Source of Support: None, Conflict of Interest: None
Among the various quality assurance tests carried out on X-ray machines i" a radio-diagnosis department, kVp measurement is an important one. Unfortunately, the commercially available instruments for . ' measuring kVp are very expensive and generally unaffordable by small radiodiagnostic centres. A simple kvp, penetrameter and a home made optical densitometer have been used to study a total of 15 X-ray machines. The study shows that the simple penetrameter and the optical densitometer are useful and economical tools for checking kVp in small X-ray units.