Материал: part03

Скачать

Заказать новую работу

Внимание! Если размещение файла нарушает Ваши авторские права, то обязательно сообщите нам

Page 696​

DICOM PS3.3 2020a - Information Object Definitions​

Note​

It is permissible to generate a vector of the absolute positioner angles in the Positioner Angle Increment Attributes, and set​ the Positioner Primary and Secondary Angle Attributes to value 0.​

C.8.7.5.1.4 Detector Primary and Secondary Angles​

Detector Angles are defined in a fashion similar to the positioner angles, except that the angle of the central X-Ray beam vector is​ relative to the Detector Plane rather than the Patient Plane. The central X-Ray beam vector is defined as the vector from the X-Ray​ source through the isocenter to the detector plane. Zero degree is referenced to the normal to the detector plane pointing away from​ theX-Raysource.TheDetectorAngleAttributesapplytothefirstframeofamulti-frameimage.ThevalidrangeoftheDetectorAngles​ is -90 to + 90 degrees.​

The Primary Axis of rotation is defined along the line in the column direction of the detector plane that intersects the central X-Ray​ beam vector. The Detector Primary Angle is defined in the plane perpendicular to the Primary Axis of rotation at the point where the​ centralX-Raybeamvectorintersectsthedetectorplane,withzerodegreesinthedirectionnormaltothedetectorplaneand-90degrees​ at the left hand side of the image (i.e., toward column 1) and +90 at the right hand side of the image (i.e., toward the highest numbered​ column). The valid range of Primary Detector Angle is -90 to +90 degrees.​

The Secondary Axis is in the detector plane and is perpendicular to the Primary Axis at the intersection of the beam vector with the​ detectorplane(i.e.,itisalongtherowdirection).TheDetectorSecondaryAngleisdefinedintheplaneperpendiculartotheSecondary​ Axis at the point where the central X-Ray beam vector intersects the detector plane, with zero degrees in the direction normal to the​ detector plane. +90 degrees corresponds to the direction toward the top of the image. The Secondary Detector Angle range is -90 to​ + 90 degrees.​

C.8.7.6 XRF Positioner Module​

Table C.8-31. XRF Positioner Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Distance Source to Detector​

(0018,1110)​

3​ Distance in mm from source to detector center.​

 

 

 

Note​

 

 

 

This value is traditionally referred to as Source Image​

 

 

 

Receptor Distance (SID).​

Distance Source to Patient​

(0018,1111)​

3​ Distance in mm from source to center of field of view.​

 

 

 

Note​

 

 

 

This value is traditionally referred to as Source Object​

 

 

 

Distance (SOD).​

Estimated Radiographic​

(0018,1114)​

3​ Ratio of SID (Source Image Receptor Distance) over SOD (Source​

Magnification Factor​

 

 

Object Distance).​

Column Angulation​

(0018,1450)​

3​ Angle of the X-Ray beam in degree relative to an orthogonal axis​

tothedetectorplane.Positivevaluesindicatethatthetiltistowards​ the head of the table.​

Note​

The detector plane is assumed to be parallel to the table​ plane.​

C.8.7.7 X-Ray Tomography Acquisition Module​

ThisModuledescribestheAttributesofaTomographyacquisition(translationofX-Raysourceduringtheacquisitionofasingle-frame​ image).​

- Standard -​

DICOM PS3.3 2020a - Information Object Definitions​ Page 697​

Table C.8-32. X-Ray Tomography Acquisition Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

Tomo Layer Height​

(0018,1460)​

1​ Distance in mm between the table surface and the sharp image​

 

 

 

plane.​

Tomo Angle​

(0018,1470)​

3​ Angle span in degrees of rotation of X-Ray Source during X-Ray​

 

 

 

acquisition.​

Tomo Time​

(0018,1480)​

3​ Time in seconds the source has taken to rotate the Tomo Angle​

 

 

 

during X-Ray acquisition.​

Tomo Type​

(0018,1490)​

3​

Type of tomography.​

 

 

 

Defined Terms:​

 

 

 

LINEAR​

 

 

 

SPIRAL​

 

 

 

POLYCYCLOIDAL​

 

 

 

CIRCULAR​

Tomo Class​

(0018,1491)​

3​

Form of tomography:​

 

 

 

Defined Terms:​

 

 

 

MOTION​

 

 

 

TOMOSYNTHESIS​

Number of Tomosynthesis​

(0018,1495)​

3​ Thenumberofsourceimagesusedtoconstructthistomosynthetic​

Source Images​

 

 

image. Only meaningful if Tomo Class (0018,1491) is​

 

 

 

TOMOSYNTHESIS. These may be listed in Source Image​

 

 

 

