T2* can be considered an observed or effective T2, whereas the first T2 can be considered the natural or true T2 of the tissue being imaged. T2* is always less than or equal to T2. T2* results principally from inhomogeneities in the main magnetic field.These inhomogeneities may be the result of intrinsic defects in the magnet itself or from susceptibility-induced field distortions produced by the tissue or other materials placed within the field.2* can be considered an observed or effective T2, whereas the first T2 can be considered the natural or true T2 of the tissue being imaged. T2* is always less than or equal to T2. T2* results principally from inhomogeneities in the main magnetic field.
The average electricity consumption of a US family of four is in the neighborhood of 50 kWh per day, or 1,500 kWh per month. Similar figures apply for Canada. Assuming an average electricity cost of $0.12 per kWh, that translates into about $6 per day for electricity, or $180 per month.
1,253 kWh seems about right. for a month that is an average power use of 1,253 kW-hour/month x 1 day/24 hours x 1 month/30 days = 1.7 kW Average US power use is 1.2 kW per house. Condo in Southern California with 1 or 2 people typically uses about 300 to 400 kWh. The typical electrical usage for a 2000 sq ft home --- without a swimming pool --- in So.