis Perbandingan Hasil Spektrum Magnetic Resonance Spectroscopy Brain Dengan Variasi Ukuran Volume of Interest (VOI) Pada MRI Phillips 3T Icha, Aunisa; Prananto, Legia; Winarno, Guntur
Jurnal Imejing Diagnostik (JImeD) Vol. 10 No. 2 (2024): JULI 2024
Publisher : Poltekkes Kemenkes Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31983/jimed.v10i2.11753

Abstract

Background: Technically, by applying MR Spectroscopy it possibly makes that signal from several numbers of different chemical compounds can be obtained, separated, and quantified in simultaneous way. In relation to which, the quantification of brain metabolites in 1H MRS depends on the separation of spectroscopy signal of each metabolites. In this matter, spectrum results will be influenced by the size of volume of interest. In this matter, volume of interest (VOI) is a specific area in the tissue, whereby the metabolites of which, are analyzed. This research aims to analyze the comparison of the results of brain MRS spectrum with the different variation of Volume of Interest (VOI) measurements in MRI Phillips 3T.Methods: Design of this research applies quantitative method with experimental approach by using Philips Ingenia 3 Tesla MRI machine undertaken at radiology installation of Regional General Hospital Ciawi toward 11 brain MRI patients undergoing Magnetic Resonance Spectroscopy with the different variation size of Volume of Interest (VOI) namely 1.0 × 1.0 ×1.0 cm, 1.5 × 3.0 ×1.5 cm, and 2.0 × 2.0 × 2.0 cm.Results: This research suggests that there is a different height of NAA, Choline, Creatine, and Glx metabolites whereas for Myo-inositol, Lipids and Lactate metabolites there is not any significant difference. Meanwhile for Full Width Half Maximum, there is a significant difference with different variation of volume of interest (VOI).Conclusions: There is a significant difference in the height of metabolites NAA, Choline, Creatine, Glx (p value < 0,05), whereas for metabolites of Myo-Inositol, lipids, and Lactate (p value > 0,05) there were no significant differences at different variations of Volume of Interest (VOI). There is a significant difference with a p value of 0.000 < 0.05 in the Full Width Half Maximum (FWHM) value with different Volume of Interest (VOI) variations where the highest average Full Width Half Maximum (FWHM) value is VOI C (2.0 × 2.0 × 2, 0 cm) with an average of 21.476 followed by VOI B (1.5 × 3.0 × 1.5 cm) of 20.603 and the lowest average FWHM value is VOI A (1.0 × 1.0 × 1.0 cm) of 15.985 which means that the larger the size of the Volume of Interest (VOI), the higher the Full Width Half Maximum (FWHM) value will be. The size of the Volume of Interest (VOI) for the hippocampus area must be adjusted to the size of the patient's hippocampus because a size that is too large will cause unwanted areas to enter the Volume of Interest (VOI) and affect the spectrum results.
Co-Authors Akhridinata, Dinda Ambarsari, Laily Izzati Icha, Aunisa Irsal, Muhammad Lesmana, Hadi Muhammad Irsal Mullah, Ikra NURSAMA HERU APRIANTORO Prananto, Legia Shinta Gunawati Sutoro Zikri, Ikhwan