Table C.8-96 specifies the attributes of the MR Diffusion Functional Group Macro.
Table C.8-96. MR Diffusion Macro Attributes
|
Attribute Name |
Tag |
Type |
Attribute Description |
|---|---|---|---|
|
MR Diffusion Sequence |
(0018,9117) |
1 |
Identifies the diffusion parameters of this frame. Only a single Item shall be included in this sequence. |
|
>Diffusion b-value |
(0018,9087) |
1C |
Diffusion sensitization factor in sec/mm2. This is the actual b-value for original frames and those derived from frames with the same b-value, or the most representative b-value when derived from images with different b-values. Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise. |
|
>Diffusion Directionality |
(0018,9075) |
1C |
Specifies whether diffusion conditions for the frame are directional, or isotropic with respect to direction. Defined Terms:
Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise. |
|
>Diffusion Gradient Direction Sequence |
(0018,9076) |
1C |
Sequence containing orientations of all diffusion sensitization gradients that were applied during the acquisition of this frame. Only a single Item shall be included in this sequence. Required if Diffusion Directionality (0018,9075) equals DIRECTIONAL May be present if Diffusion Directionality (0018,9075) equals BMATRIX. |
|
>>Diffusion Gradient Orientation |
(0018,9089) |
1C |
The direction cosines of the diffusion gradient vector with respect to the patient Required if Frame Type (0008,9007) Value 1 of this frame is ORIGINAL. May be present otherwise. |
|
>Diffusion b-matrix Sequence |
(0018,9601) |
1C |
The directional diffusion sensitization expressed as a 3x3 matrix with diagonal symmetry (with six unique elements from which the other elements can be derived). The rows and columns of the matrix are the X (right to left), Y (anterior to posterior) and Z (foot to head) patient-relative orthogonal axes as defined in Section C.7.6.2.1.1. The values are in units of ms/mm2. Only a single Item shall be included in this sequence. Required if Diffusion Directionality (0018,9075) equals BMATRIX. |
|
>>Diffusion b-value XX |
(0018,9602) |
1 |
The value of b[X,X]. |
|
>>Diffusion b-value XY |
(0018,9603) |
1 |
The value of b[X,Y]. |
|
>>Diffusion b-value XZ |
(0018,9604) |
1 |
The value of b[X,Z]. |
|
>>Diffusion b-value YY |
(0018,9605) |
1 |
The value of b[Y,Y]. |
|
>>Diffusion b-value YZ |
(0018,9606) |
1 |
The value of b[Y,Z]. |
|
>>Diffusion b-value ZZ |
(0018,9607) |
1 |
The value of b[Z,Z]. |
|
>Diffusion Anisotropy Type |
(0018,9147) |
1C |
Class of diffusion anisotropy calculation. Defined Terms:
Required if Frame Type (0008,9007) value 4 equals DIFFUSION_ANISO. |