What is the most likely cause of this acute cerebral infarct?

All the following points may be the etiologies of bilateral and symmetrical sacroiliitis EXCEPT...

Which statement regarding aortic intramural hematoma (IMH) is FALSE?

How would you classify this type of aortic dissection?

What type of inflammatory enteritis often involves multiple vascular territories and the genitourinary system?

Regarding takotsubo cardiomyopathy, which of these is true?

A 12-year-old boy with a history of intellectual disability comes to the emergency department because of headaches and more frequently occurring seizures. Brain imaging (CT scan and MRI) shows a heterogeneous intraventricular mass measuring about 18 mm near the foramen of Monro,  with internal calcifications and marked contrast enhancement. Subependymal nodules and cortical tubers are the other imaging findings. Which of the following is the most likely diagnosis?

A 7-year-old boy with a history of intellectual disability and seizures comes to the emergency department because of headaches and more frequently occurring seizures. CT scan of the brain shows subependymal nodules with calcification, cortical foci with loss of the grey-white matter distinction, and a nodule partially obstructing the foramen Monro. Which of the following is the most likely diagnosis?

In cardiac PET-CT, when using F-18 FDG to investigate cardiac sarcoid, a cardiac fasting protocol is used to switch myocardial metabolism from glucose to fatty acids. How long should the patient fast for?

All of the following regarding point of care ultrasound (POCUS) to guide NG tube insertion are true EXCEPT...

A 12-year-old boy presents with reduced visual acuity and during workup has an MRI. The right optic nerve is expanded all the way back to the chiasm which is also enlarged. Given the likely diagnosis, what is the most likely underlying condition?

According to the WHO Classification, Group 1 pulmonary hypertension includes which of the following etiologies?

All the following may be considered as risk factors for developing a brain abscess EXCEPT...

A 75-year-old female presents with bilateral hand pain. PA hand x-rays are shown. What is the most likely diagnosis?

In phase contrast MR angiography (PC MRA), blood flowing at 50cm/s through a slice exhibits 180 degrees of phase change after being exposed to the bipolar phase gradients. What is the velocity encoding (VENC) value that has been used in this sequence?

Amplification of signal generated from ultrasound echoes returning from deeper tissues is known as what?

Which of the following will increase the maximum velocity a pulse wave Doppler machine is able to accurately detect?

Which of the following parameters can NOT be assessed on an arterial spectral waveform in a healthy patient?

Which of the following ultrasound modes has the shortest spatial pulse length (best axial resolution)?

Which autoimmune disorder is least likely to cause interstitial lung disease?