1 / 12

Principles of Interpretation

Principles of Interpretation. Dr. LeeAnn Pack Dipl. AVCR. It’s Magic. Imagination if more important than knowledge…. Viewing the Radiographs. Quite, dark room, no distractions At least 2 well lit view boxes Hot light should be available 3 dimensional concept

florence-marcus
Télécharger la présentation

Principles of Interpretation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Principles of Interpretation Dr. LeeAnn Pack Dipl. AVCR

  2. It’s Magic Imagination if more important than knowledge….

  3. Viewing the Radiographs • Quite, dark room, no distractions • At least 2 well lit view boxes • Hot light should be available • 3 dimensional concept • From a 2 dimensional image the 3rd dimension must be constructed • Orthogonal views • Anatomy text, anatomical specimens, notes

  4. Viewing the Radiographs • Radiographs should be placed on the view box the same way every time • Laterals • Animal’s head to the viewer’s left • Spine is at the top • VD or DV • Animal’s head is at the top • Animal’s right is to the viewer’s left

  5. Viewing the Radiographs Limbs • Lateral and Obliques • Proximal is to the top • Cranial or Dorsal is to the viewer’s left • Dorsopalmar / dorsoplantar • Proximal is to the top • Lateral can be to the viewers right or left • I usually place them as if the patient were laying in front of me

  6. The Radiograph • Ensure the image is of the correct patient • Images are correctly labeled • High technical quality – adequate collimation, exposure, development and are free of artifacts • Is it normal, abnormal, artifactual?

  7. Radiographic Opacities • Metal • Mineral – Bone • Soft tissue – fluid • Fat • Air

  8. Evaluating the Radiograph • Take into account the patient history and clinical signs • Does an abnormality exist? • Perception of abnormal • Where exactly is the abnormality? • Describe the roentgen signs • Opinion • Rule out list of prioritized differentials

  9. Roentgen Signs • Size • Shape • Margination • Number • Change in position • Alteration in opacity • Change in function of organs • Roentgen signs should be correlated with history, physical exam, disease patterns, pathogenesis etc.

  10. Other • Summation – same opacity do not touch but are superimposed  the opacity where they overlap is increased • Silhouette sign – structures of the same opacity touch and their margins are lost • Contrast Media • GI, GU, neuro etc.

  11. Pitfalls to Interpretation • Do not get distracted by a large mass for example and forget the rest of the radiograph • Tunnel vision • Must use a systematic approach - every time

  12. Summary • Properly displayed, Viewing environment, technical quality • Normal or abnormal – must know anatomy • Systematic evaluation and correlation with clinical data • Correct diagnosis or send to someone for help

More Related