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MR-LINAC consultation coming up

User
Posted 28 Oct 2026 at 11:51

Hello, everyone.

My journey to this moment has been a long one, and although I will try to be brief, I would like to share a little of my story in the hope that some of you might be able to offer advice based on your own experiences.

I was first diagnosed with prostate cancer four years ago. For some time, active surveillance seemed to be a reasonable approach, but unfortunately, the cancer has now progressed to the point where treatment has become necessary.

The options presented to me were a radical prostatectomy, brachytherapy, or external beam radiation therapy (EBRT). To be perfectly candid, none of these options was particularly appealing. Nevertheless, I had more or less resigned myself to brachytherapy, largely because I understood there was a reasonable possibility of preserving my sexual function and continuing to enjoy a fulfilling sex life afterward.

Then, rather unexpectedly, I learned about MR-Linac treatment through a friend in the United States who had undergone the procedure himself. His experience was extremely positive, and the more I learned about this technology, the more interested I became.

I should mention that I am an American who has lived in Japan for more than three decades. You may wonder why I am posting on a UK prostate cancer forum. The answer is quite simple: of all the places I have turned to for information and support, this community has consistently offered some of the most honest, thoughtful, compassionate, and genuinely helpful responses I have encountered. That is why I have returned, and why I am hoping to benefit once again from your collective experience.

When I discussed MR-Linac with my urologist, who would otherwise have performed my prostatectomy or brachytherapy, he was very enthusiastic about the possibility and encouraged me to pursue it.

My most recent biopsy revealed a Gleason score of 4+3=7, with cancer detected in 7 of 12 biopsy cores. According to the examinations performed thus far, there is no evidence that the cancer has spread beyond the prostate.

Next week, I have my first consultation at a hospital equipped with an MR-Linac machine. As I understand it, there are only two such machines in Japan, and unfortunately, neither is particularly convenient for me to reach. Nevertheless, if this treatment offers a promising combination of effectiveness and reduced side effects, I am more than willing to make the journey.

My principal concern at the moment is the length of time between deciding to pursue this treatment and actually beginning it. It has already been approximately five weeks since I received my biopsy results, and I have had to wait more than a month simply to secure this initial consultation. Naturally, I am anxious to know how much longer the process might take.

For those of you who have undergone MR-Linac treatment, I would be enormously grateful if you could share your experiences, particularly regarding the following questions:

  1. How long did you wait? Once you and your medical team agreed that MR-Linac was the appropriate treatment, how much time elapsed before your first treatment session?

  2. Were additional examinations necessary? Did you undergo another MRI, additional PSA blood tests, or other examinations before treatment could begin?

  3. How many treatment sessions did you have? I understand that some MR-Linac treatment protocols involve five sessions. Was that your experience, and over what period were they administered?

  4. How did your PSA respond? How long did it take before you began seeing a meaningful reduction in your PSA level? I understand that the decline can be gradual, but I would be interested in hearing about your personal experience.

  5. And perhaps most importantly, what side effects did you experience? I am particularly interested in urinary, bowel, and sexual side effects, both during treatment and in the months afterward. Were they temporary, or have any persisted?

I realize, of course, that everyone's circumstances are different and that no two patients will necessarily respond to treatment in the same way. Nevertheless, hearing directly from people who have been through this experience would be invaluable to me, especially as I prepare for my consultation next week.

I am trying to approach this next chapter with optimism, but I would be less than truthful if I said I wasn't also apprehensive. Having lived with this diagnosis for four years, I am now eager to move forward with treatment while giving myself the best possible chance of preserving my quality of life.

Thank you in advance to anyone who takes the time to respond. I have always appreciated the kindness and generosity of this community, and I look forward to hearing about your experiences.

(Note: I am 72 years old.)

 

User
Posted 28 Oct 2026 at 15:35

Hi,

How long did you wait? I waited a couple of months out of choice, but I could have started treatment pretty much straight away.

