DICOM PS3.3 2024a - Information Object Definitions

C.8.34.5 Photoacoustic Functional Group Macros

The following Sections contain Functional Group Macros specific to the Photoacoustic IOD.

Note

The Attribute descriptions in the Functional Group Macros are written as if they were applicable to a single frame (i.e., the Macro is part of the Per-Frame Functional Groups Sequence). If an Attribute is applicable to all frames (i.e., the Macro is part of the Shared Functional Groups Sequence) the phrase "this frame" in the Attribute description shall be interpreted to mean " for all frames".

C.8.34.5.1 Photoacoustic Excitation Characteristics Macro

Table C.8.34.5.1-1 are Photoacoustic excitation attributes that are recorded during Photoacoustic frame acquisition and may vary across frames.

Table C.8.34.5.1-1. Photoacoustic Excitation Characteristics Macro Attributes

Attribute Name

Tag

Type

Attribute Description

Photoacoustic Excitation Characteristics Sequence

(0018,9821)

1

Characteristics of the light emitted by the illuminator, used for excitation of the target in Photoacoustic Imaging of this frame. These values are recorded during Photoacoustic frame acquisition.

One or more Items shall be included in this Sequence.

The number of items shall correspond to the items in the Excitation Wavelength Sequence (0018,9825).

>Excitation Wavelength

(0018,9826)

1

The wavelength in nm of the optical excitation pulse from the illuminator.

>Excitation Spectral Width

(0018,9822)

3

Full width at half maximum (FWHM) of the emitted optical spectrum in nm.

>Excitation Energy

(0018,9823)

3

The optical energy of the excitation pulse in mJ.

>Excitation Pulse Duration

(0018,9824)

3

The pulse duration of the excitation pulse in ns, measured as the time interval between the half-power points on the leading and trailing edges of the pulse.


DICOM PS3.3 2024a - Information Object Definitions