Isfahan University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Determination of the Weighted Computed Tomography Dose Index in Coronary Multidetector Computed Tomography Angiography



Tavakoli MB1 ; Faraji R1 ; Sajjadieh A2 ; Jafari S1
Authors
Show Affiliations
Authors Affiliations
  1. 1. Department of Medical Physics and Engineering, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Cardiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Journal of Isfahan Medical School Published:2016

Abstract

Background: Multislice computed tomography (CT) angiography is a robust imaging method for noninvasive assessment of coronary artery diseases, which is associated with high radiation dose. Having knowledge of the various parameters used to estimate the dose plays an important role in increasing the understanding of dose delivered to patients and help operators and technologist to reduce the dose. In this research, the amounts of Weighted Computed Tomography Dose Index (CTDIW) for coronary CT angiography exams were measured in Isfahan city, Iran. Methods: To calculate the dose, an ionization chamber (Piranha, X-ray Analyzer, RTI Electronics and Sweden) and acrylic body phantom were used. Common conditions of coronary CT angiography used in two centers were applied for this project. Finally, CTDIW of all the scans were calculated using the related formulation. Findings: The amount of mean CTDIW for calcium score exams in Sina and Alzahra hospitals were 0.468 ± 0.190 and 2.354 ± 0.610 mGy, respectively (P = 0.007); and for coronary CT angiography scans in Sina and Alzahra hospitals were 6.221 ± 1.290 and 5.299 ± 0.840 mGy, respectively (P = 0.860). Conclusion: CTDIW for the calcium score was significantly different in the two centers, but there was not significant difference in the two centers for coronary CT angiography scans. In this study, the amount of CTDIW was much lower than the measured in other centers. Since scan parameters have an important effect on the dose value, training and precision of technologist result in dose reduction and patient radiation protection. © 2016, Isfahan University of Medical Sciences(IUMS). All rights reserved.
Related Docs
View other Related Docs
1. Assessment of Effective Dose Associated With Coronary Computed Tomography Angiography in Isfahan Province, Iran, Journal of Medical Signals and Sensors (2018)
2. Comparing the Absorbed Doses by Skin, Thyroid, and Eyes in Ct Coronary Angiography and Conventional Angiography, Journal of Isfahan Medical School (2011)
3. Investigating the Effects of the Kv Assist Technique on Image Quality and the Reduction of Effective Dose and Carcinogenic Risk of Coronary Computed Tomography Angiography, Journal of Isfahan Medical School (2021)
4. Coronary Ct Angiography by Modifying Tube Voltage and Contrast Medium Concentration: Evaluation of Image Quality and Radiation Dose, Echocardiography (2019)
5. Evaluation of Image Quality and Radiation Dose in Low Tube Voltage Coronary Computed Tomography Angiography, ARYA Atherosclerosis (2019)
6. Su‐E‐I‐51: Investigation of Absorbed Dose to the Skin, Eyes and Thyroid of Patients During Ct Angiography and Comparison With Conventional Angiography, Medical Physics (2012)
7. Organ Doses, Effective Dose, and Cancer Risk From Coronary Ct Angiography Examinations, American Journal of Roentgenology (2020)
8. Dose Assessment in Multidetector Computed Tomography (Ct) of Polymethylmethacrylate (Pmma) Phantom Using American Association of Physicists in Medicine-Task Group Report No. 111 (Aapm-Tg111), Journal of Isfahan Medical School (2017)
Experts (# of related papers)
View all Related Experts
Maryam Moradi (11)
Ali Chaparian (10)
Other Related Docs
9. Diagnostic Performance of 64-Row Coronary Ct Angiography in Detecting Significant Stenosis As Compared With Conventional Invasive Coronary Angiography, ARYA Atherosclerosis (2013)
10. The Value of Coronary Computed Tomography Angiography in Patients With a High Calcium Score, Journal of Tehran University Heart Center (2023)
11. Prognostic Value of Normal and Non-Obstructive Coronary Artery Disease Based on Ct Angiography Findings. a 12 Month Follow up Study, Journal of Cardiovascular and Thoracic Research (2019)
12. Value of Coronary Artery Calcium Scoring in Iranian Patients Suspected to Coronary Artery Disease, Acta Medica Iranica (2015)
13. Conventional and Spiral Ct Dose Indices in Yazd General Hospitals, Iran, Iranian Journal of Radiation Research (2006)
14. Patient Dose Resulting From Ct Examinations in Yazd, Iran, Iranian Journal of Radiation Research (2006)
15. First Macro Monte Carlo Based Commercial Dose Calculation Module for Electron Beam Treatment Planning - New Issues for Clinical Consideration, Physics in Medicine and Biology (2006)
16. Prognostic Value of Coronary Artery Calcium Score for Determination of Presence and Severity of Coronary Artery Disease, Polish Journal of Radiology (2017)
17. Comparative Assessment of the Influences of Iterative Model Reconstruction (Imr) and Hybrid-Iterative Reconstruction (Hir) on Image Quality of 256-Slice Coronary Computed Tomography Angiography, Journal of Isfahan Medical School (2020)
18. The Five-Year Trend of Coronary Artery Diseases Based on Angiography Results in Central Part of Iran, Iranian Heart Journal (2012)
