Correct Answer - C
Ans. Gamma rays
Radioiodine generates both beta and gamma rays butpredominantly
beta rays.

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Correct Answer - B
Answer- B. CT Scan

CT Scan is superior to plain radiographs in detection of minute
quatities of pneumoperitoneum
Thus CT Scan is regarded as the most sensitive investigation for
detection of minute quantities of intraperitoneal gas.

Best radiographic view for pneumoperitoneum is Chest x-ray. It is usually the first investigation of choice.

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Correct Answer - A
Answer- A. Ileocecal TB

Conical cecum or Amputed cecum Cecum is shrunken in size and
pulled out of the iliac fossa due fibrosis and contraction of
mesocolon.

Stierlin sign :- Narrowing of terminal ileum with rapid emptying into a shortened, rigid or obliterated cecum. String sign

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Correct Answer - A
Answer- A. Magnetic Resonance Imaging

Whole-body MR imaging with use of a rolling table platform in
conjunction with fast T2-weighted turbo spin-echo and 3D gradientecho sequences is a time-saving and accurate alternative to conventional multimodality evaluation of patients with tumors for metastases.

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Correct Answer - B
Answer- B. Intestinal obstruction

Stepladder sign represents the appearance of gas-fluid distended
small bowel loops that appear to be stacked on top of each other,
typically observed on erect abdominal radiographs in the setting of small bowel obstruction.

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Correct Answer - D
Answer- D. Posterior urethral valves

The keyhole sign is an ultrasonographic sign seen in boys with posterior urethral valves.

lt refers to the appearance of the proximal urethra (which is dilated) and associated thick walled distended bladder which on ultrasound may resemble a key hole.

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Correct Answer - D
Answer- D. Bat wing sign

Acute pulmonary edema : - Acute pulmonary edema is characterized
by centrally located alveolar sign, with hazy or fluffy increased
density in perihilar distribution, creating a bat-wing or angel-wing
paftern.

There is relative sparing of the more peripheral zones of
lung fields.

Air bronchogram become evident as edema becomes more opaque.

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Correct Answer - B
Answer- B. CECT scan

Contrast enhanced CT in usually considered to be investigation of
choice for lung abscess, showing a cavity with thick walls and
central mobile fluid.

It helps to differentiate abscess from empyma, necrotizing pneumonia, sequestration, pneumatocele or underlying
congenital abnormalities such as bronchogenic cyst.

@Radiology_videos

Correct Answer - B
Answer- B. Invasive pulmonary aspergilossis

The halo sign (HS) in chest imaging is a feature seen on lung
window settings (typically HRCT), ground glass opacity surrounding
a pulmonary nodule or mass and represents hemorrhage.
It is typically seen in angioinvasive aspergillosis.

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