Thoracic imaging Flashcards Preview

VSCI300 MOD > Thoracic imaging > Flashcards

Flashcards in Thoracic imaging Deck (25):
1

what is the best setting to prevent respiratory movement on the xray

high kVp
low mA

2

how should you interpret an xray - 3 stages

1. assess overall - quality, phase of resp and BCS
2. systematic approach - ribs, mediastinal dz, tracheal dz
3. norm/abn

3

what effect might obesity have upon appearance of xray?

wide mediastinum
inc lung obacity

4

what is the sign of the psoas muscle in cats

cuts off the cd-d edge of the thoracic cavity

5

how do you descr an abnormality

inc or dec opacity (inc fluid/cell or less air?)
where is it (compartment)

6

desc the signs of a pleural effusion

border effacement of the heart and lung and diaphragm
retraction of lung margins

7

what does pneumothorax look like

air (lucent) in pleural space
retraction of lung margins
cardiac sill lifted from sternum

8

mediastinal masses are common (in rabbits espesh fyi), what structures are in the mediastinum

trachea
oesoph
heart
g vessels
LN sternal

9

how can you ID mediastinal masses

displacement of other structures
widen of DV

10

what are the 4 main desc of lung patterns on xray

bronchial (obv walls+)
alveolar
interstitial
vascular

11

what are some reason for decreased lung opacity give examples of both diffuse and focal causes

diffuse - pneumothorax, s/c emphysema, hyperinflation
focal - thromboembolism, emphysema, lung lesion which has ruptured

12

name some charactertic lesions for cr-v, generalised and cd-d regions of the lobes

cr-v = aspiration pneumonia
generalised = fribrosis, broncitis, atelectasis
cd-d = oedema

13

name some causes of bronchial lung pattern

calcification
chronic bronchitis
peribronchial cuffing - oedema
bronchiectasis

14

name some causes of alveolar lung pattern

diffue = pneumonia, oedema. haem++
focal = atalectasis, lobe torsion (or as above)

15

what might you see when there is an alveolar pattern

air bronchograms

16

mostly an interstitial pattern is artefact but what can cause a genuine one

- neoplasia
- nodular type or diffuse
- misrecognised pulmonary oesteomata (irreg mineralisation)

17

what is the vertebral heart score

way of assess size from radiograph

18

what is a radiography sign of LHS Cfailure

cd border of heart becomes squared off.
dislacement of mainetm bronchi

19

what is a radiographic sign of RHS c failure

rounded on RHS (reverse 'D')
inc sternal contact
more of the heart of the RHS of the body than norm

20

which pulmonay vessels can be assessed in C+D

cranial and caudal lobar vessels (usually same width as ribs nearest them)

21

desc the appearance on xray of a dog with mitral vale dz

- small breeds
- --> LA enlargement
- puml oedema

22

desc the appearance of DCM on xray

- larger breeds
- cardiomegaly++
- LA and RHS enlargmen

23

what is reverse PDA

pulmonary hypertension which leads to RHS enlargement (cor pulmonale) and POS R-->L flow if v bad

24

what is the most common vascular ring anomalie

persistent RAA
tracheal displacment, megaoesoph

25

how can micro-cardia occur

hypovolaemia and -- hypovascular lung