MRI quiz 3 image contrast and weighting

A spin echo image with a long TR and a long TE is known as what type of image? A) T2 weighted image B) T1 weighted image C) Proton density weighted image D) Spin density weighted image

a

Fat has a ____ T1 relaxation time and appears _____ on a T1 weighted image when compared to water. A) Long, Bright B) Short, Bright C) Long, Dark D) Short, Dark

b

MR images that are the result of differences in the longitudinal relaxation characteristics of tissues are known as ___. A) T2 weighted images B) T1 weighted images C) Proton density weighted images D) Functional images

b

The imaging parameter which primarily controls T2 weighting is _____. A) None of the above B) Echo time C) Repetition time D) Inversion time

b

Another name for a proton density weighted image is _____ . A) Inversion recovery B) T2 weighted C) Spin density D) Both A and B

c

In a proton density weighted image, tissues with a low number of hydrogen nuclei appear ____. A) Isointense B) Hyperintense C) Hypointense D) None of the above

c

In a T1 weighted image, a short TE is used to ____ . A) Maximize T1 effects B) Maximize T2 effects C) Minimize T1 effects D) Minimize T2 effects

d

In a T2 weighted image, a long TR is used to ____. A) Minimize T1 effects B) Minimize T2 effects C) Maximize T1 effects D) Maximize T2 effects

d

In a T2 weighted image, tissues with a long T2 relaxation times appear ____ compared to tissues with short T2 relaxation times. A) Hypointense B) None of the above C) Isointense D) Hyperintense

d

MR images that are based on the differences in the amount of hydrogen nuclei in tissues are known as _____ . A) T1 weighted images B) Functional images C) T2 weighted images D) Proton density weighted images

d