Distortion

Question 1

change in size and shape of the object as seen on the radiograph

Answer 1

distortion

Question 2

is the misrepresentation of the size and/or shape of the anatomic part of interest

Answer 2

distortion

Question 3

any geometric misrepresentation of an anatomical structure on an image receptor that alters its true size and/or shape

Answer 3

distortion

Question 4

a type of size distortion

Answer 4

magnification

Question 5

2 types of shape distortion

Answer 5

elongation
foreshortening

Question 6

is the enlargement of the recorded image from the actual size of the object

Answer 6

size distortion or magnification

Question 7

occurs whenever the OID is greater than 0

Answer 7

magnification

Question 8

uses magnification as an advantage

Answer 8

magnification radiography

Question 9

under the magnification

Answer 9

SID
OID

Question 10

The shorter the OID, the ______ the degree of magnification

The longer the OID, the ______ the magnification

Answer 10

The shorter the OID, the LESSER the degree of magnification

The longer the OID, the GREATER the magnification

Question 11

The longer the SID, the ________ the degree of magnification.

The shorter the SID, the __________ the magnification.

Answer 11

The longer the SID, the LONGER the degree of magnification.

The shorter the SID, the SHORTER the magnification.

Question 12

indicates how much size distortion or magnification is demonstrated on the radiograph

Answer 12

magnification factor

Question 13

MF of 1.10 means that the image is __% larger than the actual size of the object

Answer 13

MF of 1.10 means that the image is 10% larger than the actual size of the object

Question 14

MF of 1 indicates __ _____________

Answer 14

MF of 1 indicates NO MAGNIFICATION

Question 15

can be determined if MF is known or with the use of triangle formula

Answer 15

object size

Question 16

180 cm or 72”

Answer 16

chest radiography

Question 17

100 cm or 40”

Answer 17

routine examinations

Question 18

90 cm or 35”

Answer 18

special studies

Question 19

50-70 cm

Answer 19

general mammography

Question 20

unequal magnification of different portions of the same object

Answer 20

shape distortion

Question 21

when the image appears to be shorter than the actual shape of the object

Answer 21

foreshortening

Question 22

↑ inclination = _ foreshortening

Answer 22

↑ inclination = ↑ foreshortening

Question 23

when the image appears to be longer than the actual shape of the object

Answer 23

elongation

Question 24

an inclined object positioned lateral to the central ray may either be ____________ or __________

Answer 24

an inclined object positioned lateral to the central ray may either be FORESHORTENED or ELONGATED

Question 25

occurs when multiple objects are positioned in various OIDs, each object will have varying degrees of distortion

Answer 25

spatial distortion

Question 26

↓ SID = _ magnification ↑ OID = _ magnification

Answer 26

↓ SID = ↑ magnification ↑ OID = ↑ magnification

Question 27

caused by angulation along the long axis of the part

Answer 27

elongation

Question 28

↑ tube/part/film angulation = _ elongation ↑ tube/part/film alignment = _ elongation

Answer 28

↑ tube/part/film angulation = ↑ elongation ↑ tube/part/film alignment = ↓ elongation

Question 29

caused by angulation against the main axis of the part

Answer 29

foreshortening

Question 30

structures within the body lie at varying distances from the xray image receptor, producing varying degrees of magnification

Answer 30

structural position

Question 31

organs farther from IR = _ magnification

Answer 31

organs farther from IR = ↑ magnification

Question 32

is accompanied by changes in image density as a result of differing thicknesses traversed by the x-ray beam

Answer 32

blur