Training with Perk Tutor improves ultrasound-guided in-plane needle insertion skill

Hillary Lia, Zsuzsanna Keri, Matthew S. Holden, Vinyas Harish, Christopher H. Mitchell, Tamas Ungi, Gabor Fichtinger

Research output: Chapter in Book/Conference paperConference paperpeer-review

3 Citations (Scopus)


PURPOSE: The open-source Perk Tutor training platform has been shown to improve trainee performance in interventions that require ultrasound guidance. Our goal was to determine if needle coordination of medical trainees can be improved by training with Perk Tutor compared to training with ultrasound only.

METHODS: Twenty participants with no previous experience were randomized into two groups; the Perk Tutor group and the Control group. The Perk Tutor group had access to the 3D visualization while the Control group used ultrasound only during their training. Performance was analyzed, measured and compared by Perk Tutor with regards to four needle coordination metrics. None of the groups had access to 3D visualization during performance testing.

RESULTS: The needle tracking measurements showed, for the Perk Tutor group, lower average distance between the needle tip and ultrasound (1.2 [0.9 - 2.8] mm vs 2.7 [2.3 - 4.0] mm, respectively; P = 0.023) and lower maximum distance between the needle tip and ultrasound (2.2 [1.9 - 3.2] mm vs 4.6 [3.9 - 6.2] mm, respectively; P = 0.013). There was no significant difference in average needle to ultrasound plane angle and maximum needle to ultrasound plane distance. All participants were successful in the procedure.

CONCLUSION: The Perk Tutor group had significantly reduced distance from the needle tip to the ultrasound plane. Training with Perk Tutor can improve trainees' needle and ultrasound coordination.

Original languageEnglish
Title of host publicationMedical imaging 2017
Subtitle of host publicationImage-Guided Procedures, Robotic Interventions, and Modeling
EditorsRobert J. Webster, Baowei Fei
Place of PublicationUnited States
Number of pages8
ISBN (Electronic)9781510607156
ISBN (Print)9781510607156
Publication statusPublished - 2017
Externally publishedYes
Event2017 Conference on Medical Imaging - Orlando, United States
Duration: 14 Feb 201716 Feb 2017

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


Conference2017 Conference on Medical Imaging
Country/TerritoryUnited States


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