In radiography, using a small focal spot instead of a large focal spot will result in:
- A Higher heat loading capacity
- B Shorter exposure time
- C Better spatial resolution ✓
- D Increased beam intensity
Correct answer: C. Better spatial resolution
Explanation
A smaller focal spot produces less geometric unsharpness, resulting in better spatial resolution. However, it has lower heat loading capacity (option A is wrong) and requires longer exposure times for the same mAs (option B is wrong). Beam intensity is not directly affected by focal spot size.
Reference: Radiologic Science for Technologists, 12th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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