19. Assessment of Patients Skin Dose Undergoing Coronary Angiography and Percutaneous Transluminal Coronary Angioplasty (Ptca), Iranian Journal of Radiation Research (2010)
20. Determination of Uterus Absorbed Dose by Patients Following Myocardial Perfusion Scan Using Tld and Conjugate View Methods, Journal of Biomedical Physics and Engineering (2019)
21. Entrance Surface Dose Measurements for Routine X-Ray Examinations in Chaharmahal and Bakhtiari Hospitals, Iranian Journal of Radiation Research (2006)
22. Evaluation of Received Radiation Rate in Patients With Trauma Hospitalized in Isfahan City, Iran, Journal of Isfahan Medical School (2019)
23. Evaluating the Justification of Computed Tomography (Ct) Scan Requests to Reduce the Risk of Radiation-Induced Cancers, Journal of Isfahan Medical School (2018)
24. The Correlation Between Coronary Artery Calcium Score With Diagnosis of Angina Pectoris in Patients With and Without Metabolic Syndrome, Candidates for Coronary Angiography; [ارتباط ًورُی کلسین شریاى کرًٍر در بیواراى با ٍ بذٍى سٌذرم هتابَلیک با تشخیص آًژیي صذری کاًذیذسیتی آًژیَگرافی کرًٍری], Journal of Isfahan Medical School (2022)
25. Radiation Dose and Risk of Exposure-Induced Death Associated With Chest Ct Examination During Covid-19 Outbreak, Radioprotection (2023)
26. Diagnostic Reference Levels (Drls) for Routine X-Ray Examinations in Lorestan Province, Iran, International Journal of Radiation Research (2015)
27. Influences of Adaptive Statistical Iterative Reconstruction on Image Quality and Dose Reduction in Coronary Computed Tomography Angiography, Journal of Isfahan Medical School (2017)
28. Coronary Artery Calcification—Does It Predict the Cad-Rads Category?, Emergency Radiology (2022)
29. Pragmatic Approaches to Reducing Radiation Dose in Brain Computed Tomography Scan Using Scan Parameter Modification, Journal of Medical Signals and Sensors (2022)
30. The Relationship of Coronary Heart Disease and Valvular Heart Disease in Patients With Stable Angina, Journal of Isfahan Medical School (2017)
31. Survey of Ct Radiation Doses and Iodinated Contrast Medium Administration: An International Multicentric Study, European Radiology (2024)
32. Prevalence of Carotid Artery Calcification Detected on Panoramic Radiographs of Patients With a History of Hypertension or Myocardial Infarction, Open Dentistry Journal (2019)
33. Estimating Risk of Exposure Induced Cancer Death in Patients Undergoing Computed Tomography Pulmonary Angiography, Radioprotection (2017)
34. Comparison of Clinical and Angiographic Findings Between Stable Angina Patients With and Without Coronary Tortuosity, Journal of Isfahan Medical School (2012)
35. Evaluation of Absorbed Dose From Common Radiology Examinations in Yasuj, Iran Using Experimental Measurement and Monte Carlo Calculations, Journal of Isfahan Medical School (2016)
36. Audit and Quality Assessment of National Persian Registry of Cardiovascular Disease(N-Prove) in Terms of Comorbidities, Angiography, and Angioplasty Characteristics in Iran, ARYA Atherosclerosis (2024)
37. Evaluation of the Relationship Between the Characteristics and Dimensions of Calcified Plaques and Coronary Artery Stenosis in Patients Undergoing Coronary Computed Tomography Angiography, Iranian Journal of Radiology (2023)
38. Children, Ct Scan and Radiation, International Journal of Preventive Medicine (2010)
39. Survey of Coronary Catheterization Laboratory Activity in Iran During the Coronavirus Disease-2019 Pandemic, ARYA Atherosclerosis (2021)
40. Evaluation of Thoracic Extracardiac Findings in Patients Undergoing Multidetector Computed Tomography Coronary Angiography in Alzahra Hospital, Isfahan, Iran, During 2014-2015, Journal of Isfahan Medical School (2017)
41. Clinical Characteristics, Management and 1-Year Outcomes of Patients With Acute Coronary Syndrome in Iran: The Iranian Project for Assessment of Coronary Events 2 (Ipace2), BMJ Open (2015)
42. Assessment of Entrance Surface Dose and Health Risk From Common Radiology Examinations in Iran, Radiation Protection Dosimetry (2013)
43. Evaluation of Image Quality, Organ Dose, Effective Dose and Cancer Risk in Pediatric Chest Ct Procedure, Journal of Isfahan Medical School (2023)
44. Measurement of Ipsilateral Lung and Heart Dose in Radiotherapy of Left Sided Mastectomy Patients in Common Different Clinical Techniques: A Phantom Study, International Journal of Radiation Research (2018)
45. Evaluation of Radiographers' and Ct Technologists' Knowledge Regarding Ct Exposure Parameters, Polish Journal of Medical Physics and Engineering (2019)
46. Diagnostic Value of Intraluminal Stent Enhancement in Estimating Coronary In-Stent Restenosis, Journal of Clinical Imaging Science (2020)
47. Coronary Artery Calcification Score As the Determinant of Coronary Artery Disease in Chronic Kidney Disease Patients: A Preliminary Study, ARYA Atherosclerosis (2024)
48. Comparison of Nuclear-Medicine-Technologist Absorb Dose in Myocardial Perfusion Scan Between Responsible for Injection and Imaging, Journal of Isfahan Medical School (2016)
49. Investigation of Dose Distributions of Computed Tomography With Cylindrical Polymethyl Methacrylate (Pmma) Phantoms, Journal of Isfahan Medical School (2015)
50. The Influence of Cardiac Function on Coronary Arterial Enhancement at Coronary Computed Tomography Angiography: A Cross-Sectional Study, Journal of Research in Medical Sciences (2016)