Notes in 02 Cerebrovascular

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Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Tc-99m HMPAO}} and {{c2::Tc-99m ECD}} are lipohilic perfusion agents that cross the blood bra…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Tc-99m ECD}} is a lipophilic cerebrovascular perfusion agent that must be {{c2::enzymatically…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Tc-99m HMPAO}} is a lipophilic cerebrovascular perfusion agent that must be {{c2::protonated:…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn the evaluation of subacute infarct, the phenomenon of luxury perfusion can cause {{c1::HMPAO::radiotr…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn the evaluation of subacute infarct, {{c1::Tc-99m ECD}} uptake will {{c2::decrease::change}}
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularWhat radiotracer is prefered for cerebrovascular imaging?{{c1::Tc-99m ECD}}
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularWhat types of cerebrovascular images can Tc-99m HMPAO/Tc-99m ECD produce?{{c1::Both tracers are used for…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn brain death, intravenously injected radiotracer is unable to enter the cranial cavity due to {{c1::in…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor brain death, SPECT imaging may be be performed, either with {{c1::HMPAO}} or {{c2::ECD-labelled Tc-9…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn brain death, nuclear cerebrovascular exam demonstrates {{c1::no tracer perfusion}} in the b…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularSign: {{c1::Hot Nose Sign}}
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularNuclear evaluation of {{c1::cerebral perfusion reserve}} can be assessed with an {{c2::acetazo…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularRegions of the brain with reduced cerebral perfusion reserve will have {{c1::relatively reduced::activit…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn a nuclear cerebrovascular exam, seizure foci are {{c1::hypermetabolic::metabolism}} during a seizure …
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIctal perfusion SPECT performed with {{c2::Tc-99m HMPAO}} and {{c2::Tc-99m ECD}} can be injected {{c1::d…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c2::Lewy body dementia::dementia type}} shows decreased SPECT tracer uptake in the {{c1::occipital}} l…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::multi-infarct dementia::dementia type}} shows multiple asymmetric foci of decreased metabolism.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Pick disease(frontotemporal dementia)::dementia type}} is characterized by decreased uptake in the…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularThe radiotracer {{c1::Thallium-201}} generally accumulates in malignant gliomas and not in post-treatmen…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularPost-treatment evaluation of patient with malignant massRadiotracer administered: {{c1::Thallium-201}}Di…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Crossed cerebellar diaschisis}} is a commonly encountered phenomenon in the presence of a supraten…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor nuclear cerebrovascular imaging, Tc-99m ECD demonstrates {{c1::more rapid::compare speed}} blood poo…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor nuclear cerebrovascular imaging, Tc-99m ECD demonstrates a {{c1::better::compare}} shelf life t…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor nuclear cerebrovascular imaging, Tc-99m ECD demonstrates a {{c1::more::compare}} accurate charicteri…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor nuclear cerebrovascular imaging, Tc-99m ECD is only taken up by {{c1::living::general state}} cells.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Technetium-99m}} has a half-life of {{c2::6 hours}} and is used in the majority of nuclear imaging…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Tc-99m DTPA}} and {{c1::pertechnetate}} are {{c2::transient perfusion}} agents. There is no uptake…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularTc-99m DTPA and pertechnetate activity is seen in the {{c1::scalp}}, {{c2::calvarium}}, {{c3::subarachno…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularTransient perfusion agents are reserved for {{c1::planar}} imaging only and are now uncommonly used.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularHMPAO and ECD show activity in the brain parenchyma, mainly {{c1::gray}} matter.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Iodine-123}} has a half-life of {{c2::13 hours}}.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::I-123 ioflupane}} is a {{c2::cocaine}} analog that binds to the {{c1::presynaptic dopamine transpo…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Thallium-201}} has a half-life of {{c2::73 hours}} and is used for SPECT imaging in the differenti…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Thallium}} accumulates in {{c2::viable tumor}} but not normal {{c3::brain tissue}}.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::F-18 FDG}} is the most common FDA-approved PET agent used for brain imaging.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::F-18 florbetapir}}, {{c2::F-18 florbetaben}}, and {{c3::F-18 flutemetamol}} are FDA-approved PET a…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn 2020, {{c1::F-18 flortaucipir}} was approved by FDA for {{c2::tau}} imaging.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularNormally, cerebral blood flow {{c1::increases}} after administration of 1 g Diamox, a carbonic anhydrase…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularSign: {{c1::empty light bulb sign}}: absent intracranial ratiotracer uptake
