DICOM PS3.3 2016e - Information Object Definitions

C.8.27.5 Intravascular Image Acquisition Parameters Module
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#### C.8.27.5 Intravascular Image Acquisition Parameters Module

Table C.8.27.5-1 describes the parameters and characteristics of an intravascular image acquisition. These parameters are common to both IVUS and IVOCT.

Table C.8.27.5-1. Intravascular Image Acquisition Parameters Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
IVUS Acquisition | (0018,3100) | 1 | Type of Intravascular Image Acquisition. Enumerated Values: MOTORIZED MANUAL SELECTIVE MEASURED See Section C.8.27.5.1.
IVUS Pullback Rate | (0018,3101) | 1C | Intravascular imaging catheter pullback rate. Specified in units of mm/sec. Required if IVUS Acquisition (0018,3100) value is MOTORIZED. See Section C.8.27.5.2.
IVUS Pullback Start Frame Number | (0018,3103) | 1C | Frame number at which the motorized portion of the acquisition begins. Required if IVUS Acquisition (0018,3100) value is MOTORIZED. See Section C.8.27.5.1.
IVUS Pullback Stop Frame Number | (0018,3104) | 1C | Frame number at which the motorized portion of the acquisition is complete. Required if IVUS Acquisition (0018,3100) value is MOTORIZED. See Section C.8.27.5.1.
Catheter Direction of Rotation | (0052,0031) | 1C | Direction of rotation of the Intravascular rotating catheter during acquisition, from the perspective of the motor, proximal to distal. Enumerated Values: CW clockwise CC counter-clockwise Required if rotational catheter is used.
Catheter Rotational Rate | (0052,0013) | 1C | Rate of rotation of the Intravascular rotating catheter during acquisition, in Hz. Required if rotational catheter is used.
Mode of Percutaneous Access Sequence | (0052,0016) | 2 | Mode of access of the Intravascular Imaging Catheter. Zero or one Item shall be included in this Sequence.
>Include Table 8.8-1 “Code Sequence Macro Attributes” | Defined CID 3746 “Percutaneous Entry Site”.

##### C.8.27.5.1 IVUS Acquisition

The attribute IVUS Acquisition (0018,3100) denotes the method used to acquire the Intravascular Images.

MOTORIZED: The Intravascular imaging catheter is positioned in the blood vessel proximal or distal to the anatomical structures to be examined. The catheter is attached to a motorized mechanism capable of either pushing forward or pulling back the catheter through the vessel at a constant velocity, as specified by the IVUS Pullback Rate (0018,3101). The motorized acquisition takes place during the time between acquisition of the IVUS Pullback Start Frame Number (0018,3103), and acquisition of the IVUS Pullback Stop Frame Number (0018,3104).

MANUAL: The Intravascular imaging catheter is positioned in the blood vessel proximal or distal to the anatomical structures to be examined. The catheter is then manually pulled back or pushed forward through the vessel segment of interest.

SELECTIVE: The Intravascular imaging catheter is positioned in the blood vessel. The catheter is then manually pushed forward and/or pulled back to examine the anatomical structures in the vessel.

MEASURED: The Intravascular imaging catheter is positioned in the blood vessel near the anatomical structures to be examined. The catheter is then pulled back or pushed forward through the vessel segment of interest. The longitudinal movement between each acquired frame is measured and recorded. See Section C.8.27.6.2 for more information.

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DICOM PS3.3 2016e - Information Object Definitions