This is the fourth volume of Ultrasound in Medicine, the Proceedings of the Annual Scientific Meeting of the American Institute of Ultrasound in Medicine. Unless the Executive Board of the Institute change their mind, it may also be the last. Under these circumstances it is somewhat ironical that some of the deficiencies present in previous volumes appear to have been solved in the present volume. Notably, the Programme Committee, for the first time, exercised a stringent selection procedure by means of which the number of papers selected for presentation was limited with the result that both the quality of papers accepted for presentation and publication was improved and the number of simultaneous sessions at the meeting did not exceed two. The contents of this volume have been divided into the same sections as in previous volumes except that no papers on stan­ dardization procedures were accepted and a new supplementary section is added consisting of papers given at the Scientific Meeting of the American Society of Ultrasound Technical Specia­ lists. As in previous editions the readers may consider the engin­ eering sections at the end of this volume are the most rewarding. Some ingenious new systems are described both in the sections on Doppler techniques and new techniques. Current interest in tissue signatures and characterization are reflected in many of the pap~rs appearing in the Tissue Interactions section.

Cardiology.- Cross Sectional Imaging of the Heart by the UI Octoson.- The Echocardiographic Diagnosis of Ruptured Mitral Chordae Tendinae.- Sensitivity and Specificity of Echocardiography in the Diagnosis of Infective Endocarditis.- Echocardiographic Evaluation of the Postoperative Cardiac Patient.- Ultrasonic Detection of Myocardial Infarction by Amplitude Analysis.- Criteria for Quantitative Echocardiography in Children.- The Hypoplastic Left Heart Syndrome-Potential Pitfalls in Echocardiographic Diagnosis.- Echocardiographic Measurement of Left Ventricular Function During Isometric and Isotonic Exercise.- Aortic Valve Motion in Mitral Valve Prolapse Syndrome.- Echocardiogram in Pulsus Paradoxus: Respiration Dependent Cyclic Changes in Mitral and Aortic Valve Motion.- M-Mode Echocardiographic Systolic Motion Patterns of the Aortic Valve: Clinical-Echocardiographic Correlates.- Abnormal Motion of Interventricular Septum and Posterior Wall of Left Ventricle in Experimental "Wolfe-Parkinson-White Syndrome": Echocardiographic and Electrophysiologic Study.- Echocardiographic Response of the Normal Human Left Ventricle to Wide Variations in Preload.- Abnormal Left Ventricular Filling in Patients with Concentric Hypertrophy on Chronic Hemodialysis.- Computer Analysis of Digitized Echocardiograms for the Assessment of Left Ventricular Function in Children.- Echocardiographic Evaluation of Adriamycin Cardiomyopathy in Children.- Calcification and Fibrosis of Mitral Valves: In Vitro Ultrasonic Studies and Clinical Correlations.- The Reliability of Echocardiography in the Diagnosis of Aortic Root Dissection.- Assessment of Distribution of Stroke Volume from the Aortic Root Echocardiogram.- Evaluation of Bicuspid Aortic Valves by Two-Dimensional Echocardiography.- Correlative Study of Pulmonary Valve Echogram and Indirect Pulmonary Artery Pulse.- Ultrasonic Features of Anomalous Origin of the Left Coronary Artery from the Pulmonary Artery.- Tricuspid Atresia: Value of Contrast Echocardiography in 30 Patients.- Two-Dimensional Echocardiographic Findings in Atrial Septal Defect.- Ventricular Septal Excursion and Thickening: A Nonspecific Echocardiographic Measurement.- Echocardiographic Assessment of Septal and Posterior Wall Dynamics and Their Effect on Left Ventricular Filling in Idiopathic Hypertrophie Subaortic Stenosis.- The Echocardiographic Assessment of Sinus Venosus Atrial Septal Defects Late Postoperatively.