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Choirul Anam AM Diponegoro
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Diponegoro University, Jl. Prof. Soedarto SH, Tembalang, Semarang 50275, Central Java, Indonesia
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PENGARUH ARUS TABUNG TERHADAP NOISE DAN KONTRAS CITRA PADA PESAWAT CT SCAN Riyanto, Slamet; Budi, Wahyu Setia; Anam, Choirul
BERKALA FISIKA Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019
Publisher : BERKALA FISIKA

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Abstract

This study aims to evaluate the effect of tube current on noise and low contrast resolution in CT scan images. Determination of the noise and the low contrast resolution was carried out using the built-in phantom of CT scan. To determine the noise, a phantom section consisting of homogeneous water (water filled phantom) was used, and to determine the low contrast resolution, a phantom section consisting of a polystyrene box was used. The images were taken in an axial mode, using a voltage of 120 kVp, rotation time of 2 seconds, beam collimation of 10x2.5 mm, and slice thickness of 7 mm. The tube current was varied from 80 mA to 200 mA. At each scanning, 3 (three) slices were taken. The results show that an increase of the tube current from 80 mA to 200 mA causes a decrease in THE noise, but does not affect TO the low contrast resolution. At the same low contrast resolution, an increase of the noise decreases object detectability.Keywords: tube current, image noise, low contras resolution, axial scanning, CT scan
TINGKAT KETERBACAAN, KETERUNDUHAN, DAN SITASI BERKALA FISIKA Anam, Choirul
BERKALA FISIKA Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019
Publisher : BERKALA FISIKA

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Abstract

Tingkat Keterbacaan, Keterunduhan dan Sitasi Berkala Fisika
ANALISIS GUGUS FUNGSI PADA SAMPEL UJI, BENSIN DAN SPIRITUS MENGGUNAKAN METODE SPEKTROSKOPI FTIR Anam, Choirul; Sirojudin, Sirojudin; Firdausi, K. Sofjan
BERKALA FISIKA Vol 10, No 2 (2007): Berkala Fisika
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Abstract

An analysis of functional groups using FTIR (Fourier Transform Infra Red) spectroscopy in test samples, such as petroleum and spiritus compound has been done.The spectral of the functional groups is observed by comparing of the absorption band which is formed on infra red spectrum with the infra red lines standard and comparing with other known compound. It is expected that functional group identification can be done effectively.Infra red spectrums of petroleum show the group of methyl (CH3), alkenes and aromatic compound. That results analysis is supported by appearance of bending symmetric vibration of C-H and the presence of stretching vibration of C=C from aromatic ring. The spiritus spectrums show the group of hydroxyl from alcohol compound. That analysis is supported by appearance of wide band on 3500–3000 cm-1 and appearance of band on 1000–1100 cm-1.  While test sample spectrum show the group of hidroksil (O-H) from primary alcohol, group of metil (CH3), triple bond (C≡C–H), group of nitril (R–C≡N), double bond (C=C) and C-N.   Keyword: FTIR spectroscopy, vibration, infra red spectrum, absorption, functional group
Simulasi Pencitraan Ultrasonografi (USG) Menggunakan PdeTool Matlab Anam, Choirul
BERKALA FISIKA Vol 12, No 3 (2009): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Diagnostic imaging with ultrasound is based on the mechanical properties of an object. To evaluate how the ultrasound wave propagates in an object and imaging of the object, can be done with simulation techniques. Simulation of ultrasound wave propagation was performed using Matlab pdetool. The simulation was conducted to determine the image quality due to the influence from variation of the object, variations in the number of objects, various types of objects and variations in frequency of the signal. From the simulation showed that the ellipse and box objects can be distinguished. If the number of object is increased, will cause the image more complex. This happens because the waves are about an object, it would interfere with ultrasound waves that will be used to image the next object. If two objects have different c is high enough, then the imagery on the field boundary of two mediums was very clear. Conversely, if the difference is very small c, then the boundary of two mediums were not visible. If the frequency rises, causing axial resolution increase, but cause increased attenuation.   Keywords: USG, Simulation, pdetool Matlab
PEMBUATAN KURVA ISODOSIS 2D DENGAN MENGGUNAKAN KURVA PERCENTAGE DEPTH DOSE (PDD) DAN PROFIL DOSIS DENGAN VARIASI KEDALAMAN UNTUK TREATMENT PLANNING SYSTEM Nurul Ihya, Farhatin; Anam, Choirul; Gunawan, Vincensius
BERKALA FISIKA Vol 16, No 4 (2013): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

