1.Please explain how medical magnetic resonance imaging (MRI) exploits the magnetic properties of the nucleus.
MRI exploits the process known as nuclear magnetic resonance (NMR). In fact the technique used to be called simply NMR or NMR imaging, but the “nuclear” was dropped because of the connotation of radiation hazards from unstable nuclear sources, although there is no logical rationale for such fear.
In NMR, a sample of material is placed in a strong magnetic field. The nuclei in the sample, each having a spin and therefore a magnetic moment, align and precess about the axis of the field. The other allowed quantum configuration is to align in the opposite direction (against the field). The energy needed to jump up to that state is proportional to …show more content…
8.Please explain, what other wavelengths of electromagnetic radiation are used in medicine? Phototherapy, the controlled exposure to sunlight or ultraviolet light source, is used often in medicine for a number of reasons. For example, exposing the infant to ultraviolet rays or sunlight helps a jaundiced infant break down excess bilirubin or bile. Ultraviolet light has wavelengths in the 10 to 400 nm range (between visible light and X-rays in the spectrum). Lasers are used routinely to remove certain skin growths or even unwanted hair. They are also used widely in eye surgery and as a cauterizing tool in other surgery. Eye surgery utilizes eximer lasers at about 100 nm. Soft tissue surgery such as resurfacing procedures typically uses a 3 micron YAG laser or 10 micron CO2 laser.
Thermography is a medical imaging technique using infrared light. This passive imaging technique senses the thermal emission from the body at wavelengths greater than 8 microns, revealing the temperature of the body. Infrared light can also be applied as a heat treatment to patients.
9.Please explain, what is the wavelength of the carrier wave used by your favorite radio
MRI exploits the process known as nuclear magnetic resonance (NMR). In fact the technique used to be called simply NMR or NMR imaging, but the “nuclear” was dropped because of the connotation of radiation hazards from unstable nuclear sources, although there is no logical rationale for such fear.
In NMR, a sample of material is placed in a strong magnetic field. The nuclei in the sample, each having a spin and therefore a magnetic moment, align and precess about the axis of the field. The other allowed quantum configuration is to align in the opposite direction (against the field). The energy needed to jump up to that state is proportional to …show more content…
8.Please explain, what other wavelengths of electromagnetic radiation are used in medicine? Phototherapy, the controlled exposure to sunlight or ultraviolet light source, is used often in medicine for a number of reasons. For example, exposing the infant to ultraviolet rays or sunlight helps a jaundiced infant break down excess bilirubin or bile. Ultraviolet light has wavelengths in the 10 to 400 nm range (between visible light and X-rays in the spectrum). Lasers are used routinely to remove certain skin growths or even unwanted hair. They are also used widely in eye surgery and as a cauterizing tool in other surgery. Eye surgery utilizes eximer lasers at about 100 nm. Soft tissue surgery such as resurfacing procedures typically uses a 3 micron YAG laser or 10 micron CO2 laser.
Thermography is a medical imaging technique using infrared light. This passive imaging technique senses the thermal emission from the body at wavelengths greater than 8 microns, revealing the temperature of the body. Infrared light can also be applied as a heat treatment to patients.
9.Please explain, what is the wavelength of the carrier wave used by your favorite radio