نتایج جستجو برای: x ray ct

تعداد نتایج: 753974  

2018
M.D. Badusha Ramanjula Reddy Konathala Phani Kumar Satyasri

Musculoskeletal tuberculosis is the commonest form of extrapulmonary tuberculosis however Rib lesion is uncommon and occurs in zero to five percent of bone and joint tuberculosis. In our case report both chest X ray and CT were useful in demonstrating the skeletal lesion and also in the assessment of response to treatment, as follow up chest X ray and CT scan at 4 months and after 12 months of ...

Journal: :Journal of Physics: Conference Series 2004

Journal: :Measurement Science and Technology 2016

Journal: :Medical physics 2017
Eunhee Kang Junhong Min Jong Chul Ye

PURPOSE Due to the potential risk of inducing cancer, radiation exposure by X-ray CT devices should be reduced for routine patient scanning. However, in low-dose X-ray CT, severe artifacts typically occur due to photon starvation, beam hardening, and other causes, all of which decrease the reliability of the diagnosis. Thus, a high-quality reconstruction method from low-dose X-ray CT data has b...

Journal: :journal of paramedical sciences 0
mojtaba navvabpour department of radiation technology paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran mohammad navvabpour material engineering faculty, tehran university, tehran, iran mohammad ghane-e dehkordi medical radiation sciences faculty , shahid beheshti university of medical sciences, tehran, iran hossein nazari moghadam radiation technalogy sciences faculty , radiation technology department paramedical sciences , shahid beheshti university of medical sciences, tehran, iran seyed mohammad reza aazami department of radiation technology, 5 department of radiation technology,paramedical sciences faculty, shahid beheshti university of medical sciences, tehran, iran

the output of x-ray, especially in the field of required energy for diagnosing the disease is very low (in diagnosing lamps, it is less than 1%). in this kind of lamps the rest of the electrical energy is transformed to heat. this considerable amount of heat induces a myriad of too many limitations in choosing higher levels of radiation, particularly in specialized techniques. this process is t...

Journal: :Dental materials journal 2010
Masayuki Kamegawa Masayuki Nakamura Yu Fukui Sadami Tsutsumi Masaki Hojo

Three-dimensional computer models of dental arches play a significant role in prosthetic dentistry. The microfocus X-ray CT scanner has the advantage of capturing precise 3D shapes of deep fossa, and we propose a new method of measuring the three-dimensional morphology of a dental impression directly, which will eliminate the conversion process to dental casts. Measurement precision and accurac...

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