Chirath Dasanayaka

Mr. Chirath Dasanayaka

orcid

Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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26 August 2020 in Computer Methods in Biomechanics and Biomedical Engineering: Imaging & Visualization
Verified
Journal Article
Closed access
CDChirath Dasanayaka
Chirath Dasanayaka
Maheshi B. DissanayakeMaheshi B. Dissanayake
Maheshi B. Dissanayake
Tuberculosis (TB) is a contagious bacterial airborne disease, and is one of the top 10 causes of death worldwide. According to the World Health Organisation, around 1.8 billion people are infected with TB and 1.6 million deaths were reported in 2018. More importantly, 95% of cases and deaths were from developing countries. Yet, TB is a completely curable disease through early diagnosis. To achieve this goal one of the key requirements is efficient utilisation of existing diagnostic technologies, among which chest X-ray is the first line of diagnostic tool used for screening for active TB. The presented deep learning pipeline consists of three different modern deep learning architectures, to generate, segment, and classify lung X-rays. Apart from this, image preprocessing, image augmentation, genetic algorithm based hyper parameter tuning, and model ensembling were used to improve the diagnostic process. We were able to achieve classification accuracy of 97.1% (Youden’s index-0.941, sensitivity of 97.9%, specificity of 96.2%) which is a considerable improvement compared to the existing work in the literature. In our work, we present a highly accurate, automated TB screening system using chest X-rays, which would be helpful especially for low income countries with low access to qualified medical professionals.

17 March 2025 in Applied System Innovation
Verified
Journal Article
Open access
PDF file
CDChirath Dasanayaka
Chirath Dasanayaka
KDKanishka Dandeniya
Kanishka Dandeniya
Maheshi B. DissanayakeMaheshi B. Dissanayake
Maheshi B. Dissanayake
CGChandira Gunasena
Chandira Gunasena
RJRuwan Jayasinghe
Ruwan Jayasinghe
Access to high-quality dental healthcare remains a challenge in many countries due to limited resources, lack of trained professionals, and time-consuming report generation tasks. An intelligent clinical decision support system (ICDSS), which can make informed decisions based on past data, is an innovative solution to address these shortcomings while improving continuous patient support in dental healthcare. This study proposes a viable solution with the aid of multimodal artificial intelligence (AI) and large language models (LLMs), focusing on their application for generating orthopantomography radiology reports and answering questions in the dental domain. This work also discusses efficient adaptation methods of LLMs for specific language and application domains. The proposed system primarily consists of a Blip-2-based caption generator tuned on DPT images followed by a Llama 3 8B based LLM for radiology report generation. The performance of the entire system is evaluated in two ways. The diagnostic performance of the system achieved an overall accuracy of 81.3%, with specific detection rates of 87.9% for dental caries, 89.7% for impacted teeth, 88% for bone loss, and 81.8% for periapical lesions. Subjective evaluation of AI-generated radiology reports by certified dental professionals demonstrates an overall accuracy score of 7.5 out of 10. In addition, the proposed solution includes a question-answering platform in the native Sinhala language, alongside the English language, designed to function as a chatbot for dental-related queries. We hope that this platform will eventually bridge the gap between dental services and patients, created due to a lack of human resources. Overall, our proposed solution creates new opportunities for LLMs in healthcare by introducing a robust end-to-end system for the automated generation of dental radiology reports and enhancing patient interaction and awareness.

1 December 2019
Verified
Conference Paper
Closed access
CDChirath Dasanayaka
Chirath Dasanayaka
BDBhasitha Dharmasena
Bhasitha Dharmasena
WBWikum Roshan Bandara
Wikum Roshan Bandara
Maheshi B. DissanayakeMaheshi B. Dissanayake
Maheshi B. Dissanayake
RJRuwan Jayasinghe
Ruwan Jayasinghe
Locating the Mental Foramen is a crucial aspect in Anesthetics. Inability of accurate locating of MF could lead to complications, therefore the use of a computer assisted techniques to accomplish this task is worth examining. The paper presents the successfulness of implementing a U-Net deep convolutional neural network (DCNN) for Dental Panoramic Tomography (DPT) images which was able to achieve mean dice coefficients of 98.7%.

27 September 2026
Verified
Conference Paper
Open access
KDKanishka Dandeniya
Kanishka Dandeniya
CDChirath Dasanayaka
Chirath Dasanayaka
DSDaswin De Silva
Daswin De Silva
SSSam Saltis
Sam Saltis
SJShalinka Jayatilleke
Shalinka Jayatilleke
HMHarsha Kumara Moraliyage
Harsha Kumara Moraliyage