Clarify Enhanced US Volume Image and Frame Type Values 3 and 4 Image Type (0008,0008) is specified to be Type 1 with the following constraints: ORIGINAL DERIVED PRIMARY Value 3 (Image Flavor) and Value 4 are not used

Value 1 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in . No additional requirements or Enumerated Values.

Value 2 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in . No additional requirements or Enumerated Values.

Value 3 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in . No additional requirements or Defined Terms.

Value 4 of Image Type (0008,0008) and Frame Type (0008,9007) is discussed in . No additional requirements or Defined Terms.

specifies the attributes of the US Image Description Functional Group Macro.

US Image Description Macro Attributes

Attribute Name	Tag	Type	Attribute Description
US Image Description Sequence	(0018,9806)	1	A sequence that describes a general description of this image or frame. Only a single Item shall be included in this sequence.
>Frame Type	(0008,9007)	1	Type of Frame. A multi-valued attribute analogous to Image Type (0008,0008). Enumerated Values and Defined Terms are the same as those for the four values of Image Type (0008,0008), except that the value MIXED is not allowed. See .
>Volumetric Properties	(0008,9206)	1	Indication if geometric manipulations are possible with frames in the SOP Instance. See for a description and Enumerated Values.
>Volume Based Calculation Technique	(0008,9207)	1	Method used for volume calculations with frames in the SOP Instance. See for a description and Defined Terms.

If Volumetric Properties (0008,9206) is VOLUME and Volume Based Calculation Technique (0008,9207) is NONE, all frames in the frame set shall be spaced the same Z-distance from adjacent frames (i.e., spacing between slices is constant).

Value 1 of Image Type (0008,0008) and Frame Type (0008,9007) shall use one of the following Enumerated Values from . Value 1 of Image Type (0008,0008) and Value 1 of Frame Type (0008,9007) shall not be zero length.

Image Type and Frame Type Value 1

Enumerated Value Name	Enumerated Value Description
ORIGINAL	An image or frame is original if its pixel data was directly reconstructed from the original data that is obtained from the sensors of the imaging equipment, Image Type (0008,0008) Value 4 is NONE, and Volume Based Calculation Technique (0008,9207) is NONE. For MR, original data is data directly reconstructed from k-space data. For CT, original frames are those directly reconstructed from projection data.
DERIVED	An image or frame is derived if its pixel data was calculated from original or other derived pixel data (i.e., it is not original).
MIXED	Used only as a value in Image Type (0008,0008) if frames within the SOP Instance contain different values for Value 1 in their Frame Type (0008,9007).

Value 2 for Image Type (0008,0008) and Frame Type (0008,9007) follows the standard definition and shall have the following Enumerated Value from . Value 2 of Image Type (0008,0008) and Value 2 of Frame Type (0008,9007) shall not be zero length.

Image Type and Frame Type Value 2

Enumerated Value Name	Enumerated Value Description
PRIMARY	See

Value 3 is an overall representation of the image type. This value may be a summary of several other attributes or a duplication of one of the other attributes to indicate the most important aspect of this image. Value 3 Image Flavor is to be used with Value 4 Derived Pixel Contrast to indicate the nature of the image set. For example Value 3 = DIFFUSION together with Value 4 = NONE indicates that the image set was originally collected for DIFFUSION. If Value 3 = DIFFUSION together with Value 4 = DIFFUSION this indicates that the object contains DIFFUSION weighted post processed images. Value 3 of Image Type (0008,0008) shall not be zero length. Value 3 of Frame Type (0008,9007) may have the same value as found in Value 3 of Image Type (0008,0008), or may have a different value or may be of zero length. The attribute value may not be MIXED as this value needs to be a summary of the primary purpose of the images, whether the frames have the same value or not. specifies the Defined Terms for Value 3 for Image Type (0008,0008) and Frame Type (0008,9007) that are common to CT and MR. Additional Defined Terms are defined in the modality-specific Module and Macro definitions.