- Real-Time 80° Sector Echocardiography in Patients with Great Artery Overriding the Ventricular Septum: Tetralogy of Fallot, Truncus Arteriosus, and Pulmonary Atresia with Ventricular Septal Defect.- A Comprehensive Noninvasive Assessment of Anatomy and Function in Patent Ductus Arteriosus.- Abdominal Disease.- Clinical Trials on a New Real-Time Abdominal Scanner.- Abdominal Gray Scale Echography in Children.- Ultrasound Evaluation of the Upper Abdomen with the Real Time Sector Scanner.- Diagnosis of Abdominal and Pelvic Abscesses by Ultrasound and Gallium Scanning.- Gray Scale Ultrasonography of the Biliary Duct System: Comparison with Percutaneous Transhepatic Cholangiography.- Factors Affecting the Recognition of the Dilated Biliary Tree in the Jaundiced Patient.- Demonstration of the Renal Cortex, Medulla and Arcuate Vessels by Grey-Scale Ultrasonography.- Ultrasound in the Pre-Symptomatic Diagnosis of Adult (Dominant) Polycystic Kidney Disease.- Prostatic Ultrasonography: The Prostatic Nodule.- Ultrasonic Imaging of the Scrotum.- High Resolution Real Time Scanning of the Abdomen.- Abdominal Clinical Application of Servo Controlled Sector Scanner with Video Recorder Permitting Manipulation of Image Parameters During Playback.- Image Quality and Practicality of Scanning Large Abdomens with Large-Low Frequency and Smaller-High Frequency Transducers.- Ultrasound in Right Upper Quadrant Pain.- Ultrasonic Detection of Abdominal Abscesses and Verification by Percutaneous Aspiration.- Gallstones: An In Vitro Comparison of the Physical, Radiographic and Ultrasonic Characteristics.- Ultrasonographic Identification of Dilated Intrahepatic Bile Ducts and their Differentiation from Portal Venous Structures.- Diagnostic Ultrasound in the Differentiation Between Obstructive Jaundice and Non-Obstructive Jaundice.- The "Parallel Channel" Sign of Biliary Tree Enlargement in Mild to Moderate Degrees of Obstructive Jaundice.- Anatomic Variations of Portal Venous Anatomy: Ultrasonographic Evaluation.- Non-Pancreatic Disorders Simulating Primary Pancreatic Disease on Ultrasonography.- Ultrasound Visualization of the Pancreatic Duct and its Clinical Application.- Normal Ultrasonographic Appearance of the Ligamentum Teres and Falciform Ligament.- The Dilated Pancreatic Duct: Ultrasonic Evaluation.- Polycystic Kidney Disease: Early Detection by Gray Scale Echography.- The Sonographic Pattern of Infantile Polycystic Kidney.- Ultrasound Diagnosis of Renal Angiomyolipoma.- Assessment of Glomerulonephritis in Children by Ultrasound.- A Comparison of Urinary Tract Lesions Evaluated by Computerized Tomography and Ultrasonography.- Ultrasonography of Normal Adrenal Gland.- Transrectal Radial Cone Scanning for the Staging of Urinary Bladder Tumors.- Serotal Gray Scale Ultrasonography.- Obstetrics and Gynecology.- Computer Analysis fo Fetal Breathing Movements Recorded by Real-Time Ultrasound Imaging.- Ultrasound as an Aid in Intrauterine Transfusion.- Observation of Human Fetal Breathing Movements Using a Real Time B-Scan Method.- Major Fetal Malformations: Reality and Potential of Sonar Prenatal Diagnosis.- Cyclic Variations in Ultrasonographic Evaluation of the Female Pelvis.- Enhanced Ultrasonographic Definition of Pelvic Anatomy by Instillation of Intraperitoneal Fluid.- Sonographic Differential Diagnoses of Pelvic Masses: An Analysis of Pattern Specificity.- Reliability of Sonar Fetal Cephalometry in the Estimation of Gestational Age and in the Diagnosis of Fetal Growth Retardation.- Significance of Biparietal Diameter Differences Between Twins.- Ultrasound as a Diagnostic Aid in Ectopic Pregnancy.- Ultrasonic Changes of Uterine Fibroids in Pregnancy and Degeneration.- Neurology.- Ultrasound Tomography of the Adult Brain.- Ultrasound Tomography of Excised Brains: Normal and Pathological Anatomy.- Detection and Identification of Intracranial Arterial Echoes from the Superior Surface of the Cranium.- Echoencephalographic Changes in Meningitis.- R-Wave to Intracranial Artery Echo Activity Time Interval Measurements Using …