Материал: part03

C.8.8.30.1 Brachy Task Sequence​

The Brachy Task Sequence (0074,1401) contains instructions for the delivery of a single treatment session. A treatment session is​ the time that the patient is connected to the treatment delivery system. During a treatment session, one fraction of the referenced​ plan is delivered. If the value of Brachy Treatment Type (300A,0202) in the reference RT Plan is HDR, the entire fraction is delivered​ at one time. If the value is PDR, the fraction is divided into a number of pulses which are delivered periodically during the treatment​ session.​

The Application Setup groups together the channels to be delivered. The task Sequence can also contain the delivery order of the​ channels. The Omitted Application Setup Sequence (0074,140E) contains the channels to skip in the case of continuation of an inter-​ rupted treatment.​

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Fraction

Figure C.8.8.30-2. Relation of the Fraction, Pulse and Channels within the RT Brachy Task Sequence​

The following scenarios demonstrate the usage of the RT Brachy Application Setup Delivery Instruction Module for the Treatment​ Management System (TMS) to instruct the Treatment Delivery System (TDS) to initiate brachytherapy treatment and continue an in-​ terrupted delivery.​

C.8.8.30.1.1 Usage Scenario 1: HDR Treatment, Interruption Skipping Remainder of the Interrupted Delivery​

Brachytherapy plan overview:​

Plan1, HDR, 2 fractions;​

Channel1, two dwell positions, 10 sec + 10 sec​

Channel2, two dwell positions, 10 sec + 10 sec​

Treatment session 1:​

Treatment Management System (TMS):​

Requests the delivery of the first fraction of the plan:​

RT Brachy Application Setup Delivery Instruction:​

Referenced RT Plan Sequence (300C,0002) = UID of "Plan1"​

Referenced Fraction Group Number (300C,0022) = 1​

Current Fraction Number (3008,0022) = 1​

Brachy Task Sequence (0074,1401):​

Treatment Delivery Type (300A,00CE) = TREATMENT​

Referenced Brachy Application Setup Number (300C,000C) = 1​

Treatment Delivery System (TDS):​

Delivers the first fraction and returns a RT Brachy Treatment Record that describes interruption at channel 2 after 9 seconds of​ the second dwell position is being delivered.​

Treatment session 2:​

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It has been decided to proceed to fraction 2 without delivering the remainder of fraction 1. This is not a continuation case.​ Treatment Management System (TMS):​

Requests the delivery of the second fraction of the plan:​

RT Brachy Application Setup Delivery Instruction:​

Referenced RT Plan Sequence (300C,0002) = UID of "Plan1"​

Referenced Fraction Group Number (300C,0022) = 1​

Current Fraction Number (3008,0022) = 2​

Brachy Task Sequence (0074,1401):​

Treatment Delivery Type (300A,00CE) = TREATMENT​

Referenced Brachy Application Setup Number (300C,000C) = 1​

Treatment Delivery System (TDS) :​

Delivers the second fraction and returns a RT Brachy Treatment Record that describes a complete delivery of that fraction.​

C.8.8.30.1.2 Usage Scenario 2: PDR Treatment, Interruption and Continuation​

Brachytherapy plan overview:​

Plan2, PDR, 10 pulses;​

Channel1, two dwell positions, 50 sec + 50 sec​

Channel2, two dwell positions, 50 sec + 50 sec​

Treatment Session 1​

Treatment Management System (TMS):​

Requests the delivery of the first fraction of the plan:​

RT Brachy Application Setup Delivery Instructions:​

Referenced RT Plan Sequence (300C,0002) = UID of "Plan2"​

Referenced Fraction Group Number (300C,0022) = 1​

Current Fraction Number (3008,0022) = 1​

Brachy Task Sequence (0074,1401):​

Treatment Delivery Type (300A,00CE) = TREATMENT​

Referenced Brachy Application Setup Number (300C,000C) = 1​

Treatment Delivery System (TDS) :​

Delivers the first fraction and returns a RT Brachy Treatment Record that that describes interruption at pulse 5 of the first fraction​ at channel 2, after 25 seconds of the first dwell position was delivered. Total Reference Air Kerma Delivered was 100.​

Treatment Session 2​

It has been decided to proceed to fraction 2 to deliver the remainder of the interrupted plan as instructed by the following task​ transmitted inside the delivery instruction:​

The remainder is defined as to skip 25 sec of the first dwell position of channel 2 and continue with the second dwell position.​

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Treatment Management System (TMS):​

Requests the continuation of the delivery of the first fraction of the plan:​

Referenced RT Plan Sequence (300C,0002) = UID of "Plan2"​

Referenced Fraction Group Number (300C,0022) = 1​

Current Fraction Number (3008,0022) = 1​

Continuation Pulse Number (0074,1404) = 5​

Brachy Task Sequence (0074,1401):​

Treatment Delivery Type (300A,00CE) = CONTINUATION​

Continuation Start Total Reference Air Kerma (0074,1402) = 100​

Continuation End Total Reference Air Kerma (0074,1403) = 1000​

Referenced Brachy Application Setup Number (300C,000C) = 1​

Channel Delivery Order Sequence (0074,1405):​

Referenced Channel Number (0074,1406) = 2​

Channel Delivery Order Index (0074,140C) = 1​

Channel Delivery Continuation Sequence (0074,140D):​

Referenced Channel Number (0074,1406) =2​

Start Cumulative Time Weight (0074,1407) = 50​

End Cumulative Time Weight (0074,1408) = 100​

Omitted Application Setup Sequence (0074,140E):​

Referenced Brachy Application Setup Number (300C,000C) = 1​

Omitted Channel Sequence (0074,1409):​

Referenced Channel Number (0074,1406) = 1​

Reason for Channel Omission (0074,140A) = ALREADY_TREATED​

Treatment Delivery System (TDS):​

Delivers the first fraction and returns RT Brachy Treatment Record that describes that the treatment first fraction was continued​ and the reminder was delivered fully (including the rest of the pulses from 6-10).​

C.8.8.30.2 Treatment Delivery Type​

For RT Brachy Application Setup Delivery Instructions with a Treatment Delivery Type (300A,00CE) of CONTINUATION in an RT​ Plan with a Treatment Type (300A,0202) of PDR, instructions in the Task Sequence apply only to the continuation pulse. The pulses​ following the continuation pulse will be fully delivered.​

C.8.8.30.3 Current Fraction Number​

For RT Brachy Application Setup Delivery Instruction of Treatment Delivery Type (300A,00CE) of CONTINUATION, the Current​ Fraction Number (3008,0022) is that of the fraction to be completed.​

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C.8.8.30.4 Current Pulse Number​

For RT Brachy Application Setup Delivery Instruction with a Treatment Delivery Type (300A,00CE) of CONTINUATION and the​ Treatment Type (300A,0202) of PDR of the Referenced RT Plan, the Continuation Pulse Number (0074,1404) is that of the original​ pulse to be completed by the current application setup.​

C.8.9 PET Information Module Definitions​

ThisSectiondescribesPositronEmissionTomographySeriesandImageModules.TheseModulescontainAttributesthatarespecific​ to Positron Emission Tomography images.​

C.8.9.1 PET Series Module​

Table C.8-60 contains IOD Attributes that describe a PET Series.​

Table C.8-60. PET Series Module Attributes​

Enumerated Values:​

EMISSION​

TRANSMISSION​

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