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Alzheimer disease::dementia}} typically shows asymmetrically to symmetrically reduced {{c2::perfus…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn later stages of Alzheimer disease, the {{c1::frontal}} lobes can also be involved.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularPatient with memory difficulties showing: {{c1::hypometabolism}} predominantly in the {{c2::parietal}} a…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Parkinson disease}} is characterized by decreased {{c2::dopamine transporter::protein}} density in…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularI-123 ioflupane uptake on SPECT and SPECT/CT overlay showing: {{c1::normal symmetric comma-shaped}} acti…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Parkinson's disease::type of dementia}}: I-123 ioflupane uptake on SPECT and SPECT/CT showing:&nbs…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularInterictal PET with {{c1::F-18 FDG::radiotracer}} is very sensitive in localizing {{c2::partial complex:…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Extratemporal}} seizure focus is more difficult to localize. {{c2::Ictal SPECT}} is the most sensi…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularAxial F-18 FDG PET shows near absent glucose metabolism in the left {{c1::cerebral hemisphere::location}…
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Thallium-201}} uptake in the brain requires a {{c2::living}} cell and {{c3::blood brain barrier}} …
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularDual-phase F-18 FDG PET employs early and delayed imaging to evaluate a region of {{c1::suspected tumor …
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Indium-111}} has a half-life of {{c2::67 hours}}.
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::In-111 DTPA}} is ideal for cerebrospinal fluid imaging because it is {{c2::non-lipid soluble::solu…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn CSF imaging, In-111 DTPA is administered by {{c1::lumbar puncture (intrathecally)}}.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn CSF imaging, radiotracer should reach the {{c1::basal cisterns}} by {{c2::1 hour}}.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn CSF imaging, radiotracer should reach the {{c1::sylvian}} and {{c1::anterior interhemispheric cistern…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn CSF imaging, radiotracer should reach the {{c1::cerebral convexities}} by {{c2::12 hours}}.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIn CSF imaging, radiotracer should reach the {{c1::arachnoid villi in the sagittal sinus}} by {{c2::24 h…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularWhat are a few abnormalities of radiotracer activity in  CSF imaging?Presence of radiotracer activi…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularDue to its short half-life (6 hours), {{c1::Tc-99m DTPA}} is used for CSF studies that do not require pr…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularThere is normal {{c1::trident appearance}} of tracer activity in the {{c2::sylvian}} and {{c3::anterior …
Published	05/01/2023	Nuclear and Molecular Imaging: Cerebrovascular{{c1::Radionuclide cisternography}} can be used to confirm suspected {{c2::communicating hydrocephalus}}…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularCommunicating hydrocephalus is characterized by early entry of radioactivity into the {{c1::lateral vent…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularCommon locations for CSF leak are the {{c1::ear}}, {{c2::paranasal sinuses}}, and {{c3::nose}}.
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularCSF leak can be identified by asymmetric activity in the region of the {{c1::ears on frontal}} imaging, …
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularSubtle CSF leaks can only be detected by placing {{c1::cotton pledgets}} in the area of concern, re…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor spinal CSF leak, radioisotope cisternography shows diffusion of the tracer into the {{c1::paraspinal…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularFor evaluation of CSF shunt patency, {{c1::Tc-99m DTPA}} or less commonly In-111 DTPA are injected into …
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularIf the distal limb of the CSF shunt is patent, radiotracer activity should rapidly pass through the shun…
Published	05/01/2023	Nuclear and Molecular Imaging: CerebrovascularManual occlusion of the distal limb (of CSF shunt) should normally show reflux of radiotracer into the {…
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