Daily Archives: 18/01/2013


_ _ _ _ _ _ _ MRI uses magnetic fields and radio waves to produce images of thin slices of tissues (tomographic images). Normally, protons within tissues spin to produce tiny magnetic fields that are randomly aligned. When surrounded by the strong magnetic field of an MRI device, the magnetic axes align along that […]

ct scan

_ _ _ _ _ n CT, an x-ray source and x-ray detector housed in a doughnut-shaped assembly move circularly around a patient who lies on a motorized table that is moved through the machine. Usually, multidetector scanners with 4 to 64 or more rows of detectors are used because more detectors allow quicker scanning […]

radiological imaging

_ _ _ _ _ Share This Continuing improvements in radiologic imaging make it increasingly useful in diagnostic evaluation. Primary care and referring physicians work with radiologists who specialize in diagnostic imaging to choose the best imaging test for each evaluation. Many imaging tests use ionizing radiation (x-rays and radionuclides) and radiographic contrast agents; the […]


_ _ _ _ Exercise stimulates tissue change and adaptation (eg, increase in muscle mass and strength, cardiovascular endurance), whereas rest and recovery allow such change and adaptation to occur. Recovery from exercise is as important as the exercise stimulus. Regular physical activity reduces the likelihood of medical illness, decreases the incidence of the major […]

benzodiazepine addication

_ _ _ _ _ _ _ Anxiolytics and sedatives (hypnotics) include benzodiazepines, barbiturates, and related drugs. High doses can cause stupor and respiratory depression, which is managed with intubation and mechanical ventilation. Chronic users may have a withdrawal syndrome of agitation and seizures, so dependence is managed by slow tapering with or without substitution […]

drug dependence

_ _ _ _ Some people who use drugs use large enough amounts often enough and long enough to become dependent. Definitions A single definition for drug dependence is elusive. Concepts that aid in defining drug dependence are tolerance and psychologic and physical dependence. Tolerance describes the need to progressively increase the drug dose to […]

happiness forever

_ _ _ _ _ On Happiness foreverIs happiness forever desirable? it is not.happiness can only be understood in the context of sadness and without sadness happiness is a disease process leading to complications ..A paper describes happiness forever as a medical diseaseBut all this later Today in an entertaining talk on happiness forever by […]