If a coronal saturation region is placed anterior to the cervical spine to eliminate motion artifacts from swallowing, which gradient must be turned on during the tranmission of the initial saturation 90 degree RF pulse?

No gradient needs to be turned on

Entry slice phenomenon increase: (select all that apply)

At the first slice in the stack

Turbulent flow is all of the following except:

Lower chance of inaccuracy on image

Found in tortuous sections, distal to biturcations and stenosis

Great deal of dephasing in these locations

Mixing and moving in more than one direction

Physics 2 Quiz 1.1

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Questions: 18 | Attempts: 132 | Updated: Apr 9, 2024

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Apr 09, 2024

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Jun 05, 2017

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Physics 2 Quiz 1.1

A pulse sequence with a given set of parameters allows a maximum of 20 slices. If 2 saturation pulses are then added, one would expect the maximum number of slices to:

Which of the following techniques would be ineffective at reducing motion artifacts created by flood flowing through the sagittal sinus?

The phenomenon that occurs when moving protons, usually when moving perpendicular to the slice plane, appear brighter in the first slice than the rest of the slices is known as what?

_________ is when flowing spins gains 90 degrees at phase as it passes the first positive lobe of gradient, then loses 180 degrees of phase as it passes through the double negative lobe of gradient, then passes through the last positive lobe of gradient. (select all that apply)

Flow that is in same direction as slice selection is called?

Out of phase TE at 1.5T is approximately?

All of the following are ways of compensating for flow phenomena except:

The precessional frequency difference of fat and water at 1.0T is?

For a constant velocity, nuclei take longer to travel through a thin slice compared with a thick slice.

In regards to MRI and flowing blood, all of the following naturally offer dark blood without any special imaging requirements, except which?

If a flowing nucleus is adjacent to a stationary nucleus in a voxel, there is a _______ difference between the two nuclei.

Co-current flow, in regards to entry slice phenomenon, is when the moving protons are traveling in the opposite direction of the slice direction, thus making entry slice phenomenon less pronounce.

If a coronal saturation region is placed anterior to the cervical spine to eliminate motion artifacts from swallowing, which gradient must be turned on during the tranmission of the initial saturation 90 degree RF pulse?

Entry slice phenomenon increase: (select all that apply)

Magnitude of entry slice phenomenon depends on the following: (select all that apply)

The SAT TR is equal to?

Turbulent flow is all of the following except:

If there is two or more echoes produced in a spin echo pulse sequence, intra-voxel dephasing may be reduced by acquiring the second and succeeding even echoes at multiple of the first TE, This is known as: