LogMyScan: A pilot evaluation study of a mobile phone-based ultrasound logbook application

We developed a mobile phone logbook application called LogMyScan. The study objectives were to evaluate a number of domains as per the technology acceptance model.

A prospective pilot cohort study was conducted using a version of LogMyScan and reported according to Statement on Reporting of Evaluation studies in Health Informatics. Prospective participants were directed to a website which provided information and links. Participants were recruited via email distribution lists and social media. A task list was provided, which included entering simulated scan data and navigating the application, prior to completing a questionnaire. Questions were aligned to technology acceptance model domains, and Cronbach's alpha was calculated to assess reliability.

There were 49 participants and 7 were unable to complete the image upload and editing step. Levels of agreement for usability, educational and governance/security aspects were generally good. The desirability of existing and proposed features was high for images and video clip handling, feedback and reflection and less for motivational notifications and benchmarking. Comments identified some limitations and issues on the Android platform. Cronbach's alpha demonstrated good to excellent reliability: 0.87 (95% confidence interval, 0.79-0.91) for usability, educational and governance/security and 0.86 (95% confidence interval, 0.78-0.91) for desirability of existing and proposed features.

There was generally high perceived ease of use, usefulness, attitude towards use and behavioural intention to use LogMyScan. Further research is needed to evaluate LogMyScan for future iterations, allowing recruitment of a larger number of participants and evaluating user expectations prior to using, and at timed intervals after using.