File 18 Flashcards
Mother noted one eye of her child became white in family GP practitioner after examination by ophthalmoscope he suspicious in retinal mass what is the appropriate action:
A) Repeat ophthalmoscope by ophthalmologist.
B) MR orbit
C) CT orbit
A) Repeat ophthalmoscope by ophthalmologist.
Answer: A
Notes:
- Leukocoria → retinoblastoma.
- MRI is for staging.
- US & ophthalmoscope is for diagnosis.
What is the most echogenic structure in US?
A) Vermis
B) Caudate
C) Corpus callosum
D) Thalamus
A) Vermis
Pregnant lady to do x-ray at the level of the kidney assuming Automatic exposure control is used, what is the most appropriate step to
reduce dose:
A) Cover the abdomen with lead
B) Increase Kvp will lead to decrease mAs by the AEC.
C) Put the patient in prone position
D) Collimate the image to the needed organ
D) Collimate the image to the needed organ
Answer: D
Notes:
- Increasing the KVP will increase the scatter plus you will be covering the whole abdomen
which will affect the fetus thus collimating the image will cover less surface which leads to
less radiation.
What is the fastest sequence in MRI:
A) Echo planar
B) FSE
C) SE
A) Echo planar
Answer: A
Notes:
- The echo planar (EPI) is the fastest acquisition method in MRI
Ultrasound picture shows hyperechoic liver lesion with mirror image
artifact what is the type of artifact.
A) Mirror
B) Reverberation
A) Mirror
How much the angle of the MRI between the primary magnetic field
and the external magnet?
A) 90
B) 180
C) 45
A) 90
In neutral element there what equals the electron number?
A) Atomic number
B) Atomic mass
A) Atomic number
Answer: A
Notes:
- The number of electrons in a neutral atom is equal to the √ number of protons.
Increasing beam filtration will result in?
A) Increase in maximum penetration
B) Increase photons
C) Improve the contrast
C) Improve the contrast
Answer: C
Notes:
- I think the correct answer can be any of the following:
o ↑ photon mean energy.
o ↑ maximum penetration.
o ↓ Photon quantity.
In upper GI of infant how to decrease the radiation exposure?
A) Decrease frame rate
B) Limit the use of image hold and fluoroscopy store
C) Increase distance
B) Limit the use of image hold and fluoroscopy store
In US, the transducer frequency depends on:
A) The crystal thicknesses
B) The Q factors
A) The crystal thicknesses
In MRI used for homogeneity
A) Shim
Answer: A
Notes:
- Shimming (shim coils) is used prior to the operation of the magnet to eliminate
inhomogeneities in its field.
Deep palmar arch which is mainly supplied by:
A) Ulnar artery
B) Radial and ulnar
C) Directly from brachial artery
B) Radial and ulnar
Mainly by Radial
General both
Where is the location of tunneled tube for dialysis?
A) Femoral vein
B) Transjugular vein
C) Transhepatic
B) Transjugular vein
Answer: B
Notes:
- Used for temporary dialysis access.
Which of the following is an indication for PTC:
A) Failed ERCP
B) During TIPS
C) Prehepatic transplantation.
A) Failed ERCP
Which of the following is true regarding fibroid embolization?
A) On side embolization is usually effective
B) Hypogastric nerve block is efficient
C) Uterine artery spasm is rare.
D) Fibrous explosion is painless.
B) Hypogastric nerve block is efficient
Answer: B
Notes:
- Superior Hypogastric nerve Block (SHNB) has been shown to be an effective pain
management technique after Uterine Fibroid Embolization.