Introducing an ideal resource for students and sonographers preparing to sit for the Sonography Principles and Instrumentation (SPI) examination offered by the ARDMS (American Registry for Diagnostic Medical Sonography) sonography credential granting organization. A narrative style exam review, this resource is ideal for ultrasound programs requiring a certification review manual for either a review course or for use throughout the curriculum, as well as for any professional preparing for certification. With content based on current exam formats, this book will help students identify strengths, assess and overcome weaknesses, and ace the test. The companion website includes an online exam simulation, with hundreds of additional questions, based on the content outline of the Sonography Principles and Instrumentation offered by the ARDMS.