Radiology MRI

  Welcome back to the blog. Following up on my previous posts, Monkey looking at cerebellum and Small  Vestibular Schwannoma , I have just published a new companion video on the Radiant Pixels YouTube channel that brings these concepts to life. If you are looking to sharpen your diagnostic skills regarding internal acoustic canal pathology and anatomy, this case presentation is for you. What to Expect in the New Video In this latest upload, I walk through a classic presentation of a 75-year-old patient experiencing left-sided hearing loss. We review the imaging step-by-step, starting with the thin-slice T2 sequences that are highly sensitive for evaluating the internal acoustic canals, all the way through to the contrast-enhanced T1 coronal slices. Key highlights of the case include: Identifying a normal vascular AICA-loop at the level of the porus acusticus and understanding when to note it for the clinician. Locating and measuring a small 5 mm by 3 mm dark structure plugge...

  Evolution of Hemorrhagic Infarctions on MRI Welcome to another intriguing radiology case study. In our latest release on the Radiant Pixels YouTube channel, we dive into a comparative MRI analysis of an 80-year-old patient, examining scans taken five months apart. This case provides a fantastic look at the evolution of subacute infarctions and the often-perplexing behavior of contrast-enhancing areas over time. The Initial Findings and the Mystery Enhancement The baseline exam reveals distinct areas of tissue loss and gliosis, accompanied by contrast enhancement in the medial parts of the right occipital lobe. We also observe similar, smaller contrast-enhancing areas in the right lateral frontal lobe, specifically at the level of the inferior frontal gyrus. The initial radiological report strongly suggested these locations were indicative of subacute to old infarctions within the posterior cerebral artery territory. However, the persistent contrast enhancement presented a specif...

  I have just uploaded a new video case to the   Radiat Pixels   YouTube channel, highlighting a fascinating and critical late complication of oncological treatment that every radiologist should keep on their radar. Case Overview In this week's video, we review the neuroimaging follow-up of a 33-year-old patient. The clinical timeline is key here: this patient underwent surgical resection and subsequent therapy for a medulloblastoma during childhood. Crucially, a follow-up control exam performed when the patient was 19 years old was completely clear, showing no signs of tumor recurrence and no vascular abnormalities. Now, at 33 years of age, the latest follow-up imaging reveals the distinct development of a new cavernous malformation. The Core Teaching Point The primary takeaway from this case is a vital reminder for long-term follow-up imaging:   Cavernomas can be radiation-induced. Radiation-induced cavernous malformations (RICMs) are a well-documented, delayed com...

  New on Radiant Pixels : Spotting an MVNT in a Suspected Epilepsy Case Welcome to   Radiant Pixels , my brand-new YouTube channel dedicated to fascinating radiological cases and imaging insights! In our latest video, we are diving deep into a compelling neuroimaging workup of an adult patient being investigated for a possible epilepsy focus. The Case Breakdown Initial investigations started with a standard CT scan, which was entirely negative. However, the MRI painted a much more detailed and intriguing picture. During the read, we isolated a very specific lesion with the following characteristics: Location:   Juxtacortically adjacent to the right gyrus cinguli. Morphology:   A distinct, micro-bubbly and nodular appearance. Edema:   Absolutely no perifocal edema present. Vascularity & Enhancement:   No pathological vessels and zero contrast enhancement. The Diagnosis For radiologists, these specific imaging hallmarks—particularly the juxtacortical bubb...

Welcome back to the blog! I am expanding the ways we explore radiology together with the launch of my new YouTube channel,   Radiant Pixels . To kick things off, the latest video features a classic but highly educational case of a   Pituitary Macroadenoma   (a benign tumor measuring >1 cm). In this visual walkthrough, we focus on the crucial anatomical landmarks and how to systematically assess the tumor's boundaries on MRI. The main teaching points covered in the video include: The Optic Chiasm:   Assessing for superior extension and chiasmal compression, which is vital for correlating with visual field deficits like bitemporal hemianopsia. The Cavernous Sinus:   Evaluating the degree of lateral invasion and understanding the implications for the internal carotid artery and adjacent cranial nerves. Normal Pituitary Remnants:   Identifying the displaced, compressed normal gland tissue to properly differentiate the adenoma from other sellar and parasellar...

  Following our previous discussion on the clinical presentation of Chronic Subdural Hematoma (cSDH) and its appearance on CT, today we're going a step further. We'll utilize specific MRI sequences and CT correlation to gain a more detailed understanding of the signal characteristics of cSDH and, crucially, to properly visualize the anatomy of the subdural space, which is typically just a potential space but becomes strikingly apparent in this pathology. All the images we'll examine today are from the same patient, providing a comprehensive, multi-modal overview of their diagnosis. Expanding the Potential Space: The T1 Signal Characteristics We begin our detailed look with an enlarged axial T1-weighted image. T1 sequences are excellent for anatomical detail and can sometimes help characterize fluid based on its protein content and hemorrhagic degradation products. In this image, you can clearly see a fluid collection expanding along the cerebral convexity. The key takeaway ...