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All Journal Journal of Educational Innovation and Public Health Catha : Jurnal Penelitian Kreatif dan Inovatif
Made Adhi Mahendrayana
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Pengaruh Variasi Rotation Time Terhadap CTDI (CT Dose Index) dan DLP (Dose Leght Product) Pada Pemeriksaan CT Kepala Non Kontras Gabriel Barreto De Carvalho Belo; Kadek Yuda Astina; Made Adhi Mahendrayana
Journal of Educational Innovation and Public Health Vol. 2 No. 1 (2024): Januari : Journal of Educational Innovation and Public Health
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/innovation.v2i1.2133

Abstract

Background. Non-contrast head CT scans utilizing X-rays are considered the gold standard in emergency units for patients with clinical head injuries. Rotation time is a parameter that influences the radiation dose received by patients. This study aims to evaluate the impact of rotation time on patient radiation doses, emphasizing the ALARA principle. The research findings can assist in optimizing CT scan settings to reduce radiation doses without compromising image quality.. Methods: This quantitative research employs an experimental approach to investigate the influence of rotation time variations on CTDI (CT dose index) and DLP (dose leght product) in non-contrast head CT scans. Results: Calculation of CTDI and DLP values to assess the impact of rotation time variations, using two variations, 1 s and 1.5 s, yielded the following results: CTDI and DLP for 1 s were 20.30 mGy and 239.54 mGycm, respectively, while CTDI and DLP for 1.5 s were 20.43 mGy and 249.26 mGycm. Conclusion: Rotation time variations affect CTDI and DLP values in non-contrast head CT scans, although both values tend to remain stabel. A rotation time of 1 s is considered optimal for CTDI and DLP in non-contrast head CT scans at the Radiology Department of Sunset Vet Kuta Animal Hospital.
Analisa Penerapan Sekuen T1 Spir Dan Sekuen Dwi Pada Pemeriksaan Mri Pelvis Dengan Kontras Pada  Klinis Fistula Perianal Alfian Nur; Made Adhi Mahendrayana; Hendra Setiawan
Catha : Jurnal Penelitian Kreatif dan Inovatif Vol. 2 No. 4 (2025): Oktober
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/catha.v2i4.141

Abstract

Background: Perianal fistula is an anorectal disorder characterized by the formation of an abnormal channel between the anal canal and the perineum due to infection of the anal glands. Pelvic MRI with contrast is the imaging modality of choice because it can depict the fistula tract in detail, show sphincter involvement, and detect abscesses or secondary tracts that are difficult to find with other methods. Method: The research method used was descriptive qualitative with a case study approach to one patient diagnosed with perianal fistula. The examination procedure included patient preparation, intravenous administration of the contrast medium Dotarem, and an MRI sequence protocol comprising T2W_SPAIR, T2W_TSE, pre- and post-contrast T1W_SPIR, and DWI. The examination was performed using a 1.5 Tesla MRI scanner with a fish oil capsule marker (natural) to mark the location of the external fistula.  Results: The imaging results showed an active fistula tract from the internal opening at 5 o'clock direction of the anus to the skin surface without secondary tracts or additional abscesses. In conclusion, pelvic MRI with contrast provides a detailed anatomical picture of the perianal fistula and assists in planning appropriate medical treatment. Keywords: Pelvic MRI, Perianal Fistula, SPIR, DWI, and marker nature
Co-Authors Alfian Nur Gabriel Barreto De Carvalho Belo HENDRA SETIAWAN Kadek Yuda Astina