Posts

MELAS — Stroke-like Lesions

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A patient with a known family history of MELAS (Mitochondrial encephalomyopathy, lactic acidosis, and stroke-like episodes) presented with new neurological symptoms. On initial CT brain, there was a low-attenuation lesion in the right frontoparietal centrum semiovale that resembled a lacunar infarct. However, a follow-up MRI revealed: • The lesion was hyperintense on DWI, but without corresponding ADC restriction — this indicates vasogenic edema rather than cytotoxic edema, which is not typical for an acute infarction. • There was also evidence of old cortical volume loss in the same hemisphere, in the temporal lobe suggesting previous stroke-like episodes. • Importantly, these lesions do not follow a specific vascular territory. This pattern — recurrent, stroke-like lesions that spare strict vascular distributions and lack classic infarct diffusion restriction — is characteristic of MELAS. The underlying cause is mitochondrial dysfunction leading to metabolic failure and l...
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Tips for removing markers of vertebral bodies in SECTRA IDS7

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Sometimes it happens that you get the last vertebral body number placement wrong or you do not double click with correct speed. Tips: You can remove the last marked vertebral body using BACKSPACE key on your keyboard. This way you do not have to start over. But the numbers have to be still active showing white square. See example of this T4 that can be removed by using BACKSPACE.
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Herniated Lumbar Disk MRI

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  T2 sequences showing right sided paramedian disk herniation at L5-S1 level compressing right nerve root S1 in the lateral recess. No spinal stenosis. See my YouTube Short Video
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Spinal Canal Schwannoma

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  A case of a young patient with incidental finding of an intra-dural extra-spinal Schwannoma. Tumor enhances mostly in the periphery, is well defined and shows high signal on T2 sequences. Tumor compresses conus. Note fine outcome on the control study 6 months after operation (on the right) with no residue tumor and fine remodelling of the conus.  See also my YouTube Short . 
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Vitamin B12 deficiency related subacute combined degeneration of the spinal cord

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  Young patient diagnosed with vitamin B12 deficiency showing classical inverted V sign in the posterior part of the cervical spinal cord that indicates Subacute Combined Degeneration of the spinal cord.  See also my YouTube Short :
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X-mas presents from AI

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I asked ChatGPT-4: "Can you make me an image of a simulated Lego set of an MRI Scanner. Show it in foreground with its box behind."  This is what I got:  This image was generated by AI called Dall-E that is subdivision of ChatGPT. It looks pretty impressive! It would certainly be a great present for X-mas! I was inspired to make this prompt after seeing the image below that i found on X, that also looks like generated by AI.  I think capabilities of AI in the field of Radiology are pretty impressive!  But honestly I was even more impressed when I asked ChatGPT to spot the difference between two images I took in my garden. It did the great job and this is quite promising example of how can AI be used in Radiology. See the images for yourself first and spot the difference:  And now look at result of AI analysis: As a fun task I asked AI to make me an image of a cat sitting on top of aquarium - something I'm used to see in my office. Here is what I got: I think it'...
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Non-Ketotic Hyperglycemic Hemichorea - Diabetic Striatopathy

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Non-Ketotic Hyperglycemic Hemichorea (NKHH), also known as Diabetic Striatopathy, is a rare neurological disorder predominantly observed in patients (mostly Asian elderly women) with uncontrolled diabetes, usually type 2. It is characterized by involuntary, irregular, and unpredictable movements, primarily affecting one side of the body (hemichorea). The condition is linked to hyperglycemia without ketosis and often involves alterations in the basal ganglia's striatum (comprising the caudate nucleus and putamen). A 49-year-old Caucasian male with a history of type 1 diabetes presented with characteristic symptoms of hemichorea. This case is particularly noteworthy given the patient's background, as NKHH predominantly affects older individuals with type 2 diabetes. Radiological Findings: CT and MRI Analysis Image 1: Initial CT and MRI The first CT scan, performed without contrast, revealed diffusely increased signal intensity in the putamen , more pronounced on the right. The su...
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