# Latest **URL:** https://forum.sgrt.org/latest.md [Latest](https://forum.sgrt.org/latest.md) · [Categories](https://forum.sgrt.org/categories.md) · [Tags](https://forum.sgrt.org/tags.md) --- ## [Welcome to The SGRT Community! 👋](https://forum.sgrt.org/t/welcome-to-the-sgrt-community/5)
**Author:** [@system](https://forum.sgrt.org/u/system)\ **Replies:** 0\ **Last updated:** [January 28, 2025, 2:49pm UTC](https://forum.sgrt.org/t/welcome-to-the-sgrt-community/5 "2025-01-28T14:49:05Z")
We are so glad you joined us. The SGRT Community The SGRT Community mission is to facilitate a radiation oncology peer-to-peer environment of clinical professionals working together to adopt and promote best practice o… --- ## [3 point open face masks & shoulder positioning](https://forum.sgrt.org/t/3-point-open-face-masks-shoulder-positioning/485)
**Author:** [@Charlotte\_McAlinden](https://forum.sgrt.org/u/Charlotte_McAlinden)\ **Replies:** 3\ **Last updated:** [October 15, 2026, 6:51am UTC](https://forum.sgrt.org/t/3-point-open-face-masks-shoulder-positioning/485 "2026-10-15T06:51:00Z")
We have been trialling 5 point open face masks for head and necks as we have traditionally used 5 point closed. Our audit results have shown to be comparable, however we continue to have issues with shoulder position for… --- ## [Abdomen ROI's including compression belt](https://forum.sgrt.org/t/abdomen-rois-including-compression-belt/305)
**Author:** [@Laressa\_Priddy\_1](https://forum.sgrt.org/u/Laressa_Priddy_1)\ **Replies:** 6\ **Last updated:** [September 18, 2026, 8:16am UTC](https://forum.sgrt.org/t/abdomen-rois-including-compression-belt/305 "2026-09-18T08:16:41Z")
We are about to move towards using SGRT for all our SABR abdomen patients. In terms of ROI what have people found to be best? Also, some patients will be in compression with the belt, are there any ROI’s which work best … --- ## [OIS reporting in mosaiq](https://forum.sgrt.org/t/ois-reporting-in-mosaiq/472)
**Author:** [@Steven\_de\_Boer](https://forum.sgrt.org/u/Steven_de_Boer)\ **Replies:** 3\ **Last updated:** [September 16, 2026, 1:49pm UTC](https://forum.sgrt.org/t/ois-reporting-in-mosaiq/472 "2026-09-16T13:49:12Z")
Hello, I would love to hear from someone that has a sucsessful connection between AlignRT and mosaiq for the OIS reporting module. We are having difficuly and was wondering specifically what you needed to do in mosaiq … --- ## [SGRT interruptions affecting EPID analysis(radcalc)](https://forum.sgrt.org/t/sgrt-interruptions-affecting-epid-analysis-radcalc/467)
**Author:** [@balaa95](https://forum.sgrt.org/u/balaa95)\ **Replies:** 4\ **Last updated:** [September 4, 2026, 12:36pm UTC](https://forum.sgrt.org/t/sgrt-interruptions-affecting-epid-analysis-radcalc/467 "2026-09-04T12:36:21Z")
Hi, We have been doing EPID in-vivo measurements for the prostate first fraction at our centre. But now that we’re using SGRT, any time the beam gets interrupted because a delta goes out of tolerance, it splits the log … --- ## [Align cameras regularly reinitializing](https://forum.sgrt.org/t/align-cameras-regularly-reinitializing/470)
**Author:** [@Steven\_de\_Boer](https://forum.sgrt.org/u/Steven_de_Boer)\ **Replies:** 1\ **Last updated:** [September 3, 2026, 7:03am UTC](https://forum.sgrt.org/t/align-cameras-regularly-reinitializing/470 "2026-09-03T07:03:17Z")
I was wondering if anyone was experencing an issue where the cameras reintiailize several times per day and what potential fix or trouble shooting you might suggest? It may be that the cameras are changing the usb com p… --- ## [New SGRT superuser group staff](https://forum.sgrt.org/t/new-sgrt-superuser-group-staff/468)
**Author:** [@GeorgeG](https://forum.sgrt.org/u/GeorgeG)\ **Replies:** 0\ **Last updated:** [August 26, 2026, 9:22am UTC](https://forum.sgrt.org/t/new-sgrt-superuser-group-staff/468 "2026-08-26T09:22:48Z")
Hi all. Would be interested to hear what you do when bringing more Radiographers into the superuser group in your department (if you have one). Our current group is 5 Radiographers strong and we would like to bring in 2… --- ## [DIBH technique translating into other languages](https://forum.sgrt.org/t/dibh-technique-translating-into-other-languages/189)
