Icon Chercher des jeux
Icon Créer jeu Créer jeu

Magnetic Resonance Imaging (MRI)

Compléter

- components of an MRI machine
- how an MRI machine produces images

Téléchargez la version pour jouer sur papier

Éditer icon Dupliquer
Créer un défi icon Créer un défi
Imprimer icon Imprimer le PDF
À propos de Compléter
biology
magnetic field
mri
 Âge recommandé: 18 ans
0 fois fait

Créé par

Zainab Nabeel
Zainab Nabeel
Bahrain

Top 10 résultats

Il n'y a toujours pas de résultats pour ce jeu. Soyez le premier à apparaître dans le classement!
Connectez-vous
pour vous identifier.
Créez votre propre jeu gratuite à partir de notre créateur de jeu
Créez compléter
Affrontez vos amis pour voir qui obtient le meilleur score dans ce jeu
Créer un défi

Top Jeux

  1. temps
    but
  1. temps
    but
temps
but
temps
but
Vous avez dépassé le nombre maximum de jeux que vous pouvez imprimer avec votre Plan actuel.
Pour imprimer autant de jeux que vous le souhaitez, vous avez besoin d’un Plan Académique ou un Plan Commerciel.
Obtenir Plan Académique

Imprimez votre jeu

 
game-icon

Compléter

Magnetic Resonance Imaging (MRI)Version en ligne

- components of an MRI machine - how an MRI machine produces images

par Zainab Nabeel
1

During MRI testing , the patient sits inside a surrounded by a field . Some mechanisms happen between the MRI machine and the patient's body causing ( radio - frequency ) signals to be released from the patient's body . The MRI machine captures these signals , producing an MRI image . Chemists have been using a technique called spectroscopy ( nuclear magnetic resonance spectroscopy ) since the 1950's to figure out the chemical composition of substances . In NMR spectroscopy , first a sample tube containing the substance is subjected to a strong field . Then , an RF transmitter sends a signal called an RF pulse into the sample . The same RF transmitter is used to detect signals from the sample afterwards . These signals are called decaying electromagnetic signals ( signals that decrease in with time ) . In NMR , we are interested in how strong these signals are at different magnetic field strengths to detect the presence of specific chemical groups . In MRI , we are interested in how fast the signals that belong to hydrogen atoms decay ( called T1 and T2 ) to detect local tissue properties . Nuclear Magnetic Resonance ( NMR ) gets its name because it is associated with the nucleus of atoms . MRI is an imaging technique that is based on the principles of and relies on the body's natural magnetic properties to produce images . Normally , hydrogen spin on their axes in random directions , however when the body is subjected to a magnetic field , the protons' axes will either align with the field or themselves against the field . Protons align in two different directions because of their different energy states . Protons that align with the field are in a lower energy state and protons that align against the field are in a higher energy state . There are usually a few more protons that align with the field than protons that align against the field . These are the protons used for producing an image . Once the magnetic field is applied , the MRI technician would use the RF placed near the body part being scanned to send RF . The extra protons mentioned earlier will absorb the energy of these pulses and that will cause them to flip on their , so they will become aligned the magnetic field . So , essentially these protons have moved to the energy state . When the RF pulses stop , these protons release the energy they absorbed and return to their previous alignments and lower energy states . In doing so , they emit a signal back to the RF coil , which gets turned into an electric that gets digitized by the scanner . That is how an image is produced using an MRI machine . It should be noted however that different shades of can be seen in MRI images . This is due to the varying signal strengths . The stronger the signal back to the coil , the lighter the shade will be . The strength of a signal corresponds to the number of present in the body part . The more protons , the stronger the signal will be .

 
educaplay suscripción
Imprimer le PDF