Welcome to PICU Doc On Call, A Podcast Dedicated to Current and Aspiring Intensivists.I'm Pradip Kamat coming to you from Children’s Healthcare of Atlanta/Emory University School of Medicine and I'm Rahul Damania from Cleveland Clinic Children’s Hospital. We are two Pediatric ICU physicians passionate about all things MED-ED in the PICU. PICU Doc on Call focuses on interesting PICU cases & management in the acute care pediatric setting so let’s get into our episode.Here's the case of a 12-week-old girl old who is limp and seizing presented by Rahul.Chief Complaint: A 12-week-old previously healthy female infant was found limp in her crib and developed generalized tonic-clonic seizures on the way to the hospital.History of Present Illness: The mother returned from work on a Saturday to find her daughter unresponsive in her crib. The infant had been left in the care of her mother's boyfriend, who stated that the daughter had been sleeping all day and had a small spit up. As the patient continued to have low appetite throughout the day and continued to be unresponsive in her crib, mother called EMS to bring her to the emergency department. En route, the patient had tonic movement that did not resolve with intranasal benzodiazepines.ED Course: The infant presents to the ED being masked. Upon arrival at the ED, the infant was in respiratory distress, with a heart rate of 190 beats per minute, respiratory rate of 50 breaths per minute, and oxygen saturation of 85% with bagging. She was intubated for seizure control upon arrival at the ED. Physical examination in the ED revealed bruising on the right neck region but was otherwise unremarkable. A non-contrast head CT showed no acute intracranial abnormalities. The initial diagnostic workup revealed normal CBC, mildly elevated hepatic enzymes, and pancreatic enzymes which were within normal limits. The blood gas showed metabolic acidemia with PCO2 in the 60s.Admission to PICU: Upon admission to the PICU, neurosurgery and trauma teams were consulted. A skeletal survey and ophthalmology consult for a fundoscopic examination were ordered, as there were concerns of non-accidental trauma. Further investigation is underway to determine the cause of the infant's condition.To summarize key elements from this case, this patient has:Patient left with mother's boyfriendInfant found limp and had seizures requiring intubationNeck bruiseAll of these bring up a concern for Non-Accidental Trauma (NAT) the topic of our discussion.Let's start with a short multiple-choice question:Which imaging modality is the most appropriate for establishing a diagnosis of abusive head trauma (AHT) in a 12-week-old infant with an open fontanelle on the exam?A. CT scan of the brain without contrast B. MRI of the brain without contrast C. Skull X-ray D. Doppler ultrasound of the headRahul, the correct answer is A. Though