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近年来,随着心脏超声图象诊断技术的迅速发展,心脏超声图象的自动摄影已成为一个亟待解决的问题。临床诊断常用的心脏超声图象显示器有两种——显示心脏剖面图的B型显示器以及显示心动图的M型显示器。本文介绍一种专为兼备B型和M型两种显示器的超声图象仪设计的自动摄影电路。自动摄影电路应满足如下临床要求: 1.可按需选择病人心电周期中任一特定时刻作为心脏剖面图的摄影时机; 2.在M型显示器所显示的心电波形上应呈显一个摄影时机标记(窄方波或增辉圆光点),供预选合适的剖面图摄影时机用; 3.一俟摄影时机选定,每随意按动一下摄影指令按钮,电路即自动捕捉预定的摄影时机,并准确及时地吸动电磁阀开启相机快门一次;
In recent years, with the rapid development of diagnostic techniques of echocardiography, the automatic photography of echocardiographic images has become an urgent problem to be solved. There are two types of cardiac ultrasound image displays commonly used in clinical diagnosis: a B-type display with a heart cross-section and an M-type display with a cardiogram. This article describes an automatic imaging circuit designed for both B-and M-type ultrasound imager design. Automatic photographic circuit should meet the following clinical requirements: 1. Can be selected on the patient’s ECG cycle at any particular moment as a heart cross-sectional picture of the timing of the moment; 2. M-type display on the ECG waveform should be significant for a photography Timing mark (narrow square wave or highlight point) for the preselection of appropriate cross-section photographing timing; 3. Once the photography timing is selected, every time the photographing instruction button is pressed freely, the circuit will automatically capture the scheduled photographing opportunity and Accurately and timely suction electromagnetic valve to open the camera shutter once;