摘要本文应用磁性示踪法测定309例多种慢性胃病的胃排空时间。其方法是在试餐同时吞服示踪剂（特制粉），以永磁体体表磁化，形成胃内磁场，以弱磁场测量仪探测随试餐排空而衰减的胃磁场，通过计算求出胃半排空时间。该法安全简便，所测数据与放射性同位素法相似。胃半排空时间，慢性浅表性胃炎1.26±0.44h，对照组0.95±0.39h，差异有显著性；其余胃病与对照组差异无显著性。

abstractsThe gastric emptying in 309 cases of various gastric diseases was measured by our newly developed magnetic tracer method (magnetogastrogram). Two Gm of magnetic tracter (Fe 3O 4) was mixed in the test meal. After the subject had taken the meal the residual magnetism in the stomach was measured through the overlying skin by means of a weak magnetic tester, a fluxgate magnetometer immediately and at 0.5, 1.0, 1.5. and 2.0 hours separately. The half emptying time (T 1/2) can be calculated by using exponential formula. The T 1/2 of chronic superficial gastritis was 1.26±0.44 hours and that of the controls was 0.95 ± 0.39 hours. There was significant difference between them, but no significant difference between other varieties of stomach diseases and the controls. The magnietc tracer method seems to be safer and simpler than radio-isotopic method.