Endoscope with multiple views and novel configurations adapted thereto

1. An endoscope system comprising:

an endoscope having a single shaft having a distal end receivable in a hollow gastrointestinal tract and a proximal end, the shaft extending from the proximal end along a longitudinal axis in a forward direction towards the distal end, the distal end having an end surface defining a vertical reference plane orthogonal to the longitudinal axis, the endoscope having, at or near the distal end, multiple cameras disposed when in operation, each of the multiple cameras having a different respective field of view (FOV), the multiple cameras including a subset of at least two side view cameras each disposed on a respective side periphery of the single shaft and having a respective sideward FOV including a respective obtuse angle to the forward direction of the longitudinal axis, the multiple cameras further including one front view camera disposed facing the forward direction of the longitudinal axis and having a frontward FOV, the multiple cameras further including a rear view camera disposed in front of the distal end, facing a rearward direction of the longitudinal axis, and having a rearward FOV covering at least one portion of the end surface of the distal end; and

an image processing box adapted to receive respective images of the different respective FOVs from the respective multiple cameras and process the received respective image to form a consolidated image using image-stitching techniques, the consolidated image configured to cover a 360-degree view with respect to at least one point on the end surface of the distal end, the 360-degree view being in a horizontal reference plane orthogonal to the vertical reference plane, the horizontal reference plane being in parallel to, or encompassing, the longitudinal axis.

2. The endoscope system as claimed in claim 1 , wherein the rear view camera is disposed in front of the distal end through a deployment performed using a catheter extended inside through the hollow channel.

3. The endoscope system as claimed in claim 1 , wherein the consolidated image includes a first component image situated separate and next to a second component image formed using the respective images of the different respective FOVs received from the front view camera and the subset of at least two side view cameras, the second component image being a consolidated component image formed using image-stitching techniques, the first component image formed using the respective image of the respective FOV received from the rear view camera, the subset of at least two side view cameras including at least four side view cameras each having one respective representative point intersecting with a respective vertical cross section plane situated in parallel to the vertical reference plane of the end surface of the distal end, each of the four respective representative points, in reference to the vertical reference plane through projection, being ninety (90) degrees relative to one adjacent representative point of the four respective representative points with respect to a center point on the vertical reference plane.

4. The endoscope system as claimed in claim 3 , the second component image, which is a consolidated component image, is configured to have, in a center area thereof, a center sub-component image formed using the respective image of the frontward FOV of the front view camera, and is further configured to have four sub-component images respectively formed using the images of the four sideward FOVs of the subset of four side view cameras and collectively surround the center sub-component image.