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Measuring Organ Doses and Assessing Clinical Image Quality for the Purpose of Computed Tomography Protocol Optimization
Başlık:
Measuring Organ Doses and Assessing Clinical Image Quality for the Purpose of Computed Tomography Protocol Optimization
Yazar:
Lipnharski, Izabella L., author.
ISBN:
9780438120839
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (265 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-11(E), Section: B.
Özet:
The rapid technological development of CT imaging has resulted in a continuing expansion of CT examinations. Due to the radiation dose delivered by CT, it is important to ensure that the required diagnostic information is achieved with minimum dose to the patient. Methods were created to systematically assess clinical image quality within our radiology department. Various CT examination protocols, including pediatric body, pediatric head, adults with metal implants, and lung cancer screening, were investigated for potential dose reduction using eleven cadavers scanned on a clinical 320-detector CT scanner. Dose reduction was achieved by increasing the image noise acceptance level, as well as utilizing tube current modulation, iterative reconstruction, and organ shields. Subjective image quality was assessed using a task-based approach, scoring various clinically-relevant quality criteria on a three-point-scale to identify low-dose studies with acceptable image quality. Organ doses were directly measured to quantify organ dose savings achieved from modern technologies. Results showed that exam indications investigated in this work had room for dose reduction while maintaining diagnostic image quality. Furthermore, it was clear that diagnostic image quality varies depending on the indication, and examination protocols should be optimized on an individual basis.
Notlar:
School code: 0070
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(696613.1) | 696613-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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