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The Collaborative for Advanced Clinical Techniques in UltraSound (CACTUS) constitutes a group of like-minded physicians, scientists, and technical experts dedicated to ultrasound technical and translational research, innovative clinical imaging, and image-guided intervention.

News and Events

Mar 2024

Three UTSW Sonographers Awarded CACTUS Status

Kristen Johnson, RDMS RVT, staff sonographer at Outpatient Building, Matthew Carrigan, BSRS, RDMS, RVT, RMSKS, Clements University Hospital (CUH) Imaging Operations Supervisor, and Angela Storto, BS, RDMS, RVT, lead sonographer at CUH, have all achieved CACTUS Status by showing consistent dedication to advancing the field of ultrasound, participating in research and quality improvement projects, and supported high-quality, patient centered care.

Dec 2023

Certificate of Appreciation awarded to CACTUS Lab and members from QIBA

The Quantitative Imaging Biomarker Alliance (QIBA) awards Certificate of Appreciation to CACTUS and lab director David Fetzer for the ongoing efforts in biomarker validation and profile development. 

Nov 2023

Two CACTUS-associated UTSW sonographers rank top in North Texas

Two of our very own sonographers were among the top 25 at the North Texas Radiologic Technologist Society’s (NTRTS) 18th annual awards ceremony for fiscal year 2023. The honorees are:  Kristen Johnson, B.S., RDMS(AB)(OB/GYN), RVT, and Angela Storto, B.S., RDMS(AB), RVT

Oct 2023

Grant awarded for innovative work in liver fat quantification

CACTUS director David Fetzer, MD, was awarded a young investigator grant from the Soceity of Radiologists in Ultrasound (SRU) to support his continued collaboration with Dr. Caroline Lux in the TRUST lab for their work in developing next-generation liver fat tissue-mimicking phantoms for quantitative ultrasound validation and translation.

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Meet the Team

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David Fetzer, M.D.​


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