**Author:** [@nicola\_mullins](https://forum.sgrt.org/u/nicola_mullins)\ **Replies:** 9\ **Last updated:** [August 14, 2026, 7:26am UTC](https://forum.sgrt.org/t/dibh-technique-translating-into-other-languages/189 "2026-08-14T07:26:10Z")
Hi all Apologies if this has been asked before. We have a set up a DIBH service here in the UK that relies on coaching the patient into the treatment position. However, we have patients that don’t speak English that we … --- ## [AlignRT software upgrade from V6.3 to V8](https://forum.sgrt.org/t/alignrt-software-upgrade-from-v6-3-to-v8/438)
**Author:** [@balaa95](https://forum.sgrt.org/u/balaa95)\ **Replies:** 1\ **Last updated:** [July 29, 2026, 9:24am UTC](https://forum.sgrt.org/t/alignrt-software-upgrade-from-v6-3-to-v8/438 "2026-07-29T09:24:25Z")
HI All, We use AlignRT V6.3, and we are planning our first upgrade to V8. We are an Elekta clinic with a target go-live date in a month. While our commissioning is complete, we want to know if a one-month timeline is r… --- ## [Elekta Versa Linac - moving couch mid beam](https://forum.sgrt.org/t/elekta-versa-linac-moving-couch-mid-beam/439)
**Author:** [@Nick](https://forum.sgrt.org/u/Nick)\ **Replies:** 1\ **Last updated:** [July 16, 2026, 1:09pm UTC](https://forum.sgrt.org/t/elekta-versa-linac-moving-couch-mid-beam/439 "2026-07-16T13:09:55Z")
Our testing suggests that in the event that we needed to move the bed mid-beam (deltas out of tolerance) using send to couch we’d have to terminate the beam & re-set motors in the room which would be no quicker than manu… --- ## [Systematic Error Correction/Trend Analysis - reference surface capture](https://forum.sgrt.org/t/systematic-error-correction-trend-analysis-reference-surface-capture/447)
**Author:** [@Nick](https://forum.sgrt.org/u/Nick)\ **Replies:** 1\ **Last updated:** [July 9, 2026, 10:07am UTC](https://forum.sgrt.org/t/systematic-error-correction-trend-analysis-reference-surface-capture/447 "2026-07-09T10:07:06Z")
We currently use 3-day Systematic Error Correction/Trend Analysis due to the need to be able to decide which patients could be treated without imaging in the event of one of our two Elekta linacs going down. Do any depa… --- ## [Systematic Error Correction/Trend Analysis - Reference Surface Capture](https://forum.sgrt.org/t/systematic-error-correction-trend-analysis-reference-surface-capture/441)
**Author:** [@Nick](https://forum.sgrt.org/u/Nick)\ **Replies:** 1\ **Last updated:** [July 7, 2026, 8:14am UTC](https://forum.sgrt.org/t/systematic-error-correction-trend-analysis-reference-surface-capture/441 "2026-07-07T08:14:37Z")
We currently use 3-day Systematic Error Correction/Trend Analysis due to the need to be able to decide which patients could be treated without imaging in the event of one of our two Elekta linacs going down. Do any depa… --- ## [RTD's tolerance for moving back to Reference Capture without further CBCT](https://forum.sgrt.org/t/rtds-tolerance-for-moving-back-to-reference-capture-without-further-cbct/440)
**Author:** [@Nick](https://forum.sgrt.org/u/Nick)\ **Replies:** 1\ **Last updated:** [July 7, 2026, 7:57am UTC](https://forum.sgrt.org/t/rtds-tolerance-for-moving-back-to-reference-capture-without-further-cbct/440 "2026-07-07T07:57:21Z")
What tolerance do you have for moving a patient (pelvis) back to the reference capture taken after the initial CBCT, without needing a further CBCT to confirm? If your tolerance is over 0.5cm what’s your evidence to con… --- ## [How to incoporate couch walkout and gantry occulusine?](https://forum.sgrt.org/t/how-to-incoporate-couch-walkout-and-gantry-occulusine/443)
**Author:** [@Menna](https://forum.sgrt.org/u/Menna)\ **Replies:** 1\ **Last updated:** [July 1, 2026, 1:56pm UTC](https://forum.sgrt.org/t/how-to-incoporate-couch-walkout-and-gantry-occulusine/443 "2026-07-01T13:56:35Z")
A follow-up question regarding SGRTuesdays June 2026: How to incoporate couch walkout and gantry occulusine? -- Asad Yousuf --- ## [Troubleshooting flowchart](https://forum.sgrt.org/t/troubleshooting-flowchart/435)
