Seth Wallack, DVM, DACVR VICSD Founder & CEO
Board-Certified Veterinary Radiologist

Dr. Seth Wallack is an on-staff board-certified veterinary radiologist, founder and CEO of VICSD. His work in radioiodine (I-131) therapy for treating feline hyperthyroidism resulted in a new protocol for treatment dosing, and he lectures on this topic regularly at seminars and meetings around the country. He also started the American Association of Veterinary Radiologists (AAVR), an online veterinary radiology education resource for veterinarians and veterinary technicians, and is the founder and president of, an online veterinary teleconsulting and image storage platform. Dr. Wallack currently has a patent pending on real-time ultrasound, a service where a licensed sonographer travels to the general practitioner’s hospital to perform the ultrasound and broadcasts the study over the internet to a board-certified specialist who reviews them in real-time. He has published numerous professional journal articles and book chapters and is the author of The Handbook of Veterinary Contrast Radiography.

Seth Wallack
William A. Ladd, MD, Consulting Radiologist

 Dr. William Ladd specializes in human diagnostic radiology, neuroradiology, and nuclear medicine. He received his training at the Massachusetts General Hospital and holds a master’s degree in nuclear physics from MIT. He has over 25 years of experience in radiology practice and is currently a Health Sciences Clinical Professor of Radiology at the University of California, San Diego, School of Medicine. Previously, Dr. Ladd was a Clinical Assistant Professor of Radiology at the University of Texas, Health Science Center, San Antonio and at the UCSD School of Medicine, as well as the Section Chief for chest and mammography while at the Wilford Hall US Air Force Medical Center in San Antonio. Dr. Ladd has received the San Diego County Medical Society Top Doctor Award in both 2005 and 2007. He is a Diplomate of the American Board of Radiology as well as a Fellow of the American College of Radiology.

William A. Ladd
Christina Hewes, DVM, MS, DACVS-LA, DACVECC  

Dr. Christina Hewes grew up in the San Francisco Bay Area and received her veterinary degree from UC Davis. After veterinary school, she completed an equine surgery residency in northern Virginia at Marion duPont Scott Equine Medical Center and an equine emergency and critical care fellowship at Auburn University in Alabama. After 10 years of equine practice and exposure to small animal critical care at Auburn University, Dr. Hewes completed a small animal fellowship in critical care and emergency and started practicing as a small animal critical care specialist and emergency surgeon.

In her free time Christina enjoys riding horses, hiking, baking, and spending time her cat.

Christina Hewes
Kreig Embriano, VMD, MS, DACVR

Dr. Kreig Embriano hails from New England and received his Bachelor of Science at the University of Connecticut, followed by his veterinary degree from the University of Pennsylvania. His post-veterinary training includes a rotating small animal internship, a diagnostic imaging internship at VICSD, mentored by Dr. Wallack, a part-time diagnostic imaging externship, and two years of small animal emergency medicine and surgery. He graduated with a Master of Science and completed a radiology residency at Auburn University in 2022. Dr. Embriano achieved diplomate status from the American College of Veterinary Radiology in the same year.
Dr. Embriano and his wife share their busy life with three cats. They enjoy traveling, soccer, biking, podcasts, craft beer, and gastronomy.
Amy Buck, DVM, Registered Veterinary Medicine Sonographer

Following graduation from UC Davis in 2017, Dr. Buck completed a one-year surgical internship at Haygard’s Equine Medical Center before returning to San Diego to complete a one-year small animal rotating internship at Veterinary Specialty Hospital in San Marcos.
Dr. Buck is a practicing emergency and urgent care veterinarian. She has always had a passion for imaging and is happy to expand her skills as a veterinary sonographer at VICSD. In her spare time, Dr. Buck enjoys playing beach volleyball, reading, playing board games with her family, and spending quality time with her dog, Truman.

Karen Brewer, Vetology Angel Director of Client Services

Karen came to the VICSD team in 2010 and has more than 10 years work experience in Client Services. She is the Director of Client Services for Vetology, and is very grateful to work with such an amazing team. She is the mother of 2, and enjoys going to the beach and out on the boat in her free time with her family.

Jean Lopez, Client Services Director

 When it comes to client relations, Jean Lopez gets an A+. This former schoolteacher is a member of our administrative team and has already shown us that she really knows her stuff. She holds a degree in psychology from San Diego State and has 30 years of work experience in the veterinary field. Jean is the proud mom to 4 boys, 2 of those being Yorkshire Terriers. In her spare time, she enjoys hiking, baking, photography and traveling the world.

Rachel Kaittany, Client Services Representative

Julie Hailey, Veterinary Technician

Clare Hyde, Veterinary Technician

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