Method and apparatus of adaptive leakage reduction for processor used in a capsule endoscope

A method of imaging gastrointestinal tract by using a capsule endoscope, the method comprising:

• determining at least two operating states during a course of gastrointestinal examination using the capsule endoscope, wherein said at least two operating states comprise a first operating state and a second operating state, the capsule endoscope comprises one or more capsule processors equipped with a back bias control;
• in response to a current operating state being the first operating state or the second operating state, setting current body biasing for said one or more capsule processors to a first body biasing or a second body biasing accordingly, wherein the first body biasing is different from the second body biasing;
• and
• capturing one or more images using the current body biasing for said one or more capsule processors, and
• wherein the first operating state corresponds to a fast frame rate operation and the second operating state corresponds to a regular frame rate operation.

A method of imaging gastrointestinal tract by using a capsule endoscope, the method comprising:

• determining at least two operating states during a course of gastrointestinal examination using the capsule endoscope, wherein said at least two operating states comprise a first operating state and a second operating state, the capsule endoscope comprises one or more capsule processors equipped with a back bias control;
• in response to a current operating state being the first operating state or the second operating state, setting current body biasing for said one or more capsule processors to a first body biasing or a second body biasing accordingly, wherein the first body biasing is different from the second body biasing;
• and
• capturing one or more images using the current body biasing for said one or more capsule processors, and
• wherein the first operating state corresponds to a high definition operation and the second operating state corresponds to a regular definition operation.

A non-transitory computer-readable medium having stored thereon a computer-readable code executable by a processor to cause the processor to:

• determine at least two operating states during a course of gastrointestinal examination using a capsule endoscope, wherein said at least two operating states comprise a first operating state and a second operating state, and the capsule endoscope comprises one or more capsule processors equipped with a back bias control;
• in response to a current operating state being the first operating state or the second operating state, set current body biasing for said one or more capsule processors to a first body biasing or a second body biasing accordingly, wherein the first body biasing is different from the second body biasing;
• and
• capture one or more images using the current body biasing for said one or more capsule processors, and
• wherein the first operating state corresponds to the capsule endoscope in esophagus or prior to reaching the esophagus, and the second operating state corresponds to the capsule endoscope in a part of human gastrointestinal distal to the esophagus.

A capsule endoscope for capturing in vivo images, comprising:

• an image sensor to capture images;
• a light source to provide illumination for the image sensor;
• one or more capsule processors equipped with a back bias control;
• a battery to provide power to the image sensor, the light source and said one or more capsule processors;
• and
• a capsule housing adapted to be swallowed, wherein the image sensor the light source, said one or more capsule processors and the battery are enclosed in the capsule housing;
• wherein the image sensor, the light source and said one or more capsule processors are configured to:
• determine at least two operating states during a course of gastrointestinal examination using the capsule endoscope, wherein said at least two operating states comprise a first operating state and a second operating state;
• in response to a current operating state being the first operating state or the second operating state, set current body biasing for said one or more capsule processors to a first body biasing or a second body biasing accordingly, wherein the first body biasing is different from the second body biasing;
• and
• capture one or more images using the current body biasing for said one or more capsule processors, and
• wherein the first operating state corresponds to the capsule endoscope in esophagus or prior to reaching the esophagus, and the second operating state corresponds to the capsule endoscope in a part of human gastrointestinal distal to the esophagus.

A capsule endoscope for capturing in vivo images, comprising:

• an image sensor to capture images;
• a light source to provide illumination for the image sensor;
• one or more capsule processors equipped with a back bias control;
• a battery to provide power to the image sensor, the light source and said one or more capsule processors;
• and
• a capsule housing adapted to be swallowed, wherein the image sensor the light source, said one or more capsule processors and the battery are enclosed in the capsule housing;
• wherein the image sensor, the light source and said one or more capsule processors are configured to:
• determine at least two operating states during a course of gastrointestinal examination using the capsule endoscope, wherein said at least two operating states comprise a first operating state and a second operating state;
• in response to a current operating state being the first operating state or the second operating state, set current body biasing for said one or more capsule processors to a first body biasing or a second body biasing accordingly, wherein the first body biasing is different from the second body biasing;
• and
• capture one or more images using the current body biasing for said one or more capsule processors, and
• wherein the first operating state corresponds to a fast frame rate operation and the second operating state corresponds to a regular frame rate operation.

A capsule endoscope for capturing in vivo images, comprising:

• an image sensor to capture images;
• a light source to provide illumination for the image sensor;
• one or more capsule processors equipped with a back bias control;
• a battery to provide power to the image sensor, the light source and said one or more capsule processors;
• and
• a capsule housing adapted to be swallowed, wherein the image sensor the light source, said one or more capsule processors and the battery are enclosed in the capsule housing;
• wherein the image sensor, the light source and said one or more capsule processors are configured to:
• determine at least two operating states during a course of gastrointestinal examination using the capsule endoscope, wherein said at least two operating states comprise a first operating state and a second operating state;
• in response to a current operating state being the first operating state or the second operating state, set current body biasing for said one or more capsule processors to a first body biasing or a second body biasing accordingly, wherein the first body biasing is different from the second body biasing;
• and
• capture one or more images using the current body biasing for said one or more capsule processors, and
• wherein the first operating state corresponds to a high definition operation and the second operating state corresponds to a regular definition operation.