<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV>Some comments before the Tcon:</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>I will try not to repeat the things that have already been said:</DIV><A href="http://public.kitware.com/IGSTKWIKI/index.php/Surgical_coordinate_changes">http://public.kitware.com/IGSTKWIKI/index.php/Surgical_coordinate_changes</A><DIV>http://public.kitware.com/IGSTKWIKI/index.php/Talk:Surgical_coordinate_changes</DIV><DIV><BR><DIV><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; ">- Coordinate systems, transformations and spatial objects (as well as tracker and trackerTool) should be treated as separate concept whenever possible.</SPAN></SPAN></SPAN></DIV><DIV><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; ">- Names known from IGS should be used whenever possible</SPAN></SPAN></SPAN></DIV><DIV>- To keep it simple (and familiar) (at least for the user) should be a very important design criteria.</DIV><DIV>- The design should be based on how it's supposed to be used in most cases (95%, default behavior, with enough flexibility to deal with the other cases, not more)</DIV><DIV>- It would be nice to test the proposed framework on a concrete and common scenario (figures and pseudo-code) </DIV><DIV>- What is regarded as World / Global reference coordinate-system change from phase to phase in the surgical workflow: </DIV><DIV>* PreOpRefSys: e.g. the "DICOM" coord. sys. of the "master volume"</DIV><DIV>* IntraOpRefSys: the (Patient)Ref.Frame (a special TrackerTool, most common, default) or the coord. sys. of the Tracker itself (e.g. middle of the camera for optical systems)</DIV><DIV>* (PostOpRefSys: e.g. the "DICOM" coord. sys. of one of the post. op. volumes)</DIV><DIV>- The sub-tree/hierarchy of image date basically moves through these phases (e.i. the world coord. sys. change but the sub-tree remains somewhat similar.</DIV><DIV>- The change from one phase to the next happens as a result of some kind of registration. e.g. Patient registration (from PreOpRefSys to IntraOpRefSys)</DIV><DIV>- Changes (in position) within the image sub tree happens as a result of brain-shift calibration for example.</DIV><DIV>- Well known names for well known procedures should be used: SetCalibration, SetPatientRegistration, etc.</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>- Frank</DIV><DIV> </DIV><DIV><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;"><BR class="khtml-block-placeholder"></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;; color: rgb(105, 105, 105); font-family: Helvetica Neue; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; ">------------------------------</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;; color: rgb(105, 105, 105); font-family: Helvetica Neue; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; ">Frank Lindseth</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;; color: rgb(105, 105, 105); font-family: Helvetica Neue; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; 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Medical Technology</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;; color: rgb(105, 105, 105); font-family: Helvetica Neue; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; ">N-7465 Trondheim, Norway</SPAN></SPAN></SPAN></SPAN></SPAN></SPAN></FONT></DIV><DIV style="margin-top: 0px; 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"><FONT class="Apple-style-span" color="#696969" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px;; color: rgb(105, 105, 105); font-family: Helvetica Neue; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; "><SPAN class="Apple-style-span" style="color: rgb(105, 105, 105); font-family: Helvetica Neue; font-size: 11px; ">E-mail: </SPAN></SPAN></SPAN></FONT><FONT class="Apple-style-span" color="#0020E3" face="Helvetica Neue" size="3"><SPAN class="Apple-style-span" style="font-size: 11px; text-decoration: underline;; color: rgb(0, 32, 227); font-family: Helvetica Neue; -khtml-text-decorations-in-effect: underline; "><SPAN class="Apple-style-span" style="color: rgb(0, 32, 227); font-family: Helvetica Neue; font-size: 11px; -khtml-text-decorations-in-effect: underline; "><SPAN class="Apple-style-span" style="color: rgb(0, 32, 227); font-family: Helvetica Neue; font-size: 11px; -khtml-text-decorations-in-effect: underline; 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