Stefan Tigges on Radiopaedia.org

Stefan Tigges

Professor of Radiology, Emory University School of Medicine

Thoracic Radiologist interested in education and using comics/drawing to teach. No pharmaceutical or medical device conflict of interest.

Disclosures:
  • Nothing to disclose
169 results found
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Question 2217

A 60-year-old woman with a 50 pack-year history of smoking presents with a cough. Based on the history and the chest x-ray findings, what is the most likely type of and reason for the right upper lobe atelectasis?

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Question 2288

What finding is present on this radiograph that demonstrates the tendency of the chest wall to expand?

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Question 2289

What is most likely reason for the diffuse hazy right hemithorax opacity in this trauma patient?

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Question 2290

What is the most likely reason for complete opacification of this patient's left hemithorax?

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Question 2291

What finding makes empyema a more likely diagnosis in this case than pulmonary abscess?

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Question 2292

What finding makes pulmonary abscess a more likely diagnosis in this case than empyema?

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Question 2293

The "holly leaf" sign localizes these calcifications to which part of the thorax?

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Question 2294

What 2 findings besides volume loss and a round shape are characteristic of round atelectasis?

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Question 2295

Involvement of what anatomic structure differentiates asbestosis from asbestos exposure?

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Question 2296

What is the most likely diagnosis in this patient with a pleural malignancy? 

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Question 2297

Which radiopharmaceutical would be helpful to confirm suspected splenosis? 

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Question 2307

Why does blood appear white on a head CT?

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Question 2308

What normal finding on a head CT has an HU measurement closest to zero?

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Question 2309

What two vessels does the posterior communicating artery connect?

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Question 2310

At what level do most fibers of the corticospinal tract cross?

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Question 2311

In what vascular territory/s has infarction occurred in this patient?

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Question 2312

Blood within cerebral sulci is located in which space?

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Question 2313

What is the most likely diagnosis for the abnormality present on this post-contrast head CT in this 45-year-old woman who presents with a headache?

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Question 2314

What observation is most important in correctly classifying this mass as intra-axial?

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Question 2315

Effacement of which structure is characteristic of transtentorial herniation?