barium tablet
铌酸锶钡热电晶片材料 strontium barium niobate pyroelectric crystal plate
材料和方法：22例均行心脏正位及左侧位食道吞钡摄片，19例经手术证实，2例经造影证实，1例经彩超证实。
Materials and Methods: 22 patients were radiographed in PA view and left lateral view with esophageal barium swallow, 19 were confirmed by operation, 2 by angiography, 1 by US doppler.
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