Department of Nuclear Science: Recent submissions

Now showing items 1-20 of 24

Evaluating the Impact Exposure Parameters Have on Automatic Tube Current Modulation in a CT Scanner

Hishaam, U.; Jeyasugiththan, J.; Satharasinghe, D. M.; Senanayake, G.; Kumarihami, A. M. C.; Ranaweera, G.; Costa, M.; Pallewatte, A. S.; Peterson, S. (Asia‑Oceania Federation of Organizations (AFOMP) Congress, 2022)

Background or Introduction: ATCM reduces dose by adapting tube current to maintain a specified target image quality throughout CT scans and across patients of varying sizes. Scanners modulate current differently: angularly ...
Current Status of Education, Training and Professional Role of Medical Physicists in South-Asia Region

Akhtaruzzaman, M.; Joan, M.; Jeyasugiththan, J.; Poudel, S.; Ibrahimi, S.; Magendran, R.; Naqvi, M.; Azhari, H. A.; Zakaria, G. A. (Asia‑Oceania Federation of Organizations (AFOMP) Congress, 2022)

Introduction: For quality cancer treatment, a multidisciplinary team is required where medical Physicists play an essential role in imaging, radiation protection, treatment planning and quality assurance (QA). Medical ...
Establishment of Institutional Diagnostic Reference Levels (DRLs) for Computed Tomography in National Hospital of Sri Lanka

Hettiarachchi, K. S.; Jeyasugiththan, J.; Pallewatte, A. S. (University of Colombo, 2022)

The institutional DRLs for the National Hospital of Sri Lanka were established by considering the most frequent computed tomography (CT) examination performed by three CT units in the Department of Radiology. CT dose volume ...
Noise, Dose and Pitch Relationship in Non-Cardiac Multi-Detector Row Computed Tomography (MDCT) Scanner

Mayuran, I.; Jeyasugiththan, J.; Satharasinghe, D. M. (University of Colombo, 2022)

Among diagnostic radiological procedures, a CT study should use relatively higher exposure while still meeting the image quality needs of the exam. Radiation professionals can adjust the patient's dose by manipulating the ...
Dosimetric Comparison of Intensity Modulated Radiation Therapy and Volumetric Modulated Arc Therapy for Treatments of Thyroid Cancer

Banneheka, B. M. A. T.; Jeyasugiththan, J.; Kumara, K. V. A. W. (University of Colombo, 2022)

This study aims to compare volumetric modulated arc therapy (VMAT) treatment techniques against intensity modulated radiation therapy (IMRT). Planning target volume coverage, doses to the organs at risk, dose to the normal ...
Wireless, Portable, Intelligent and Real Time Cardiac Arrhythmia and Patients’ Vital Signs Monitoring System

Dasanayaka, K. A. H. M.; Jeyasugiththan, J.; Herath, S. (University of Colombo, 2022)

This study describes the development of a wireless, portable, intelligent, and real-time cardiac arrhythmia and patients' vital signs monitoring system that could sense the irregular heartbeat rate and how it has been ...
Evaluation of Entrance Surface Dose (ESD) for Chest, lumbar Spine and Abdomen Xray Procedures in a Selected Hospital in Sri Lanka

Ehalagasthanna, G. P. N. T.; Satharasinghe, D. M.; Hishaam, U. N.; Jeyasugiththan, Jeyasingam (University of Colombo, 2021)

Ionizing radiation is harmful to living beings because it can break apart biologically important molecules such as DNA. Therefore, it is important to enforce radiation protection where radiation is used in medical diagnosis ...
Validation of Geant4 Monte Carlo Model of 60Co High Dose Rate BEBIG Brachytherapy Source

Jayakody, M.; Jeyasugiththan, J.; Chougule, A. (University of Colombo, 2021)

The 60Co sources are widely used for high dose rate (HDR) brachytherapy treatments. The purpose of this study is to validate a Geant4 (version10.7.1) computational model of the BEBIG 60Co HDR source. The Geant4 Monte ...
Computed Tomography Dose Reference Levels for head, chest and abdomen regions: A nationwide survey

Amalaraj, T; Satharasinghe, DM; Pallewatte, AS; Jeyasugiththan, Jeyasingam (The 21st Asia-Oceania Congress of Medical Physics (AOCMP -2021), 2021)

Introduction: The computed tomography (CT) is identified as the highest contributor of the population radiation dose among medical radiation examinations. Therefore, routine monitoring of the delivered radiation dose is ...
Influence Of The Average Adult Definition On International DRL Comparison And Optimization

Satharasinghe, DM; Wanninayake, WMNMB; Pallewatte, AS; Jeyasugiththan, Jeyasingam (The 21st Asia-Oceania Congress of Medical Physics (AOCMP -2021), 2021)

Introduction: The diagnostic reference levels (DRL) can be used to identify the appropriate level of exposure for a given X-ray procedure. The DRL also defined per standard patient or phantom to limit the effect of patient ...
Optimizing Image Noise as a means to improve Computed Tomography ATCM in Sri Lanka

