Capsule medical device and capsule medical system

摘要

Radiation is captured without fail, and a sharp image of a region where radiation is generated is acquired. A capsule medical device (3) includes an excitation light source (7) that generates excitation light for irradiating an inner wall (4) of a body cavity, a CCD (9), having variable sensitivity, that captures fluorescence generated at the inner wall (4) of the body cavity by the excitation light emitted from the excitation light source (7) to acquire a two-dimensional fluorescence image, and a control unit (35) that performs control so as to reduce the sensitivity of the CCD (9) when the fluorescence intensity in at least part of the fluorescence image acquired by the CCD (9) exceeds a predetermined threshold.

主权项

1. A capsule medical device comprising:
an excitation light source that generates excitation light for irradiating an inner wall of a body cavity; an image-capturing sensor that captures radiation generated at the inner wall of the body cavity by the excitation light emitted from the excitation light source to acquire a two-dimensional radiation image, the image-capturing sensor having variable sensitivity; and a controller that determines whether a radiation intensity in at least part of the radiation image acquired by the image-capturing sensor exceeds a predetermined threshold and to control the image-capturing sensor so as to vary the sensitivity and resolution of the image-capturing sensor, wherein the controller sets the sensitivity of the image-capturing sensor to a predetermined sensitivity as an initial setting, wherein, when the radiation intensity of the radiation image acquired by the image-capturing sensor with the initial setting exceeds the predetermined threshold, the controller disables the initial setting and performs control so as to increase the resolution of the image-capturing sensor by setting the sensitivity of the image-capturing sensor lower than the predetermined sensitivity, and wherein the controller controls the image-capturing sensor to re-acquire the radiation image with the initial setting disabled.