The ASEAN Journal of Radiology <p><strong>General Information</strong><br />The ASEAN Journal of Radiology (ASEAN-JR), an official journal of ASEAN association of Radiology (AAR), publishes articles pertaining to the clinical imaging, therapy, and basic science of the radiology, radiation therapy, medical physics and related educational, socioeconomic and medicolegal issue in ASEAN regions and worldwide. The content of the ASEAN-JR is determined by the Editors.<br /><br />ISSN: 0859-144X (Print)<br />ISSN: 2672-9393 (Online)</p> Foundation of Ophan and Rare Lung Disease (FORD) en-US The ASEAN Journal of Radiology 0859-144X <p><span class="fontstyle0"><strong>Disclosure Forms and Copyright Agreements</strong><br></span><span class="fontstyle2">All authors listed on the manuscript must complete both the electronic copyright agreement. (in the case of acceptance)</span></p> The Royal College of Radiologists of Thailand in collaboration with Thailand Center of Excellence in Life Sciences shape the future of artificial intelligence in diagnostic radiology Sitthichok Chaichulee Thammasin Ingviya Supharerk Thawillarp Pattarawin Attasara Wiwatana Tanomkiat Copyright (c) 2021 The ASEAN Journal of Radiology 2021-04-30 2021-04-30 22 1 55 61 10.46475/aseanjr.v22i1.126 Mimicker of Fitz-Hugh-Curtis syndrome: A case report of perihepatitis secondary to sigmoid colonic perforation <p>Perihepatitis is an uncommon condition defined as the inflammation of the peritoneal liver capsule. It is more commonly known as Fitz-Hugh-Curtis syndrome, a rare condition characterized by the inflammation of the peritoneum and tissue around the liver. This syndrome is usually associated with pelvic inflammatory disease (PID). However, PID is not always the cause of perihepatitis. We reported a rare case of perihepatitis which occurs secondarily to sigmoid colonic perforation.</p> Sirote Wongwaisayawan Pinporn Jenjitranant Natthawut Jarunnarumol Goragoch Gesprasert Nitima Saksobhavivat Copyright (c) 2021 The ASEAN Journal of Radiology 2021-04-30 2021-04-30 22 1 35 43 10.46475/aseanjr.v22i1.123 Pulmonary sclerosing pneumocytoma, an adenocarcinoma mimicker: a case report and review of the literature. <p>Pulmonary sclerosing pneumocytoma (PSP) is a rare condition, occupying only approximately 1% of all benign lung neoplasms and the description of this disease through a radiological perspective is limited. Only approximately a third of PSP has been correctly diagnosed pre-operatively through contrast-enhanced computed tomography (CECT) thorax. To date, only few radiological features have been described to ascertain this disease and there is still a significant portion of patients being misdiagnosed with a malignant neoplasm. We report a case of PSP that was initially misdiagnosed as lung adenocarcinoma stage IIA and the histopathological findings of surgical resection confirmed the diagnosis of PSP. We try to add some points from this case into the previous radiological description of this uncommon disease with a common presentation.</p> Mohd Zulkimi Roslly Aida Widure Mustapha Mohd Mustapha Nik Farhan Nik Fuad Copyright (c) 2021 The ASEAN Journal of Radiology 2021-04-30 2021-04-30 22 1 44 54 10.46475/aseanjr.v22i1.120 The third COVID-19 wave in Thailand Wiwatana Tanomkiat Copyright (c) 2021 The ASEAN Journal of Radiology 2021-04-30 2021-04-30 22 1 03 04 10.46475/aseanjr.v22i1.125 Abdominal CT radiation dose reduction at Siriraj Hospital (Phase III) <p><strong>OBJECTIVE</strong><strong>:</strong> To compare the image quality and the radiation dose between fixed tube current (FTC) low dose abdominal CT currently performed at our hospital and new automatic tube current modulation (ATCM) low dose abdominal CT.