Introducing an ideal resource for students and technologists preparing to sit for the Sonographic Physics Exam: Principles and Instrumentation (SPI), which must be passed successfully before students can sit for the specialty sonography exams by the ARDS (American Registry of Diagnostic Sonography) and ARRT (American Registry of Radiologic Technologists) certification granting bodies. 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. A companion website includes an online exam simulation, customizable for both ARDS and ARRT exam formats.