Alex @MRartifacts

On the upper image you can see a large pituitary mass that appeared to be cystic on the enhanced portion of the exam. The lower image was obtained seven months later. The arrow points to T1 shortening in the pituitary stalk that is evident on this fat su… ift.tt/38ZtkOD

Diagnosis ? ift.tt/2Ss2g5z

You will notice that the cortical veins and transverse sinus appear high signal intensity on the sagittal scan. Could this all be entry slice effect? ift.tt/2EmHcWj

Remember cavernomas may appear in the drainage bed of a developmental venous anomaly as seen in this case. In fact this association is so powerful that when you see one you should really look for the other. This is particularly true in cases that may go … ift.tt/2LMBxwT

The tortuous course of the nerve roots below the level of stenosis emphasize that this patient’s stenosis got worse At some point between this study and the prior exam on your right at which time the roots had a normal draping pattern. ift.tt/2YenQvA

What is the name of this artifact commonly seen on DWI but particularly striking here? ift.tt/2LhQl6i

The linear high signal intensity in the midbrain indicated by the small arrow most likely reflects retained gadolinium in this patient who has had nearly yearly MRI scans for a tumor. ift.tt/2DdnFHr

The lower image was obtained a week after the upper image. Notice how the infarct indicated by arrows is less evident than on the earlier CT scan. This phenomenon is called “fogging” and while the physiology is not certain it can occur about 10 days afte… ift.tt/33HXx2O

Notice how the basal ganglia indicated by the arrow appear high signal intensity on the T2 weighted image but not so much on the FLAIR image. This appearance Is due to the signal drop out of CSF and indicates the patient has dilated basal ganglia perivas… ift.tt/2ClI1Od

Maxillary sinus mucocele? Would you ask for more imaging? ift.tt/329kz18

Fall brings it’s own unique beauty. ift.tt/2qMMlnf

Excellent example of cord injury associated with a single level disc herniation. T2 prolongation could be a reflection of edema or myelomalacia. ift.tt/33yFvzw

There appears to be a filling defect in the basilar artery on this patient’s Angiogram. Thrombus? ift.tt/35g54Y2

In this patient who presented to the emergency room with worst headache of life there is early and asymmetric enhancement of the right cavernous sinus indicated by the arrows.The patient has no history, signs, or symptoms of a dural fistula.But does this… ift.tt/2Mf0foS

This patient has photophobia and headaches. On this FLAIR scan The cortical sulci are not visible. Is this abnormal? Or can you account for it based on other findings on the image? ift.tt/2lFpTdn

Nice example of CT negative (lower image) for subarachnoid hemorrhage that is well demonstrated on same day FLAIR sequence on MR.Either from delayed presentation or low hematocrit blood products in the subarachnoid space can be difficult to identify on … ift.tt/32EaERV

The lower image at the level of the foramen magnum demonstrated an enhancing nodule next to the spinal cord. Will this patient require long-term follow-up of this finding, since differential might include neoplasm. ift.tt/2NORwMB

Normal appearance of the transverse ligament on CT inserting on the tubercle on C1 anterior arch. ift.tt/2MGMAd6

Can you explain the band of low attenuation in the upper portion of the brain on this image? ift.tt/2NBHNJG

This is a dramatic example of a dark ghost arising from the pulsating flow in the transverse sinus.Can you predict the phase encoding direction? ift.tt/2MHTOxg