Neuroradiologic Applications with Routine C-arm Flat Panel Detector CT: Evaluation of Patient Dose Measurements
| العنوان: | Neuroradiologic Applications with Routine C-arm Flat Panel Detector CT: Evaluation of Patient Dose Measurements |
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| المؤلفون: | Yiannis Kyriakou, Arnd Dörfler, Willi A. Kalender, Gregor Richter |
| المصدر: | AJNR Am J Neuroradiol |
| بيانات النشر: | American Society of Neuroradiology (ASNR), 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | medicine.medical_specialty, Scanner, Patients, Dose profile, Radiation Dosage, Flat panel, Flat panel detector, Germany, medicine, Humans, X-Ray Intensifying Screens, Radiology, Nuclear Medicine and imaging, Radiometry, Interventional, medicine.diagnostic_test, business.industry, Digital subtraction angiography, Reference values, Neuroradiography, Body Burden, Patient dose, Neurology (clinical), Radiology, Tomography, X-Ray Computed, Nuclear medicine, business, Relative Biological Effectiveness, Exposure data |
| الوصف: | BACKGROUND AND PURPOSE: Since the introduction of flat panel detector–equipped C-arms, the use of flat panel detector CT (FPCT) in the neuroradiologic angiography suite has become more frequent. This examination implicates its own specific radiation exposure. We used the CT dose index (CTDI) concept and adapted it to the special FPCT geometry to provide a consistent comparison with multisection head CT (cCT). MATERIALS AND METHODS: Exposure data obtained for routine scanning during a period of 1 year were used to assess a specific dose of a total of 217 rotational scans performed in 105 patients. One hundred seventy-two scans were 3D digital subtraction angiography (DSA) scans. There were 45 scans that were performed to achieve high-quality, soft-tissue resolution. Dose measurements in cylindrical polymethylmethacrylate (PMMA) phantoms were used to determine the CTDI value and to compare it with the reference values for cCT. In addition, the dose-area product (DAP) was registered and correlated with the CTDI and corresponding dose-length product (DLP) values. Exposure data and dose values were compared with cCT. RESULTS: Mean-weighted CTDI value of 3D-DSA was approximately 9 mGy per scan. High-quality, soft-tissue resolution FPCT scans, comparable with cCT, revealed a mean dose value of 75 mGy (reference value for cCT, CTDI w ∼ 60 mGy). CONCLUSION: The high-speed scans used for 3D-DSA revealed a significantly lower CTDI w and DLP compared with clinical CT. The high-quality FPCT protocol resulted in a higher dose and should therefore be limited to acute cases, when patient transfer to a CT scanner is considered to be a disadvantage for patient management. |
| تدمد: | 1936-959X 0195-6108 |
| DOI: | 10.3174/ajnr.a1237 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bdab036b34e7048eb5d08a79bcda904 https://doi.org/10.3174/ajnr.a1237 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....7bdab036b34e7048eb5d08a79bcda904 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1936959X 01956108 |
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| DOI: | 10.3174/ajnr.a1237 |