DICOM PS3.3 2024d - Information Object Definitions |
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Table C.8.17.7-1 specifies the Attributes of the Ophthalmic Tomography Image Module, which describe an Image produced by Ophthalmic Tomography imaging modalities.
Table C.8.17.7-1. Ophthalmic Tomography Image Module Attributes
Whether this SOP Instance is suitable for OCT volumetric processing. See Section C.8.17.7.1 for further explanation. Required if this SOP Instance is suitable for OCT volumetric processing. May be present otherwise. |
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Image identification characteristics. See Section C.7.6.1.1.2 for Enumerated Values and Defined Terms and further explanation. |
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Number of samples (planes) in this image. See Section C.7.6.3.1.1 for further explanation. |
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The date and time that the acquisition of data started. NoteThe synchronization of this time with an external clock is specified in the Synchronization Module in Acquisition Time Synchronized (0018,1800). |
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The scan time in seconds used to create all frames of an Ophthalmic Tomography image. Required if Image Type (0008,0008) Value 1 is ORIGINAL. May be present otherwise. |
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A number identifying the single continuous gathering of data over a period of time that resulted in this image. |
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Number of bits allocated for each pixel sample. Each sample shall have the same number of bits allocated. |
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Number of bits stored for each pixel sample. Each sample shall have the same number of bits stored. |
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Most significant bit for pixel sample data. Each sample shall have the same high bit. |
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Specifies an identity transformation for the Presentation LUT, such that the output of all grayscale transformations defined in the IOD containing this Module are defined to be P-Values. |
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Specifies whether an Image has undergone lossy compression (at a point in its lifetime). Enumerated Values: Once this value has been set to "01" it shall not be reset. See Section C.7.6.1.1.5. |
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Describes the approximate lossy compression ratio(s) that have been applied to this image. |
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A label for the lossy compression method(s) that have been applied to this image. |
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Indicates whether or not image contains sufficient burned in annotation to identify the patient and date the image was acquired. |
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Indicates whether or not the image contains sufficiently recognizable visual features to allow the image or a reconstruction from a set of images to identify the patient. If this Attribute is absent, then the image may or may not contain recognizable visual features. |
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Offset of the first frame in a multi-frame image of a concatenation. |
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Identifier for one SOP Instance belonging to a concatenation. |
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The number of SOP Instances sharing the same Concatenation UID (0020,9161). See Section C.8.17.16.3 for further explanation. |
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The value constraints on Concatenation Frame Offset Number (0020,9228), In-concatenation Number (0020,9162), and In-concatenation Total Number (0020,9163) have the effect of preventing the use of concatenations.
The Attribute Ophthalmic Volumetric Properties Flag (0022,1622) is YES when the Ophthalmic Tomography Image Storage SOP Instance encodes volumetric spatial information (e.g. Frame of Reference, Pixel Measures, Plane Orientation, Plane Position, etc.). For example, ophthalmic tomography volumetric information is required when implementations encode Surface Segmentation SOP Instance(s) (e.g., surface segmentation is applied to the structural OCT volume to delineate the anatomical boundaries) and/or an Ophthalmic Optical Coherence Tomography B-scan Volume Analysis Storage SOP Instance (e.g., angiographic (blood flow) volume information) based upon the volumetric Ophthalmic Tomography Image Storage SOP Instance.
The coordinate system of the Ophthalmic Tomography Image is typically deformed from the nominal Patient-based Coordinate System. The Frame of Reference UID (0020,0052) identifies volumetric space as represented by the voxels of the SOP Instance, including any such deformations. The values of the Attributes of the Pixel Measures, Plane Position (Patient), and Plane Orientation (Patient) Functional Groups are nominal, and should not be assumed to be usable for computing real-world locations in the patient.
DICOM PS3.3 2024d - Information Object Definitions |
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