CLINICAL MEDICINE

MEDICINE

RADIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A variation in the true size and shape of the object being radiographed is termed:
A
sharpness.
B
distortion.
C
resolution.
D
magnification.
Explanation: 

Detailed explanation-1: -Dimensional distortion of a radiographic image is a variation in the true size and shape of the object being radiographed. A distorted image results from the unequal magnification of different parts of the same object. Distortion results from improper film alignment or beam angulation.

Detailed explanation-2: -Image Distortion It refers to the variation in the true size and shape of the object being recorded. It may occur due to unequal magnification of different parts of the same object.

Detailed explanation-3: -Size distortion is magnifying the anatomical structure and is usually caused by an increased object-to-image receptor distance or decreased distance between the source of radiation and the image receptor. This phenomenon causes the object to look larger than it is in reality.

Detailed explanation-4: -Distortion may consist of, (1) true distortion, in which the shape of the object shown is distorted or twisted from its true shape, or (2) magnified distortion, in which the size of the object shown is magnified or increased in size.

Detailed explanation-5: -focal spot. anode angle. heel effect. off focus radiation. 03-Mar-2018

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