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الرئيسية > Ultrasound Spectral Doppler Qu...>الوصف

Ultrasound Spectral Doppler Quality Assurance Accuracy

المصدر: مجلة العلوم الإنسانية والتطبيقية
الناشر: الجامعة الأسمرية الإسلامية زليتن - كليتى الآداب والعلوم
المؤلف الرئيسي: Ben Halim, Mohamed R. (Author)
مؤلفين آخرين: Helan, Bashier M. (Co-Author), Elwar, Aeyad M. (Co-Author)
المجلد/العدد: ع21
محكمة: نعم
الدولة: ليبيا
التاريخ الميلادي: 2012
الصفحات: 29 - 47
رقم MD: 829110
نوع المحتوى: بحوث ومقالات
قواعد المعلومات: HumanIndex
مواضيع:
الموجات فوق الصوتية | قياسات دوبلر | القياسات الروتينية | قياسات ضمان الجودة
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المستخلص: This paper describes the procedure and examines the validity of carrying out routine measurements of Doppler velocity measurements as part of a routine QA procedure. The assessment was done by analyzing a sample of the data of 3 years spar of the field measurements we obtained. The method of carrying out quality assurance measurements is described. In addition to confirming the accuracy in measurement calibration, Doppler mode measurements were carried out on a String phantom. This is done by using five ultrasound machines and three transducers to look at the errors that arise in the practical aspects of carrying out these testes under laboratory conditions. The experiment tested velocity (i.e., slow; medium and fast). The data was obtained and analyzed by calculating the mean and standard deviation of measured values, also the mean difference between expected and measured values was calculated as well.The result of the Doppler measurements also demonstrates that the technique is valid with good agreement over a range of velocities. Higher velocities giving slightly larger errors. However all errors for Doppler were well within the requirement of clinical use of Doppler velocity information. It would be reasonable to expect that the technique should pick up real changes of more than 1 % providing certain precautions were taken. In particular auditing individual testers over a period of time to help improve an individual’s technique, each tester always using the same phantom.

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