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devel / comp.protocols.dicom / Re: Extração de dados de dose DICOM

SubjectAuthor
* Extração de dados de dose DICOMLetícia Bacelar
`* Re: Extração de dados de dose DICOMMarkus Sabin
 `- Re: Extração de dados de dose DICOMDavid Clunie

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Extração de dados de dose DICOM

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Subject: Extração_de_dados_de_dose_DICOM
From: fiuzabacelar@gmail.com (Letícia Bacelar)
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 by: Letícia Bacelar - Thu, 29 Jun 2023 14:25 UTC

Prezados, bom dia
Estamos desenvolvendo um estudo e precisamos extrair dados de CTDIvol e DLP de exames de TC por meio do cabeçalho DICOM, uma vez que não acessamos as imagens dos exames, apenas os relatórios de dose.
Entretanto, observamos que nem todos os fabricantes de tomógrafo informam claramente, por meio da TAG DICOM, os valores de CTDIvol e DLP de cada exame no relatório de dose. Sendo assim, poderiam nos informar se há algum caminho padronizado via DICOM para obter de forma segura essas informações?

Poderiam nos ajudar

att, Letícia

Re: Extração de dados de dose DICOM

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Subject: Re:_Extração_de_dados_de_dose_DICOM
From: markussabin@gmail.com (Markus Sabin)
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 by: Markus Sabin - Tue, 11 Jul 2023 06:16 UTC

Hello Letícia,

there has been quite a transition in the way to store dose information in DICOM during the decades of its development.

Nowadays, dosis information *should* be found in a Radiation Dose SR (RDSR) object which is stored with the images.
Formerly, the MPPS service was intended to include dose information. Since MPPS could be considered as the "counterpart to worklist", this information may not be stored in the PACS but in the RIS.
Finally, I am aware of CT Scanners (Siemens) which store dose information in a rasterized image (if I remember correctly, referred to as "patient protocol".

So it may depend on the manufacturer, model and software version of different scanners where you can obtain this information.

Hope this helps

Markus

Letícia Bacelar schrieb am Donnerstag, 29. Juni 2023 um 16:26:00 UTC+2:
> Prezados, bom dia
> Estamos desenvolvendo um estudo e precisamos extrair dados de CTDIvol e DLP de exames de TC por meio do cabeçalho DICOM, uma vez que não acessamos as imagens dos exames, apenas os relatórios de dose.
> Entretanto, observamos que nem todos os fabricantes de tomógrafo informam claramente, por meio da TAG DICOM, os valores de CTDIvol e DLP de cada exame no relatório de dose. Sendo assim, poderiam nos informar se há algum caminho padronizado via DICOM para obter de forma segura essas informações?
>
> Poderiam nos ajudar
>
> att, Letícia

Re: Extração de dados de dose DICOM

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Subject: Re:_Extração_de_dados_de_dose_DICOM
From: dclunie@dclunie.com (David Clunie)
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 by: David Clunie - Tue, 11 Jul 2023 11:16 UTC

See the standard that describes the RDSR:

https://dicom.nema.org/medical/dicom/current/output/chtml/part16/sect_CTRadiationDoseSRIODTemplates.html
https://www.dicomstandard.org/using/radiation/

A bit out of date, but still relevant:

https://www.dclunie.com/papers/JSRT_2015_DoseEncodingStandards_Clunie.pdf
https://sites.google.com/site/medimgraddoseinformatics/

Letícia Bacelar schrieb am Donnerstag, 29. Juni 2023 um 16:26:00 UTC+2:
>We are developing a study and need to extract CTDIvol and DLP data from CT scans through the DICOM header, as we do not access the scan images, only the dose reports. However, we observed that not all tomography manufacturers clearly inform, through the DICOM TAG, the CTDIvol and DLP values of each exam in the dose report. So, could you tell us if there is any standardized way via DICOM to securely obtain this information?

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