Tag Archives: techniques CT and MR
Atypical PRES (PPT)
Here is another presentation that I hope our readers and visitors will find useful and enjoy. We presented this as an “exhibit” at the past meeting of ASNR. The presentation deals with atypical MRI findings in posterior reversible encephalopathy syndrome.… Continue reading >>
By now most Neuroradiologists are aware of the US Food and Drug Administration notification regarding dangerous levels of radiation exposure produced in one facility while performing CT perfusion. This unfortunate event has been front page material for the media, leading to patient anxiety and, more important, to questions regarding the use of this valuable technique. The facility involved has recently revealed that 260 patients were exposed to high radiation levels; 20% of cases involving the eyes which places these individuals at high risk for cataracts. It should come as no surprise that by the time of this writing, legal action … Continue reading >>
Fall is upon us and so is the lecturing season! Like years before, this Fall I will be giving my brachial plexus lecture several times and the most commonly asked question by the audience is: “where can I get your MRI protocol?” For this reason I am posting it here. Posting of protocols seems to gather considerable attention; Dr. Wiggins post on MRI and CT protocols has been viewed over 1900 times! Caveats regarding this post: our BP protocol was designed to satisfy the needs of our clinicians here at UNC, your referring physicians may be expecting … Continue reading >>
The article “Is CT Still Useful in the Study Protocol of Retinoblastoma?“, published July 17 in the Publication Preview section of AJNR, confirms that even when high-field MRI is not available, CT can be avoided in the workup of the patient with suspected retinoblastoma, when MRI is combined with a good ophthalmoscopic exam and ocular sonography. Certainly with 3D imaging at 3T, the detection rate with MRI could reasonably be expected to be even higher, allowing us to “Image Gently” and more accurately.
The authors state that “CT is still the method of choice for detecting intraocular calcium … Continue reading >>
Comment on: L. Saba and G. Mallarini. Window Settings for the Study of Calcified Carotid Plaques with Multidetector CT Angiography. AJNR Am J Neuroradiol first published on March 19, 2009 as doi: 10.3174/ajnr.A1509
In a technical note entitled “Window Settings for the Study of Calcified Carotid Plaques with Multidetector CT Angiography”, Drs. L. Saba and G. Mallarini evaluated how neuroradiologists who are reviewing CT-angiograms of the carotid arteries tend to spontaneously adjust their selection of CT window level and width, in order to accurately quantify the degree of carotid stenosis. They observed that, in the presence of calcified carotid plaques, … Continue reading >>
CTP and MRP acquisition hardware, protocols, post processing, and interpretation vary widely between centers. If we are to use these techniques for rational triage of acute stroke patients to appropriate treatment, validation and standardization is required. I encourage all who perform such imaging to participate in the “STIR” effort, being corrdinated by Max Wintermark et al at UCSF.… Continue reading >>
Alisa Gean is doing a great job getting a group together to share and collaborate neuro protocols. This would be a great place from members to share protocols, and open a discussion about the best imaging techniques.