Have anyone heard of “Body Surface Imaging Therapy Navigation System”?

[tarzantass]

Hello!

Before I’m treated with Body Surface Imaging Therapy Navigation System decided by my radiologist, has anyone seen or heard of this System? It’s going to be directed at my right pelvic area and prostate. If yes, please let me know its features like how accuracy it is, etc. The radiologist said it is newly developed. Moreover, what radiotherapy is best for prostate cancer in the prostate and pelvic area? Thanks for your input.

[Graham49]

I think this is it, scanning your body optically and using this to position the radiation beam. Then if you move during radiotherapy, this can be corrected for.

“In recent years, the clinical use of Surface Guided Radi- ation Therapy (SGRT) using optical surface scanning for patient positioning, intra-fraction motion monitoring and respiratory gating techniques has increased.”

Freislederer et al. Radiation Oncology (2020) 15:187 doi.org/10.1186/s13014-020-...

Recent advances in Surface Guided Radiation Therapy

[tarzantass]

Thanks but the name of the equipment I mentioned isn’t the same (Surface Guided Radiation Therapy) mentioned by you.

[Tamarind5270]

Sorry. Never heard of it.

[tarzantass in reply to Tamarind5270]

Thanks

[j-o-h-n]

Surface-guided radiation therapy

From Wikipedia, the free encyclopedia

Surface-guided radiation therapy

Other names SGRT / Surface-image guided radiation therapy

Specialty interventional radiology/oncology

[edit on Wikidata]

Surface-guided radiation therapy (SGRT) (sometimes referred to as Surface-image Guided Radiation Therapy) is the process of using 3D imaging to position and track movement of radiation therapy patients during treatment.

Goals and clinical benefits

SGRT can help to improve the safety, effectiveness and efficiency of radiation therapy treatments, by offering guidance across every step of the radiation therapy workflow.

Developed as an advancement to image-guided radiation therapy, SGRT relies on 3D imaging as opposed to an x-ray.[1] SGRT uses cameras to feed data into a software program linked to the linear accelerator delivering the radiation.[2] Each camera uses a projector and image sensors to create a 3D surface model of a patient, by projecting a red light containing a pseudo-random speckle pattern on their skin.[3] The pattern allows the SGRT system to reference thousands of points on the skin, acting as virtual medical tattoos.[4] This imaging information is fed into the software to allow real-time tracking and sub-millimetric accuracy during radiotherapy treatments. Information on movements is fed back to the radiation therapist, who is alerted if the patient moves from the optimal position (as determined by their treatment plan). SGRT systems can be set to automatically stop the delivery of radiation if a patient moves outside of a certain tolerance level.[5]

SGRT can help to reduce errors in set-up and positioning, allow the margins around target tissue when planning to be reduced, and enable treatment to be adapted during its course, with the aim of overall improving outcomes.[6]

Good Luck, Good Health and Good Humor.

j-o-h-n

[tarzantass in reply to j-o-h-n]

Thanks John. My radio oncologist said it is a new one. I doubt it. I’m so scared to have the system directed at my prostate because the side effects would be detrimental to my daily life. Please advise as to which radio therapy is suitable for the prostate. Thank you ver much.

[j-o-h-n]

Sorry, but that's in a higher pay grade than mine...... Wishing you choose the best!

Good Luck, Good Health and Good Humor.

j-o-h-n

[tarzantass in reply to j-o-h-n]

Thanks John

[MarkS]

I would suggest VMAT (Volumetric modulated arc therapy) which is an advanced form of IMRT(Intensity modulated radiotherapy) is most suitable for PC.

[tarzantass in reply to MarkS]

Thanks Mark

[Justfor_]

Top machine currently, Elekta's Unity MRI guided LINAC. There is one in Taipei.

[tarzantass]

Thanks. How about SBRT?

[Justfor_ in reply to tarzantass]

It's a kind of a gamble. The basic idea is for the irradiation beam to hit the target and not go astray hitting organs not intended to. With usual RT protocols comprising 20 to 40 fractions some may go astray, not because the machine is broken, but because the organs move inside the body, the radiation dose is lower so the collateral damage to unintended organs is statistically governed. With SBRT at 5 fractions, the per fraction dose is higher, less than linear - that is it isn't 4 times that of the 20 fractions - yet quite higher and any miss targetting can cause more collateral damage. If you ask around you will be advised that both are "about" the same, but IMO more fractions are more safe. With MRI guided machines like the Elekta Unity the beam is constantly reajusted to follow the movement of the target, so it is definitely a safer protocol. I am writing safer because none of the three is totally safe. Beams have side lobes, there is energy defraction and scattering and so some energy will hit areas that were not intended to. The lower the latter, the better.

[tarzantass in reply to Justfor_]

Thanks Justfor. That’s very informative as regards the 5 fractions vs. the 20 fractions where the dose of radiation remitted by the former is higher than that of the latter. I guess not too many people (including myself) realize that the higher the dose is, the risk of getting the-not-intended-for organ or tissue messed up is higher. Most of the people take the number of times of the therapy (The shorter the better) into consideration.