**Author:** [@MattAllan](https://forum.sgrt.org/u/MattAllan)\ **Replies:** 1\ **Last updated:** [June 25, 2026, 6:55am UTC](https://forum.sgrt.org/t/troubleshooting-flowchart/435 "2026-06-25T06:55:49Z")
Hello, We are close to setting up our SGRT service, does anyone have a flowchart for online decision making/problem solving they would be willing to share please? --- ## [Post ACO QA/procedures](https://forum.sgrt.org/t/post-aco-qa-procedures/328)
**Author:** [@balaa95](https://forum.sgrt.org/u/balaa95)\ **Replies:** 3\ **Last updated:** [June 17, 2026, 2:03pm UTC](https://forum.sgrt.org/t/post-aco-qa-procedures/328 "2026-06-17T14:03:22Z")
Hi All, Could you guys please share the QA’s/procedures that you perform following an ACO calibration? Thanks, Ash --- ## [Lung SABR Immobilisation](https://forum.sgrt.org/t/lung-sabr-immobilisation/402)
**Author:** [@laurenjchamberlain](https://forum.sgrt.org/u/laurenjchamberlain)\ **Replies:** 1\ **Last updated:** [May 17, 2026, 11:11pm UTC](https://forum.sgrt.org/t/lung-sabr-immobilisation/402 "2026-05-17T23:11:02Z")
I’m currently reviewing our immobilisation practices in the era of SGRT, particularly for lung SABR patients. I’m really interested to hear what your centre is currently using for lung SABR (e.g. wingboard only, type of… --- ## [Changing the ROI during a breathhold](https://forum.sgrt.org/t/changing-the-roi-during-a-breathhold/388)
**Author:** [@meral\_reyhan](https://forum.sgrt.org/u/meral_reyhan)\ **Replies:** 1\ **Last updated:** [April 22, 2026, 10:32am UTC](https://forum.sgrt.org/t/changing-the-roi-during-a-breathhold/388 "2026-04-22T10:32:23Z")
Should you change an ROI during a fraction due to camera blockage, without taking imaging to confirm alignment. Once you have an ROI specified and that is tied to an image alignment, i.e., captured after shifts are made … --- ## [Swallowing movement during larynx radiotherapy](https://forum.sgrt.org/t/swallowing-movement-during-larynx-radiotherapy/362)
**Author:** [@marko\_laaksomaa](https://forum.sgrt.org/u/marko_laaksomaa)\ **Replies:** 4\ **Last updated:** [April 9, 2026, 6:17pm UTC](https://forum.sgrt.org/t/swallowing-movement-during-larynx-radiotherapy/362 "2026-04-09T18:17:50Z")
Hello all I would like to know that how well and widely the issue Surface guided motion management in glottic larynx stereotactic body radiation therapy - ScienceDirect has been put into practice and how is it working? … --- ## [Breast CBCT & DIBH](https://forum.sgrt.org/t/breast-cbct-dibh/211)
**Author:** [@Charlotte\_McAlinden](https://forum.sgrt.org/u/Charlotte_McAlinden)\ **Replies:** 11\ **Last updated:** [March 13, 2026, 4:07pm UTC](https://forum.sgrt.org/t/breast-cbct-dibh/211 "2026-03-13T16:07:38Z")
Hi, Is anyone using CBCT imaging for breast DIBH patients? We currently CBCT all breasts and use the RGSC system for DIBH which will automatically beam hold the CBCT if they were to move out of breath hold (we spilt the… --- ## [AlignRT software upgrade to v7.4](https://forum.sgrt.org/t/alignrt-software-upgrade-to-v7-4/351)
**Author:** [@colin\_jennings](https://forum.sgrt.org/u/colin_jennings)\ **Replies:** 2\ **Last updated:** [December 19, 2025, 4:21am UTC](https://forum.sgrt.org/t/alignrt-software-upgrade-to-v7-4/351 "2025-12-19T04:21:58Z")
Hi, we have just upgraded one of our AlignRT systems to v7.4. Because the database is not compatible with v6.3 we have rolled it out using a local server for now while we decide what to do with our current patients on ou… --- ## [SGRT in place of ABC for SABR breath hold](https://forum.sgrt.org/t/sgrt-in-place-of-abc-for-sabr-breath-hold/261)
**Author:** [@Helen\_Sheridan](https://forum.sgrt.org/u/Helen_Sheridan)\ **Replies:** 7\ **Last updated:** [December 2, 2025, 10:56am UTC](https://forum.sgrt.org/t/sgrt-in-place-of-abc-for-sabr-breath-hold/261 "2025-12-02T10:56:12Z")
Hi everyone, We currently use ABC to achieve DIBH for Lung SABR patients and EBH for Abdominal SABR patients. While effective, we’ve found that this method can be intrusive for patients, time-consuming to set up, and co… --- ## [DIBH Protocol/Candidate Criteria](https://forum.sgrt.org/t/dibh-protocol-candidate-criteria/192)
