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All Journal JURNAL FISIKA Jurnal Ilmiah Giga JURNAL ILMIAH PENDIDIKAN FISIKA AL BIRUNI JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika)
Sari, Ni Larasati Kartika
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Earth & Planetary Sciences Education Electrical & Electronics Engineering Physics

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Evaluasi Indeks Massa Tubuh (IMT) sebagai Dasar Penentuan SSDE (Size-Specific Dose Estimate) pada Pemeriksaan CT Scan Abdomen Sari, Ni Larasati Kartika; Prataminingsih, Prataminingsih; Santoso, Budi
Jurnal Fisika Vol 12, No 2 (2022)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v12i2.40396

Abstract

SSDE (Size-Specific Dose Estimate), merupakan parameter dosis CT Scan yang sudah memasukkan komponen ukuran tubuh pasien, yaitu diameter efektif (DE). SSDEDE kurang menggambarkan dosis pasien karena pengukuran DE hanya pada midslice citra. Penelitian ini mengevaluasi penggunaan indeks massa tubuh (IMT) sebagai alternatif ukuran DE, untuk mendapatkan SSDE CT Scan Abdomen. Analisis paired sample t-test, uji t parsial, uji linearitas (ANOVA) dan korelasi (pearson correlation) IMT terhadap DE, parameter dosis seperti, CTDIvol (Computed Tomography Dose Index-volumetric), DLP (Dose Length Product), dan SSDE dilakukan dari 64 data pasien. Hasil uji menyatakan bahwa IMT dan DE berbeda secara nyata, dan saling mempengaruhi. Nilai koefisien determinasi IMT-DE 0,854 (p 0,05) dan korelasinya 0,924 (p 0,001), yang berarti sangat kuat dan bersifat positif, sehingga IMT dapat digunakan sebagai alternatif ukuran pasien dalam menentukan SSDE. Hasil uji IMT dengan parameter dosis menunjukkan saling berbeda dan saling mempengaruhi. Hasil uji linearitas juga menunjukkan ketiganya memiliki hubungan yang linear. Nilai korelasi (r) = 0,930 untuk IMT-CTDIvol, r = 0,922 untuk IMT-DLP dan r = 0,846 untuk IMT-SSDEIMT dengan nilai p value ketiganya adalah p 0,001. Hal ini berarti koefisien korelasinya dapat dikategorikan sangat kuat dan bersifat positif.SSDE (Size-Specific Dose Estimate) is a CT Scan dose parameter that includes the patient's size component, effective diameter (ED). SSDEED still doesn’t represent the patient dose well because ED only measured in the image’s midslice. This study evaluates the use of body mass index (BMI), as an alternative size metric for the SSDE calculation in abdominal CT Scan. Paired sample t-test, partial t-test, ANOVA and Pearson correlation test between BMI, DE, dose parameters such as CTDIvol (Computed Tomography Dose Index-volumetric), DLP (Dose Length Product), and SSDE was performed in 94 data. The results show that  BMI and ED values are significantly different and influencing each other. The coefficient of determination of BMI-ED is 0.854 (p 0.05) and the correlation coefficient is 0.924 (p 0.001). This means that the correlation between BMI-ED is very strong, so BMI can be used as an alternative to replace ED in determining SSDE. BMI and dose parameters are also influencing each other and have linear relationship. The correlation value (r) of BMI-CTDIvol is 0.930, BMI-DLP is 0.922, and  BMI-SSDEBMI is 0.846  with the p value being p 0.001, means that the correlation can be categorized as very strong and positive.
The Implementation of the Dilemma-STEAM Model in Fluid Dynamics Subjects through the Archimedes Screw Project Nasbey, Hadi; Sabrina, Putri Marsha; Sari, Ni Larasati Kartika; Muliyati, Dewi
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol. 10 No. 1 (2024): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 10 Issue
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.10116

