C.8.25.14.3 Ophthalmic Axial Measurements Related Information Macro

Table C.8.25.14-4 describes the attributes for the Ophthalmic Axial Measurements Related Information Macro.

Table C.8.25.14-4 OPHTHALMIC AXIAL MEASUREMENTS RELATED INFORMATION MACRO

Attribute Name Tag Type Attribute Description
Ultrasound Ophthalmic Axial Length Measurements Sequence (0022,1220) 1C Related information about an axial length measurement being performed on an ultrasound device. Only a single Item shall be included in this sequence. Required if Ophthalmic Axial Measurements Device Type (0022,1009) is ULTRASOUND.
>Ophthalmic Axial Length Velocity (0022,1059) 1 The sound velocity used in calculating the Ophthalmic Axial Length Measurement Value (0022,1019), in m/sec.
>Observer Type (0040,A084) 1 Method used to select which acquired axial length measurement values are kept. Enumerated Values: PSN = Person; manually selected DEV = Device; automatically selected See section C.8.25.14.1.1.5 for further explanation.
>Ophthalmic Axial Length Data Source Code Sequence (0022,1150) 1 Source of the value recorded in Ophthalmic Axial Length (0022,1019). Only a single Item shall be included in this sequence.
>>Include 'Code Sequence Macro' Table 8.8-1. Defined Context ID is 4240
>Ophthalmic Axial Length Data Source Description (0022,1159) 3 A free text description of the axial length measurement data source.
Optical Ophthalmic Axial Length Measurements Sequence (0022,1225) 1C Related information about an axial length measurement being performed on an optical device. Only a single Item shall be included in this sequence. Required if Ophthalmic Axial Measurements Device Type (0022,1009) is OPTICAL.
>Signal to Noise Ratio (0022,1155) 1C The ratio of signal power to the background noise power (P signal/ P noise). Required if Ophthalmic Axial Length Measurements Type (0022,1010) is TOTAL LENGTH. May be present otherwise.
>Ophthalmic Axial Length Data Source Code Sequence (0022,1150) 1 The source of the value in Ophthalmic Axial Length (0022,1019). Only a single Item shall be included in this sequence.
>>Include 'Code Sequence Macro' Table 8.8-1. Defined Context ID is 4240
>Ophthalmic Axial Length Data Source Description (0022,1159) 3 A free text description of the axial length measurement data source.