Radiation doses of indirect and direct digital cephalometric radiography
نویسندگان
چکیده
منابع مشابه
Quality comparison of direct digital panoramic radiography and computed radiography panoramic
BACKGROUND AND AIM: Digital panoramic X-ray images can be captured using photostimulable phosphors or solid-state detectors (i.e. charge-coupled devices and Flat-Panels). The first category is defined as computed radiography (CR) or semi-direct radiography. The second technology that uses solid-state detectors is known as direct digital radiography (DDR). Both of these technologies have their o...
متن کاملOrgan doses and subjective image quality of indirect digital panoramic radiography.
OBJECTIVES To determine if slight variations in exposure will affect diagnostic image quality and absorbed radiation doses for digital and analogue panoramic radiography. METHODS Thermoluminescent dosimeters were placed in the thyroid gland, eyes, submandibular glands, parotid glands and skin of two human cadaver heads. Three different exposure settings were used: 70 kV, 120 mAs; 77 kV, 75 mA...
متن کاملAbsorbed doses for patients undergoing panoramic radiography, cephalometric radiography and CBCT.
OBJECTIVES Contemporary dental radiology offers a wide spectrum of imaging methods but it also contributes to an increase in the participation of dental radiological diagnosis in the patient's exposure to ionizing radiation. The aim of this study is to determine the absorbed doses of the brain, spinal column, thyroid and eye lens for patients during panoramic radiography, cephalometric radiogra...
متن کاملRadiation Effects on Digital Radiography
In the moment of any given imaging task and thus over the lifetime of a detector, the deposition of certain amount of radiation dose in an electronic pixel element is inevitable. This radiation effect can give rise to a change of the pixel-element characteristics such as the leakage current of a photodiode and the threshold voltage of thin-film transistors (TFTs) [1], and which may consequently...
متن کاملAn experimental comparison of detector performance for direct and indirect digital radiography systems.
Current flat-panel detectors either directly convert x-ray energy to electronic charge or use indirect conversion with an intermediate optical process. The purpose of this work was to compare direct and indirect detectors in terms of their modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE). Measurements were made on three flat-panel detectors,...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: British Dental Journal
سال: 2004
ISSN: 0007-0610,1476-5373
DOI: 10.1038/sj.bdj.4811532