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Flashcards in Radiology (Respiratory) Deck (21)
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1
Q

Why does the left hilum lie superior to the right hilum?

A

Anatomical relationship of left and right main bronchi and pulmonary artery is different.

2
Q

Why are hila important on CXRs?

A

They are a common place for bronchial carcinoma to arise and because lymph nodes located there may become visibly enlarged due to disease.

3
Q

What is disease in a lobe often due to?

A

Pathology in the bronchus that ventilates it.

4
Q

What are the common diseases you can see in CXRs?

A

Pneumonia, lobar collapse, pneumothorax, pleural effusion.

5
Q

Why is loss of silhouette a useful sign?

A

It often allows us to determine which part of lung is diseased.

6
Q

What can the lingula of the left upper lobe be considered anatomically equivalent to?

A

The middle lobe in the right lung.

7
Q

How can you detect lobar collapse on a CXR?

A

Collapsed lobe density increases and the adjacent major fissure is dragged out of position.

8
Q

What lines and tubes can CXR confirm the correct placement of?

A

Endotracheal (ET) tubes, nasogastric tubes, central venous lines.

9
Q

Where should an endotracheal tube be positioned?

A

2cm proximal to the carina.

10
Q

Why is it important to look at previous films?

A

A patient might have old scarring and you need to see what is new and is causing their current symptoms.

11
Q

If the CXR is normal on a suspected PE, what is the next scan you should do?

A

V/Q scan.

12
Q

What are the 2 signs on a CT pulmonary angiogram that there is something blocking the pulmonary arteries?

A

Something blocking them, enlargement of right ventricle.

13
Q

How can you see asbestosis on a HRCT?

A

Large chunks of white (bilateral calcified pleural plaques).

14
Q

What is the normal shape of bronchial carcinomas?

A

Spherical or oval.

15
Q

What is the diameter at which a bronchial carcinoma will be visible on a CXR?

A

1cm.

16
Q

What are the signs of a central tumour on CXR?

A

Hilar enlargement, distal collapse/consolidation.

17
Q

What sort of metastases is a PET CT good at detecting and what is it not good at detecting?

A

Good: nodal metastases, distant metastases.
Bad: brain metastases (glucose analogue used, brain uses a lot of glucose anyway).

18
Q

What are the potential complications of a CT guided lung biopsy?

A

Pneumothorax, hitting a blood vessel, air embolus (high mortality).

19
Q

What are 3 respiratory radiological interventions?

A

CT guided lung biopsy, pleural fluid drain, SVC stenting.

20
Q

What 4 things may you think are lung cancer on a CXR but aren’t?

A

Breast augmentation, rib fractures, pleural disease, skin lesions.

21
Q

What is a left thoracoplasty?

A

When they cracked the ribs in to treat TB.