Treatment Planning System (TPS) is very necessary in radiotherapy planning to give the accurate radiation dose given to the patient.  In the TPS, 2D isodose curve is used to determine thedose distribution with the same rate at a certain distance from the radiation source.  The isodosecurve is obtained from the Percentage Depth Dose (PDD) and dose profile.  Measurement data ofPDD and dose profiles obtained from Kensaras Hospital in Semarang.  The PDD and dose profiledata were obtained from testing the water phantom for soft tissues such as muscles or other bodytissues.  Dose profile curve which is used  is at a various depth, such as: 1.5 cm, 5 cm, 10 cm, 15cm, 20 cm and 25 cm with an area of 5 x 5 cm2field, 10 x 10 cm2, 15 x 15 cm2, 20 x 20 cm, 30 x 30cm2 and 40 x 40 cm2.  At each depth of curve profile, the dose at the surface is calculated  andnormalized using  interpolation and normalized by narrowing techniques. 2D isodose curveobtained from the weighting technique to the calculation of the dose profile curve. In the field sizeof 5 x 5 cm2 and 10 x 10 cm2, isodose curve formed better in the absence of horn at the edge of thecurve.  In the field size larger than 10 x 10 cm2 there are horns on the edge of the curve at thelower depths.Keywords : Treatment Planning System (TPS),  2D Isodose curve, Percentage Depth Dose (PDD),Dose profile.
Prediction of 2D Isodose Curve on Arbitrary Field Size in Radiation Treatment Planning System (RTPS) Nugraheni, Dewi Tri; Gunawan, Vincensius; Anam, Choirul
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 1 Year 2015
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

The study on prediction of 2D isodose curves for atbitrary field size has been done. Isodose curve is very useful for plannning and evaluation of doses received by patients in the radiotherapy treatment. The percentage depth dose (PDD) and dose profiles data for standard field size (square) were obtained from measurements in the Kensaras hospital, Semarang Regency. Dose profiles were taken at a depth of 1.5 cm and a radiation source to skin distance (SSD) of 100 cm. The calculation of PDD data in any field size uses linear interpolation method. While the calculation of the dose profile curve uses the widening, narrowing and weighting interpolation method. Firstly, the calculation of PDD and dose profile for standard field sizes of 3x3, 10x10, 15x15 and 20x20 cm2 were carried out and the results were compared to the measurements. Secondly, the PDD and dose profile for arbitrary field sizes 7x7 dan 13x13 cm2 were calculated. After that, the isodose curves for arbitrary field sizes were generated. The results showed that PDD curves of standard field sizes have maximum deviation values < 5% compared to the measurements. While the dose profile curves for field sizes up from 5x5 cm2 have maximum deviation values approximately 5% which was less than measurement. The profile curve of field size of 3x3 cm2 has maximum deviation value >5%. These results showed that our proposed algorithm was relatively valid. In this study, the PDD, dose profile and isodose curves of arbitrary field sizes 7x7cm2 and 13x13 cm2 were succesfully generated.
HISTOGRAM DAN NILAI DERAJAT KEABUAN CITRA THORAKS COMPUTED RADIOGRAPHY (CR) UNTUK PENDERITA TUBERCULOSIS (TB) PARU-PARU Endahyani, Siti Nur; Adi, Kusworo; Anam, Choirul
JURNAL SAINS DAN MATEMATIKA Volume 18 Issue 4 Year 2010
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Abstract

