Please help to correct this sentence I am writing an important article, I found that there are some sentences are not fluent, but I don't know how to correct it. The paper talks about a contactless sensor for breathing monitoring.

Could you help me ?

Thanks!

Non-invasive respiratory monitoring is commonly used to detect the apnea risk of sleeping babies in bed cots, or old people abnormal events at their home. In most daily life cases, the use of respiratory belts or spirometers is not suitable since invasive. Therefore, a contactless and automatic measurement system is desirable.

Again, the negative delay components originate from the shoulder and the arms, they are here useless regarding breathing.

(That means the  negative delay components do not help to detect the breathing)