Image Type

(0008,0008)

1

Image identification characteristics. See Section C.8.2.1.1.1 for specialization.

Samples per Pixel

(0028,0002)

1

Number of samples (planes) in this image. See Section C.8.2.1.1.2 for specialization.

Photometric Interpretation

(0028,0004)

1

Specifies the intended interpretation of the pixel data. See Section C.8.2.1.1.3 for specialization.

Bits Allocated

(0028,0100)

1

Number of bits allocated for each pixel sample. Each sample shall have the same number of bits allocated. See Section C.8.2.1.1.4 for specialization.

Bits Stored

(0028,0101)

1

Number of bits stored for each pixel sample. Each sample shall have the same number of bits stored. See Section C.8.2.1.1.5 for specialization.

High Bit

(0028,0102)

1

Most significant bit for pixel sample data. Each sample shall have the same high bit. See Section C.8.2.1.1.6 for specialization.

Rescale Intercept

(0028,1052)

1

The value b in relationship between stored values (SV) and the output units.

Output units = m*SV+b

If Image Type (0008,0008) Value 1 is ORIGINAL and Value 3 is not LOCALIZER, output units shall be Hounsfield Units (HU).

Rescale Slope

(0028,1053)

1

m in the equation specified in Rescale Intercept (0028,1052).

Rescale Type

(0028,1054)

1C

Specifies the output units of Rescale Slope (0028,1053) and Rescale Intercept (0028,1052).

See Section C.11.1.1.2 for Defined Terms and further explanation.

Required if the Rescale Type is not HU (Hounsfield Units). May be present otherwise.

KVP

(0018,0060)

2

Peak kilo voltage output of the x-ray generator used

Acquisition Number

(0020,0012)

2

A number identifying the single continuous gathering of data over a period of time that resulted in this image

Scan Options

(0018,0022)

3

Parameters of scanning sequence.

Data Collection Diameter

(0018,0090)

3

The diameter in mm of the region over which data were collected

Data Collection Center (Patient)

(0018,9313)

3

The x, y, and z coordinates (in the patient coordinate system) in mm of the center of the region in which data were collected. See Section C.8.15.3.6.1.

Reconstruction Diameter

(0018,1100)

3

Diameter in mm of the region from within 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.

Reconstruction Target Center (Patient)

(0018,9318)

3

The x, y, and z coordinates (in the patient coordinate system) of the reconstruction center target point as used for reconstruction in mm. See Section C.8.15.3.6.1.

Distance Source to Detector

(0018,1110)

3

Distance in mm from source to detector center.

Distance Source to Patient

(0018,1111)

3

Distance in mm from source to isocenter (center of field of view).

Gantry/Detector Tilt

(0018,1120)

3

Nominal angle of tilt in degrees of the scanning gantry. Not intended for mathematical computations.

Table Height

(0018,1130)

3

The distance in mm of the top of the patient table to the center of rotation; below the center is positive.

Rotation Direction

(0018,1140)

3

Direction of rotation of the source when relevant, about nearest principal axis of equipment.

Exposure Time

(0018,1150)

3

Time of x-ray exposure in msec.

If Acquisition Type (0018,9302) equals SPIRAL, the value of this attribute shall be Revolution Time (0018,9305) divided by the Spiral Pitch Factor (0018,9311). See Section C.8.15.3.8.1 and Section C.8.15.3.2.1.

X-Ray Tube Current

(0018,1151)

3

X-Ray Tube Current in mA.

Exposure

(0018,1152)

3

The exposure expressed in mAs, for example calculated from Exposure Time and X-Ray Tube Current.

Exposure in µAs

(0018,1153)

3

The exposure expressed in µAs, for example calculated from Exposure Time and X-Ray Tube Current.

Filter Type

(0018,1160)

3

Label for the type of filter inserted into the x-ray beam.

Generator Power

(0018,1170)

3

Power in kW to the x-ray generator.

Focal Spot(s)

(0018,1190)

3

Size of the focal spot in mm. For devices with variable focal spot or multiple focal spots, small dimension followed by large dimension.

Convolution Kernel

(0018,1210)

3

A label describing the convolution kernel or algorithm used to reconstruct the data

Revolution Time

(0018,9305)

3

The time in seconds of a complete revolution of the source around the gantry orbit.

