MRI Image Orientation Quiz

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Questions and Answers

What is the primary purpose of having an intravenous line in the patient?

To monitor patient's position

To monitor patient's orbit

To administer medication (correct)

To track patient's vital signs

What is the relationship between T1 and T2?

T1 and T2 are two different machines used for similar purposes

T1 is an older model, while T2 is a newer version

T1 and T2 are interchangeable terms

T1 is used for orbit positioning, while T2 is used for patient positioning (correct)

What is the role of ثؼذ انغشاؽخ in the context of patient care?

It is a type of medication

It is a type of medical equipment (correct)

It is a type of medical terminology

It is a type of medical procedure

What is the significance of انزغهغم انًؾٕس٘ انًشعؼ in the context of patient care?

It is a type of patient positioning Signup and view all the answers

What is the purpose of ئكه in the context of patient care?

It is a type of medical equipment Signup and view all the answers

What is the relationship between انزغهغم and انًشعؼ?

انزغهغم is a type of انًشعؼ Signup and view all the answers

What is the primary consideration when placing coils in relation to the patient's anatomy?

Positioning the coils parallel to the anatomy Signup and view all the answers

Why is it important to avoid touching the patient with the coils?

To minimize interference with the imaging process Signup and view all the answers

What is the ideal orientation of the coils relative to the patient's eye?

Parallel to the eye Signup and view all the answers

How close should the coils be placed to the patient's eye?

As close as possible without touching the patient Signup and view all the answers

What is the primary benefit of placing the coils parallel to the anatomy?

Enhanced coil sensitivity Signup and view all the answers

What is the purpose of the orientation labels in the MRI image?

To provide a reference point for diagnosis Signup and view all the answers

What is the significance of the two orientation labels in the MRI image?

One label is for the top and the other is for the left Signup and view all the answers

What is the relationship between the orientation labels and the image presentation?

The orientation labels are essential for image presentation Signup and view all the answers

What is the purpose of the MRI image with the orientation labels?

To diagnose brain and orbit disorders Signup and view all the answers

What is the significance of the 2+1 ‫م‬ equation in the context of MRI images?

It is irrelevant to MRI images Signup and view all the answers

What is the purpose of immobilizing the patient using sponges and straps?

To prevent movement during the scan Signup and view all the answers

Which sequence is typically used in the initial scout?

T2-weighted axial Signup and view all the answers

What is the primary benefit of using a surface coil in MRI?

Increased signal-to-noise ratio Signup and view all the answers

What is the purpose of the axial plane in MRI?

To assess the brain and cerebrospinal fluid Signup and view all the answers

What is the typical slice thickness for Spin Echo (SE) 2-D imaging?

3 mm Signup and view all the answers

What is the percentage of slice gap for Spin Echo (SE) 2-D imaging?

20% of slice thickness Signup and view all the answers

What is the advantage of using a T2-weighted sequence in MRI?

Enhanced contrast between soft tissues Signup and view all the answers

What is the primary consideration when selecting a sequence protocol in MRI?

Body region and suspected pathology Signup and view all the answers

What is the saturation slab configuration for Spin Echo (SE) imaging?

No, but perhaps 50% phase oversampling Signup and view all the answers

What is the typical slice thickness for Gradient Echo (GRE) 3-D imaging?

1-1.5 mm Signup and view all the answers

What is the slice gap configuration for Gradient Echo (GRE) 3-D imaging?

0 mm or factor 1.0 Signup and view all the answers

What is the relationship between_GRE (3-D) and SE (2-D) in terms of spatial resolution?

SE (2-D) has higher spatial resolution than GRE (3-D) Signup and view all the answers

Study Notes

MRI of the Brain and Orbit

Each displayed image has two orientation labels, one at the top and the other at the left of the image.
MRI sequences include:
- T2-weighted axial
- T1-weighted axial
- Others (T2, T1, etc.)

Patient Position and Preparation

Patient should have an intravenous line.
Coils should be placed parallel to the anatomy and as close as possible to the eye without touching the patient.
Immobilize the patient using sponges and straps.
Ensure proper positioning and immobilization to avoid motion artifacts.

Orbit Imaging

Patient should be positioned to minimize movement and artifacts.
Surface coils are used to improve image quality.
Imaging protocols include:
- Scout: three planes (sagittal, coronal, and axial)
- Sequence T2-weighted axial: along the optic nerve, plot on axial slice
- Slice thickness: 3 mm (SE, 2-D), 1-1.5 mm (GRE, 3-D)
- Slice gap: 20% of slice thickness (SE, 2-D), continuous (GRE, 3-D)
- Saturation slab: no (but perhaps 50% phase oversampling)

Sequences

T2-weighted axial: along the optic nerve, plot on axial slice
Sequence parameters:
- Spin echo (SE): 2-D, 3 mm slice thickness, 20% slice gap
- Gradient echo (GRE): 3-D, 1-1.5 mm slice thickness, continuous slice gap
Other sequences: T1-weighted axial, etc.