You can download BSAVA Manual of Canine and Feline Ultrasonography by Frances J. Barr and Lorrie Gaschen free in pdf format.
In the latest addition to the BSAVA imaging Manuals series, this book provides an overview of the physical principles of ultrasonography and discusses the equipment required as well as the general principles of the ultrasound examination. It then moves on to discuss body systems in individual chapters, with each chapter following a similar format:
- Comparison of ultrasonography with radiography and CT
- Imaging technique
- Normal ultrasonographic appearance
- Interpretation of disease.