Single Collimation Width

(0018,9306)

3

The width of a single row of acquired data (in mm).

Total Collimation Width

(0018,9307)

3

The width of the total collimation (in mm) over the area of active x-ray detection.

Table Speed

(0018,9309)

3

The distance in mm that the table moves in one second during the gathering of data that resulted in this image.

Table Feed per Rotation

(0018,9310)

3

Motion of the table (in mm) during a complete revolution of the source around the gantry orbit.

Spiral Pitch Factor

(0018,9311)

3

Ratio of the Table Feed per Rotation (0018,9310) to the Total Collimation Width (0018,9307).

Exposure Modulation Type

(0018,9323)

3

A label describing the type of exposure modulation used for the purpose of limiting the dose.

Estimated Dose Saving

(0018,9324)

3

A percent value of dose saving due to the use of Exposure Modulation Type (0018,9323). A negative percent value of dose savings reflects an increase of exposure.

CTDIvol

(0018,9345)

3

Computed Tomography Dose Index (CTDI_vol), in mGy according to IEC 60601-2-44, Ed.2.1 (Clause 29.1.103.4), The Volume CTDI_vol. It describes the average dose for this image for the selected CT conditions of operation.

CTDI Phantom Type Code Sequence

(0018,9346)

3

The type of phantom used for CTDI measurement according to IEC 60601-2-44.

Only a single Item is permitted in this Sequence.

>Include Table 8.8-1 “Code Sequence Macro Attributes”

Defined CID 4052 “Phantom Devices”.

Include Table 10-7 “General Anatomy Optional Macro Attributes”

Defined CID for the Anatomic Region Sequence is CID 4030 “CT, MR and PET Anatomy Imaged”.

Include Table 10-25 “Optional View and Slice Progression Direction Macro Attributes”

Calcium Scoring Mass Factor Patient

(0018,9351)

3

The calibration factor for the calcium mass score. These factors incorporate the effects of

See Section C.8.2.1.1.7.

Calcium Scoring Mass Factor Device

(0018,9352)

3

The calibration factors for the calcium mass score of the device. These factors incorporate the effects of

This a multi-value attribute, the first value specifies the mass factor for a small patient size, the second value for a medium patient size and the third value for a large patient size.

See Section C.8.2.1.1.7.

Energy Weighting Factor

(0018,9353)

1C

The weighting factor of the data from the primary source in a multiple energy composition image. This factor incorporates the effects of

Required if one Derivation Code Sequence (0008,9215) Item value is (113097, DCM, "Multi-energy proportional weighting"). May be present otherwise.

CT Additional X-Ray Source Sequence

(0018,9360)

3

Contains the attributes describing additional acquisition parameters beyond the primary source in a multiple X-Ray source system or a multi-energy acquisition. The primary X-Ray source is specified in other attributes of this module.

One or more Items are permitted in this Sequence.

>KVP

(0018,0060)

1

Peak kilo voltage output of the X-Ray generator used.

>X-Ray Tube Current in mA

(0018,9330)

1

Nominal X-Ray tube current in milliamperes.

>Data Collection Diameter

(0018,0090)

1

The diameter in mm of the region over which data were collected.

>Focal Spot(s)

(0018,1190)

1

Used nominal size of the focal spot in mm.

>Filter Type

(0018,1160)

1

Type of filter(s) inserted into the X-Ray beam.

>Filter Material

(0018,7050)

1

The X-Ray absorbing material used in the filter.

>Exposure in mAs

(0018,9332)

3

The exposure expressed in milliampere seconds, for example calculated from exposure time and X-Ray tube current.

>Energy Weighting Factor

(0018,9353)

1C

The weighting factor of the data from this additional source in a multiple energy composition image. This factor incorporates the effects of

Required if one Derivation Code Sequence (0008,9215) Item value is (113097, DCM, "Multi-energy proportional weighting"). May be present otherwise.

Isocenter Position

(300A,012C)

3

Isocenter coordinates (x,y,z), in mm. Specifies the location of the machine isocenter in the patient-based coordinate system associated with the Frame of Reference. It allows transformation from the equipment-based coordinate system to the patient-based coordinate system.

Include Table 10-27 “RT Equipment Correlation Macro Attributes Description”