APPARATUS AND METHOD FOR SCANNING A STRUCTURE

摘要

A subsea apparatus (1, 101, 201) and method for scanning a subsea structure (6, 106, 207) to detect differences in density between different parts of the subsea structure (6, 106, 207) is described. A source (2, 102, 204) of gamma radiation and a plurality of detectors (3a - 3g, 103a- 103h) arranged to detect gamma radiation emitted by the source are provided. The subsea structure (6, 106, 207) is positioned between the source (2, 102, 204) and the detectors (3a - 3g, 103a-103h) and the detectors (3a - 3g, 103a-103h) and the source (2, 102, 204) rotated in a fixed relationship to each other about an axis of rotation (5) located between the detectors(3a - 3g, 103a-103h) and the source (2, 102, 204). The plurality of detectors (3a - 3g, 103a-103h) are arranged in a linear array (4, 104, 205), the linear array (4, 104, 205) being substantially parallel to the axis of rotation (5). A pixelated detector array (420, 440) and a source container (501) are also disclosed.