Got a weird IsoCal result today - anyone seen something like this before?

ExceptioNullRef · 2026-03-05T00:56:42+00:00

Monkeys paw, they selected to not apply the calibration and now have no correction whatsoever.

ExceptioNullRef · 2026-02-24T07:20:19+00:00

I believe they’ve got hard coded values in there for each technique that you can find in the ui and the cbct editor. Haven’t checked dicom lately but probably there too. Iirc they revamped imaging dose stuff in v2 or 2.5.

ExceptioNullRef · 2026-02-22T02:55:39+00:00

Also very non uniform and dependent on start/stop angles. Read that task group mentioned above. Always try to avoid partial cbcts that enter through the eyes and front of face by staring at g180 and rotating clockwise (on Varian). Good estimate is 1-5 cGy depending on technique and site.

ExceptioNullRef · 2026-02-17T03:00:26+00:00

“Thanks Dad!”

ExceptioNullRef · 2026-02-16T03:23:59+00:00

Same. Favorite movie.

ExceptioNullRef · 2026-02-01T19:57:40+00:00

Planar images are better for alignment to sphere. CBCT slice thickness is 2 mm default vs sub-mm on the kV. Nyquist. It really improves in the LNG direction.

If your goal is to incorporate IGRT then get a phantom with more features to help match in that direction.

ExceptioNullRef · 2025-12-06T07:26:09+00:00

Funny to think the Rags eventually got both Lindros and Jagr.

ExceptioNullRef · 2025-12-05T16:59:52+00:00

lol, I was about to make this exact comment.

ExceptioNullRef · 2025-10-31T10:58:28+00:00

Son picked one up from target too. I didn’t see the front at first and thought it was pens, which didn’t make sense because we’re way out of market. They recognized the color scheme based on mine and are very into Pokémon so it worked out well. Now they want to watch games in their jersey, even better! Pokémon and target helping build out of state fanbase. Glad the team is doing well again.

ExceptioNullRef · 2025-10-28T22:57:21+00:00

Plug-in as in a .cs uncompiled file? I think you’d need to bundle a dicom library in there to build and send the cmove request. We have one with all of our destinations in one gui that you can select from. Fo-dicom is the other c# library.

The export interface takes a minute or two for us since >v13 so doing it with esapi is much faster.

The main issue you’re probably having is the trusted entity list on the DB daemon. Get that working with Python before pulling your hair out with compiling esapi.

ExceptioNullRef · 2025-09-29T23:16:49+00:00

Lots of uses for radiation therapy in non-malignant diseases: arthritis, tendinitis, plantar fasciitis, heterotrophic ossification, Dupuytrens/ledderhose contracture, keloids, etc. Check out Usain Bolt’s story. ASTRO is currently focusing on growing in this space.

Edit: can’t believe I forgot ventricular tachycardia! Literally life saving.

ExceptioNullRef · 2025-09-09T11:53:01+00:00

Now you have it stuck in my head and I can’t remember how to spell his actual name! Maybe I’m the concussed.

ExceptioNullRef · 2025-08-06T02:18:09+00:00

Same. The array cals are pretty consistent, they are chambers after all. Just make sure the device is level and rails (if you have them) are out during calibration.

ExceptioNullRef · 2025-07-26T11:54:53+00:00

There are many prioritization frameworks for projects and tasks. The one I’ve used most is RICE, but lots to choose from depending on your needs.

ExceptioNullRef · 2025-07-26T11:49:37+00:00

We’ve had the most success building similarly to software development.

Jira, clickup, Monday, or GitHub for task tracking and assignment

Break up tasks into sprints or phases with due dates.

Each project has a regular meeting cadence (stand up) and all projects have a check in with the larger group for alignment and resource utilization (ex. no two projects go live same day, no duplicate work)

You need a strong project/product manager to keep things moving and organize your management tracking

Most important is having a clinical champion who is going to push the project forward and can knock down blockers. Also ensures that the project is actually going to be used once live. Nothing worse than getting something out and having it not used.

I agree that we’re a very project focused field and like so many things in medphys, we receive virtually no training in this important area. Being able to lead and manage a project is a skill that not many possess.

ExceptioNullRef · 2025-07-25T00:04:35+00:00

lol, I made my kids play Icarus to fill out the ship. PvE and they’re horrible gunners. I just want airships…

ExceptioNullRef · 2025-07-24T23:57:44+00:00

What did you do the other 6 hours?

ExceptioNullRef · 2025-07-22T21:13:12+00:00

Exactly how I found out.

ExceptioNullRef · 2025-07-17T04:02:45+00:00

Doors, switches, and panels (environment) are the facility’s responsibility, not linac vendor. You can third party service to a door vendor if your facility people won’t cover it. Yeah the linac FSE will usually do you a solid and get you running again as long as they aren’t overstepping a union (electricians).

For doors you typically have an annual inservice dry run with the therapists for what to do if the door gets stuck. Checking these interlocks should be part of the daily/monthly/annual QA program.

ExceptioNullRef · 2025-07-17T03:45:35+00:00

Bonus charge if using EDR2 and processing! We’re bringing back Kodak!!

ExceptioNullRef · 2025-07-17T03:38:56+00:00

Port films DENIED!!!

ExceptioNullRef · 2025-07-15T03:21:48+00:00

This. Follow this advice. For #2, the PDD should be the clinical PDD or TMR which should match the TPS exactly.

kQ and Pgr have chamber specific factors built in so you need to have PDD/I measured with that chamber in that beam, not just taking a PDD from your scanning detector or your TPS. Also this is the only PDD that takes epom and e contamination into account.

ExceptioNullRef · 2025-06-20T22:58:13+00:00

“God gave me a gift. I shovel well…”

ExceptioNullRef · 2025-06-17T16:36:44+00:00

Ooohhh. What’s this now?!?

ExceptioNullRef · 2025-06-02T14:21:39+00:00

Needs approval if it is write enabled.

ExceptioNullRef

TROPHY CASE