Diagnostic Imaging Midterm

What is the radio graphic projection used here?

Craniocaudal of thoracic limb

What is the radio graphic projection here:

Dorsopalmar of carpus

Describe the radio graphic projection here

Ventrodorsal of thorax

How are lateral radiographs named?

Based on which side the patient is laying on

Describe the standard manner of viewing for dorsoventrally/ventrodorsal projections

-Patients head/cranial aspect of patient points UP

-Patients left oriented to interpreters right

When viewing lateral projections the standard method of viewing is to have the cranial aspect of the patient to the interpreters ____

Left

The more rays that hit the plate the _____ the image

Darker (radiolucent)

What’s your diagnosis?

Gastric dilation volvulus

What are some of the main pitfalls of 2D images of 3D structures

-magnification/distortion

-superimposition

-silhouetting/border effacement

What structures get magnified in XRay

Further from the detector (closer to the beam/further from the plate)

Why should you not measure kidneys on lateral projection

Magnification, unequal due to non-parallelism

What is positive summation

Radioopaque structures overlie each other in same plane

What is negative summation

Radiolucent structures overlie in same plane

When looking at superimposition (summation) structure do not ___

Touch each other

What is silhouetting/border effacement?

Two structures of the same opacity which do contact each other = lose ability to distinguish margins

What are roentgen signs

Size

Shape

Location

Number

Marination

Opacity

Describe these finding as using roentgen signs

There are numerous, small, smooth, round, radioopaque structures visualized within the urinary bladder