La radiologa nuclear es una sub especialidad de la radiologa en la cual se introducen radioistopos compuestos que contienen formas radiactivas de tomos en el cuerpo con el propsitos de tomar imgenes, evaluar la funcin del rgano o localizar tumores o enfermedades. En estudios con istopos la radiacin se origina en un radio frmaco material marcado con un radioistopo en el cuerpo rayos gamma. Se coloca una cmara de deteccin especial cerca al rea de inters durante un perodo de tiempo y cuando se "observan" suficientes rayos gamma, un computador crea una imagen que muestra dnde est localizado el istopo dentro del rgano o dentro del cuerpo. Generalmente, las gammagrafas no brindan el nivel de detalle anatmico que se ve con los rayos X, ultrasonido, TC o IRM.
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You have spent thousands of dollars on transistors and circuits and cathode ray Thomson had to decide whether cathode rays were waves or particles. It was later shown that the glow was produced by cathode rays. He developed the Crookes tubes, investigating cathode rays. It remained for Sir J. Thomson to expound on the subatomic nature of cathode rays consisting of streams of negative electrons.
And there is no doubt that cathode ray experiments , for example, reveal the existence of true electrons Jordan. Received the Nobel Prize in Physics in for his pioneering work on the nature of cathode rays. The magnets are deflecting the cathode rays. Birkeland aimed beams of electrons called " cathode rays " in those days at a magnet inside a vacuum chamber, and noted that they seemed to be channeled towards its near magnetic pole.
Wien also made important contributions to the study of cathode rays , X-rays and canal rays. Then JJ Thomson in , deduced that the cathodic rays were rather negatively charged particles than waves, which he named "corpuscles" electrons. He made fundamental contributions to the field of analytical geometry and was a pioneer in the investigations of cathode rays that led eventually to the discovery of the electron. These experiments measured the Doppler shift of the radiation emitted from cathode rays , when viewed from directly in front and from directly behind.
In the s, Goldstein undertook his own investigations of discharge tubes and named the light emissions studied by others Kathodenstrahlen, or cathode rays. What is special about it, is that it allowed the cathode rays to be effected simultaneously by electric and magnetic forces. In th years the English physicist of J. Thomson has proved that these cathodic beams as them then named - not that other, as streams of negatively charged particles.
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