Order | Comments |
MRI Brain with / without | Cavernoma protocol MRI: MRI Brain w/wo include in comments "T1 thin cuts PRE and POST contrast" |
MRV | There is no MRV order order a MRA Brain and specify VENOGRAM in all caps in the special instructions |
MRA - this is NOT a contrasted study, just a "Time of flight" | • good for evaluating dissections • not good for evaluating aneurysms 4mm or less |
CT Brain Perfusion - this requires iodine contrast - choose areas of interest in non-con scan - inject at standard rate 40 mL IV at 5mL / sec | parameters calculated: cerebral blood volume, cerebral blood flow |
CTV | There is no CTV order order a CTA Brain and specify VENOGRAM in all caps in the special instructions |
CT angiography * rapid injection of iodinated contrast at 3-4 cc/sec (Isovue 300) | |
CT image guidance | • must be thin cut • must include tip of nose. |
Flexion-extension MRI | Okonkwo often gets these Order = MRI cervical spine without contrast specify in instructions: "flexion and extension" Note: they will not do a neutral spine MRI unless you specify they will not do axials unless you specify |
Dual Energy CTH | Order: CT head non-contrast w/ special comments: dual energy CTH generally needed within __ hours after contrast administration |
MRI for ETV assessment | Order an MRI Brain without contrast state in comments: "CISS/FIESTA sequences in all 3 planes + CINE FLOW sequence to evaluate ETV patency" |
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