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1. **Case Study**: A 45-year-old male presents with a palpable mass in
the right breast. Which imaging modality would be most appropriate for
initial screening?
 - A) Mammography
 - B) Ultrasound
 - C) MRI
 - D) PET Scan
 **Answer**: A) Mammography. Rationale: Mammography is the
standard initial imaging technique for breast masses due to its high
sensitivity and specificity.
2. **Case Study**: A 55-year-old female with a history of smoking
undergoes a CT scan for persistent cough. A 2 cm nodule is found in the
left lung. What is the next best step for diagnosis?
 - A) Bronchoscopy
 - B) Sputum cytology
 - C) Biopsy
 - D) PET Scan
 **Answer**: C) Biopsy. Rationale: Given the size and risk factors, a
biopsy is warranted to obtain a definitive diagnosis.
3. **Case Study**: A patient diagnosed with colorectal cancer requires
staging. Which imaging study provides information on both local and
distant disease spread?
 - A) MRI
 - B) CT scan
 - C) Endoscopic ultrasound
 - D) X-ray
 **Answer**: B) CT scan. Rationale: CT scans are useful in staging
colorectal cancer as they can evaluate both the primary site and distant
organs for metastasis.
4. **Case Study**: During routine screening, a 50-year-old female's
mammogram shows microcalcifications in the left breast. What is the
significance of this finding?
 - A) Benign changes
 - B) Highly suggestive of malignancy
 - C) Indicative of infection
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