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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS SEMAR
Mohtar Yunianto
( SCOPUS ID: 57190936216 ) Physics Department, Universitas Sebelas Maret
Humanities Astronomy Education Energy Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Social Sciences

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Performance Analysis of EPC Material as a Kidney Organ Phantom with Exposure Voltage Variations and PA-GF-Based Kidney Stone Size Cari Cari; Mohtar Yunianto; Fuad Anwar; Hardo Ardiansyah Gilang Permadi
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 15, No 2 (2025): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v15i2.106579

Abstract

Research in the field of radiodiagnostics has been extensively developed, creating the need for substitute objects to represent human organs—namely, radiological phantoms. A phantom is a simulated model of an organ fabricated using 3D printing technology. This study aims to evaluate the suitability of Expanded Polyamide – Glass Fiber (EPA-GF) as a kidney stone phantom material embedded within a kidney phantom, based on parameters such as material density, CT number, electron density, and radiation dose across various CT scan exposure voltages. The phantom samples were printed using a dual-extruder 3D printer, with Expanded Polycarbonate (EPC) used as the kidney phantom material. CT scan exposure voltages were set to 80 kV, 100 kV, and 120 kV. Kidney stone sizes used in this study ranged from 1 mm to 8 mm (1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, and 8 mm). The measured density of EPA-GF was 1.51 ± 0.06 g/cm³. The CT numbers obtained at each voltage were 373.30 HU, 329.05 HU, and 299.46 HU, respectively. The corresponding electron density values were 1.231, 1.210, and 1.196, respectively. The effective doses measured at each voltage were 0.0240 mSv, 0.0448 mSv, and 0.0798 mSv. All parameter values were found to be closely aligned with literature references. The smallest visible kidney stone size detected was 2 mm.
Upaya mewujudkan Desa Wonorejo menjadi Desa Pangan Aman melalui implementasi Sistem Pengusir Hama berbasis Panel Surya Mohtar Yunianto; Fuad Anwar; Sorja Koesuma
SEMAR (Jurnal Ilmu Pengetahuan, Teknologi, dan Seni bagi Masyarakat) Vol 14, No 2 (2025): November
Publisher : LPPM UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/semar.v14i2.106021

Abstract

Telah diimplementasikan sistem cerdas pengusir hama berbasis panel surya, Alat pengusir hama otomatis ini memanfaatkan gelombang ultrasonik dengan tiga pengaturan: 3–6 kHz untuk burung, 20–31 kHz untuk serangga, dan 31–50 kHz untuk tikus serta kelelawar. Suara yang dihasilkan bervariasi dari bising hingga tak terdengar oleh manusia. Alat ini menggunakan panel surya dan baterai internal, serta dilengkapi dua mode otomatis: siang (S) aktif saat terkena sinar matahari dan malam (M) saat gelap. Kedua mode dapat disesuaikan sesuai jenis hama dan waktu penggunaan, sehingga mendukung efektivitas pengendalian hama secara berkelanjutan. Alat ini telah terpasang di Desa Wonorejo selama periode pemsasngan sudah memberikan dampak yaitu berkurangnya burung dan tikus disekitar lokasi pemasangan alat dan dengan harapan ada peningkatan kuantitas panen petani.
Co-Authors Anwar, Fuad Cari Cari Fuad Anwar Hardo Ardiansyah Gilang Permadi Sorja Koesuma