C.8.22.5.6 PET Reconstruction Macro
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##### C.8.22.5.6 PET Reconstruction Macro

Table C.8.22-17 specifies the attributes of the PET Reconstruction Functional Group Macro, which describe the method used to reconstruct this image.

Table C.8.22-17. PET Reconstruction Macro Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
PET Reconstruction Sequence | (0018,9749) | 1 | Contains the attributes describing the reconstruction process for this frame. Only a single Item shall be included in this Sequence.
>Reconstruction Type | (0018,9756) | 1C | Description of the type of algorithm used when reconstructing the image from the data acquired during the acquisition process. Defined Terms: 2D 3D 3D_REBINNED Required if Frame Type (0008,9007) Value 1 equals ORIGINAL. May be present otherwise.
>Reconstruction Algorithm | (0018,9315) | 1C | Description of the algorithm used when reconstructing the image from the data acquired during the acquisition process. Defined Terms: FILTER_BACK_PROJ REPROJECTION RAMLA MLEM Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise.
>Iterative Reconstruction Method | (0018,9769) | 1 | Iterative Reconstruction Method used. Enumerated Values: YES NO
>Number of Iterations | (0018,9739) | 1C | Number of iterations. Required if Frame Type (0008,9007) Value 1 equals ORIGINAL and Iterative Reconstruction Method (0018,9769) equals YES. May be present otherwise.
>Number of Subsets | (0018,9740) | 1C | Number of subsets. Required if Frame Type (0008,9007)) Value 1 equals ORIGINAL and Iterative Reconstruction Method (0018,9769) equals YES. May be present otherwise.
>Reconstruction Diameter | (0018,1100) | 1C | The diameter in mm of the region from which data were used in creating the reconstruction of the image. Data may exist outside this region and portions of the patient may exist outside this region. See Section C.8.22.5.4.1. Required if Frame Type (0008,9007) Value 1 equals ORIGINAL and Reconstruction Field of View (0018,9317) is not present. Otherwise may be present if Frame Type (0008,9007) Value 1 equals DERIVED and Reconstruction Field of View (0018,9317) is not present.
>Reconstruction Field of View | (0018,9317) | 1C | The field of view width (x-dimension) followed by height (y-dimension) as used for reconstruction in mm. Required if Image Type (0008,9007) Value 1 equals ORIGINAL and Reconstruction Diameter (0018,1100) is not present. Otherwise may be present if Frame Type (0008,9007) Value 1 equals DERIVED and Reconstruction Diameter (0018,1100) is not present.

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