File 13

Question 1

Pair production:
A) 5.11 KeV
B) 1.022 MeV
C) 1.022 KeV
D) 511 keV

Answer 1

B) 1.022 MeV

Question 2

Regarding adequate technique in mammo views

A) Nipples should be seen in profile in MLO view.
B) Skin folds should be seen in CC view
C) Pectoralis muscle should end at or just below the level of the nipple in MLO view

Answer 2

A) Nipples should be seen in profile in MLO view.

Question 3

Which improve MRI spatial resolution:

A) Increase slice thickness
B) Increase matrix size
C) Increase number of pixels

Answer 3

B) Increase matrix size

Question 4

Which of the following cause this artifact: (provided image of Skull x ray with lines artifacts cause by the grid).

A) Upside down grid
B) Grid lines
C) Grid and pixel lines

Answer 4

B) Grid lines

Question 5

US frequency:
A) Less than 20 Hz.
B) 20 - 20000 Hz.

Answer 5

B) 20 - 20000 Hz.

Question 6

Radio frequency angel in relation to magmatic angel:

A) 0
B) 180
C) 90

Answer 6

C) 90

Question 7

MRI artifacts

Answer 7

Question 8

Pelvic CT of pediatric patient.

Answer 8

A) Beam hardening.

Question 9

Patient presented post-MVA with headache. What is the diagnosis?

A) Arachnoid cyst
B) Epidermoid cyst

Answer 9

A) Arachnoid cyst

Question 10

What normally enhances on contrast enhanced MRI?

Answer 10

A) Pituitary stalk

Notes: PPCD
- Enhanced → Pineal gland, pituitary gland, choroid plexus, and dura.

Question 11

Forgot the whole vignette but the patient could not look LATERALLY. Which cranial nerve is affected?

A) 3
B) 4
C) 5
D) 6

Answer 11

D) 6

Notes: SO4 LR6

Question 12

Which is true about the appearance of Rathke cleft cyst?

A) Peripheral calcification
B) Hyperintense on T1 with peripheral enhancing rim

Answer 12

B) Hyperintense on T1 with peripheral enhancing rim

Question 13

Patient presented with tinnitus and other symptoms. An MRI image was provided. What is the diagnosis?

A) Meningioma
B) Vestibular schwannoma

Answer 13

Depend

Question 14

Which is true regarding the lesion?

A) Extraconal
B) Intraconal cavernous hemangioma
C) Retrobulbar

Answer 14

B) Intraconal cavernous hemangioma

Question 15

Patient post-RTA with the following CT scan findings. Which artery is most likely to get compressed?

A) ACA
B) MCA

Answer 15

B) MCA

-Epidural hematoma.
- √ MCA.

Question 16

Patient presenting with hyperprolactinemia and her MRI was done with the following images. What is the proper description of the following lesion?

A) Anterior pituitary hypo-enhancing lesion
B) Posterior pituitary hypo-enhancing lesion
C) Posterior pituitary hyper-enhancing lesion
D) Pituitary stalk hypo-enhancing lesion

Answer 16

A) Anterior pituitary hypo-enhancing lesion