Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion
Also available in printed version
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| Format: | Master's thesis |
| Language: | English |
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Universiti Teknologi Malaysia
2025
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| Online Access: | https://utmik.utm.my/handle/123456789/53460 |
| Abstract | Abstract here |
| _version_ | 1854933009491296256 |
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| author | Thomas Feldevert |
| author2 | Eko Supriyanto, supervisor |
| author_facet | Eko Supriyanto, supervisor Thomas Feldevert |
| author_sort | Thomas Feldevert |
| description | Also available in printed version |
| format | Master's thesis |
| id | utm-123456789-53460 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-534602025-08-20T19:56:31Z Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion Thomas Feldevert Eko Supriyanto, supervisor Biosciences and medical engineering Also available in printed version Image fusion for imaging modalities such as computed tomography (CT) and ultrasound play an important role in cardiovascular imaging. However, currently there is no existing phantom suitable for ultrasound and CT imaging equipped with an electrocardiogram (ECG) signal generator. Due to this situation, the existing phantoms cannot use ECG gating techniques often used for imaging modalities such as CT to effectively reduce motion artifacts by taking the images while the heart is not moving during diastole. The project developed a hardware to generate an analog signal as well as software to design a realistic ECG besides synchronizing the ECG signal with the beating of an existing heart phantom. This is a novel approach for testing and verification in in-vitro environments. In this thesis, an ECG signal generator was developed to be used together with an existing heart phantom that has been proven to be suitable for ultrasound and CT investigation. The simulated ECG signal itself was created using MATLAB and the generated file was stored on a microcontroller. This microcontroller inclusive of additional peripheral hardware, most notably a digital-toanalog converter (ADC) and a frequency filter was used to convert digital signal into an analog signal similar to that of a human ECG. In addition, a feedback system from the pump that controls the beating of the phantom to the microcontroller was implemented. This feedback system consists of an infrared (IR) emitter and receiver that detect the state of the pump in real-time to ensure that the beating of the phantom and the ECG signal are synchronised. An ultrasound device was used to simultaneously record the ECG signal and investigate the heart phantom. The recording (n = 46) showed lifelike ECG signal, and the beginning of beating occurred consistently at 20.13 ± 0.47 % of the R wave-to-R wave (R-R) interval. This showed that the phantom was motionless between 66 - 85 % of the R-R interval during which still images are usually obtained using ECG gating techniques. In conclusion, this project has successfully developed the means to test CT and ultrasound image fusion systems that employ ECG gating techniques zulaihi UTM 83 p. Thesis (Sarjana Falsafah) - Universiti Teknologi Malaysia, 2017 2025-03-17T02:02:14Z 2025-03-17T02:02:14Z 2017 Master's thesis https://utmik.utm.my/handle/123456789/53460 vital:107997 valet-20180320-120424 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Biosciences and medical engineering Thomas Feldevert Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion |
| thesis_level |
Master
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| title | Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion |
| title_full | Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion |
| title_fullStr | Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion |
| title_full_unstemmed | Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion |
| title_short | Microcontroller-based ECG signal generator for a dynamic heart phantom for ultrasound-computed tomography fusion |
| title_sort | microcontroller based ecg signal generator for a dynamic heart phantom for ultrasound computed tomography fusion |
| topic | Biosciences and medical engineering |
| url | https://utmik.utm.my/handle/123456789/53460 |
| work_keys_str_mv | AT thomasfeldevert microcontrollerbasedecgsignalgeneratorforadynamicheartphantomforultrasoundcomputedtomographyfusion |