File 23 Flashcards
As American College of Radiology guideline, the best recommended
study for evaluating abdominal pain is?
A) MRI, PET
B) MRI only
C) PET
D) US, CT
D) US, CT
Answer: D
Notes:
- 1s → US
- 2ɴᴅ → CT
- 3ʀᴅ → MRI
IV drug abuser presented with bilateral pulmonary nodules (they didn’t
give his HIV status)
A) Pneumocystis carinii pneumonia
B) Infective endocarditis
C) CMV
D) HSV
B) Infective endocarditis
Patient with history of aortic dissection type A, he presented with MI,
which coronary do you suspect to be involved:
A) RCA
B) LCA
C) Diagonal
D) Circumflex
A) RCA
Which one of those cardiac CT scans had less radiation dose to the
patient
A) Step and shoot ECG synchronized
B) Retrospective
C) Prospective ECG-triggered cardiac scan with low pitch
D) Dual energy synchronizes cardiac scan
A) Step and shoot ECG synchronized
Which of the following structure is related to the diaphragm
A) Spleen
B) Left adrenal
B) Left adrenal
Compression in mammo?
A) Reduce patient dose
B) Not related to the patient dose
C) Reduce contrast
A) Reduce patient dose
Best view for maxillary sinus?
A) Water’s view
Patient has squamous cell carcinoma in maxilla, if there is neural spread
it will go to:
A) Cavernous sinus
B) Foramen oval
C) Pterygopalatine fossa
C) Pterygopalatine fossa
How much % of scatter radiation in Fluro will be prevented with 0.5
lead apron:
A) 5%
B) 75%
C) 95%
D) 100%
C) 95%
Answer: C
Notes:
- Lead aprons used in diagnostic radiology should have 0.25 mm or 0.5 mm equivalents of lead.
- A lead apron with 0.5 mm lead equivalence weighs about 5 kg (10 lb).
- A 0.5-mm lead-equivalent apron attenuates most of the x-ray beam in diagnostic radiology
and should always be worn when working close to patients being irradiated.
- Lead aprons attenuate at least 90% of most x-ray beams.
Pediatric patient has syncope during playing football. He has family
history of sudden death in young age. MR shows focal enhancement in right ventricle wall with uncoordinated motion. Left ventricle normal. What type of cardiomyopathy does he have
A) Hypertrophic cardiomyopathy
B) Arrhythmogenic right ventricle
C) Restrictive
D) Dilated
B) Arrhythmogenic right ventricle
Notes:
- A → left ventricle.
Disc destruction involving endplates of both upper and lower vertebra
A) TB osteomyelitis
B) Prostate mets
C) Degenerative disc disease
A) TB osteomyelitis
Answer: A
Notes:
- B → posterior element.
Most sensitive sign for portal vein hypertension:
A) Collaterals
B) Enlargement of portal vein
C) Enlargement of hepatic artery
B) Enlargement of portal vein
13 mm > in US
which of the following is found in the free edge of lesser sac?
A) SMV
B) Hepatic vein
C) CBD
CBD
Patient with acute pancreatitis and inflammatory changes, u will see
fluid in:
Answer: Anterior pararenal space.
Notes:
- Pancreas, duodenum, and stomach located in this space.
For the two images below (comparison between first and last images
only):
A) 1st image used higher KVP
B) 1st image used lower KVP
C) 2nd image used edge enhancement filter
D) 2nd image was with heavily filtered beam
C) 2nd image used edge enhancement filter
Patient with retroperitoneal air, you suspect perforated viscus, which
part could be affected?
A) All part of duodenum and ascending and descending colon.
B) Ascending colon, descending colon and rectum
A) All part of duodenum and ascending and descending colon.
Answer: A
Notes: √ 3RD part of duodenum
Cause of ring artifact in CT:
Answer: Bad detector.
Notes:
- How to correct?
o Recalibration
o Replace the detector
PICA is a branch of
A) Vertebral artery
Answer: A
Notes:
o Branches
Basilar artery
Posterior spinal artery
Anterior spinal artery
Posterior inferior cerebellar artery
Susceptibility in MRI is due to
A) Ability of a substance to be magnetized
B) Ability of a substance to conduct
C) Ability to super conduct
A) Ability of a substance to be magnetized
When you apply external magnetic field Bo you will cause:
A) Align the protons parallel to the magnetic field
B) Generate the magnetic momentum
A) Align the protons parallel to the magnetic field
They brought an US image showing yin-yang sign, I forgot the scenario,
which is true regarding pseudoaneurysm:
A) Less risk of rupture than true aneurysm
B) Classically shows yin-yang
C) Less common than true aneurysm
The yin-yang sign, also known as the Pepsi sign, is a radiological sign described in both true
and false aneurysms on various imaging modalities.
Timing for renal parenchymal phase
A) 41-60 sec
B) 61-90 sec
C) 90-120 sec
C) 90-120 sec
ENT physician is suspecting a right recurrent laryngeal nerve palsy,
what you will do?
A) CT neck
B) CT brain
C) MR brain
D) Thyroid scan
A) CT neck
Malignant calcification in mammo?
A) Dystrophic
B) Popcorn
C) Linear branching
C) Linear branching