Abstract

Physics is one of the sciences that is closely related to daily life, one example being fluid material material. However, the understanding of physics, especially fluid material, is still relatively low. These problems can be overcome by applying a learning model that is integrated with teaching materials that have developed over time. The dilemma STEAM learning model is a learning model that can help students to understand physics based on students' experiences. The dilemma STEAM learning model has five learning stages that can make learners recognize the problem, find solutions, and then solve the problem. This study aims to develop teaching materials based on the dynamic dilemma STEAM learning model based on the dilemma STEAM learning model. The development of the Archimedes Screw Project equipped with E-Modules as teaching materials was developed using the ADDIE development model. The ADDIE development model has several stages, namely Analysis, Design, Development, Implementation, and Evaluation. E-Modules are made using the Canva application which can be accessed anywhere and anytime. After the E-Module was developed, the next stage was the feasibility test of the E-Module by experts. The results of the feasibility test by media experts obtained a result of 88.3% with a very feasible category. Meanwhile, the results of the feasibility test by material experts obtained a result of 84% with a very feasible category. And the results of the feasibility test by learning experts obtained a result of 83.3%. And the readability of the E-Modul by the student after using it is 72.4% with a good read, which is demonstrated by the success of the student assembling Archimedes Screw by following five stages of the dilemma STEAM learning model.
Evaluasi Size Specific Dose Estimate Berdasarkan Diameter Efektif (SSDEDE) Pemeriksaan Abdomen di DKI Jakarta Sari, Ni Larasati Kartika; Wonga, Hiasintus; Hartoyo, Puji; Anita, Febria; Repi, Viktor Vekky Ronald; Muliyati, Dewi
Jurnal Ilmiah Giga Vol. 26 No. 2 (2023): Volume 26 Edisi 2 Tahun 2023
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v26i2.2865

Abstract

CTDIvol merupakan salah satu besarab dosis CT Scan yang dihitung berdasarkan fantom dengan diameter 16 cm atau 32 cm sehingga belum mewakili dosis pasien secarra akurat. Size-Specific Doses Estimate (SSDE) merupakan parameter dosis pasien CT Scan yang memasukkan unsur ukuran tubuh pasien yaitu DE (Diameter Efektif). Penelitian ini bertujuan untuk melaporkan nilai SSDEDE dan CTDIvol pada pemersiksaan abdomen di DKI Jakarta dan kolerasi SSDEDE dan CTDIvol. Penelitian ini dilakukan pada lima rumah sakit di DKI Jakarta, dimana sampel 20 pasien pemeriksaan CT Scan abdomen diambil dari masing-masing rumah sakit. Nilai SSDEDE diperoleh dari perhitungan dengan persamaan yang tertera pada AAPM report no. 204. Hasil menunjukkan bahwa, secara umum, nilai parameter dosis SSDEDE lebih tinggi dari CTDIvol pada pasien yang sama. Selain itu, rumah sakit di Jakarta Selatan memiliki nilai SSDEDE dan CTDIvol tertinggi, yaitu 38.534 mGy dan 28.016 mGy. Hasil tersebut menunjukkan pengaruh ukuran tubuh pasien terhadap perhitungan dosis serta SSDEDE menunjukkan potensi sebagai parameter dosis dalam penentuan DRL terlihat dari nilai koefisien kolerasinya (R2 ) 0.8992.
Impact of Different Grids on the Quality of Abdominal Radiography Images Shekti, Shitoch Armandho Bimo; Sari, Ni Larasati Kartika; Hartoyo, Puji; Muliyati, Dewi
Jurnal Ilmiah Pendidikan Fisika Al-Biruni Vol 13 No 1 (2024): Jurnal Ilmiah Pendidikan Fisika Al-Biruni
Publisher : Universitas Islam Negeri Raden Intan Lampung, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jipfalbiruni.v13i1.22202

Abstract

Grids are additional accessory in radiography that absorb scatter radiation hoping to reduce blurriness on the image.  Various type of grids is available in the market so the effect of those on image quality needs to be evaluated. The purpose of this study is to compare the quality of abdominal radiography images using three variations of grids (moving and stationary grid) and without using a grid in order to see the best type or grids to produce the greatest image quality. Abdominal radiography exposure factors were used to expose two phantoms. Pro-Fluo 150 phantom was used as the object to measure image quality such as Signal to Noise Ratio (SNR), Contrast to Noise Ratio (CNR), and spatial resolution. A survey of five radiologists was also performed to evaluate the contrast and the visibility of objects’ boundaries in Anthropomorphic phantom images. The result of this study showed that the usage of various grids gave different values of SNR, CNR, and spatial resolution. The exposure factor of 70-75 kV in each mAs have the highest SNR value (52,64-78,31). Images obtained without a grid and exposure factor of 80-85 kV in each mAs have the highest SNR value (160,65-800,48). Images obtained from using moving grid also have the highest CNR and spatial resolution, with score of 3.72 – 7.62 and 3.7 lp/mm. The results of radiologists’ survey showed that the average score for moving grid’s images was 29.8 of 30 with a percentage of 99.33%. Therefore, it that can concluded that images obtained with moving grid have the best quality that can provides contrast and shows the boundaries between organs clearly in abdominal radiography. Based on this research, it’s recommended to use moving grid for abdominal radiography examinations.
Exploring Mechanical Waves Through a Physics-Based Exploration Game for Secondary Education Budi, Agus Setyo; Permana, Handjoko; Yasti, Arfa Hanania; Fitriani, Wulandari; Sari, Ni Larasati Kartika; Mutoharoh, Mutoharoh; Sabrina, Putri Marsha; Muliyati, Dewi
Jurnal Penelitian & Pengembangan Pendidikan Fisika Vol. 11 No. 1 (2025): JPPPF (Jurnal Penelitian dan Pengembangan Pendidikan Fisika), Volume 11 Issue
Publisher : Program Studi Pendidikan Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/1.11109

