Imagistica prin rezonanta magnetica nucleara. Aplicatii in studiul sclerozei multiple si a valvulopat

Introducere………………………………………………………………....
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|1.  Geneza semnalului RMN                                         |4  |
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|          |1.1. Nucleii …………..……………………………………….                    |8  |
|          |1.2. Câmpul magnetic                                   |9  |
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|          |.......                                                |   |
|          |1.3. "Precesia" nucleilor………………………………………               |9  |
|          |1.4. Timpii fizici de relaxare (T, şi T2)………………………     |11 |
|          |1.5.  Substratul biologic al timpilor de relaxare………………|12 |
|          |1.6.  Semnalul RMN. Trăsături, semnificaţie………………...   |15 |
|2. Producerea                                                     |16 |
|imaginii..........................................................|   |
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|          |2.1.  Gradienţii magnetici                             |16 |
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|          |..                                                     |   |
|          |2.2.  Excitaţia selectivă                              |17 |
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|          |.....                                                  |   |
|          |2.3.  Codificarea spaţială a informaţiei               |17 |
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|3. Echipamentul                                                   |19 |
|IRM...............................................................|   |
|....................                                              |   |
|          |3.1.                                                   |19 |
|          |Magnetul...............................................|   |
|          |.............................                          |   |
|          |3.2.  Bobinele de radiofrecvenţă                       |19 |
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|          |3.3.  Gradienţii de câmp                               |19 |
|          |magnetic...........................................    |   |
|          |3.4.  Calculatorul                                     |   |
|          |(computerul)...........................................|   |
|          |......                                                 |   |
|4. Noţiuni elementare de                                          |20 |
|semiologie………..………………......................                       |   |
|          |4.1. Investigarea creierului şi structurilor nervoase. |21 |
|          |Scleroza multiplă………………………………………………......…...          |   |
|          |4.2. Investigarea cordului şi circulaţiei.             |33 |
|          |Valvulopatiile colagenice                              |   |
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|          |4.3. Investigarea altor regiuni anatomice……………………..    |47 |
|Bibliografie......................................................|47 |
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                                   CUPRINS