Regarding the time the brain scan itself takes: it is usually 45 to 50 minutes. The scan is of the entire brain not just the IAC's. The contrast is administered IV for the latter part of the scan when the IAC's are checked. There is no meaning attached to the time the scan requires.
What is Ether? Ether is a necessary element -- a fuel -- for operating the distributed application platform Ethereum. It is a form of payment made by the clients of the platform to the machines executing the requested operations.
Ether is the first of the five elements of the universe as described by Ayurveda, a sister science of yoga. Ayurvedic teachings state that the universe is composed of five elements: ether, air, fire, water and earth. Ether is considered to be the most subtle of the five elements. Ether is sometimes referred to as space because it is the space that the other elements fill. Ether has the properties of lightness, airiness and spirituality. It has also been equated by some with the concept of consciousness. Yoga practice can help increase one's awareness of ether.