CRF表数值问题，出现NaN

src/views/trials/trials-panel/reading/dicoms3D/components/customize/QuestionFormItem.vue

@@ -818,6 +818,9 @@ export default {
       } catch (e) {
         console.log(e)
       }
+      if (isNaN(num)) {
+        return null
+      }
       if (rules.ValueType === 2) {
         num = num * 100
       }