ABSTRACT---Tuberculosis (TB) is an infectious disease caused by the bacteria mycobacterium tuberculosis. TB is the number one killer among infectious diseases, and even Indonesia occupies the fifth largest country in the world in this disease problem. Detection of TB disease through clinical symptoms, laboratory tests and thoracic imaging (lung) with x-ray. The research was conducted to determine the histogram and the average value of gray scale image of the thoracic patients suffering from TB and who is not. By knowing the value of the histogram and the mean gray scale this can later be used as additional instructions for medical personnel to diagnose, i.e. to determine whether the patient has TB or not. In this research, the exposure factors was carried out with a tube voltage of 55 kV, tube current 200 mA and time 0.08 s, using of the Computed Radiography (CR). Histogram analysis performed on the Region Of Interest (ROI) that is at the apex of the lung and superior lung lobes contained patches of gloom on the image of the thorax. It was obtained that the image histogram from TB patients shifted to the right or the gray scale pixel values have a higher (brighter). The average value of pixel gray scale image of the patient suffering from tuberculosis at 13,3 and for patients who are suffering from TB at 61,6.Key words: thoracic imaging, Tuberculosis, histogram ABSTRAK---Penyakit Tuberculosis (TB) merupakan suatu penyakit menular yang disebabkan oleh bakteri mycobacterium tuberculosis. TB merupakan pembunuh nomor satu diantara penyakit menular, bahkan Indonesia menduduki negara terbesar kelima di dunia dalam masalah ini. Deteksi penyakit TB dilakukan melalui gejala klinis, uji laboratorium dan foto thoraks (paru-paru) dengan sinar-x. Penelitian inidilakukan untuk mengetahui histogram dan nilai rerata sekala keabuan citra thoraks pasien yang menderitaTB dan yang bukan. Dengan mengetahui nilai histogram dan nilai rerata sekala keabuan ini nantinya dapat dijadikan petunjuk tambahan bagi tenaga medis untuk menegakkan diagnosa, yaitu untuk menentukan apakah pasien menderita TB atau tidak. Dalam riset ini, eksposi dilakukan pada tegangan tabung 55 kV, arus tabung 200 mA dan waktu 0,08 S, serta menggunakan Computed Radiography (CR). Analisis histogram dilakukan pada Region Of Interest (ROI) yaitu pada daerah apeks paru dan lobus superior paru yang terdapat bercak-bercak kesuraman pada citra thoraks. Dari penelitian diperoleh bahwa histogram citra pasien penderita TB bergeser ke sebelah kanan atau mempunyai nilai skala keabuan piksel yang lebih tinggi (lebih cerah). Nilai rata-rata skala keabuan piksel citra pasien yang menderita TB sebesar 136,3 dan tidak menderita TB sebesar 61,6.Kata kunci: pencitraan thoraks, Tuberculosis, histogram
Evaluasi Ketebalan Irisan (Slice Thickness) pada Pesawat CT-Scan Single Slice Makmur, I Wayan Ari; Setiabudi, Wahyu; Anam, Choirul
JURNAL SAINS DAN MATEMATIKA Volume 21 Issue 2 Year 2013
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Abstract