Sequence (0008,2112) of the General Image Module.​

C.8.7.8 X-Ray Acquisition Dose Module​

This Module describes the Attributes related to dose delivery from an X-Ray source during the acquisition of an X-Ray image.​

Table C.8-33. X-Ray Acquisition Dose Module Attributes​

Attribute Name​

Tag​

Type​

Attribute Description​

KVP​

(0018,0060)​

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

X-Ray Tube Current​

(0018,1151)​

3​ X-Ray Tube Current in mA.​

X-Ray Tube Current in​

(0018,8151)​

3​ X-Ray Tube Current in µA.​

µA​

 

 

 

Exposure Time​

(0018,1150)​

3​ Duration of X-Ray exposure in msec.​

Exposure Time in µS​

(0018,8150)​

3​ Duration of X-Ray exposure in µsec.​

Exposure​

(0018,1152)​

3​ TheexposureexpressedinmAs,forexamplecalculatedfromExposureTime​

 

 

 

and X-Ray Tube Current.​

Exposure in µAs​

(0018,1153)​

3​ TheexposureexpressedinµAs,forexamplecalculatedfromExposureTime​

 

 

 

and X-Ray Tube Current.​

Distance Source to​

(0018,1110)​

3​ Distance in mm from source to detector center.​

Detector​

 

 

Note​

 

 

 

This value is traditionally referred to as Source Image Receptor​

Distance (SID).​

- Standard -​

Page 698​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Distance Source to​

(0018,1111)​

3​ Distanceinmmfromsourcetothetable,supportorbuckysidethatisclosest​

Patient​

 

 

to the Imaging Subject, as measured along the central ray of the X-Ray​

 

 

 

beam.​

 

 

 

Note​

 

 

 

1.​This definition is less useful in terms of estimating geometric​

 

 

 

magnification than a measurement to a defined point within​

 

 

 

the Imaging Subject, but accounts for what is realistically​

 

 

 

measurable in an automated fashion in a clinical setting.​

 

 

 

2.​This measurement does not take into account any air gap​

 

 

 

between the Imaging Subject and the "front" of the table or​

 

 

 

bucky.​

 

 

 

3.​If the detector is not mounted in a table or bucky, then the​

 

 

 

actual position relative to the patient is implementation or​

 

 

 

operator defined.​

 

 

 

4.​ThisvalueistraditionallyreferredtoasSourceObjectDistance​

 

 

 

(SOD).​

Image and Fluoroscopy​

(0018,115E)​

3​ X-Ray dose, measured in dGy*cm*cm, to which the patient was exposed for​

Area Dose Product​

 

 

the acquisition of this image plus any non-digitally recorded fluoroscopy that​

 

 

 

may have been performed to prepare for the acquisition of this image.​

 

 

 

Note​

 

 

 

1.​The sum of the area dose product of all images of a Series or​

 

 

 

a Study may not result in the total area dose product to which​

 

 

 

the patient was exposed.​

 

 

 

2.​This may be an estimated value based on assumptions about​

 

 

 

the patient's body size and habitus.​

Body Part Thickness​

(0018,11A0)​

3​ The average thickness in mm of the body part examined when compressed,​

 

 

 

if compression has been applied during exposure.​

Relative X-Ray​

(0018,1405)​

3​ Indication of the applied dose, in manufacturer specific units.​

Exposure​

 

 

Note​

 

 

 

 

 

 

1.​This value is intended to provide a single location where​

 

 

 

manufacturer specific information can be found for annotation​

 

 

 

on a display or film, that has meaning to a knowledgeable​

 

 

 

observer.​

 

 

 

2.​This may be a calculated or measured value. Examples are​

 

 

 

the detector entrance dose (KB), the CR sensitivity value (S),​

 

 

 

or the logarithmic median (lgM).​

 

 

 

3.​DICOMspecifiesStandardAttributesinTable10-23'Exposure​

 

 

 

Index Macro', which are recommended.​

Entrance Dose​

(0040,0302)​

3​ Average entrance dose value measured in dGy at the surface of the patient​

during the acquisition of this image.​ Note​

This may be an estimated value based on assumptions about the​ patient's body size and habitus.​

- Standard -​

 

DICOM PS3.3 2020a - Information Object Definitions​

Page 699​

Attribute Name​

Tag​

Type​

Attribute Description​

 

Entrance Dose in mGy​

(0040,8302)​

3​ Average entrance dose value measured in mGy at the surface of the patient​

 

 

during the acquisition of this image.​

 

 

 

Note​

 

 

 

This may be an estimated value based on assumptions about the​

 

 

patient's body size and habitus.​

 

Entrance Dose​

(0040,8303)​

3​ Describes what type of dose is represented by the values of Entrance Dose​

Derivation​

 

(0040,0302) and Entrance Dose in mGy (0040,8302).​

 

