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MRI Image Weighting and Contrast

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Questions and Answers

Which factors affect image contrast in diagnostic imaging?

TR and TE

Intrinsic contrast parameters and extrinsic contrast parameters (correct)

Proton density (PD) and flow

T1 recovery time and T2 decay time

What is the main advantage of MRI compared to other imaging modalities?

Higher spatial resolution

Lower cost

Excellent soft tissue discrimination (correct)

Faster imaging speed

What are examples of extrinsic contrast parameters?

$Turbo$ $factor/echo$ $train$ $length$ and $b$ $value$

$T1$ recovery time and $T2$ decay time

$TR$ and $TE$ (correct)

$Proton$ $density$ ($PD$) and $flow$

What are examples of intrinsic contrast parameters?

Proton density (PD) and flow Signup and view all the answers

What must clinical diagnostic images demonstrate in order to identify anatomy or detect abnormalities within the body?

$Contrast$ between normal anatomical features and between anatomy and pathology Signup and view all the answers

Which parameter affecting image contrast in MRI cannot be changed because it is inherent to the body’s tissues?

Proton density (PD) Signup and view all the answers

What is one of the main advantages of MRI compared to other imaging modalities?

Excellent soft tissue discrimination Signup and view all the answers

What does T1 recovery time refer to in MRI?

Time for longitudinal magnetization to recover 63% of its maximum value Signup and view all the answers

What are examples of extrinsic contrast parameters in MRI?

$TI$, turbo factor/echo train length Signup and view all the answers

What are the factors that affect image contrast in diagnostic imaging usually divided into?

T1 contrast and T2 contrast Signup and view all the answers