Analisis Pengaruh Kuat Arus dan Tegangan Terhadap Kualitas Citra Computed Tomography (CT) Scan Siemens Perspective di RSUP Dr. M. Djamil Padang

Authors

  • Sri Herlinda Jurusan Fisika FMIPA Universitas Andalas
  • Dian Fitriyani Jurusan Fisika FMIPA Universitas Andalas
  • Marzuki Marzuki Jurusan Fisika FMIPA Universitas Andalas

DOI:

https://doi.org/10.26418/positron.v9i1.31138

Keywords:

CT Scan, kuat arus, noise, tegangan, uniformity, RSUP Dr. M. Djamil

Abstract

Telah dilakukan analisis pengaruh kuat arus dan tegangan terhadap kualitas citra Computed Tomography (CT) Scan menggunakan phantom Siemens berbentuk silinder dengan metode pengambilan citra secara pemindaian axial.   Variasi tegangan tabung yang digunakan adalah 80 kV, 110 kV dan 130 kV, untuk kuat arus 240 mA, 260 mA, 280 mA, 300 mA, 320 mA dan 340 mA dengan waktu pemindaian 1 detik.   Setiap metode pemindaian untuk satu tegangan dilakukan dengan enam kali penyinaran.   Penyinaran dilakukan pada dua keadaan yaitu pada tegangan tetap, nilai kuat arus yang divariasikan dan untuk variasi tegangan dilakukan pada nilai kuat arus yang tetap, dengan menggunakan ketebalan irisan 8 mm dengan kernel J30s.   Hasil penelitian menunjukkan bahwa kenaikan tegangan tabung diikuti oleh dan penurunan nilai noise dan kenaikan nilai uniformity . Selain itu, variasi penambahan arus tabung akan menurunkan nilai  noise dan menurunkan nilai uniformity.   Nilai noise yang paling optimal berada pada tegangan 110 kVp dan 130 kVp, sedangkan nilai uniformity yang paling optimal berada pada tegangan 80 kVp dengan kuat arus 300 mAs dan 340 mAs.

References

BAPETEN, Peraturan Kepala Badan Pengawas Tenaga Nuklir Nomor 9 Tahun 2011 Tentang Uji Kesesuaian Pesawat Sinar-X Radiologi Diagnostik dan Intervensional, 2011.

Bushberg, J. T., Seibert, J. A., Leidholdt, E. M., Bonne, J. M., The essential physics of medical imaging, third edition, Lippincott Williams & Wilkins, Philadelphia, 2012.

Ibraheem, U. M., The value of spiral computed tomography in the diagnosis of facial fractures, MJOTU, 1(141), pp.76-81, 2008.

Ledenius, K., Gustavsson, M., Johansson, S., Stalhammar F., Wiklund, L. M., Thilander, K. A., Effect of tube current on diagnostic image quality in paediatric cerebral multidetector CT images, Br. J. Radiol., 82(976), pp. 313-320, 2009.

International Commission on Radiological Protection (ICRP), Recommendations of the International Commission on Radiological Protection, ICRP publication 60 Oxford, Pergamon, 2007.

Sohaib, S. A., Peppercorn, P. D., Horrocks, J. A., Keene, M. H., Kenyon, G. S. and Reznek, R. H., The effect of decreasing mAs on image quality and patient dose in sinus CT, Br. J. Radiol., 74(878), pp. 157–161, 2001.

Mourão A. P., Gonçalves Jr R. G. and Alonso T. C, Dose profile variation with pitch in head CT scans using gafchromic films, Recent Advances in Biomedical & Chemical Engineering and Materials Science, pp. 51-54, 2011.

Karlsson, H., Development and evaluation of a new detector and software for measurements of CT dose profile, CTDI and CT tube current variation, Department of Radiation Physics Gothenburg University, Sweden, 2004.

Podgorsak E. B., Radiation oncology physics: a handbook for teacher and student, IAEA, Vienna, 2003.

Jaengsri, N.,CT Protocol, Radiology Departement Of Takshin Hospital, Bangkok, 2000.

Downloads

Additional Files

Published

2019-05-31

Issue

Vol. 9 No. 1 (2019): May Edition

Section

Articles

License

Authors who publish with this journal agree to the following terms:

  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.