 

 

Enumerated Values:​

 

 

 

IAK​

Represents air kerma at the entrance surface, no backscatter​

 

 

 

included, no air kerma to tissue dose conversion applied.​

 

 

ESAK​ Represents air kerma at the entrance surface, with backscatter​

 

 

 

included, no air kerma to tissue dose conversion applied.​

 

 

ESDBS​ Represents absorbed dose in tissue at the entrance surface,​

 

 

 

with backscatter included.​

 

 

 

ESDNOBS​Represents absorbed dose in tissue at the entrance surface,​

 

 

 

without backscatter included.​

 

 

 

Only meaningful if Entrance Dose (0040,0302) or Entrance Dose in mGy​

 

 

(0040,8302) is present.​

 

Exposed Area​

(0040,0303)​

3​ Typical dimension of the exposed area at the detector plane. If Rectangular:​

 

 

row dimension followed by column; if Round: diameter. Measured in cm.​

 

 

Note​

 

 

 

1.​The exposed area should be consistent with values specified​

 

 

 

in the X-Ray Collimator Module, if present.​

 

 

 

2.​This may be an estimated value based on assumptions about​

 

 

 

the patient's body size and habitus.​

 

 

 

3.​This Attribute was previously used in the Radiation Dose​

 

 

 

Modulewithunitsinmm.Thisusehasbeenretired.SeePS3.3​

 

 

 

2017c.​

 

Distance Source to​

(0040,0306)​

3​ Distance in mm from the source to the surface of the patient closest to the​

Entrance​

 

source during the acquisition of this image.​

 

 

 

Note​

 

 

 

This may be an estimated value based on assumptions about the​

 

 

patient's body size and habitus.​

 

CommentsonRadiation​

(0040,0310)​

3​ User-defined comments on any special conditions related to radiation dose​

Dose​

 

encountered during the acquisition of this image.​

 

X-Ray Output​

(0040,0312)​

3​ The X-Ray output at the patient entrance surface and kVp used to acquire​

the image, measured in mGy/mAs.​ Note​

This value may be a calibrated value rather than measured during​ the exposure.​

- Standard -​

Page 700​

DICOM PS3.3 2020a - Information Object Definitions​

Attribute Name​

Tag​

Type​

Attribute Description​

Half Value Layer​

(0040,0314)​

3​

The thickness of Aluminum in mm required to reduce the X-Ray Output​

 

 

 

(0040,0312) by a factor of two.​

 

 

 

Note​

 

 

 

This value may be a calibrated value rather than measured during​

 

 

 

the exposure.​

Organ Dose​

(0040,0316)​

3​

Average organ dose value measured in dGy during the acquisition of this​

 

 

 

image.​

 

 

 

Note​

 

 

 

This may be an estimated value.​

Organ Exposed​

(0040,0318)​

3​

Organ to which Organ Dose (0040,0316) applies.​

Defined Terms:​

BREAST​

GONADS​

BONE​

MARROW​

FETUS​

LENS​

Note​

The anatomic regions described by these terms are those that are​ particularly radiosensitive and for which it is conventional to obtain​ organ specific dose parameters.​

Anode Target Material​ (0018,1191)​

3​ The primary material in the anode of the X-Ray source.​

Defined Terms:​

TUNGSTEN​

MOLYBDENUM​

RHODIUM​

Include Table C.8-35a “X-Ray Filtration Macro​

Attributes”​

Rectification Type​

(0018,1156)​

3​ Type of rectification used in the X-Ray generator.​

Defined Terms:​

SINGLE PHASE​

THREE PHASE​

CONSTPOTENTIAL​

Include Table 10-23 “Exposure Index Macro Attributes”​

C.8.7.9 X-Ray Generation Module​

This Module describes the Attributes related to generation of X-Rays during the acquisition of an X-Ray image.​

Table C.8-34. X-Ray Generation Module Attributes​

Attribute Name​

Tag​

Type​ Attribute Description​

KVP​

(0018,0060)​

3​

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

X-Ray Tube Current​

(0018,1151)​

3​

X-Ray Tube Current in mA.​

- Standard -​

Смотрите также:

«ДОХОДЫ, РАСХОДЫ И ПРИБЫЛЬ КОММЕРЧЕСКОГО БАНКА.»
«ДОХОДЫ, РАСХОДЫ И ПРИБЫЛЬ КОММЕРЧЕСКОГО БАНКА.»
Значение, сущность и содержание социально — педагогической деятельности в организации для детей-сирот и детей, оставшихся без попечения родителей
__RGR2
__RGR2
_11_А. Франс для эл версии
_индив анализ данных
- Интерфейс 485 и оптопорт 11
:Конвергентный подход к проектированию дополнительных общеобразовательных общеразвивающих программ