*CENTRAL NERVOUS IMAGING INTERPRETATION* RADIONUCLIDE ANGIOGRAPHY 1.UNILATERAL DECREASED FLOW -CEREBROVASCULAR DISEASE, INCLUDING STROKE -SUBDURAL FLUID COLLECTION OTHER THAN BLOOD-EMPYEMA, EFFUSION, HYGROMA. -SUBDURAL HEMATOMA-ACUTE OR CHRONIC. 2.BILATERALLY DECREASED FLOW -BILATERAL CEREBROVASCULAR DISEASE -BILATERAL FLUID COLLECTIONS OTHER THAN BLOOD-EFFUSIONS, HYGROMAS, EMPYEMAS. -BILATERAL SUBDURAL HEMATOMAS -CONGESTIVE HEART FAILURE -FAULTY INJECTION -SUPERFICIAL CORTICAL ATROPHY 3.UNILATERAL INCREASED FLOWBR> -ARTERIOVENOUS MALFORMATION. -INTRACRANIAL ABSCESS -INTRACRANIAL TUMOR (ESPECIALLY GLIOBLASTOMA, MENINGIOMAS, AND SOME METASTATIC LESSONS) -LUXURY PERFUSION FOLLOWING A CEREBROVASCULAR ACCIDENT. -MENINGITIS -MENINGOENCEPHALITIS -POSTSURGICAL 4.BILATERALLY INCREASED FLOW -MENINGITIS -MENINGOENCEPHALITIS 5."HOT NOSE" -CEREBROVASCULAR DISEASE 6.JUGULAR REFLUX -LEFT ANTECUBITAL INJECTION. -MEDIASTINAL TUMOR -NORMAL VARIANT-SECONDARY TO INCOMPETENT OR ABSENT VENOUS VALVES. -VALSALVA MANEUVER. 7.FOCAL AREA OF INCREASED ACTIVITY IN THE NECK -CONTRALATERAL ARTERIAL STENOSIS -JUGULAR REFLUX. 8.VASCULAR BLUSH ON DYNAMIC IMAGING FOLLOWED BY INTENSE UPTAKE ON STATIC IMAGING -MENINGIOMA -VASCULAR METASTASIS (ESPECIALLY RENAL, THYROID) STATIC IMAGING 1.SOLITARY FOCUS OF UPTAKE -ABSCESS -CEREBROVASCULAR ACCIDENT-ISCHEMIC OR HEMORRHAGIC. -EAR ARTIFACT -MENINGITIS -NEOPLASM-PRIMARY OR METASTATIC -PERINATAL ASPHYXIA -POSTCRANIOTOMY -SCALP CONTUSION -SINUSITIS. -SUBDURAL FLUID COLLECTION OTHER THAN BLOOD -EMPYEMA, EFFUSION, HYGROMA, ETC. -SUBDURAL HEMATOMA-ACUTE OR CHRONIC -TEMPORAL MUSCLE UPTAKE. 2.MULTIPLE FOCI OF UPTAKE -BILATERAL FLUID COLLECTIONS OTHER THAN BLOOD -EMPYEMA, EFFUSION, HYGROMA, ETC. -BILATERAL SUBDURAL HEMATOMAS. -CEREBRITIS. -LATERAL VENTRICLE VISUALIZATION (CHOROID PLEXUS) -MENINGITIS -MULTIFOCAL ABSCESSES. -MULTIPLE METASTASES. -MULTIPLE OSSEOUS METASTASES TO THE SKULL -PERINATAL ASPHYXIA -SINUSITIS. 3.SUPRASELLAR UPTAKE -CRANIOPHARYNGIOMA -MENINGIOMA -PITUITARY ADENOMA 4.ANTERIOR MIDLINE LESIONS -GLIOBLASTOMA 5.DOUGHNUT SIGN -ABSCESS -NEOPLASM-PRIMARY (ESPECIALLY GLIOBLASTOMA) AND METASTATIC 6.INCREASED PERIPHERAL UPTAKE (RIM SIGN) -CEPHALOHEMATOMA -MOTION ARTIFACT -POSTSURGICAL -SCALP CONTUSION, LACERATION OR HEMATOMA -SCALP VEIN INJECTION -SUBDURAL FLUID COLLECTION OTHER THAN BLOOD-EFFUSION, EMPYEMA, HYGROMA -SUBDURAL HEMATOMA -SUBGALEAL HEMATOMA 7.DECREASED UPTAKE -BRAIN DEATH -METALLIC PLATE IN SKULL -SURGICAL DEFECT IN SKULL 8.CHOROID PLEXUS VISUALIZATION -LACK OF PERVIOUS PERCHLORATE ADMINISTRATION. 9.FALSELY NORMAL -DEEPLY LOCATED LESION. -LACK OF SUFFICIENT ABNORMAL VASCULAR PERMEABILITY (E.G., LOW GRADE GLIOMA) -LESION SIZE SMALLER THAN RESOLVING POWER OF SYSTEM. 10.CNS UPTAKE OF BONE AGENT -CEREBRAL INFARCTION -MENINGIOMAS (ESPECIALLY SPHENOID WING AND CONVEXITY) * BRAIN-USEFUL TIPS * *BRAIN CLINICAL APPLICATIONS* * CISTERNOGRAGHY-USEFUL TIPS * *CISTERNOGRAGHY IMAGING INTERPRETATION* * CENTRAL NERVOUS SYSTEM * |