FRCR MCQ ----NEURO MODULE

1.From above MRI image ,answer following questions

A.Name MRI the sequence of a,b,c,d,e

B.What is the location of lesion?

C.What is finding in a,b.c,d.e?

D. What is diagnosis and why ?

ANS---

A.—

a.---T1W image

 b.—T2W image

 c.-- gradient recalled echo image

 d.-- the diffusion-weighted image

 e.--- the calculated ADC map

B.The location of lesion is left basal ganglia

C.----

a.---hypointense to isointense to brain on T-weighted images

b.---hyperintense to brain on T2-weighted images with a peripheral rim of marked hypointensity

c.---GRE shows hypointensity of lesion

d.---the lesion is hyperintense on diffusion weighted image

d.---reduced ADC map

Hematomas containing intracellular oxyhemoglobin (OxyHb_Intra), intracellular deoxyhemoglobin (DeoxyHb_Intra), and intracellular methemoglobin (MetHb_Intra) all have restricted diffusion (reduced ADC), whereas hematomas with extracellular (“free”) methemoglobin (MetHb_Free) have elevated ADC

D.

Hyperacute hematoma of left basal ganglia

Hyperacute hematomas appear slightly hypointense or isointense to brain on T-weighted images and slightly hyperintense to brain on T2-weighted images. A thin, irregular rim of marked hypointensity at the periphery of the lesion on T2-weighted images  is paramount to recognize it. This has been attributed to very rapid deoxygenation of blood within the hematoma at the blood–tissue interface. The hypointensity may be more evident in 3-T than lower-field systems and more obvious on GRE images regardless of field strength; regardless of scanner field strength.So, T2*-weighted GRE should be part of all routine stroke MR protocols.

Restricted diffusion and reduced ADC map is due to presence of oxyhemoglobin