Sep 8, 2023
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Catching the Flow
Your memories, perception and thoughts all exist in your neocortex, grooved tissue that comprises over three-quarters of your brain. Its only blood supply comes from the pial arterial vasculature, a network of tiny blood vessels that are difficult to image in detail. Although blood vessels have been successfully imaged at high resolution using live, time-of-flight magnetic resonance angiography (TOF-MRA) – an approach that detects the flow of water protons in blood – it was ruled out for pial arteries due to their slow blood flow; until now. Researchers successfully imaged the pial arteries of four adults with TOF-MRA by using extremely small voxels – voxels are the 3D equivalent of pixels and refer to cubes of space. The resulting high-resolution images (pictured) captured pial arteries down to one voxel in diameter. TOF-MRA, therefore, wasn't limited by slow blood flow but by image resolution and can now be used in pial vasculature studies.
Written by Lux Fatimathas
Video by Saskia Bollmann and colleagues
Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Charlestown, MA, USA
Video originally published with a Creative Commons Attribution 4.0 International (CC BY 4.0)
Published in eLife, April 2022
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Esta un tanto extraña pero hermosa imagen se trata de una angiografÃa cerebral o arteriografÃa cerebral, que es un estudio radiológico de las arterias y venas del cerebro.
Para realizarlo se efectúa una punción en una arteria de la ingle (bajo anestesia local) para introducir un catéter (pequeño tubo), que se avanza en el interior de los vasos sanguÃneos hasta el cuello, para luego inyectar el lÃquido de contraste que hace posible poder ver de los vasos sanguÃneos utilizando una máquina especial de rayos x, denominada angiógrafo.
Se utiliza principalmente para identificar:
Malformaciones vasculares, vasos sanguÃneos anormales en el cerebro.
Aneurisma,vaso sanguÃneo abultado.
Estrechamiento de las arterias en el cerebro.
Vasculitis, inflamación de los vasos sanguÃneos en el cerebro.
Evaluar el flujo sanguÃneo
Encontrar un coágulo que pueda causar un accidente cerebrovascular.
https://www.msdmanuals.com/es-mx/hogar/multimedia/video/v717329_es
www.radiologyinfo.org/es/info/angiocerebral%3fgoogle=amp
Diagnostic Imaging Services has joined the Capitol Imaging Services affiliate network. Learn more.
https://www.disnola.com/dis-joins-cis
Left coronary angiogram viewed from right anterior oblique direction
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MCA bifurcation #brain #aneurysm clipping.This was a small, blister-like aneurysm that had grown over several years of observation. Simple technical nuances in this case include clipping parallel to M2 and perpendicular to M1, avoiding #stenosis of the M2 origins, securing both segments within the clip, ensuring patency of small #perforator branches below the clip (best seen in ICG #angiography after clip placement), and avoiding retractors. Final overview images of the brain demonstrate how #delicate and minimally invasive #microsurgical clipping can be under high #magnification. Despite dramatic advances in #endovascular #techniques, there still remain aneurysms that are easier and safer to treat with clipping. . #Repost with @Repostlyapp @babaksjahromi *Edited* time-lapse video #neurosurgery #neurocirurgiabr #neurosurgeryblog #neurocirurgia https://www.instagram.com/p/BsEvH_gFAPQ/?utm_source=ig_tumblr_share&igshid=ygvzjkiiispu
Cold Snap
Doctors often compare notes, sharing their experiences and 'best practice' on how to treat diseases. When cases are rare, or spread over the globe, published medical reviews help to bring international findings together, looking for patterns in the pooled information that might lead to better treatments. A recent review on frostbite suggests injection with tissue plasminogen activator, a protein involving in reducing blood clots, has saved many digits from amputation, including the top two fingers of this 54-year old man. Clotting is one by-product of the body’s response to ice crystals formed inside blood vessels (seen here in black) – so it’s no surprise that heparin, a drug that helps 'thin' the blood, also helped in his treatment. Combination treatments like these may help doctors prepare for the ongoing rise in cold injury cases.
Written by John Ankers
Image from work by John Lee and Mikhail C. S. S. Higgins
Department of Radiology, Boston Medical Center, Boston, MA, USA
Image copyright held by the American Journal of Roentgenology
Research published in the American Journal of Roentgenology, April 2020
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