What is JL- Transcranial Doppler Detector?

JL- transcranial Doppler detector is an advanced instrument introduced from Europe and America, which is used to detect mental illness. It is said that the test is very accurate and the cause can be diagnosed in 9 minutes. It seems that only one hospital in Wuhan has this instrument, right? What's its name? Wuhan Military College Hospital, you can check it online.