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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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Journal : Journal of Medical Physics and Biophysics

 1 
Scatter index measurement using a CT dose profiler Choirul Anam; Freddy Haryanto; Rena Widita; Idam Arif; Toshioh Fujibuchi; Takatoshi Toyoda; Geoff Dougherty
Journal of Medical Physics and Biophysics Vol 4, No 1 (2017)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.874 KB)

Abstract

The CT dose index (CTDI) is usually measured using a pencil chamber with a length of 100 mm on a CTDI phantom with a length of 150 mm. The scattering radiation dose beyond 100 mm is usually still significant despite using a small beam width (below 10 mm). This study aims to measure the scattering index of CT dose for several variations of input parameters. The scatter index measurements were performed on a multi-slice CT (MSCT) Alexion™ using a CT dose profiler detector connected to a Black Piranha electrometer (RTI Electronic, Sweden). The measurements used the helical mode and a beam width of 2 x 4 mm, and resulted in 150 mm dose profiles. Values of CTDI150, CTDI130 and CTDI100 were calculated and used to obtain values of the scatter indices (SI130 and SI150). We varied input parameters, such as tube voltage, tube current, and pitch, and used two types of CTDI phantoms, i.e. body and head. In the tube voltage variation (from 80 to 135 kV), we found SI130 and SI150 values of 1.13 ± 0.01 and 1.19 ± 0.01 for the body CTDI phantom; and  SI130 and SI150 values of 1.08 ± 0.01 and 1.11 ± 0.01 for the head CTDI phantom. For tube current variations from 25 to 120 mA, and pitch variations from 0.75 to 1.5, SI130 and SI150 values were 1.14 ± 0.00 and 1.20 ± 0.00 for the body CTDI phantom; and 1.08 ± 0.00 and 1.11 ± 0.00 respectively for the head CTDI phantom. We showed that the more frequently used CTDI100 value is too small because it ignores scattering beyond the 100 mm boundary, even for beam widths less than 10 mm. The scatter index values were strongly influenced by the size of the CTDI phantom, and were slightly affected by the tube voltage. Variations in tube currents and pitch did not affect the value of the scatter index. The scatter index values of SI130 and SI150 were significantly different, and suggests that the use of SI150 is even more appropriate for describing the scattering dose.
Dose Volume Product (DVP) As Descriptor for Estimating Total Energy Imparted to Patient Undergoing CT Examination Choirul Anam; Freddy Haryanto; Rena Widita; Idam Arif; Geoff Dougherty
Journal of Medical Physics and Biophysics Vol 3, No 1 (2016)
Publisher : Indonesian Association of Physicists in Medicine (AIPM/AFISMI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (545.031 KB)

Abstract

The purpose of this study is to expand a descriptor for estimating the total energy imparted to a patient undergoing a CT examination and to investigate its relationship to the currently used descriptor. Estimating the total energy imparted to a patient has previously been characterized by dose length product (DLP). We propose a descriptor which we call the dose volume product (DVP), defined as the product of the size specific-dose estimate (SSDE) and the volume irradiated in the patient (V). We also present algorithm to automate the calculation of DVP. There are several steps in calculating the DVP: the first is to contour the patient automatically, the second is to calculate the area of patient in every single slice, the third is to calculate the volume of the radiated part of the patient, the fourth is to calculate the water equivalent diameter (DW) automatically, the fifth is to calculate the SSDE, and the last is to calculate the DVP. To investigate the effectiveness of the algorithm, we used it on images of phantoms and patients. The results of this study show that the automated calculations of DVP for both body and head phantoms were in good agreement with theoretical calculations. The differences between them were within 2%. DVP and DLP had a linear relationship with R2 = 0.971 (slope 1099 cm2, 95% confidence interval (CI), 1047 to 1157 cm2) and R2 = 0.831 (slope 248.6 cm2: CI, 237.6 to 259.7 cm2), for thorax and head patients respectively.
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'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