image analysis

Question 1

image analysis

Answer 1

-he evaluation of radiographic images for acceptability
-meet ARRT tech standards, proper quality
-decrease financial cost, malpractice suits and misdiagnosis
-no repeats, less radiation exposure and reduce scatter

Question 2

elements of radiograph

Answer 2

-orientated correctly?
-all anatomy included?
-proper position?
-collimation?
-marker included?
-visibility and resolution ?
-artifacts?

Question 3

orientation

Answer 3

way the picture is displaced
-always want left on my right and right in my left
-always in anatomical position
-fingers, toes, chest PA must be up
-lateral to the side

Question 4

anatomy of interest

Answer 4

what has to be included
-must have apices down to the costapherenic angles

Question 5

positioning

Answer 5

right position
-parallel to the image plate
-no bending unless required

Question 6

geometric integrity

Answer 6

making sure theres no distortion
-distortion is foreshortening or elongation
-distortion; part not parallel w/ IR

Question 7

centering

Answer 7

proper exposure w/ proper positioning
-centering creates proper exposure
-good for visibility of joint spaces

Question 8

collimation

Answer 8

good collimation means good exposure
-finger is closed collimation
-heel is small collimation
-protects patients from unneeded exposure, protects techs from scatter, creates good quality

Question 9

markers

Answer 9

every image needs a marker
-left an right marker needed in every image

Question 10

visibility

Answer 10

brightness or contrast
-high contrast: black and white
-we like greys
-contrast can be dye, xray, CT, etc

Question 11

resolution

Answer 11

sharpness and image detail
-motion shows blurriness

Question 12

artifacts

Answer 12

can be many things such as wires, snaps from gown, etc
-mark artifacts in document if they cannot be helped

Question 13

EI

Answer 13

exposure index: must be between 100-300
-dont repeat if its over 300

Question 14

repeating image

Answer 14

technologist must use critical thinking to determine how to sufficiently fix the errors before re-exposing the patient

Question 15

factors that affecting acceptability

Answer 15

visual acuity/perception
-radiologist and physician preferences
-exam and demands vs patient ability

Question 16

visual acuity

Answer 16

lighting, pathology, viewing distance, misperception

Question 17

patient ability

Answer 17

-acceptable vs not acceptable
-documentation is key
-tube can move enough for us to get a good picture

Question 18

PA CXR merrils

Answer 18

-evidence of proper collimation and marker
-entire lung fields from apices to costophrenic angles
-no rotation: sternal ends of the clavicles equidistance from vertebral column
-trachea visible in the middle
-equal distance from the vertebral column to the lateral border
-proper anterior shoulder rotation
-proper inspiration (10 ribs)
-sharp outlines of the heart and diaphragm
-pulmonary vascular markings
-lung markings

Question 19

Left lateral CXR

Answer 19

-collimation and anatomy of interest
-arm or soft tissue not in lung field
-angles
-not rotation
-hilum in the approximate center
-super imposition of the ribs posterior to the vertebral column
-sternum in profile
-trachea visible in the midline
-long axis of the lung fields demonstrated in the vertical position
sharp outlines of the heart and diaphragm
-open thoracic intervertebral soaces and firamina