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Emergency Radiology, An Issue of Radiologic Clinics of North America - E-Book

Emergency Radiology, An Issue of Radiologic Clinics of North America - E-Book

Jorge A Soto

(2012)

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Book Details

Abstract

The practice of Emergency Radiology has undergone rapid change in the last decade: as imaging procedures are increasingly performed within short periods of time after the arrival of patients to the emergency room, the expectation for near real-time interpretations (often by subspecialists) has gained popularity. Larger emergency centers provide 24 hour on-site coverage by well trained radiologists, while others rely on the services of equally well trained radiologists located off-site, taking advantage of modern universal interconnectivity. Either way, radiologists’ input is increasingly affecting the immediate outcome of patients presenting with acute symptoms.  Radiologists have embraced the challenge to protect patient safety by seeking evidence-based data to support the proper utilization of CT (including the use of alternative imaging modalities) and radiologists and CT manufacturers together have worked intensely to find optimal methods to deliver the inevitable radiation.

Table of Contents

Section Title Page Action Price
Front Cover Cover
Emergency Radiology i
Copyright Page ii
Table of Contents v
Contributors iii
Preface: Emergency Radiology xi
Chapter 1. Strategies for Reducing Radiation Exposure in Multi-Detector Row CT 1
REDUCING RADIATION EXPOSURE: BEFORE THE SCAN 2
UNDERSTANDING THE X-RAY TUBE OUTPUT METRICS, VOLUME CT DOSE INDEX AND DOSE-LENGTH PRODUCT 2
REDUCING RADIATION EXPOSURE: DURING THE SCAN 3
REDUCING RADIATION EXPOSURE: AFTER THE SCAN 11
AFTER THE SCAN: CAPTURING AND MONITORING RADIATION DOSES 11
SUMMARY 11
REFERENCES 12
Chapter 2. Updated Imaging of Traumatic Brain Injury 15
EPIDEMIOLOGY 15
IMAGING MODALITIES 16
SUMMARY 39
REFERENCES 39
Chapter 3. The Imaging of Maxillofacial Trauma and its Pertinence to Surgical Intervention 43
TECHNOLOGY 43
NASAL FRACTURES 45
NASO-ORBITAL-ETHMOID FRACTURES 45
FRONTAL SINUS FRACTURES 46
ORBITAL FRACTURES 48
ZYGOMA 50
MAXILLARY FRACTURES 52
MANDIBULAR FRACTURES 54
SUMMARY 56
REFERENCES 56
Chapter 4. Multi-Detector Row CT Angiography of the Neck in Blunt Trauma 59
PATIENT SCREENING AND RISK FACTORS FOR BCVI 59
SUMMARY 71
ACKNOWLEDGMENTS 71
REFERENCES 71
Chapter 5. Imaging of Acute Head and Neck Infections 73
SOURCES OF INFECTION AND IMAGING OPTIONS 73
ANATOMY 74
SUMMARY 82
REFERENCES 82
Chapter 6. Imaging of Aortic and Branch Vessel Trauma 85
NORMAL AORTIC ANATOMY 85
EPIDEMIOLOGY, OUTCOME, AND PATHOPHYSIOLOGY 85
CLASSIFICATION OF AORTIC INJURY 87
ASSOCIATED INJURIES 87
IMAGING TECHNIQUES 88
IMAGING APPEARANCES OF AORTIC INJURY 90
PITFALLS IN THE INTERPRETATION OF AORTIC INJURY ON MDCT 98
SUMMARY 100
REFERENCES 100
Chapter 7. Splenic Trauma: What is New? 105
ANATOMY AND TRAUMATOLOGY 105
MANAGEMENT OF SPLENIC INJURY 105
TRIAGE OF ABDOMINAL TRAUMA 106
ULTRASOUND IN SPLENIC TRAUMA 106
CT OF SPLENIC TRAUMA 107
REPORTING AND GRADING SPLENIC INJURY 115
SPLENIC ARTERIOGRAPHY AND EMBOLIZATION 116
IMAGING FOLLOW-UP AFTER SPLENIC INJURY 117
SUMMARY 119
REFERENCES 119
Chapter 8. CT Imaging of Blunt Traumatic Bowel and Mesenteric Injuries 123
GENERAL CONCEPTS AND PATHOPHYSIOLOGY 123
CT TECHNIQUE 124
SMALL BOWEL INJURIES 124
DUODENAL INJURIES 128
COLONIC INJURIES 128
ANORECTAL INJURY 129
INJURIES TO THE MESENTERY AND MESENTERIC VESSELS 131
FREE INTRAPERITONEAL FLUID 131
SUMMARY 134
REFERENCES 134
Chapter 9. Multi-Detector Row CT of Acute Non-traumatic Abdominal Pain: Contrast and Protocol Considerations 137
ORAL CONTRAST 137
INTRAVENOUS CONTRAST 143
IMAGE RECONSTRUCTION AND POST-PROCESSING 144
RADIATION DOSE 144
SUMMARY 145
REFERENCES 146
Chapter 10. Imaging of Abdominal Pain in Pregnancy 149
GENERAL CONSIDERATIONS 150
APPENDICITIS IN PREGNANCY 151
UROLITHIASIS 157
SUSPECTED BILIARY TRACT DISEASE 164
IMAGING OF ABDOMINAL AND PELVIC TRAUMA IN PREGNANCY 166
PATIENT COUNSELING 168
SUMMAR 168
REFERENCES 169
Chapter 11. Diagnosis of Acute Gastrointestinal Hemorrhage and Acute Mesenteric Ischemia in the Era of Multi-Detector Row CT 173
ACUTE GASTROINTESTINAL HEMORRHAGE 173
ACUTE MESENTERIC ISCHEMIA 177
SUMMARY 181
REFERENCES 181
Index 183