150 Chapter 7 SUPPLEMENTARY S1. Usability of PerfusiX-Imaging for intestinal perfusion assessment questionnaire A questionnaire was designed to assess the usability of PerfusiX-Imaging. The questionnaire consisted of six items, each addressing a specific aspect of usability. The items were answered using the Likert scale from 1 to 5, with the 1 representing the least favorable response and 5 indicating the most favorable response. The questionnaire can be found underneath. 1. I was able to identify the intestinal watershed area using PerfusiX-Imaging 2. PerfusiX-Imaging was able to visualize tissue perfusion intraoperatively 3. Was there latency during the perfusion imaging? 4. How easy was it to setup PerfusiX-Imaging? 5. PerfusiX-Imaging was easy to use during surgery 6. How was the display quality of PerfusiX-Imaging on displaying the blood flow? 7. The PerfusiX-Imaging perfusion information reflected the expected pattern of blood flow
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