Prepare for—and excel on—the Sonography Principles and Instrumentation (SPI) certification examination offered by the ARDMS! Traci B. Fox and Steven M. Penny’s Examination Review for Ultrasound: Sonographic Principles & Instrumentation, 3rd Edition, focuses only on the content you’ll encounter on the exam, saving you valuable study time. Now in full color throughout, it uses a concise, narrative approach, aligns with the SPI revised content outline and format, and features an online exam simulator with hundreds of registry-style questions.