An evaluation of the value of the slice thickness due to changes in tube voltage and tube current on the CT scan have been performed. The evaluation is done by making images using CT performance test phantom. Testing is done by performing three scanning on each slice. Exposure factors used were 120 kVp-60 mA, 160 mA 120-kVp, 140-kVp 60 mA, and 140 kVp 160 mA. Nominal beam width were 2 mm, 3 mm, 5 mm, 7 mm, and 10 mm. Once the axial image was obtained (on the area for slice thickness determination),  then calculated the average CT number on the region of interest (ROI). After it was made graphs to determine the value of FWHM which indicates the magnitude of the thickness of the slice. From the test results obtained that changes in tube voltage and tube current does not affect the value of the thickness of the slice. Also found that the value of slice thickness for each thickness, greater than the nominal beam width.   Keywords: Phantom CT Performance Test, Slice Thickness, CT-Scan    Telah dilakukan evaluasi terhadap nilai slice thickness terhadap perubahan tegangan tabung dan arus tabung pada pesawat CT scan. Pengujian dilakukan dengan membuat citra menggunakan fantom CT performance test. Pengujian dilakukan dengan melakukan eksposi sebanyak tiga kali pada tiap-tiap slice. Faktor eksposi yang digunakan yaitu 120 kVp-60 mA, 120 kVp-160 mA, 140 kVp-60 mA, dan 140 kVp-160 mA. Slice thickness yang diuji adalah ketebalan 2 mm, 3 mm, 5 mm, 7 mm, dan 10 mm. Setelah didapatkan citra aksial pada bagian daerah uji slice thickness, maka diambil beberapa lokasi ROI dan dihitung rerata CT Number, kemudian nilai tersebut dibuat grafik dan ditentukan nilai FWHM yang menunjukkan besarnya slice thickness. Dari hasil pengujian diketahui perubahan tegangan tabung dan arus tabung tidak berpengaruh terhadap nilai slice thickness. Hasil pengukuran diketahui bahwa nilai slice thickness untuk masing-masing ketebalan, lebih besar dibanding nominal beam width. Kata kunci : Simulasi Monte Carlo, Percentage Depht Dose (PDD), Dose Profile, Inhomogenitas Jaringan.
Correction of 2D Isodose Curve on the Sloping Surface using Tissue Air Ratio (TAR) Method Nuzula, Nurul Firdausi; Adi, Kusworo; Anam, Choirul
JURNAL SAINS DAN MATEMATIKA Volume 23 Issue 3 Year 2015
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Abstract

The curve of 2D isodose is used to determine the dose distribution in patient treated by radiotherapy. Therefore, isodose curve is very useful for planning and evaluating of the dose received by the patient. Correction of 2D isodose curve for sloping surface is very important due to the skin of patient is not flat. In this study, the correction of isodose curve was calculated using tissue air ratio (TAR) method for radiation field size of 10x10 cm2. The correction factor was obtained by comparison of TAR value for effective depth and TAR value for total depth. The correction factor then was multiplied to isodose curve for flat surface. In this study, the software for calculating the automated correction factor due to sloping of patient surface has been successfully developed. It was found that if the sloping of patient surface increases then the corrected isodose curve increases. Key wods: 2D isodose curve, tissue air ratio (TAR), correction factor, sloping patient surface.
Analisis Perubahan Kurva Percentage Depth Dose (PDD) dan Dose Profile untuk Radiasi Foton 6MV pada Fantom Thoraks Prasetyo, Nur Dwi; Setiabudi, Wahyu; Anam, Choirul
JURNAL SAINS DAN MATEMATIKA Volume 20 Issue 4 Year 2012
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Abstract

