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