نتایج جستجو برای: x ray
تعداد نتایج: 664718 فیلتر نتایج به سال:
The internal structure of DNA-CTAB and DNA-DDAB is investigated by a Small Angel X- ray Scattering(SAXS) instrument. Hexagonal packing of DNA was observed for DNA complex with CTAB, and for DDABcomplex is observed lamellar structure. Variations in the internal spacing and degree of long-range ordering aredependent on both surfactant type and concentrations of added salt. When we increased the a...
A 16-year-old female with a history of neck hemangioma surgery presented with irritable coughs. A computed tomography scan showed anterosuperior and middle mediastinal masses (Figure 1). The patient underwent surgery and the upper and middle mediastinal lesions were removed (Figure 2A). Pathological examination confirmed that the upper and mid...
Background and Objective: Chest X-ray is usually the first radiography performed for a newborn. This test is easily accessible and yet a basic screening method. Different results have been reported in various studies regarding the diagnostic value of chest X-ray in cardiovascular disease in children. Materials and Methods: The study was carried out retrospectively using the medical files of 100...
Knowing patient exact dose during radiological activities is considered as one of the main principles to decrease radiation-induced dangers which are not really necessary and affect a great deal of people. In this respect, in recent years many extensive studies have been done on types of photodiodes and production of X-ray detectors using semiconductor elements. Since these elements are not ver...
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