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Frank Gaillard on Radiopaedia.org

Frank Gaillard ◉ ◈

MBBS, MMed, FRANZCR, Hon. FRCR

Associate Professor Frank Gaillard is the Founder and Editor in Chief of Radiopaedia.org, which he began in December 2005. He is also a neuroradiologist at the University of Melbourne Department of Radiology of the Royal Melbourne Hospital in Australia.

In 2021, in recognition of his contribution to radiology education, he was made an Honorary Fellow of the Royal College of Radiologists (UK).

Disclosures:

Nothing to disclose

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40 results found

Question 319

What are the usual MRI signal characteristics of the liquid center of a typical bacterial cerebral abscess?

Question 460

If you were to review the apparent diffusion coefficient (ADC) maps of the adjacent study, what values (measured in units x 10^-6 mm²/s) would you expect to encounter in the area of abnormality?

Question 463

What is the approximate expected apparent diffusion coefficient (ADC; x 10^-6 mm²/s) of normal white matter?

Question 464

What is the approximate expected apparent diffusion coefficient (ADC; x 10^-6 mm²/s) of cerebral spinal fluid (CSF)?

Question 541

What type of MRI sequence is shown in the attached image?

Question 542

What type of MRI sequence is shown in this image?

Question 590

What is the MRI sequence depicted in the accompanying image?

Question 591

What is the MRI sequence depicted in the accompanying image?

Question 622

What is the relationship of the probability of Compton scattering per electron and atomic number (Z)?

Question 646

What is the radiation weighting factor for x-rays for radiation protection purposes?

Question 706

Which of the following panels in the accompanying collage of axial MRI images of the brain demonstrates a T1 weighted sequence?

Question 707

Which of the following panels in the accompanying collage of axial MRI images of the brain demonstrates a FLAIR sequence?

Question 708

Which of the following panels in the accompanying collage of axial MRI images of the brain demonstrates a susceptibility weighted sequence (SWI)?

Question 709

Which of the following panels in the accompanying collage of axial MRI images of the brain demonstrates a time of flight MRA sequence?

Question 710

Which of the following panels in the accompanying collage of axial MRI images of the brain demonstrates a diffusion weighted sequence (DWI)?

Question 711

Which of the following panels in the accompanying collage of axial MRI images of the brain demonstrates a T2 weighted sequence?

Question 768

What is the name of this MRI artifact?

Question 769

The small rounded region of hyperintensity within the pons is an example of which of the following MRI artifacts?

Question 770

The accompanying image is an example of which MRI artifact?

Question 771

The accompanying image demonstrates which MRI artifact?

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