Brain weighs about 2.7 pounds for females and 3 pounds for males. Brain consists of forebrain, midbrain, and hindbrain structures. Proper positioning is crucial for optimal MRI image quality
Benign epithelial lined cysts containing mucin, blood, cholesterol. Accounts for 2-3% of primary brain tumors and 15-20% of intraventricular masses. Located at foramen of Monro in 99% of cases. Most common in early middle age (30-40 years)
Rotator interval is triangular space created by coracoid process between supraspinatus and subscapularis muscles. Contains coracohumeral ligament, superior glenohumeral ligament, and long head biceps tendon. Divided into medial (2 layers) and lateral (4 layers) parts at humeral head cartilage/bone transition
Cysts of lower male genitourinary tract are uncommon and usually benign. Associated with various symptoms including urinary tract infection and infertility. Two main groups: intraprostatic and extraprostatic cysts
Soft-tissue infections can be diagnosed clinically but imaging helps confirm diagnosis. Imaging provides detailed anatomic information with high spatial resolution. Infections can spread from superficial to deep layers, including fascia
Corpus callosum is major white-matter tract crossing interhemispheric fissure. Contains arteriole-venule pairs and perivascular fibrous alae. Short arterioles supply central zone, similar to cerebral cortex. Long arterioles supply extreme lateral corpus callosum and basal ganglia