Outlines requirements and time allocation 20 Hype Low Signal Intensity(dark on many sequences than something else). Symonymn ntense-same signal as something else MR Terms Signal Intensity (S.L)-related to"proton density"and resonance properties of .shortTl is Bright Proton Density (in between) MRI ANGIOGE (MRA): y of veins 10 MRI ●Advant slight chemical difference Hig g4 Outlines, requirements and time allocation MR Terms :signal intensity ⚫ High Signal Intensity. whiter or lighter than something else. Synonym: Hyperintense ⚫ Low Signal Intensity(dark on many sequences than something else). Synonym: Hypointense. ⚫ Isointense - same signal as something else MR Terms ⚫ Signal Intensity (S.I.) - related to "proton density" and resonance properties of those protons ⚫ T1 Weighted Long T1 is black, short T1 is Bright ⚫ T2 Weighted Long T2 is Bright, short T2 is black ⚫ Proton Density (in between) MRI ANGIOGRAM (MRA): ⚫ Normal brain angiogram, showing high signal intensity of brain arteries, veins and venous sinuses. Noninvasive study - no catheter insertion required. MRI ⚫ Advantages: ⚫ No ionizing radiation (no x-rays) ⚫ Sensitive to slight chemical difference ⚫ Capable of showing fine anatomic structure ⚫ Angiography can be done non-invasively ⚫ Three dimensional study ⚫ Multi planar imaging ⚫ High contrast resolution 20’ 10’