Hishaam, H; Jeyasugiththan, Jeyasingam; Pallewatte, AS; Peterson, S (The 21st Asia-Oceania Congress of Medical Physics (AOCMP -2021), 2021)

The use of automatic tube current modulation (ATCM) during CT scans has become widely popular over the past few years. This method significantly reduces patient dose by adapting the tube current during a CT scan to produce ...
Evaluation of Entrance Surface Dose (ESD) for Chest, Lumbar Spine and Abdomen X-ray Procedures in a Selected Hospital in Sri Lanka

Ehalagasthanna, G. P. N. T; Satharasinghe, D.M; Hishaam, U.N; Jeyasugiththan, Jeyasingam (Faculty of Science, University of Colombo, Sri Lanka, 2021)

Ionizing radiation is harmful to living beings because it can break apart biologically important molecules such as DNA. Therefore, it is important to enforce radiation protection where radiation is used in medical diagnosis ...
Effective Radiation Doses for Head and Neck Multi-Slice Computed Tomography (MSCT) Protocols

Karunarathna, Sanjaya; Satharasinghe, D.M; Hishaam, Urshella; Pallewatte, Aruna; Jeyasugiththan, Jeyasingam (Faculty of Science, University of Colombo, Sri Lanka, 2021)

Computed tomography (CT) is known as a standard imaging modality prescribed for head and neck diagnostic imaging. The introduction of multi-detector row CT (MDCT) has enabled imaging of the entire neck region within 2-4 ...
Validation of Geant4 Monte Carlo Model of 60Co High Dose Rate BEBIG Brachytherapy Source

Jayakody, M; Jeyasugiththan, Jeyasingam; Chougule, Arun (Faculty of Science, University of Colombo, Sri Lanka, 2021)

The 60Co sources are widely used for high dose rate (HDR) brachytherapy treatments. The purpose of this study is to validate a Geant4 (version10.7.1) computational model of the BEBIG 60Co HDR source. The Geant4 Monte Carlo ...
Estimation of Effective Radiation Dose in 16 Slice Computed Tomography Neck Examination

Gunawardhana, Harshana; Mallikaarachchi, Asanka; Viswakula, Sameera; Jeyasugiththan, Jeyasingam (Faculty of Science, University of Colombo, Sri Lanka, 2021)

Computed Tomography (CT) is the most essential imaging technique and widely used in various diagnostic radiological and interventional procedures in Sri Lanka. Because of the increased demand for CT imaging procedures, ...
Radioactivity of sand in the coastal strip from Beruwala to Dondra, Sri Lanka

Bandara, Muditha S; Mahawatte, Palee (Sri Lanka Association for the Advancement of Science, 2013)

All living beings on earth are continuously exposed to radiation from primordial radio nuclides 232Th, 238U and 40K present in soils and sands. Due to their long half lives these radionuclide remain in soils and sands for ...
Transfer of natural radionuclides from soil to Centella asiatica, a medicinal plant grown in Colombo district, Sri Lanka

Chandrasiri, M.R.D.A; Kumari, Peshala; Bandara, Muditha S; Lamabadusuriya, Manuja (27th FAOBMB Conference and 44th Annual Conference of MSBMB, Malaysia, 2019)

Natural radionuclides are taken up by the herbs from the environment and are accumulated in varied concentrations in different parts of the plant. Therefore, it is considered as a type of contaminant in herbal medicines, ...
Gender-wise Variation in the Delivered Radiation Dose during Common X-ray Procedures. A Preliminary Study

Satharasinghe, DM; Wanninayake, WMNMB; Pallewatte, AS; Jeyasugiththan, J (General Sir John Kotelawala Defence University, KDU, 2021)

The increased radiosensitivity in women compared to men is a greater concern in diagnostic radiology, which uses ionization radiation for the purpose of diagnosis. However, radiation protection authorities, such as the ...
Facility reference level for common x-ray procedures: A preliminary study

Satharasinghe, DM; Jeyasugiththan, J; Pallewatte, AS; Wanninayake, WMNMB (Asia-Oceania Congress of Medical Physics (AOCMP), 2020)

Ionizing radiation is an essential tool in medical diagnosis and it brings great benefit to the patient. However, the associated risks due to the radiation are unavoidable. Therefore, close monitoring of radiation exposure ...
Facility reference level for common x-ray procedures: A preliminary study

Satharasinghe, DM; Jeyasugiththan, J; Pallewatte, AS; Wanninayake, WMNMB (Asia-Oceania Congress of Medical Physics (AOCMP), 2020)

Ionizing radiation is an essential tool in medical diagnosis and it brings great benefit to the patient. However, the associated risks due to the radiation are unavoidable. Therefore, close monitoring of radiation exposure ...

Now showing items 1-20 of 24

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