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r心功能仪亦称核听诊器（Nu-clear stethoscope），是应用放射性核素测定心功能的一种简便准确的智能仪器，已得到广泛的研究和应用。可以对左室射血分数（LVEF），肺循环时间（PTT），相对心排血量（RCO），射血率（ER），相对每搏量（SV）、左心排空时间（LVET）等心脏功能参数进行无创伤性检测，对冠心病的早期诊断，心功能估量，手术筛选，心脏手术和药物疗效的观察及预后的判断具有重要意义。下面概要介绍核听诊器检查心功能的情况。
r Heart function instrument, also known as Nu-clear stethoscope, is a simple and accurate intelligent instrument that uses radionuclide to measure cardiac function and has been widely studied and applied. Left ventricular ejection fraction (LVEF), pulmonary circulation time (PTT), relative cardiac output (RCO), ejection rate (ER), relative stroke volume (SV), left ventricular emptying time Cardiac function parameters of non-invasive detection of coronary heart disease early diagnosis, cardiac function evaluation, surgical screening, cardiac surgery and drug efficacy observation and prognosis of great significance. The following is an overview of the nuclear stethoscope to check cardiac function.