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Its a bit like comparing apples and Pears! Older instruments are closed some could only take patients upto 140kg and not many were big enough to allow most head restraints used by surgeons. Open imagers were designed to make the experience less clostrophobic and allow larger object to be placed inside.
If you were performing the same tests then the time difference is probably non-existant for a modern open and a modern closed instrument. However, you are probably comparing an old closed instrument with a modern open instrument - the open is quicker. However, if the hospital has been diligent enough to buy a modern instrument perhaps they would like to run more tests whilst you are in the MRI scanner. Each test is run separetly and so running more tests with the instrument in different modes will take longer. Your radiographer will be able to tell you exactly how long the scan will take.
Summary - Open instruments tend to be more modern than closed instruments. Open instruments are more plesant to be scanned in. The number of modes of scan performed it the critical factor in how long the scan takes.
What else can I help you with?
Is the dot open or closed if it is less than?
The dot is open, if it is less than or equal to than the dot is closed
Is the dot closed or open in greater than or equal to?
Closed. Open means it does not equal to...
Is the dot closed or open in less than?
It is open.
Does a letter take longer to reach a jail than a house?
A letter probably does not take longer to reach a jail than a house. A letter will probably take longer to reach an inmate because the officers have to open every letter to check for contraband.
Is rock climbing an open skill or closed skill?
A closed skill is often more complex than an open skill.
How do you know whether to use an open circle or a closed circle when graphing an inequality?
If the inequality is > or< then it is an open circle. If it is greater than or equal to or less than or equal to, it is a closed circle.
Why is it that doors are closed when Air Condition is on?
because air conditioners work throughout a room closed or not closed. if it is open the cool air will get out of the room and the AC will have to cool more air than the air inside the room which will make the AC to work longer and the electricity usage will increase.
Is open end economy better than closed economy?
no
Are the weak candidates are more likely to be nominated in an open primary than a closed primary?
open
Are the weak candidates more likely to be nominated in an open primary than in a closed primary?
open
Acute angle looks like a book that is more blank than blank?
An acute angle looks like a book that is a more closed than open.
When will your dog's eyes open?
they stay closed for no more than a week.
