PTH-024 Novel capsule endoscope with 3D reconstruction and lesions size calculation: first study with MiroCam MC4000

Abstract

Table 1 Endoscopic investigations & findings Investigation Performed <1 year before ACS (n = 113) Performed <1 year after ACS (n = 113) Overall Incidence of significant findings Gastroscopy 10% 19% 28% Lower Gi investigations (Colonoscopy, sigmoidoscopy or CT pneumocolon) 11% 17% 32%Only a minority of patients had endoscopic investigations for anaemia (table 1). Significant findings (ulcers, active bleeding or cancer) were found at 28% gastroscopy more commonly in patients with STEMI (45%). Significant findings (polpys, cancer, proctitis) were found at 32% lower GI investigations. No endoscopic complications occurred.69% STEMI and 27% NSTEMI patients had coronary stenting. 81% patients were discharged on dual antiplatelet therapy and 16% on anti-coagulation. 1-year outcome data were available for 99/113. Crude mortality was 24%. 7.1% patients developed overt GI bleeding during admission or in the year after ACS. Conclusions Anaemia is common in patients presenting with ACS. Adequate gastrointestinal investigations were only performed on a minority of these patients but when completed showed a high incidence of iron deficiency and important findings at endoscopy. This patient group has a significant risk of both bleeding and ischaemia and could benefit from complete investigation of their anaemia.

Gastric examination using a novel three-dimensional magnetically assisted capsule endoscope and a hand-held magnetic controller: A porcine model study

“…However, several studies reporting the feasibility of 3D software showed inconsistent findings [ 27 – 29 ]. A recently developed 3D CE (MiroCam ® MC 4000, Intromedic Co. Ltd, Seoul, Korea) is the first hardware-enabled 3D reconstruction device to use stereo matching technology [ 30 ], and has been demonstrated in phantom models to estimate the size of an object within 10% relative error to its actual size [ 17 , 31 ]. The 3D MACE presented in our study represents a new model providing additional magnetic control to the 3D CE.…”

Challenges of 3D Surface Reconstruction in Capsule Endoscopy

“…The importance of 3D reconstruction in various aspects of capsule endoscopy imaging has been well-established, as reported by several works [1,2,[4][5][6][7][8][9][10]16,31,32]. For example, these works highlight the benefits of 3D reconstruction in tasks such as characterizing subepithelial tumors [31], accurate measurements [32], enhanced lesion visualization [7], and promising results for polypoid structures and angioectasias [8]. In addition, according to authors in [2,6], the 3D reconstruction could provide clear surface recovery and improve the perception of the gastrointestinal (GI) tract.…”

“…This suggests that the lack of achieving 100% enhancement of visualization features can be attributed to the overlooking of 3D visualization challenges, particularly the failure to address the importance of a determinate line of sight. In [32], authors did not assess the effects of 3D visualization using the MiroCam MC4000 but instead evaluated its reliability in reconstructing 3D images and accurately calculating lesion size within a phantom model. The authors highlighted that the MiroCam MC4000 utilizes stereo-matching technology to enable the reconstruction of selected images in a 3D format for size calculation.…”

3D reconstruction of small bowel lesions using stereo camera-based capsule endoscopy

“…To consider the smoothness constraint with neighbouring pixels, we applied the SGM (Semi-Global Matching) to minimize the cost function with the constraint of the direct attenuation model 8,11 . With the aid of dual image sensors and a depth estimation algorithm, MC 4000 can render the 3D structure of the small bowel and estimate the size of the lesion within 10% relative error to the actual size, which has been demonstrated by a large bowel phantom model and plastic shaft phantom model 8,12 . Video clips showing the function of 3D reconstruction and size measurement are included (see Supplementary Videos S2 and S3).…”