Menopause, also known as the climacteric, is the time in most women's lives when menstrual periods stop permanently, and the woman is no longer able to have children. Menopause typically occurs between 45 and 55 years of age.
The turnaround time for an MRI scan depends on the radiologists' schedule. At many medical centers, the radiologist may interpret the scan and write a report on the order of several hours to one day. From that point, it is up to the physician who ordered the MRI scan to share the results with the patient.
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.