Abstract

Mechanical waves are an important part of high school physics, but they can be hard to understand because they are so abstract. The goal of this study was to create and test a physics-based digital exploration game that would help people understand wave phenomena. The game content included electromagnetic and mechanical waves, transverse and longitudinal waves, and the Doppler effect. This study employs a simplified instructional design model focusing on three key steps: analysis, design, and development. This model aims to enhance student engagement through the use of digital platforms and interactive learning resources such as educational games and mobile applications. Playzone was built on the CORE APPS platform. It had a shooting game set in a lab with tasks that required players to unlock objects, find clues, and get to areas that boost health. The expert reviewed the curriculum alignment, how the materials were presented, and how the evaluations worked. The assessment gave this game prototype a score of 89.33%, which means it is very feasible as learning media. These results show that the game could be very useful in the classroom because it makes learning about abstract physics concepts more fun and easier to understand by using stories and interactive activities.
Evaluasi dosis CT Simulator pada Radioterapi Head and Neck dan Pelvis Nurkamal, Aris; Sari, Ni Larasati Kartika; Ryangga, Dea; Mubarok, Sayid
Jurnal Ilmiah Giga Vol. 27 No. 1 (2024): Volume 27 Edisi 1 Tahun 2024
Publisher : Universitas Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47313/jig.v27i1.3755

Abstract

CT Simulator merupakan modalitas pencitraan dalam Radioterapi yang digunakan untuk delineasi dan kalkulasi dosis pada perencanaan terapi. AAPM TG.204 menyediakan faktor konversi yang lebih spesifik berdasarkan ukuran tubuh pasien untuk koreksi CTDIVol, karena CTDIVol bukanlah dosis radiasi yang diterima langsung oleh pasien. Meskipun memberikan manfaat, perhatian terhadap strategi penghematan dosis pada CT masih kurang. Penelitian ini bertujuan untuk mengevaluasi persentase peningkatan dosis radiasi menggunakan Size Specific Dose Estimate (SSDE) sesuai referensi AAPM TG.204. Jumlah pasien CT HNC dan CT Pelvis masing-masing adalah 10. Nilai CTDIVol pada konsol diverifikasi menggunakan dosimeter chamber pada fantom CTDI Body. Hasil penelitian menunjukkan rata-rata nilai verifikasi CT HNC sebesar 2,78% dan CT Pelvis sebesar 2,02% (sesuai standar ACR, Bapeten ≤ 20%). Nilai rata-rata SSDE untuk CT HNC adalah 83,02 mGy dan untuk CT Pelvis 39,08 mGy. Rata-rata persentase peningkatan dosis terhadap dosis preskripsi terapi untuk CT HNC adalah 1,6% dan untuk CT Pelvis 0,43% (di bawah ICRU Report 50). Dosis CT HNC lebih besar karena arus tabung (mA) yang lebih tinggi sehingga intensitas sinar-X meningkat, ditambah Rotation Time (s) yang lebih lambat menyebabkan waktu paparan radiasi lebih lama, yang berpengaruh pada peningkatan dosis radiasi. Nilai dosis CT Pelvis melebihi nilai referensi I-DRL yaitu 17 mGy, dengan nilai rata-rata sebesar 27,31 mGy. Optimalisasi parameter pemindaian sangat penting, serta penggunaan modalitas pencitraan non-radiasi pengion seperti MRI yang memiliki berbagai keunggulan.
Co-Authors A. Handjoko Permana Agus Setyo Budi Dewi Muliyati Dwi Budi Santoso Febria Anita, Febria Hadi Nasbey Hartoyo, Puji Mubarok, Sayid Mutoharoh, Mutoharoh Nurkamal, Aris Prataminingsih, Prataminingsih Repi, Viktor Vekky Ronald Ryangga, Dea Sabrina, Putri Marsha Shekti, Shitoch Armandho Bimo Wonga, Hiasintus Wulandari Fitriani Yasti, Arfa Hanania