Nuclear Medicine — Flashcards

Flashcard 41: _____ of the liver can be accurately diagnosed with isotope-labeled red blood cell scans.

Answer: Hemangioma

Flashcard 42: What investigation is performed 4–6 months after an acute infection (e.g., due to VUR) to locate and delineate renal scarring?

Answer: Dimercaptosuccinic acid (DMSA) scan

Flashcard 43: Salivary tumor showing hotspot in technitium-99 scan is _____

Answer: Warthin's tumor

Flashcard 44: The screening investigation used in reno-vascular hypertension is _____

Answer: Captopril DTPA

Flashcard 45: Tc-99m sulfur colloid scan finding in amoebic liver abscess:

Answer: Cold spot (photopenic area)

Flashcard 46: An _____ scan is required for the evaluation of the skeletal metastasis in a patient of neuroblastoma

Answer: I123 MIBG

Flashcard 47: _____ accumulates in the damaged myocardium and area of infarct appears as a hot spot.

Answer: Tc 99m pyrophosphate (nuclear imaging agent)

Flashcard 48: The 99mTc labeled heat-denatured RBC is used for specific _____ assessment

Answer: splenic

Flashcard 49: Which isotope scan is taken up by RES of the liver?_____

Answer: Tc99 colloid scan

Flashcard 50: Long-lived radiotracers (e.g., Thallium-201 or Tc-99m) are usually combined with _____ induced stress for myocardial perfusion imaging

Answer: exercise (exercise/pharmacological)

Extra: Longer-lived tracers used in SPECT (like Thallium-201 or Tc-99m sestamibi) allow enough time for the patient to perform treadmill exercise before being positioned for imaging. In contrast, short-lived PET tracers (like N-13 Ammonia or Rubidium-82) are typically paired with pharmacological stress (e.g., adenosine, regadenoson) because their very short half-lives require imaging to begin immediately after injection, making treadmill exercise logistically difficult.