The study of thickness variation of the soft tissue in the wall of thoracic phantom to the shifting of Percentage Depht Dose (PDD) curve and Dose Profile have been done by using Monte Carlo Simulation. The linac head was designed using BEAMnrc software, whereas modeling of water and thoracic phantom using DOSXYZnrc software. The field size of beam radiation 10 x10 cm2 and the distance of source to  phantom surface (SSD) 100 cm. The water phantom in cubic shape with a size  40x40x40 cm3. The thoracic phantom was designed in cubic shape, with the compositions: soft tissue, bone and lung. The thickness of the soft tissue in the wall of throcic phantom was varied 1-5 cm. This variation shows the thickness layer of the wall of the real patients. The results of comparation between monte carlo simulation and the  actual measurement, show that 6 MV photon delivered by linac at Kensaras Hospital Semarang was generated using energy electron about  5.7 MeV. The variation of soft tissue thickness change  the PDD curve and the dose profile curve. The variation of soft tissue thickness change the dose in the lung (depth 10 cm)  at about 3,84% - 5,59%   Keywords: Monte Carlo Simulation, Percentage Depht Dose (PDD), Dose profle, Tissue inhomogeneity    Telah dilakukan studi pengaruh ketebalan jaringanlunak pada fantom thoraks terhadap perubahan bentuk kurva  Percentage Depht Dose (PDD) dan Dose Profile untuk berkas foton energi 6MV menggunakan Simulasi Monte Carlo. Pembuatan model treatment head linac dilakukan menggunakan program BEAMnrc, sedang permodelan fantom air maupun fantom thoraks menggunakan DOSXYZnrc. Luas lapangan yang digunakan 10x10 cm2, dengan source to skin distance (SSD) sebesar 100 cm. Fantom air didesain berukuran 40x40x40 cm3. Fantom thoraks didesain berbentuk kubus dengan komposisi jaringan lunak, tulang, dan paru-paru. Jaringan lunak bagian depan (asterior) divariasi ketebalannya 1-5 cm. Variasi ini menggambarkan ketebalan jaringan lunak dinding thoraks pasien. Hasil perbandingan antara simulasi dan pengukuran menunjukan bahwa foton 6 MV yang dihasilkan pesawat linac RS Kensaras Semarang menggunakan energi elektron pembangkit mendekati 5,7 MeV. Variasi ketebalan jaringan lunak pada dinding fantom thoraks memberikan perubahan kurva PDD dan juga kurva profil dosis. Variasi ketebalan jaringan lunak tersebut mengubah besarnya dosis pada paru-paru (pada kedalaman 10 cm) sebesar 3,84% - 5,59% Kata kunci : Simulasi Monte Carlo, Percentage Depht Dose (PDD), Dose Profile, Inhomogenitas Jaringan.
Co-Authors - Basyirun A.A. Ketut Agung Cahyawan W Achmad Helmy Djawahir Adi Pamungkas Aditya, Wahyu Yoga Agung, Fikri Mudzakki Syam Ahadiyah, Naeli Ni'matin Ahmad Zainudin Ahmad, Karyoto Al Farobi, Mohammad Alan Tanjung Aji Prastowo Alfian Rizani Alfiana Alfiana Alhamid, Mohammad Zamakhsari Ali, Mohd Hanafi Alindra, Bagoes Malik Amalia, Laili Amilia, Riska Amirul Mukminin Ana Amiroh Anak Agung Gede Sugianthara Andika, Febri Dwi Andri Febrianto, Andri Andy Rachman Andy Suryowinoto Annisa Tenri Maya Anugrah Ariyani S. Ariefin, Mesra Surya Ariij Naufal Armanu Thoyib Aulia, Febriana Nur Awalizan, Mochamad Sigit Awwalin, Aufi Rizqiatul Azhar Azhar Aziz Nugroho Azraini, Dinda Basito Basito, Basito Betri Arisa Bramada Winiar Putra Cahyo Indarto Catur Edi Widodo Conoras, Moch El Bahar Daffafauzan, Daffafauzan Damayanti, Elok Darmawan, Bayu Sigit Dayanti, Putri Rahma Dewi A. Insiano Dewi Dewandari, Dewi Dewi Tri Nugraheni, Dewi Tri Diaguna, Ridwan Dian Eka Kusumawati Dougherty, Geoff Dwi Siwi Retnoningsih Efendi, Muhammad