Radiographic Contrast — NDEB AFK MCQ
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Correct answer: B — Kilovoltage peak (kVp)
kVp controls the energy (penetrating power) of the X-ray beam and is the primary determinant of image contrast. Higher kVp produces more uniform penetration of tissues, resulting in lower (long-scale) contrast with more shades of grey. Lower kVp produces higher (short-scale) contrast with fewer but more distinct shades. mA and exposure time affect image density (overall darkness) but not contrast.
Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019