| temperature changes caused by mr imaging of the brain with a head coil. | tissue heating caused by exposure to rf radiation is a primary safety concern in mr imaging. therefore, to determine temperature changes caused by high field strength mr imaging of the brain with a head coil, we measured body and skin temperatures in 35 patients immediately before and after clinical mr imaging. mr imaging was performed with a 1.5 t mr system using a 28-cm, open-bore rf transmit/receive head coil specifically designed for examinations of the brain. the average body temperature wa ... | 2011 | 3128077 |
| total and high-density lipoprotein cholesterol measurements. hazards in clinical interpretation. | duplicate plasma specimens from 24 persons were sent to a community hospital, a commercial laboratory, and a university lipid research laboratory at two separate times to assess the intralaboratory and interlaboratory variations of total and high-density cholesterol measurements. for all three laboratories, the 95% confidence limits for the reproducibility of total cholesterol levels are about +/- 5.5%. for high-density lipoprotein (hdl) values, they are +/- 7%, +/- 14.45%, and +/- 9%. interlabo ... | 2008 | 2588565 |