</p> <p> </p> <p><strong>MATERIALS AND METHODS</strong><strong>: </strong>We prospectively performed ATCM low dose abdominal CT in 88 participants who had prior FTC low dose CT for comparison. Four experienced abdominal radiologists independently and blindly assessed the quality of FTC and ATCM low dose CT images by using a 5-point-scale satisfaction score (1 = unacceptable, 2 = poor, 3 = average, 4 = good, and 5 = excellent image quality). Each reader selected the preferred image set between FTC and ATCM low dose techniques for each participant. The image noise of the liver and the aorta in both techniques was measured. The volume CT dose index (CTDI<sub>vol</sub>) of both techniques was compared.</p> <p><strong> </strong></p> <p><strong>RESULTS</strong><strong>:</strong> The mean satisfaction scores (SD) for FTC and ATCM low dose CT were 4.38 (0.66) and 4.38 (0.64), respectively with the ranges of 3 to 5 in both techniques, which were all acceptable for CT interpretation. The preferred image set between FTC and ATCM low dose techniques of each participant randomly selected by each reader were varied, depending on the readers’ opinions. The mean image noise of the aorta on FTC and ATCM low dose CT accounted for 34.75 and 36.46, respectively, while the mean image noise of the liver was 28.86 and 29.81, respectively. The mean CTDI<sub>vol</sub> (SD) of FTC and ATCM low dose CT were 8.42 (0.32) and 8.12 (0.43) mGy, respectively. </p> <p><strong> </strong></p> <p><strong>CONCLUSION</strong><strong>: </strong>FTC and ATCM low dose abdominal CT provided comparable acceptable image quality and showed no clinical significance in radiation dose optimization.</p> <p><strong> </strong></p> Piyaporn Apisarnthanarak Anawat Sriwaleephun Sastrawut Thammakittiphan Wimonrat Lornimitdee Atchariya Klinhom Tarntip Suwatananonthakij Kobkun Muangsomboon Wanwarang Teerasamit Sopa Pongpornsup Walailak Chaiyasoot Copyright (c) 2021 The ASEAN Journal of Radiology 2021-04-30 2021-04-30 22 1 5 19 10.46475/aseanjr.v22i1.82 Comparison of entrance surface air kerma measurement with MTS-N (LiF: Mg, Ti) chips with a kilovoltage X-ray source <p><strong>Objective:</strong> Radiation detectors are key components that ensure the accuracy and performances of dosimetry equipment. The study is aimed to compare the mean entrance surface air kerma (ESAK) between a DCT-10mm ionization chamber (IC) and MTS-N (LiF: Mg, Ti) chips when both detectors are exposed to ≤ 5mGy with a 10 by 10 field size, with an X-ray source and to determine the accuracy of the Thermoluminescent (TL) chips. Also, the dose will be compared to similar studies.</p> <p><strong>Materials and Methods:</strong> A functional, Digital Radiography (DR) X-ray System was used. A DCT-10mm ionization chamber (IC) and an XR Multidetector was positioned at a Source to Image Distance (SID) of 100cm on polystyrene, about 20cm thick. An X-ray spectrum generated at a Practical Peak Voltage (PPV) of 60-107kV with Half Value Layer (HVL) of 2.4-4.3mmAl and filtration &gt; 3mmAl was used. The same setup was used for the MTS-N chips.</p> <p><strong>Results:</strong> The mean doses for 1-5 mGy with the MTS-N chips were 1.07±0.07, 1.60±0.13, 2.23±0.11, 2.58±0.07 and 3.45±0.10 mGy respectively, with accuracies of 7, 20, 26, 36 and 31%. Dose accuracy at 1and 2mGy was within 25% respectively. Dose accuracies at 3, 4 and 5mGy was within &gt;25%. The correction factor for 1-5mGy was 0.94, 1.25, 1.35, 1.55 and 1.45 respectively.</p> <p><strong>Conclusion:</strong> Validation of the MTS-N chips with the reference ionization chamber to this study was within 36%. The Radiation and Nuclear Safety Authority (STUK) recommends that ESAK be within 25% for entrance surface dose. ESAK accuracy mostly increased with dose as observed in this study.</p> Akintayo Daniel Omojola Samuel Olaolu Adeneye Michael Onoriode Akpochafor Isiaka Olusola Akala Azuka Anthonio Agboje Copyright (c) 2021 The ASEAN Journal of Radiology 2021-04-30 2021-04-30 22 1 20 34 10.46475/aseanjr.v22i1.96