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MRI contrast

QuestionAnswer
How does Gadolinium function as a contrast agent? A. It is a direct image component, resonating at the same frequency as water B. It shortens the T1 time of tissue C. It lengthens the T2 time of tissues It shortens the T1 time of tissue
The most common positive contrast agent used in clinical MR imaging is: A. Barium B. Blueberry juice C. Gadolinium D. Ionic contrast Gadolinium
The substances that bind to gadolinium ions are defined as: A. Chelates B. Relaxivities C. Pathogens D. Echo trains Chelates
Gadolinium chelates used in MR imaging are: A. Paramagnetic B. Diamagnetic C. Super Paramagnetic Iron Oxide D. Ferromagnetic Paramagnetic
All of the following are true regarding gadolinium EXCEPT: A. Gadolinium chelates do not pass normal blood-brain barrier C. Gadolinium has six unpaired electrons D. Gadolinium chelates do pass a disrupted blood-brain barrier Gadolinium has six unpaired electrons Gadolinium has 7 unpaired electrons
The FDA approved oral contrast agent for MRI makes bowel appear: A. T1 & T2 hyperintense B. T1 & T2 hypointense C. T1 hyperintense/ T2 hypointense D. T1 hypointense/ T2 hyperintense T1 & T2 hypointense
Contraindications for IV gadolinium contrast use are: 2: Contraindications for IV gadolinium contrast use are: A. Pregnant or nursing mothers B. Sickle cell anemia C. Insulin dependent diabetes D. All of the above E. None of the above None of the above There are no known contraindications to IV gadolinium contrast usage.
What is the percentage of patients reported to have allergic reactions to gadolinium contrast agents? A. Less than 1% B. 10% C. 25% D. 50% Less than 1%
IV Gadolinium contrast administration is indicated for: A. MRCP B. MRA of the renal arteries C. Central nervous system D. A & C only Central nervous system
____________ is used as an anti-peristalsis agent in MR Enterography procedures. A. Glucagon B. Barium C. Gadolinium D. Immodium Glucagon
Metastatic lesions enhance after injecting a gadolinium chelate because of: A. The breakdown in the blood brain barrier B. T2 shortening C. The tangling of arteries and veins in metastatic disease D. None of the above The breakdown in the blood brain barrier
Gadolinium is an example of a ___________ contrast agent. A. Paramagnetic B. Diamagnetic C. Ferromagnetic D. Quasimagnetic Paramagnetic
In MRI, the function of gadolinium is to: A. Shorten the T1 and T2 times of tissues B. Lengthen the T1 and T2 times of tissues C. Lenghten the T2 time of tissue only D. Null both the T1 and T2 times of tissues Shorten the T1 and T2 times of tissues
The standard dose for the adminstration of IV gadolinium chelates is: A. 1 mmol/kg B. 0.1 mmol/kg C. 0.2 mmol/kg D. 0.1 mmol/lb 0.1 mmol/kg
Gadolinium IV contrast: A. Lengthens the T1 and T2 times of tissues B. Shortens the T1 and T2 times of tissues C. Does not affect the T1 and/or T2 times of tissues D. Only shortens the T2 times of tissues Shortens the T1 and T2 times of tissues
Following the administration of IV gadolinium contrast, it is recommended to: A. Follow the injection with a flush of 0.5 mL saline B. Follow the injection with a flush of 5 mL saline C. Follow the injection with a flush of 100 mL saline Follow the injection with a flush of 5 mL saline
Following the injection of contrast, which of the following patients are most likely to have a potentially serious reaction? A. Anemic patients C. Hypertensive patients D. Those with asthma or allergic respiratory disorders Those with asthma or allergic respiratory disorders
VoLumen is a contrast agent used for: A. Vessel lumen relaxivity B. Volume rendering MRCP C. Blood brain barrier D. Bowel enhancement Bowel enhancement
VoLumen would be selected for which MR procedure? A. MRCP B. MR perfusion C. MR enterography D. MRA abdomen E. MRA intracranial circulation MR enterography
Calculate the dose of contrast (0.1mmol/kg) that should be administered to a patient weighing 176 lbs with normal kidney function in a routine MR examination. A. 7mL B. 9mL C. 13mL D. 16mL E. 18mL 16mL Divide 176 lbs by 2.2 (lbs per kg), then multiply the kg (80) by 0.2 ml/kg = 16mL
Created by: zach1710
 

 



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