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基于FPGA的心臟掃描自動(dòng)管電流調(diào)制控制系統(tǒng)設(shè)計(jì)與分析
2021年電子技術(shù)應(yīng)用第12期
朱 炯,,李 康,,徐亦飛
明峰醫(yī)療系統(tǒng)股份有限公司,,浙江 紹興312000
摘要: 心臟掃描圖形重建是在心臟舒張期階段有效,其余掃描時(shí)段不使用,。因此可采用前瞻式掃描方法來進(jìn)行掃描來降低輻射劑量,,而由于掃面橫切面的不同,可以使用自動(dòng)管電流調(diào)制技術(shù)(Dose of Modulation,,DOM)來進(jìn)一步降低輻射劑量,。自動(dòng)管電流調(diào)制技術(shù)即根據(jù)被掃物體不同角度下橫截面的衰減差異來實(shí)時(shí)調(diào)整管電流的大小,從而提高射線效率來降低輻射劑量,。通過結(jié)合兩者的特點(diǎn),,設(shè)計(jì)一種類前瞻式心臟掃描自動(dòng)管電流調(diào)制控制系統(tǒng),實(shí)現(xiàn)了心臟掃描輻射降低,,圖像質(zhì)量良好的效果,。
關(guān)鍵詞: FPGA 心臟掃描 DOM
中圖分類號(hào): TN709
文獻(xiàn)標(biāo)識(shí)碼: A
DOI:10.16157/j.issn.0258-7998.212022
中文引用格式: 朱炯,李康,,徐亦飛. 基于FPGA的心臟掃描自動(dòng)管電流調(diào)制控制系統(tǒng)設(shè)計(jì)與分析[J].電子技術(shù)應(yīng)用,,2021,47(12):31-34,,38.
英文引用格式: Zhu Jiong,,Li Kang,Xu Yifei. Design and analysis of cardiac scans use dose of modulation control system based on FPGA[J]. Application of Electronic Technique,2021,,47(12):31-34,,38.
Design and analysis of cardiac scans use dose of modulation control system based on FPGA
Zhu Jiong,Li Kang,,Xu Yifei
Minfound Medical Co.,,Ltd.,Shaoxing 312000,,China
Abstract: When applying a cardiac scan, the image reconstruction only needs the expose data that sampled in the cardiac diastolic phase, and other periods sampled data are discarded. Therefore, the forward-looking scan pattern can be used in order to reduce the radiation dose. Due to the different cross sections of the scanning plane, the dose of modulation(DOM) can be used to reduce the radiation dose further. According to the attenuation difference of the cross section of the scanned object at different angles, the DOM adjusts the mA value based on the angles in real time, so the DOM can improve the xray efficiency and reduce the radiation dose. By combining the characteristics of the two, a forward-looking automatic tube current modulation control system for cardiac scanning is designed, which realizes the effect of reducing cardiac scanning radiation and getting good image quality.
Key words : FPGA,;cardiac scan;DOM

0 引言

    目前在使用的心臟掃描降低輻射劑量的方法主要是采用雙源CT,,加快掃描轉(zhuǎn)速并使用前瞻式掃描來實(shí)現(xiàn)[1-4],。

    采用單源CT實(shí)現(xiàn)低劑量心臟掃描是加強(qiáng)單源CT使用范圍的途徑。而單源CT普遍采用的是回顧式掃描方式,,采用FPGA為核心的心臟掃描自動(dòng)管電流調(diào)制控制系統(tǒng)設(shè)計(jì),,實(shí)時(shí)監(jiān)測(cè)外部輸入的心臟信號(hào),結(jié)合自動(dòng)管電流調(diào)節(jié)技術(shù),,實(shí)現(xiàn)類前瞻式心臟掃描方法,,在保持圖像質(zhì)量的前提下,降低輻射劑量,,且可根據(jù)圖像重建范圍調(diào)整管電流自動(dòng)調(diào)節(jié)區(qū)域,。




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作者信息:

朱  炯,,李  康,,徐亦飛

(明峰醫(yī)療系統(tǒng)股份有限公司,浙江 紹興312000)




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