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MRSO
Time-varying Gradient Magnetic Fields
| Question | Answer |
|---|---|
| This is a set of imaging produced when the Z gradient is activated. | Axial Imaging |
| This is a set of imaging produced when the Y gradient is activated. | Coronal Imaging |
| The amount of time that the gradient coils can remain active. | Duty Cycle |
| A pair of saddle electromagnetic coils are located on the right and left and anterior and posterior of the patient which produces strong magnetic fields from left to the right, and anterior to posterior. | Golay Coil |
| The slope or amplitude of the gradient is activated. | Gradient Steepness |
| A term used to describe the gradient activation in data acquisition. This can be described as the slice selection gradient, phase encoding gradient, and frequency encoding gradient. | Logical Gradient |
| The torque is caused on the MR gantry as the gradient coils are activated. This produces the noises heard in MRI. | Lorenz Force |
| Visually seeing flashing light when exposed to a changing magnetic field. This is caused by nerve stimulation described by Faraday's law of induction | Magnetophosphenes |
| The largest amplitude was witnessed. | Maximum Gradient Field |
| A ring of electromagnetic coils at the patient's foot and Head surrounding the gantry produced a strong gradient magnetic field from Head to foot. | Maxwell Coil |
| This is a way to measure the amount of noise reduced by earplugs or headsets. | Noise Reduction Rating |
| Uncontrollable movement of the eyes when exposed to a changing magnetic field. This is caused by nerve stimulation described by Faraday's law of induction. | Nystagmus |
| When nerves are stimulated when exposed to a changing magnetic field, this is caused by nerve stimulation described by Faraday's law of induction. | Peripheral Nerve Stimulation |
| The term is used to describe the spatial encoding of the gradient coils. For example, the X gradient produces sagittal images, the Y gradient produces coronal images, and the Z gradient produces axial images. | Physical Gradient |
| The wobbling motion that hydrogen nuclei demonstrate. | Precession |
| The period it takes for the gradients to reach the maximum sequence amplitude. | Rise Time |
| This is a set of imaging produced when the X gradient is activated. | Sagittal Imaging |
| The speed at which the gradient coils can change the gradient magnetic fields. | Slew Rate |
Created by:
zach1710