Molecular Imaging Practice Questions

Question 1

Based on the provided image, which of the following is the correct diagnosis?

Accepted Answer

Unicornuate Uterus

Answer

Uterus didelphys

Answer

Bicornuate Uterus

Answer

Septate uterus

Question 2

Which of the following statements best describes the mechanism of action of insulin on target cells?

Accepted Answer

Insulin binds to a transmembrane receptor on the outer surface of the plasma membrane, activating the tyrosine kinase in the cytosolic domain of the receptor.

Answer

Insulin binds to a receptor on the outer surface of the plasma membrane, activating adenylate cyclase through the Gs protein.

Answer

Insulin binds to a cytoplasmic receptor and is transferred as a hormone receptor complex to the nucleus to modulate gene expression.

Answer

Insulin enters the cell and causes the release of calcium ions from intracellular stores.

Question 3

Gold standard investigation for breast carcinoma screening in a patient with silicone breast implants

Accepted Answer

MRI

Answer

Mammography

Answer

CT scan

Answer

USG

Question 4

Identify the gene commonly involved in the condition shown in the image?

Accepted Answer

BRAF V600E

Answer

RAS

Answer

RET

Answer

P53

Question 5

Investigation of choice for vascular ring around airway:

Accepted Answer

CT

Answer

PET

Answer

Catheter directed angiography

Answer

MRI

Question 6

The procedure of choice for the evaluation of an aneurysm is:

Accepted Answer

Computed tomography

Answer

Ultrasonography

Answer

Magnetic resonance imaging

Answer

Angiography

Question 7

What is the next best step for a 22-year-old with a hepatic hemangioma on ultrasound?

Accepted Answer

MRI

Answer

Angiography

Answer

CT

Answer

Biopsy

Question 8

Which of the following statements about CT imaging is the MOST accurate?

Accepted Answer

Water has a Hounsfield unit (HU) of zero.

Answer

CT head dose remains constant regardless of the protocol used.

Answer

CT cannot detect gallstones under any circumstances.

Answer

CT uses unfiltered x-ray beams.

Question 9

A research team is developing a new radiotracer for imaging hypoxia in tumors. They need to select between 18F-labeled and 64Cu-labeled versions of the same molecule. Considering half-lives (18F: 110 min, 64Cu: 12.7 hours), positron ranges, and clinical applicability, which choice and rationale is most appropriate?

Accepted Answer

18F for better spatial resolution despite requiring on-site cyclotron

Answer

64Cu for longer imaging window despite inferior image quality

Answer

64Cu because shorter positron range improves resolution

Answer

18F because longer half-life allows delayed imaging

Question 10

In designing a clinical protocol for PSMA PET imaging in prostate cancer, which combination of factors would provide optimal image quality while minimizing radiation exposure?

Accepted Answer

68Ga-PSMA with 1 hour uptake time and furosemide administration

Answer

18F-PSMA with 4 hour delayed imaging

Answer

68Ga-PSMA with 3 hour uptake time without furosemide

Answer

18F-PSMA with 30 minutes uptake time and forced hydration

Molecular Imaging

Study Resources

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Flashcards

Lessons

Principles of Molecular Imaging

Radiopharmaceuticals for Molecular Imaging

PET Radiochemistry

Molecular Imaging in Oncology

Molecular Imaging in Cardiology

Molecular Imaging in Neurology

Molecular Imaging in Inflammation and Infection

Reporter Gene Imaging

Cell Tracking and Imaging

Nanoparticles in Molecular Imaging

Theranostics

Future Directions in Molecular Imaging

Practice Questions

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About Molecular Imaging for NEET-PG

Lessons in Molecular Imaging

Master Molecular Imaging