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Obtaining Time Info from Modality System
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Sri
Apr 5, 2012, 1:30:39 PM4/5/12
to
Is there way to obtain time information of the Modality device?
It's important that hospital medical systems (Modality, RIS, other
medical devices) needs to be in synch on time & time-zones in order to
interoperate well, however practically, this does not happen.
As I understand there is NTP protocol which explicitly addresses this
issue however practically not all the vendors (especially, modality
vendors) implement them on hospital sites - this leads to incorrect
time between the modality and RIS/HIS or other medical device systems,
especially during & after DST (Day light Savings time).
I was wondering if there is any direct/indirect methods to obtain time
information other than ICMP? ICMP is popular however there are some
vendors who do not support or simply block it - as a result there is
no way to automatically obtain this information.
Why don't we include as part of DICOM Echo-Request/Response?
Sridhar
It's important that hospital medical systems (Modality, RIS, other
medical devices) needs to be in synch on time & time-zones in order to
interoperate well, however practically, this does not happen.
As I understand there is NTP protocol which explicitly addresses this
issue however practically not all the vendors (especially, modality
vendors) implement them on hospital sites - this leads to incorrect
time between the modality and RIS/HIS or other medical device systems,
especially during & after DST (Day light Savings time).
I was wondering if there is any direct/indirect methods to obtain time
information other than ICMP? ICMP is popular however there are some
vendors who do not support or simply block it - as a result there is
no way to automatically obtain this information.
Why don't we include as part of DICOM Echo-Request/Response?
Sridhar
David Clunie
Apr 5, 2012, 8:13:02 PM4/5/12
to
Hi Sri
The IHE Consistent Time protocol (which requires NTP or SNTP)
is very widely available on acquisition modalities, and even
if the vendor does not choose to claim credit for it in their
integration statement, chances are it can be easily turned
on using the basic operating system facilities of Windows
or Linux or whatever.
It may be that sites have simply not chosen to configure it
(or have their vendor field engineer do so).
I don't see the need to invent yet another mechanism to deal
with this.
Consistent time ZONE information is a whole other can of worms,
of course, especially when information is recorded in the
DICOM objects without any explicit time zone information
(or is not explicitly in UTC). This is really an implementation
limitation rather than a lack of a standard mechanism, and
leaves one wondering what the local time zone actually is
(and also will not be solved by inventing yet another mechanism
for implementers to ignore).
The operating system should deal with daylight savings transitions
automatically, shouldn't it?
David
On 4/5/12 1:30 PM, Sri wrote:
> Is there way to obtain time information of the Modality device?
>
> It's important that hospital medical systems (Modality, RIS, other
> medical devices) needs to be in synch on time& time-zones in order to
The IHE Consistent Time protocol (which requires NTP or SNTP)
is very widely available on acquisition modalities, and even
if the vendor does not choose to claim credit for it in their
integration statement, chances are it can be easily turned
on using the basic operating system facilities of Windows
or Linux or whatever.
It may be that sites have simply not chosen to configure it
(or have their vendor field engineer do so).
I don't see the need to invent yet another mechanism to deal
with this.
Consistent time ZONE information is a whole other can of worms,
of course, especially when information is recorded in the
DICOM objects without any explicit time zone information
(or is not explicitly in UTC). This is really an implementation
limitation rather than a lack of a standard mechanism, and
leaves one wondering what the local time zone actually is
(and also will not be solved by inventing yet another mechanism
for implementers to ignore).
The operating system should deal with daylight savings transitions
automatically, shouldn't it?
David
On 4/5/12 1:30 PM, Sri wrote:
> Is there way to obtain time information of the Modality device?
>
> It's important that hospital medical systems (Modality, RIS, other
> interoperate well, however practically, this does not happen.
>
> As I understand there is NTP protocol which explicitly addresses this
> issue however practically not all the vendors (especially, modality
> vendors) implement them on hospital sites - this leads to incorrect
> time between the modality and RIS/HIS or other medical device systems,
> especially during& after DST (Day light Savings time).
>
> As I understand there is NTP protocol which explicitly addresses this
> issue however practically not all the vendors (especially, modality
> vendors) implement them on hospital sites - this leads to incorrect
> time between the modality and RIS/HIS or other medical device systems,
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