-

Hi, Welcome to my blog.

Popular posts from this blog

Hemorrhagic Choroid Plexus Cyst

-
Image
Transversal Diffusion Weighted sequence shows high signal in the left choroid plexus with corresponding low signal on ADC (restricted diffusion). Finding represents acute Hemorrhagic Choroid Plexus Cyst . It is also known as Choroid Plexus Xanthogranuloma . Gradient Echo sequence (third image) shows low signal in the right choroid plexus representing hemosiderine deposits after previous hemorrhage. Coronal T1 shows intermediate to high signal in the plexus cyst. Note also low signal in the right plexus on T2 (old hemorrhage) and high signal on FLAIR in the left plexus (acute hemorrhage). Choroid Plexus Cysts are very common normal finding. Those often show restricted diffusion. However in our case of patient with hypertension this finding is of interest to the clinicians as a requirement to more closely monitor patient's blood pressure. There were no signs of intraventricular hemorrhage.
Read more

CT Pelvimetry - Bäckenmätning

-
Image
Below is a short summary of the protocol for Pelvimetry (Bäckenmätning in Swedish). First a thick MIP is reconstructed on the scanner that covers whole pelvis. A line is drawn on the scanner that is later used for calibration on PACS workstation. Calibration of the previously measured line. On the above MIP the Transversal Inlet Diameter (Transverstingångsmått) is measured as the largest transversal distance in the pelvic inlet. As well as Intertubar Diameter (Intertubaravstånd) as distance between  ischial tubers . On sagittal reconstruction measure Sagittal Inlet Diameter (Sagittellt ingångsmått) as shortest distance between posterior part of symphysis pubis and promontorium (S1). As well as Sagittal Outlet Diameter (Sagittellt utgångsmått) as shortest distance between posterior part of symphysis pubis and fist mobile joint between sacrum and coccyx . On axial reconstruction (see topogram for level) measure Interspinal Diameter (Interspinal avstån...
Read more

Huntington Disease

-
Image
10 years old boy from parents being cousins to each other presents with progressive rigidity and dystonia. Initial MR showing significant bilateral atrophy in caudate nuclei and putamina with high signal on FLAIR and T2 consistent with gliosis. Note striking symmetric atrophy of the putamina and caudate nuclei on T2 and IR. Huntington disease (HD) is also known as Huntington chorea. HD is an autosomal dominant chronic hereditary neurodegenerative disorder with complete penetrance [Osborn].  Aggregates of huntingtin protein accumulate in axonal terminals, which eventually leads to the death of medium spiny neurons. Autopsy shows generalized cerebral atrophy with an average of 30% reduction in brain weight. Both the cortex and hemispheric WM are affected. The most characteristic gross abnormality is volume loss with rarefaction of the caudate nucleus, putamen, and globus pallidus [Osborn].  Microscopically, HD features neuronal loss with huntingtin nuclear inclusi...
Read more