The LOC requirement is likely just to set a severity of initial impact qualifier. Clinical studies need to set standards so that the results can not be discounted due to weak study parameters. Some of the previous studies done used weak parameters and are discounted.

The SPECT scan is done early in the process to see if the subject is showing improvement in capillary growth. It sounds like if no capillary growth is imaged, the subject will be removed from the study. This could be to also determine if capillary growth parallels cognitive and other PCS symptom improvements.

It is important when reading study parameters and study results and summaries that specific details are very important.

The $75,000+ cost is quite alarming. This sounds more like a program to generate income for the clinic. A package price for 120 HBOT treatments could cost as little as $12,000.

I'd be tempted to spend the $12,000 if there was more science already.

The other studies I have seen do not charge for the HBOT and assessments. The participants only need to pay for transportation and any lodging, food etc. to stay near the clinic.