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Medical Imaging > X-Ray > Flashcards

X-Ray Flashcards

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USMLE® Step 1 flashcards
1
Q

Primary indication of X-Ray

A

Exclude lung pathology

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2
Q

In case of PTX, what should you tell the patient?

Expire/Inspire

A

Expire

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3
Q

How to analyze chest X-Ray?

A

Spiral, from outside to center

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4
Q

Chest X-Ray hidden areas

A

Apical zones
Hilar zones
Retrocardial zone
Zone below the dome of the diaphragm

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5
Q

How can we change the penetration of X-Ray?

A

Change the voltage

Change the current

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6
Q

Why are bones white on X-Ray?

A

Dense structures, attenuate a lot of photons

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7
Q

What will result in darker image?

A

High tube voltage

High tube current

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8
Q

In optimal chest X-ray during Inspiration, what should be the level of the diaphragm?

A

Post. arch of the 10-11th ribs

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9
Q

Why will the heart appear larger in AP CXR?

A

It is further away from the detector

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10
Q

Why is supine CXR is not recommanded?

A

Heart will appear larger
Pleural fluids will be spread out
Diaphragm is higher

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11
Q

Increased transparency on CXR can point us towards?

A

PTX

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12
Q

Lung abscess will appear on CXR as

A

Basket handle sign

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13
Q

What is a common cause of PTX (Not trauma)

A

central venous cannulation

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14
Q

Where should the endotracheal tube be placed?

A

2-3 cm above the tracheal bifurcation

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15
Q

When is free peritoneal air a normal finding?

A

After abdominal surgery

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16
Q

What imaging is more sensitive than X-Ray for free peritoneal air?

A

CT

17
Q

CXR is not recommended in this following cases

A

Screening for TB/COPD
Pre-employment screening
Lung cancer screening

18
Q

What is the right way of lung cancer imaging?

A

Low dose unenhanced CT

19
Q

If we suspect rib fructure, what kind of image should we ask for?

A

Rib view

20
Q

When should we get an abdominal X-Ray?

A

Suspected Ileus
Suspected bowel perforation
Foreigb body

21
Q

Does a negative X-Ray rules out:
Suspected Ileus
Suspected bowel perforation
Foreigb body

A

No

22
Q

Lateral decubitus view is also called

A

Frimann-Dahl view

23
Q

GI contrast media for XR

A

Iodine

Barium

24
Q

Which contrast media can cause peritonitis?

A

Barium

25
Q

Which contrast media is concider safe?

A

Iodine based

26
Q

Define Fluoroscopy

A

XR video for the upper GI

27
Q

How can we investigate the biliary tract steenosis or occlusion?

A

Endoscopic Retrograde Cholangio- Pancreatography ERCP

28
Q

Which imaging modality can detect bone fructure also in early stages?

A

MRI

CT

29
Q

Which imaging modality is best for the visualization of Osteomyelitis?

A

MRI

Bone scintigraphy

30
Q

What is the gold standard imaging modality for Nephrolithiasis?

A

Low Dose Non-Enhanced abdominal CT

31
Q

When us XR not indicated?

A

Nephrolithiasis
Head trauma
Paranasal sinus

Medical Imaging (11 decks)

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