http://www.radtech1895.com X-ray, Radiation, RadTech, Radiology, Radiologic Technology, Reviews, Tips Sat, 04 Feb 2012 15:23:30 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 http://www.radtech1895.com/2009/02/positron-emission-computed-tomography-pet-cyclotron.html/ http://www.radtech1895.com/2009/02/positron-emission-computed-tomography-pet-cyclotron.html/#comments Fri, 06 Feb 2009 05:25:50 +0000 Hariette A.W. http://www.radtech1895.com/?p=622 Click Here To Read More]]>

Built by Lawrence in 1929

Accelerates positive particles rather than the electrons

Uses positively charged particles such as proton, neutron, alphas, deuterons, short- lived radioisotopes

Particles are accelerated in a circular chamber called dees

The particles are accelerated by electric fields between the dees until the particle acquires the desired energy

Powerful magnetic filed are employed to confine the particle to a circular path

Protons are not commonly used for radiation therapy

In some centers, deuterons produced by cyclotron are brought out and allowed to strike targets of beryllium leading to the production of neutrons, such neutrons can be used for radiation therapy

Neutron beam is not universally available for therapy but have been tried clinically by various group in the US

Short- lived isotopes are used in radiopharmaceuticals research

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