Fig. 4

Comparison of Operability, NASA-TLX, and Image Quality Scores. A Operability score, B NASA-Task Load Index (NASA-TLX), and C image quality score shown as radar plots for motorized endoscope (ME) and conventional endoscope (CE). Lower scores indicate better performance. Bolded items represent statistically significant differences. *P < 0.05, **P < 0.01.