15% kVp Rule Effect on CR Exposure Index: An Initial Phantom Study
Corresponding Author(s) : I Putu Eka Juliantara
ekaj.atro@gmail.com
International Journal of Allied Medical Sciences and Clinical Research,
Vol. 10 No. 1 (2022): 2022 Volume - 10 Issue - 1
Abstract
In using the Computed Radiography (CR), radiographers usually carry out abdomen examinations with different exposure factors without any definite reference or standard, by setting higher kV and higher mAs. Without realizing it, this will certainly affect the Exposure Index as a dose indicator indirectly on Computer Radiography. It is necessary to have an appropriate standard for calculating the exposure factor to control the Exposure Index value in order to produce Exposure Index / within a safe range. This research was conducted using descriptive quantitative methods at the Bali ATRO Laboratory which was conducted in April 2020. The sample in this study was a water phantom which is equivalent to the abdominal organs of a normal person. From the results of research and data analysis, it can be concluded that in First variation 1 with 77 kV and 8 mAs show 332.4 average exposure index, in the second variation with 89 kV and 4 mAs, the average exposure index was 313.6, and the third variation with 65 kV and 16 obtained 335.6 average exposure index. From the results obtained, it allows flexibility in the use of combinations of exposure factors as needed. 15% increased kVp variation can be used for taking action on non-cooperative patients which can help minimize unsharpness and repetition caused by patient movement. 15% reduced kVp is good for extremities and certain examinations that require optimal detail.
Keywords
Exposure Factor
Exposure Index
Computed Radiography
Water Phantom
15% kVp Technique
1.
I Putu Eka Juliantara, Putu Arlik Purwaniti, Putu Irma Wulandari, Putu Rita Jeniyanthi. 15% kVp Rule Effect on CR Exposure Index: An Initial Phantom Study . Int. J. of Allied Med. Sci. and Clin. Res. [Internet]. 2022 Apr. 18 [cited 2025 Nov. 19];10(1):120-4. Available from: https://ijamscr.com/ijamscr/article/view/1165
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References
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References
1. Baker M. Investigation into factors influencing Fuji S-value using an extremity phantom. J Med Imaging Radiat Sci. 2012;43(1):34-7. doi: 10.1016/j.jmir.2011.08.002, PMID 31052017.
2. Merdiwani R. Analisis Perbandingan Hasil Radiografi dari Pemeriksaan Schedel Lateral dengan Menggunakan Grid Ratio 8:1 Dan Grid Ratio 6:1; 2018.
3. Musdalifah. IJEScA IJEScA; 2018. p. 5-14.
4. Sartinah. Variasi Nilai Eksposi Aturan 15 Persen pada Radiografi Menggunakan Imaging Plate untuk Mendapatkan Kontras Tertinggi. Berk Fis. 2008;11(2):45-52.
5. Robson. Role of plain abdominal radiography in the initial investigation of suspected intussusception. 2013.
6. Kawamura T, Naito S, Okano K, Yamada M. Improvement in image quality and workflow of X-ray examinations using a new image processing method. Virtual grid technology no. 60, pp. 21-7, 2015.
7. Seeram E, Davidson R, Bushong S, Swan H. Optimizing the exposure indicator as a dose management strategy in computed radiography. Radiol Technol. 2016;87(4):380-91. PMID 26952062.
8. Laasamana GA. ’Pengaruh Penggunaan kV Tinggi Terhadap Dosis Radiasi dan Kualitas Gambar Radiografi Pada Pemeriksaan Lumbal Lateral Dengan Menggunakan Grid,’ Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Hasanuddin Makassar; 2018.
9. Widhyasari R. Pengaruh aturan 15 % kVp Pada computed radiography terhadap signal-to-noise ratio di Laboratorium ATRO Bali, ATRO Bali; 2017.
2. Merdiwani R. Analisis Perbandingan Hasil Radiografi dari Pemeriksaan Schedel Lateral dengan Menggunakan Grid Ratio 8:1 Dan Grid Ratio 6:1; 2018.
3. Musdalifah. IJEScA IJEScA; 2018. p. 5-14.
4. Sartinah. Variasi Nilai Eksposi Aturan 15 Persen pada Radiografi Menggunakan Imaging Plate untuk Mendapatkan Kontras Tertinggi. Berk Fis. 2008;11(2):45-52.
5. Robson. Role of plain abdominal radiography in the initial investigation of suspected intussusception. 2013.
6. Kawamura T, Naito S, Okano K, Yamada M. Improvement in image quality and workflow of X-ray examinations using a new image processing method. Virtual grid technology no. 60, pp. 21-7, 2015.
7. Seeram E, Davidson R, Bushong S, Swan H. Optimizing the exposure indicator as a dose management strategy in computed radiography. Radiol Technol. 2016;87(4):380-91. PMID 26952062.
8. Laasamana GA. ’Pengaruh Penggunaan kV Tinggi Terhadap Dosis Radiasi dan Kualitas Gambar Radiografi Pada Pemeriksaan Lumbal Lateral Dengan Menggunakan Grid,’ Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Hasanuddin Makassar; 2018.
9. Widhyasari R. Pengaruh aturan 15 % kVp Pada computed radiography terhadap signal-to-noise ratio di Laboratorium ATRO Bali, ATRO Bali; 2017.