American scientist (1929-) who shared the 2003 Nobel Prize for Physiology or Medicine with Sir Peter Mansfield for discoveries concerning “magnetic resonance imaging.” (Magnetic resonance imaging is better known perhaps as MRI). Lauterbur did his work first at the State University of New York at Stony Brook and then at the University of Illinois in Urbana where he is Professor of Chemistry, Biophysics and Computational Biology and Bioengineering.
Paul Lauterbur discovered the possibility to create a two-dimensional picture by introducing gradients in the magnetic field. By analysis of the characteristics of the emitted radio waves, he could determine their origin. This made it possible to build up two-dimensional pictures of structures that could not be visualized with other methods.
Lauterbur discovered that introduction of gradients in the magnetic field made it possible to create two-dimensional images of structures that could not be visualized by other techniques. In 1973, he described how addition of gradient magnets to the main magnet made it possible to visualize a cross section of tubes with ordinary water surrounded by heavy water. No other imaging method can differentiate between ordinary and heavy water.
Washing out. Gastric lavage, for example, is the washing out of the stomach to remove drugs or poisons.
Laparoscopic assisted vaginal hysterectomy, a procedure using laparoscopic techniques to remove the uterus (womb) and/or tubes and ovaries through the vagina (birth canal). In LAVH, several small incisions (cuts) are made in the abdominal wall through which slender metal tubes known as “trocars” are inserted to provide passage for a laparoscope and other microsurgical tools. […]
- Law, Hardy-Weinberg
A basic concept in population genetics that relates the gene frequency to the genotype frequency. The Hardy-Weinberg law can be used, for example, to determine allele frequency and heterozygote frequency when the incidence of a genetic disorder is known.
Something that promotes emptying of the bowels. Laxatives are used to combat constipation. They are sometimes overused, producing diarrhea. Laxatives include milk of magnesia and many others.
- Lay midwife
A midwife who has entered the profession as an apprentice to a practicing midwife rather than attending a formal school program.