Optimum screen-film systems for high-speed rotational panoramic radiography
نویسندگان
چکیده
منابع مشابه
General Screen Film Radiography and Its Limitations
X-rays are electromagnetic (EM) radiation with characteristics of short wavelengths, very high frequencies and very high energy. High energy EM radiation exhibits characteristics of both waves and discrete bundles of energy called photons. X-ray photon energy is usually measured in kilo-electron volts (keV) and diagnostic x-ray energies are typically 10 to 150 keV. Such high energy EM radiation...
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The location and field size of the incident X-ray beam in panoramic dental radiography cannot be ascertained visually most of the time. However, these parameters are needed for quality control and dosimetry determination. To alleviate this problem, we tested GafChromic XR-QA film on two panoramic systems. For each system, we used the length of a cross-sectional image of the incident beam and th...
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Traditional film-screen radiography (FSR) has been useful in the recognition and evaluation of interstitial lung diseases, but is becoming increasingly obsolete. To evaluate the applicability of storage phosphor digital computed radiography (CR) images in the recognition of small lung opacities, we compared image quality and the profusion of small opacities between FSR and CR radiographs. We sc...
متن کاملQuality 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 کاملUsing GafChromic film to estimate the effective dose from dental cone beam CT and panoramic radiography.
OBJECTIVES To demonstrate the feasibility of GafChromic(®) XR-QA2 (ISP Corp., Wayne, NJ) as a dosemeter when performing measurements of the effective dose from three cone beam CT (CBCT) units and to compare the doses from examinations of three common dental clinical situations. A second aim was to compare the radiation doses for three digital panoramic units with the doses for the CBCT units. ...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1996
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00001354898