Yusuf Efendi, Nur Mahfud Eka Putra, Ricky Eko Hidayanto Eko Sulistijono Elvira Rizqi Widyanti Emi Widiyanti Emmy Hamidah Erita Yuliasesti Diah Sari Erlyna Wida R, Erlyna Wida Erlyna Wida Riptanti Esti Widowati, Esti Evi Handriani Bertua Simamora Evi Setiawati Fadilah, Mega Fianita Faiza, Nadia Mayla Fakhrur Rozi, Nanang Farhatin Nurul Ihya Fatichin, Khusnul Fatkhiyatul Athiqoh Fauzia Puspa Lestari Firmansyah, Riza Agung Firnanda, Rony Freddy Haryanto Freddy Haryanto Fuad, Ali Geoff Dougherty Geoff Dougherty Geoff Dougherty Gusti Ngurah Sutapa Hananur Rohiem, Nasyith Handayani, Heni Yuli Handini Devi Yunitasari Hanif Rani Iswari Hardiyanti, Yati Harini Harini Harsono Harsono Herfan, Mohammad Heri Pratikto Heri Susanto Heri Sutanto Heri Sutanto Hermawan, Akbar Hidayatullah, Fajar Hima, Mulk HMS Chandra Kusuma Huda, M Masrur I Wayan Ari Makmur Idam Arif Idam Arif Ilafi, Rasi Insani, Auralia Fikri Intan Andriani istiqomah istiqomah Iva Khoiril Mala Jamal Jamal Jamhari Jamhari Japeri Japeri Jujun Septiadi K Sofjan Firdausi K. Sofjan Firdausi Khadafi, Shah khusnul khotimah Kliwon Hidayat Kristiyono, Antonius Edy Kusworo Adi Laksono, Bagus Yudit Leksono, Sonny Lestari, Fauzia Puspa Luh Putu Ratna Sundari M IRFAN, M Mahendra, Alief Thufail Mahfudz Fauzan Maman Herman Mariyatul Qibtiyah Masdi Masdi Masfufiah, Ilmiatul Maulania, Raudya Zahra Moch. Junaidi Hidayat Mohammad Haekal Mohd Hanafi Ali Mubarok, M. Rifqi Much Azam Muchammad Kurniawan Muhammad Farhan Muhammad Khumaedi Muhammad Nur Muharom, Syahri Mukhtar Hanafi Munawir Munawir Nafisah, Thohirotun Natih, Made Naradhara Ayuko Naufal, Ariij Nazil Ainurrofik Nira Radita Nopendri Nopendri Nugraha, Larasadi Harya Nugroho Agung, Nugroho Nur Dwi Prasetyo Nur Paramita Nira Mulyono Nurul Firdausi Nuzula, Nurul Firdausi Oktafiana, Brina Oktavia, Armida Patria Uman Putra, Novian Permana, Rizal Bagus Prabowo, Rizkianto Prasetyo, Indra Prawoto, Agus Priharto, Muria Ilham Priyono Priyono Priyono, Setyo Puput Khusnaiatul Purwoto, Septyaningrum Putri Putri, Maulidia Qonita, Qonita Rahmawati, Widiya Raji, Moh. Ramadan, Arief Dian Rena Widita Rena Widita Rika Fitriani Rinaldi, Ade Rizky Riris Trima Derita Sari Riska Amilia Rizalnur Firdaus Rokhim, Ahmad Abdur Romadhon Romadhon Ryan Kurniawan Sabiliat, Nur Edy Sabiliat, Nur Edy Salim, Ach. Khafid Salsabila, Sagita Samponu, Yohakim Benedictus Samponu, Yohakim Benedictus Sanggam Ramantisan Saptaria, Lina Saragih, Jhon Hadearon Sari, Devi Nur Mayang Sari, Virda Nawang Septyan, Mamat Setiawan, Agus Saleh Setyawati, Rohmah Cahya Eka Setyowati Setyowati Sirojudin Sirojudin Siti A&#039;isyah Siti Maesaroh Siti Nur Endahyani Slamet Riyanto Sofyan, Misba Maulana Sri Adikadarsih, Sri SRI RAHAYU Subari Subari Sugiyanto - Sulistyowati Sulistyowati, Riny Sumariyah Sumariyah Suminah, - SURVIVAL - - Suryono Suryono Sutikno, Bambang Sutrisno, Sutrisno Syafitri, Diva Kaila Syah, Iwan Nur Dian Syahrorini, Syamsudduha Syaifudin, Ahmad Bahron Syaikhuddin, Muhammad Miftakhul Takatoshi Toyoda Tampubolon, Bahroin Idris Tamrin Fathoni Titiek Suheta Toshioh Fujibuchi Tri Winarni Agustini Tri Wulan Tjiptono Trisna Budiwati Tuffahati, Andira Shafa Tunggul Drajat Mulatomo Vincensius Gunawan S.K. Virgia Ningrum Fatnar, Virgia Ningrum VITA FIBRIYANI, VITA Wahyu Edy Wibowo, Wahyu Edy Wahyu S. Budi Wahyu Setia Budi Wati, Sulistyowati Sulis Widi, Sayekti Nugrahaning Yanto, Dwi Yanurita Dwihapsari, Yanurita Yati Hardiyanti Yoel Midel Leitabun Yunianti, Nina Yunus Abu Bakar, M. Yusuf HR, Mohammad Zaenal Arifin Zaenul Muhlisin Zakaria, Moch. Bagus