Questions

What is the most likely diagnosis?

Which of the following is the most common cause of isolated free fluid on CT in trauma patients? 

When considering the injuries caused by gunshots, which factor does NOT affect the type and severity of injury?

What is the most common cause of an enlarged cardiac silhouette on a PA chest x-ray? 

Which of the following will provide the most accurate measurement of the cardiothoracic ratio? 

When visually assessing CT perfusion maps (without the aid of automated software) ischemic infarct core is best delineated by which of the following parameters?

In cerebral ischemia, the ischemic penumbra is best defined by which of the following combination of parameters?

Which of the following changes in CT perfusion parameters is NOT consistent with an ischemic penumbra? 

In the accompanying axial image from a non-contrast CT of the brain, white matter is indicated by which letter?

In the accompanying axial image from a non-contrast CT of the brain, muscle is indicated by which letter?

In the accompanying axial image from a non-contrast CT of the brain, cerebrospinal fluid (CSF) is indicated by which letter?

In the accompanying axial image from a non-contrast CT of the brain, grey matter is indicated by which letter?

In the accompanying axial image from a non-contrast CT of the brain, blood is indicated by which letter?

In the accompanying axial image from a non-contrast CT of the brain, bone is indicated by which letter?

Pott disease is caused by which of the following? 

An elderly, otherwise well, individual presents with a headache and is investigated with an MRI. What is the most likely diagnosis?

A 50-year-old woman presents with a gradual decline in cognitive function and is investigated with an MRI. Which of the following most likely describes their cognitive deficit?

A 65-year-old female with a proven glioblastoma (IDH-1 wild-type, MGMT methylated) undergoes Stupp protocol combined chemoradiotherapy. Two months after completion of radiotherapy, a follow-up MRI demonstrate a substantial increase in size of a peripheral enhancing component with abundant surrounding vasogenic edema resulting in mass effect. The enhancing component has low cerebral blood volume and spectroscopy demonstrates a dominant lipid and lactate peak, with minimal choline or NAA. 

What is the most likely diagnosis?

This 3-month old boy presents with increasing head circumference. He underwent a cranial ultrasound. What is the most likely diagnosis? 

A 4 month-old girl presents with a large mass within the trigone of the lateral ventricle, with associated hydrocephalus. Which of the following is the most likely diagnosis?