“…After the first idea of applying PAT to endoscopy in 1996 [13] , a variety of device concepts have been proposed to translate its benefits into clinical settings [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] , [43] , [44] . Among these, the following are notable device concepts that are potentially applicable for GI endoscopy.…”