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Thoracic Radiology of the Dog

Dr. LeeAnn Pack

Dipl. ACVR


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Thoracic Radiology of the Dog

• Indications• Technical factors•

Normal radiographicanatomy• P lmonary !asc lat re• Al!eolar l ng pattern• A"C#s• "ronchial L ng Ds

• Cardiology $ PDA $ P lmonic stenosis

$ Aortic stenosis $ %itral ins fficiency $ DC% $ &eart'orm Disease

• Ple ral (ff sion• Primary L ng T mors• P lmonary Nod les• %egaesophag s


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Indications

• Co ghing• Dyspnea

• Cardio!asc lar disease• Thoracic tra ma• Assessment of primary or secondary

neoplasia• Reg rgitation of food• )ther a*normalities detected on P(


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Technical +actors

• Potential for mo!ement $ Lo' mAs

• &igh inherent contrast $ Lo' kVp

• IN,PIRATI)N• Collimation-centering


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Inspiration !s. ( piration


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Normal Radiographic Anatomy

• &eart $ / 0 to 1 0 intercostal

spaces 'ide on lateral!ie' $ 2 345 of the 'idth of the

thora on the VD !ie'

$ 6clock face7 $ L ng lo*es


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Cham*er Location


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P lmonary Vasc lat re

• Cranial p lmonary !essels $ Lateral !ie' $ Artery 8 dorsal9 !ein 8 !entral $ Diameter of !essels at the :th IC, sho ld

not e ceed the diameter of the pro imal

portion of the 1rd

ri*


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Cranial P lmonary Vessels


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P lmonary Vasc lat re

• Ca dal p lmonary !essels• DV !ie'• Artery 8 lateral9 Vein 8 medial• Vessels sho ld not e ceed the diameter

of the ; th ri* 'here they cross it


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Al!eolar L ng Pattern

• &allmark 8 air *ronchograms $ Consolidation 8 al!eoli filled 'ith fl id-cells

• Retains shape $ Atelectasis 8 collapse of al!eolar l ng

space

• Lo*e si


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Air "ronchogram


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Al!eolar L ng Pattern

• Lo*ar sign• , mmation $ s perimposed o!er

cardiac silho ette• %ay not see p lmonary !essels in area

of pattern d e to soft tiss e opacity


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Nice Air "ronchograms


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The A"C#s


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A

• Atelectasis $ =eneral an $ Rec m*ent animals $ Dependent l ng lo*es

affected

• Aspiration pne monia $ Cranial9cranio!entral

l ng lo*es affected $ %egaesophag s $ Post anesthesia


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C

• Cont sion $ &istory of tra ma

$ Ri* fract res $ Distri* tion !aries


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D

• Dirofilariasis $ %ost common ca se

of throm*oem*olicdisease $ Increased l ng

opacity $

%i ed interstitial $al!eolar $ Ca dodorsal

distri* tion


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(

• (dema• CARDI)=(NIC

$ Left heart fail re $ Perihilar9 symmetrical

• N)N>CARDI)=(NIC $ (lectroc tion

$ ,alt 'ater dro'ning $ ,ei< res $ ca dodorsal


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Cardiogenic (dema


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Non Cardiogenic (dema Lateral


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Non Cardiogenic (dema VD#s


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"ronchial L ng Disease


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"ronchial $ RR Tracks


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Don ts


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"ronchial L ng Disease


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+eline Asthma


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+eline Asthma


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Patent D ct s Arteriosis

• (nlargement of the descending aorta• (nlargement also of the

$ %ain p lmonary artery $ Left atri m $ Left a ricle

• Vessels enlarged9 l ngs o!er>circ lated• Poodle9 pom9 collie9 =,D9 sheltie


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PDA


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P lmonic ,tenosis• %alformation of the p lmonic !al!e• (nlargement of the main p lmonic aa

• Right !entric lar enlargement• Vessels normal to small• "eagle9 (nglish " lldog9 ,amoyed9

mastiff9 *o er


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P,


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Aortic ,tenosis

• Narro'ing of the s *!al! lar region ofthe left !entricle

• Aortic arch enlarged• Left !entricle enlarged• Vessels normal• =,D9 Ne'fo ndland9 "o er9 golden

retrie!er9 rott


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A,


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%itral Ins fficiency• Primary degeneration of the mitral !al!e

leaflets• Reg rg thro gh the !al!e left atrial

enlargement• P lmonary !eins enlarged• P lmonary edema d e to left heart

fail re


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%itral Ins fficiency


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,plitting of the %,"


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Compression at Carina


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DC%


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DC%


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Pericardial (ff sion


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&eart'orm Disease

• Dilated9 tort o sp lmonary arteries

• Right sided heartenlargement• Re!erse D shape• DV radiograph to

see ca dal !essels


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Ple ral (ff sion

• +l id in the ple ral space• ( date9 trans date or modified

trans date• Appearance is sam regardless of the type• Es ally *ilateral• +iss re lines9 retraction of l ngs9

silho etting of heart and diaphragm


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Ple ral (ff sion $ VD !s. DV


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here Is the &eartF


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Ple ral (ff sion $ C%% PresentF


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Primary L ng T mors

• Es ally large solitary• Ca dal l ng lo*es s ally• Adenocarcinoma• "ronchogenic carcinoma• ,? amo s cell carcinoma• %alignant histiocytosis


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P lmonary Nod les


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=enerali


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,egmental %( > , r!eys


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,egmental %( > Contrast


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hat Do @o ,eeF


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Chest Rads $ ,ame Dog


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Thoracic Radiology in the Dog

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