Scrubbing PatientAge header over a certain value

[dh92...@gmail.com]

HIPPA standards for de-identification require that patient ages over a certain value are modified:
https://www.hhs.gov/hipaa/for-professionals/privacy/special-topics/de-identification/index.html#dates

Is there a way to achieve this in CTP? We have a set of studies we are de-identifying and want to keep the patient age.

I've looked here (http://mircwiki.rsna.org/index.php?title=The_MIRC_DICOM_Anonymizer#Conditional_Functions) but don't see a way to compare values numerically (greater than/less than)
I'm looking for somthing like: @if(@contents(PatientAge), greaterthan, 89) {90} {@contents(PatientAge)}

[John Perry]

I put a new CTP on the RSNA site:

 

    http://mirc.rsna.org/download/CTP-installer.jar

 

This one has a DicomAnonymizer greaterthan conditional function:

 

    http://mircwiki.rsna.org/index.php?title=The_CTP_DICOM_Anonymizer#.40if.28ElementName.2Cgreaterthan.2Cvalue.29

 

By the way, you can do it without the new function using a regex conditional, like this:

 

@if(PatientAge,matches,"0*((9[0-9])|(1[0-9][0-9]))Y?"){90}{@keep()}

 

I don't guarantee that it works properly in any but the latest CTP version; in testing, I found an error in the way it was handling parentheses inside a function argument. It is fixed in the new version.

 

JP

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[dh92...@gmail.com]

Awesome thanks! It's working great.

Here's the full conditional:
@if(PatientAge, greaterthan, 89) {090Y} {@contents(PatientAge)}

On Monday, May 22, 2017 at 1:14:30 PM UTC-4, John Perry wrote:

I put a new CTP on the RSNA site:

 

    http://mirc.rsna.org/download/CTP-installer.jar

 

This one has a DicomAnonymizer greaterthan conditional function:

 

    http://mircwiki.rsna.org/index.php?title=The_CTP_DICOM_Anonymizer#.40if.28ElementName.2Cgreaterthan.2Cvalue.29

 

By the way, you can do it without the new function using a regex conditional, like this:

 

@if(PatientAge,matches,"0*((9[0-9])|(1[0-9][0-9]))Y?"){90}{@keep()}

 

I don't guarantee that it works properly in any but the latest CTP version; in testing, I found an error in the way it was handling parentheses inside a function argument. It is fixed in the new version.

 

JP

 

From: dh92...@gmail.com

Sent: Monday, May 22, 2017 9:57 AM

To: RSNA MIRC CTP/TFS User Group

Subject: [MIRC CTP/TFS User Group] Scrubbing PatientAge header over a certain value

 

HIPPA standards for de-identification require that patient ages over a certain value are modified:
https://www.hhs.gov/hipaa/for-professionals/privacy/special-topics/de-identification/index.html#dates

Is there a way to achieve this in CTP? We have a set of studies we are de-identifying and want to keep the patient age.

I've looked here (http://mircwiki.rsna.org/index.php?title=The_MIRC_DICOM_Anonymizer#Conditional_Functions) but don't see a way to compare values numerically (greater than/less than)
I'm looking for somthing like: @if(@contents(PatientAge), greaterthan, 89) {90} {@contents(PatientAge)}

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[John Perry]

If you are processing the element that you are testing, then you can use the this keyword and the keep function:

 

@if(this, greaterthan, 89) {090Y} {@keep()}

 

Using this is slightly faster than the lookup of the element name.

 

@keep() is faster than the contents lookup since it doesn't do anything.

 

Of course, if you are using the script to create contents for another element, then your script is correct, except that I would precede it with a call to the always function, to guarantee that the script is always executed, even when the target element is missing from the object:

@always()@if(PatientAge, greaterthan, 89) {090Y} {@contents(PatientAge)}

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