A renal calculus that measures 0.2 mm in size
A)cannot be visualized with an effective focal spot of 0.5 mm focal spot due to penumbral overlap.
B)is best seen with magnification and a large focal spot.
C)most likely will be visualized with a small radiographic tube angle using a large target angle.
D)all of the above

Question

Quizplus · Accepted Answer

A renal calculus that measures 0.2 mm in size is very small and can easily be hidden by the penumbral overlap, which is created by the use of a small focal spot. To avoid this, an effective focal spot of more than 0.5 mm is needed. Therefore, choice A is the correct answer. Choice B is incorrect because magnification is not necessary for such a small object. Choice C is also incorrect because a small tube angle is needed to decrease magnification, not increase it.

A Renal Calculus That Measures 0