Image Type and Frame Type Value 3 Common

Defined Term Name	Defined Term Description
ANGIO	Collected for the purpose of angiography
CARDIAC	Images of the heart
CARDIAC_GATED	Cardiac gated images, other than of the heart
CARDRESP_GATED	Cardiac and respiratory gated images
DYNAMIC	An image in which the same anatomical volume is imaged at multiple times in order to capture images of a non-cyclic, time varying event. For example, imaging of the uptake of a tracer or contrast in a specific organ over time. This is different from gating techniques, in which the same anatomical volume is imaged during some portion of a cyclic event, e.g., inspiration or R-R Interval.
FLUOROSCOPY	Real-time collection of single slices (e.g., CT or MR Fluoroscopy)
LOCALIZER	Collected for the purpose of planning other images.
MOTION	Collected for looking at body motion
PERFUSION	Collected for the purposes of perfusion calculations.
PRE_CONTRAST	Collected before contrast was administered
POST_CONTRAST	Collected during or after contrast was administered
RESP_GATED	Respiratory gated images
REST	Cardiac rest image set
STATIC	A group of frames at varying spatial locations acquired at the same time.
STRESS	Cardiac stress image set
VOLUME	Set of frames that define a regularly sampled volume
NON_PARALLEL	Set of frames that are not parallel
PARALLEL	Set of frames that are parallel but do not constitute a regularly sampled volume
WHOLE_BODY	A group of frames of the whole body; the frames may be acquired at various times (as distinct from STATIC).

Value 4 shall be used to indicate derived pixel contrast - generally, contrast created by combining or processing images with the same geometry. Value 4 shall have a value of NONE when Value 1 is ORIGINAL. If more than one of the following derived types is applicable, then it is up to the generating application to specify the value that best characterizes the derived image. Value 4 of Image Type (0008,0008) and Value 4 of Frame Type (0008,9007) shall not be zero length unless the SOP Class UID is "1.2.840.10008.5.1.4.1.1.2.2" or "1.2.840.10008.5.1.4.1.1.4.4" or "1.2.840.10008.5.1.4.1.1.128.1" (Legacy Converted). specifies the Defined Terms for Value 4 for Image Type (0008,0008) and Frame Type (0008,9007) that are common to CT and MR. Additional Defined Terms are defined in the modality-specific Module and Macro definitions.

Image Type and Frame Type Value 4 Common

Defined Term Name	Defined Term Description
ADDITION	Created through Pixel by pixel addition operation
DIVISION	Created through Pixel by pixel division operation
MASKED	Created through Pixel by pixel masking operation
MAXIMUM	Created through Pixel by Pixel Maximum operation
MEAN	Created through Pixel by pixel mean operation
MINIMUM	Created through Pixel by Pixel Minimum operation
MTT	Mean Transit Time
MULTIPLICATION	Created through Pixel by pixel multiplication operation
RCBF	Regional Cerebral Blood Flow (rCBF)
RCBV	Regional Cerebral Blood Volume (rCBV)
RESAMPLED	Pixels have been spatially re-sampled, e.g., MPR
STD_DEVIATION	Standard Deviation
SUBTRACTION	Created through Pixel by pixel subtraction operation
T_TEST	Student's T-Test
TTP	Time To Peak map
Z_SCORE	Z-Score Map
NONE	Not a calculated image
MIXED	Used only as value in Image Type (0008,0008) if frames within the image SOP Instance contain different values for value 4 in their Frame Type (0008,9007) attribute.

Image Type (0008,0008) identifies important image identification characteristics. These characteristics are: Pixel Data Characteristics is the image an ORIGINAL Image; an image whose pixel values are based on original or source data is the image a DERIVED Image; an image whose pixel values have been derived in some manner from the pixel value of one or more other images Patient Examination Characteristics is the image a PRIMARY Image; an image created as a direct result of the Patient examination is the image a SECONDARY Image; an image created after the initial Patient examination Modality Specific Characteristics Implementation specific identifiers; other implementation specific identifiers shall be documented in an implementation's conformance statement. The Image Type attribute is multi-valued and shall be provided in the following manner: Value 1 shall identify the Pixel Data Characteristics ORIGINAL identifies an Original Image DERIVED identifies a Derived Image Value 2 shall identify the Patient Examination Characteristics PRIMARY identifies a Primary Image SECONDARY identifies a Secondary Image Value 3 shall identify any Image IOD specific specialization (optional) Other Values that are implementation specific (optional) Any of the optional values (value 3 and beyond) may be sent either with a value or zero-length, independent of other optional values, unless otherwise specified by a specialization of this attribute in an IOD. If the pixel data of the derived Image is different from the pixel data of the source images and this difference is expected to affect professional interpretation of the image, the Derived Image shall have a UID different than all the source images.