**Author:** [@phillip\_harmer](https://forum.sgrt.org/u/phillip_harmer)\ **Replies:** 2\ **Last updated:** [November 26, 2025, 10:30am UTC](https://forum.sgrt.org/t/dibh-protocol-candidate-criteria/192 "2025-11-26T10:30:34Z")
What criteria does a patient need to meet to be a good DIBH candidate? I understand they would need to be able to repeat the same BH each time but is there a certain amount of chest rise you require? We recently had a be… --- ## [Cimmissioning guideline](https://forum.sgrt.org/t/cimmissioning-guideline/331)
**Author:** [@Marcus\_Lemke](https://forum.sgrt.org/u/Marcus_Lemke)\ **Replies:** 1\ **Last updated:** [November 13, 2025, 9:31am UTC](https://forum.sgrt.org/t/cimmissioning-guideline/331 "2025-11-13T09:31:41Z")
Hi All, is there a commissioning guideline available? Thanks. BR, Marcus --- ## [AignRT v7.4 and Elekta EVO linacs](https://forum.sgrt.org/t/aignrt-v7-4-and-elekta-evo-linacs/311)
**Author:** [@colin\_jennings](https://forum.sgrt.org/u/colin_jennings)\ **Replies:** 3\ **Last updated:** [October 22, 2025, 8:16am UTC](https://forum.sgrt.org/t/aignrt-v7-4-and-elekta-evo-linacs/311 "2025-10-22T08:16:39Z")
We are about to take delivery of an Elekta EVO linac. This linac has a new Gating Interface and we have been told by another Elekta centre that we will need to upgrade to AlignRT v7.4 in order to be able to use SGRT with… --- ## [QA in Service Mode (True Beam)](https://forum.sgrt.org/t/qa-in-service-mode-true-beam/320)
**Author:** [@ConorWard](https://forum.sgrt.org/u/ConorWard)\ **Replies:** 1\ **Last updated:** [October 15, 2025, 9:46am UTC](https://forum.sgrt.org/t/qa-in-service-mode-true-beam/320 "2025-10-15T09:46:13Z")
Hi there, Question for any True Beam users out there. We typically would have always done our machine QA in service mode on the True Beam. However, when I’m in service mode on the True Beam, I can’t use the Align RT sys… --- ## [General or Site Specific SGRT Policy](https://forum.sgrt.org/t/general-or-site-specific-sgrt-policy/200)
**Author:** [@joanne\_horgan](https://forum.sgrt.org/u/joanne_horgan)\ **Replies:** 4\ **Last updated:** [October 15, 2025, 9:26am UTC](https://forum.sgrt.org/t/general-or-site-specific-sgrt-policy/200 "2025-10-15T09:26:35Z")
Hi, everyone. I know that ROI and other processes will vary with different anatomical sites. I am in search of a general or even specific policy examples that I can use as a guide to help in the creation of policies for … --- ## [Planned couch values, tattooless](https://forum.sgrt.org/t/planned-couch-values-tattooless/319)
**Author:** [@marko\_laaksomaa](https://forum.sgrt.org/u/marko_laaksomaa)\ **Replies:** 3\ **Last updated:** [October 13, 2025, 5:13pm UTC](https://forum.sgrt.org/t/planned-couch-values-tattooless/319 "2025-10-13T17:13:04Z")
Hi everyone Do you have any tips on how to enter the planned couch values to the first treatment fraction such that they correspond with the right ones, patient being near isocenter after automatic drive to the planned … --- ## [Commissioning Query](https://forum.sgrt.org/t/commissioning-query/265)
**Author:** [@balaa95](https://forum.sgrt.org/u/balaa95)\ **Replies:** 4\ **Last updated:** [September 3, 2025, 1:56pm UTC](https://forum.sgrt.org/t/commissioning-query/265 "2025-09-03T13:56:20Z")
Could someone please explain the methodology used to test the Field of View (FOV) and Frame Rate during the system commissioning process? Thanks, Ash --- ## [👋 Welcome to the SGRT Community!](https://forum.sgrt.org/t/welcome-to-the-sgrt-community/6)
**Author:** [@system](https://forum.sgrt.org/u/system)\ **Replies:** 0\ **Last updated:** [January 28, 2025, 2:49pm UTC](https://forum.sgrt.org/t/welcome-to-the-sgrt-community/6 "2025-01-28T14:49:05Z")
:wave: Welcome to the SGRT Community! :sun\_behind\_small\_cloud: Overview Welcome to the SGRT Community—a space for professionals, researchers, and enthusiasts to connect, share insights, and discuss all things related to… [Next page](https://forum.sgrt.org/latest.md?page=1)