A Simple Measurement Method for Verifying the Accuracy of the Displayed Dose on an Over-couch-type X-ray Fluoroscopic System
The purpose of this study was to establish a simple measurement method to verify the accuracy of incident air kerma (Ka, r) and air kerma area product (PKA) displayed on an over-couch-type X-ray fluoroscopy system. A dosimeter was located at the patient entrance reference point, and the irradiation field size was set to 10×10 cm. A lead plate was placed on the couchtop to protect the image receptor, and the duration of fluoroscopy was set to 1 min. The Ka, r was measured with the proposed method and the Japanese Industrial Standards (JIS) method on three X-ray fluoroscopy units of different manufactures. The effect of backscattered X-rays from the lead plate was calculated using Monte Carlo methods. The errors of the displayed Ka, r and PKA to the measured Ka, r and PKA with our proposed method were calculated. There was no significant difference in the measured Ka, r between the proposed method and the JIS method in all units. The effect of backscattered X-ray was ≤0.5%. The errors of displayed Ka, r and PKA to those measured were in the range of 3.4 to 15.7% and -4.1 to 20.3%, respectively, which met the tolerance for accuracy of ±35% in accordance with the JIS method. We found that our proposed method was simple and that the accuracy of measured values was comparable to that of the JIS method.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:77 |
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| Enthalten in: |
Nihon Hoshasen Gijutsu Gakkai zasshi - 77(2021), 10 vom: 02., Seite 1180-1185 |
| Sprache: |
Japanisch |
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| Beteiligte Personen: |
Noto, Kimiya [VerfasserIn] |
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| Links: |
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| Themen: |
Air kerma area product |
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| Anmerkungen: |
Date Completed 22.10.2021 Date Revised 22.10.2021 published: Print Citation Status MEDLINE |
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| doi: |
10.6009/jjrt.2021_JSRT_77.10.1180 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM332111369 |
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| 520 | |a The purpose of this study was to establish a simple measurement method to verify the accuracy of incident air kerma (Ka, r) and air kerma area product (PKA) displayed on an over-couch-type X-ray fluoroscopy system. A dosimeter was located at the patient entrance reference point, and the irradiation field size was set to 10×10 cm. A lead plate was placed on the couchtop to protect the image receptor, and the duration of fluoroscopy was set to 1 min. The Ka, r was measured with the proposed method and the Japanese Industrial Standards (JIS) method on three X-ray fluoroscopy units of different manufactures. The effect of backscattered X-rays from the lead plate was calculated using Monte Carlo methods. The errors of the displayed Ka, r and PKA to the measured Ka, r and PKA with our proposed method were calculated. There was no significant difference in the measured Ka, r between the proposed method and the JIS method in all units. The effect of backscattered X-ray was ≤0.5%. The errors of displayed Ka, r and PKA to those measured were in the range of 3.4 to 15.7% and -4.1 to 20.3%, respectively, which met the tolerance for accuracy of ±35% in accordance with the JIS method. We found that our proposed method was simple and that the accuracy of measured values was comparable to that of the JIS method | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a air kerma area product | |
| 650 | 4 | |a incident air kerma | |
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| 700 | 1 | |a Segawa, Keiko |e verfasserin |4 aut | |
| 700 | 1 | |a Yoshikawa, Ryo |e verfasserin |4 aut | |
| 700 | 1 | |a Moribe, Riku |e verfasserin |4 aut | |
| 700 | 1 | |a Kojima, Hironori |e verfasserin |4 aut | |
| 700 | 1 | |a Matsubara, Kosuke |e verfasserin |4 aut | |
| 700 | 1 | |a Takemura, Akihiro |e verfasserin |4 aut | |
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