Ask a Question

fMRI is mostly dependent on which parameter?

← Prev Question Next Question →
+1 vote
120 views
in Clinical Science by (102k points)
fMRI is mostly dependent on which parameter?

(a) T1 time

(b) T2 time

(c) T2* time

(d) T1 + T2 time

The question was asked in a job interview.

This intriguing question comes from FMRI topic in portion Diagnostic Investigation via Imaging Techniques of Clinical Science

1 Answer

+1 vote
by (332k points)
selected by
 
Best answer
The correct answer is (c) T2* time

Explanation: When the gradient and RF coils are powered off, the magnetized elements get demagnetized and this causes the image to be formed. T1 is the time for the elements to go back to the original, demagnetized state. T2 is the time needed for the elements to go out of phase. T2* is the time needed for the spin to dephase. T2* is important for fMRI because oxygenated hemoglobin is diamagnetic while deoxygenated hemoglobin is paramagnetic. Thus, the T2* star time will be different for the two of them and the amount of oxygen used by the brain can be mapped.

Related questions

Welcome to TalkJarvis QnA, a question-answer community website for the people by the people. On TalkJarvis QnA you can ask your doubts, curiosity, questions and whatever going in your mind either related to studies or others. Experts and people from different fields will answer.

Most popular tags

biology – class 12 biology – class 11 construction & building materials chemistry – class 12 electronic devices & circuits network theory data structures & algorithms ii cell biology ic engine insurance finance money computational fluid dynamics engineering physics i discrete mathematics chemistry – class 11 aerodynamics casting-forming-welding i engineering mathematics operating system casting-forming-welding ii engineering drawing mysql engineering geology digital circuits wireless mobile energy management electrical measurements digital communications cyber security analytical instrumentation embedded systems electric drives cytogenetics computer fundamentals life sciences basic civil engineering advanced machining iot design of electrical machines physics – class 12 applied chemistry dairy engineering basic chemical engineering cloud computing microprocessor bioinformatics aircraft design aircraft maintenance software engineering drug biotechnology digital signal processing biochemistry data structures & algorithms i automotive engine design avionics engineering material & metallurgy energy engineering cognitive radio unix electrical machines biomedical instrumentation object oriented programming electromagnetic theory power electronics analog communications bioprocess engineering civil engineering drawing engineering metrology physics – class 11 mathematics – class 12 engineering chemistry i basic electrical engineering unit processes mongodb signals and systems cryptograph & network security hadoop mathematics – class 11 engineering physics ii html control systems engineering mechanics antennas analog circuits computer network java sql server javascript concrete technology chemical process calculation artificial intelligence design of steel structures c++ database management computer architecture engineering chemistry ii corrosion engineering chemical technology dc machines
Powered by TalkJarvis
...