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2004年ct和三维成像学术年会

作者： LIU Ji-ren ZHENG Quan-lu (Neusoft Digital Medical Systems CO.,LTD.Shenyang 110179,China)

Muti-slice based ct scanners are being recognized as the most advanced diagnostic equipments nowadays,theirtechnologies have been innovating & developing tremendously with the badly needs from the *** Group made the 8technical breakthrough and innovation and successfully developed the 8-slice based ct scanner with its independent intellectualproperty right on the basis of those of the 1

关键词： Multi-slice ct scanner X-ray Data-collection Dose

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Construction of a computational MDct model for simulations of the detector signals

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Radiation Medicine and Protection 2023年第1期4卷 48-53页

作者： Chuyan Wang Xin Lin Hongming Liu Jianwei Fu Weihai Zhuo Haikuan Liu Institute of Radiation Medicine Fudan UniversityShanghai 200032China Shanghai United Imaging Healthcare Co. LtdShanghai 201816China

Objective:To develop a computational model of a multi-detector ct scanner(MDct),which could be used to simulate the signal of each detector element in the MDct by using the Monte Carlo ***:The ct scanner was modelled,including the X-ray source,the bowtie filter,the collimator,the couch and the detector *** a general scanning condition,the signal in each detector element was simulated based on the model by using the MCNPX *** the energy spectra at different tube voltages and energy deposition in the detector panel at different collimations were simulated to test the robustness of the MDct model built in this ***,the simulated signals in each detector element were compared with their recorded *** accuracies were evaluated by the relative root mean square error(RRMSE)and the structural similarity(SSIM)for each detector element and the whole detector panel,***:The simulated energy spectra before and after passing through the phantom and simulated energy deposition in the detector panel were *** the scan range from the apex of lung to pubic symphysis,the RRMSE of the 18 axial projections ranged from 0.02 to 0.17,with an average of *** the SSIMs were calculated to be 0.979 and 0.976 for projections with the largest peak signal and the smallest peak signal,***:The computational model of the MDct developed in this study is accurate and successful,it is helpful for further accurate simulations of the radiation dose and image quality of the MDct.

关键词： ct scanner Computational model Monte Carlo simulation Detector signal

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Adult Presentation of a Complete Second Branchial Cleft Fistula Diagnosed by US and ct, Autosomal Dominant Transmission in Three Members of the Family: Case Report

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Open Journal of Medical Imaging 2020年第2期10卷 125-131页

作者： Patrick Mailleux Yorick Lismonde Department of Imaging Clinique St Luc Bouge Belgium

Branchial arch anomalies can arise from the four first branchial arches, but the most encountered cases are from the second one. Second branchial arch cysts and abscesses occur mainly in older children or young adults while fistulae are discovered in young children. We report a case of complete second branchial arch fistula of Bailey III type with adult complaints of painful swelling and local reddishness followed by spontaneous discharge and disappearance of complaints. Diagnosis was based on ultrasound and confirmed by ct scan, with the classic “beak sign” visible on both exams. Three cases were encountered in the family, with no otologic or kidney symptoms, which is quite different from the classical branchiootorenal syndrome which associates severe inner ear and kidney congenital anomalies.

关键词： Branchial Cyst Branchial Arc Fistula ct scanner Ultrasound

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