Were additional examinations necessary? I had to have a pre scan / measure up on the MRI-Linac machine a weeks prior to starting treatment. 

How many treatment sessions did you have? 5 over 8 days. The first two were back to back days.

How did your PSA respond? Pre treatment 7.49, 3 months after treatment 2.2 and then 2.0. I'm due another in December. 

And perhaps most importantly, what side effects did you experience? Towards the end and straight after treatment - slow flow and the feeling of peeing glass, Tamsulosin sorted that out, still taking it but have been told I can try weening off it. No bowel issues. No ED, ejaculations are different, sometimes dry possibly retrograde, sometimes fluid but with different discolouration. Fatigue was noticeable after treatment and I'm not 100% back to normal after 8 months. 

Hope this helps,

 

User
Posted 29 Oct 2026 at 14:27

Staying nearby takes away some of the stress, I'd recommend it.

I forgot to mention, on the day of my measure up on the MRI-Linac, I also had a CT Scan, which was straight forward.

I'm a keen runner, I took a couple of weeks off but then started running again, the main issue for me was some fatigue that I hadn't figured on. I wasn't told to restrict anything, just to be sensible and build back up slowly.

I imagine cycling will be slightly different as your applying 'direct' pressure to the groin area. But it will only be a temporary thing, you'll be back cycling soon after.

This site and the online community made a huge difference for me too. 

Do you know what to expect on the MRI-Linac machine? 

User
Posted 28 Oct 2026 at 13:20

Hello.

I have no experience of the MR-Linac procedure. However here are a couple of conversations that may be helpful.

https://community.prostatecanceruk.org/posts/t33580-MR-Linac-RT

https://community.prostatecanceruk.org/default.aspx?g=posts&m=317827#post317827

I see you contributed to the second conversation, but thought it might be worth reading again.

Hopefully those who have had the treatment will respond and are able to answer some of your queries.

On behalf of our community, I'd like to thank you for your kind remarks and the appreciation you've showed us.

I hope your treatment is a complete success.

Please keep us updated, and good luck. 👍 

Edited by member 28 Oct 2026 at 13:23  | Reason: Additional text

User
Posted 28 Oct 2026 at 22:31

To "pac1208":

Thank you so very much for taking the time to answer my questions. I deeply appreciate it. 

If you care to answer a few more: May I ask why you waited a couple of months to start treatment? 

If, on Nov. 4 (my consultation), I am told I can start the following week, I will. I can't see that anything will improve unless I actually start the treatment (not that I'm eagerly looking forward to it). 

Well, your PSA dropped to an acceptable number, and I guess that is one of the goals of this treatment. 

I had two prostate biopsies. Urination was hell, but I was able to. The ability to urinate was more important to me than the hellish feeling I endured. That lasted for perhaps several weeks. 

In between your 5 treatments (the same course I believe I will follow), was your diet restricted? Did you have to take an enema before the treatment began? And did you have to have a full or semi-full bladder before treatment began? 

Thank you in advance. I'm planning to keep a journal to share with others as this "experience" unfolds. 

Thank you!

User
Posted 29 Oct 2026 at 21:53
While I don't know about MR-LINAC, it sounds similar to my experience with a machine that combined CT and LINAC. Basically it did a quick scan every time so that it could adjust the beam to exactly how I was positioned within the machine and variations in bladder and rectum fullness compared with the detailed reference scan I had before treatment.

The machine was a doughnut shape with a moving table. Once I was placed on the table as accurately as possible the table was moved through the machine to scan my pelvic area (they gave me a couple of tiny tattooed dots to locate me accurately, along with cushions to position my knees and feet). The table then reset itself for the radiotherapy and although you couldn't tell I think the beam came from various positions around the doughnut as the table moved me slowly a couple of inches to include the entire prostate target.

Once I was positioned my head was moved to the far side of the doughnut (which was then around my pelvis), so it wasn't actually that claustrophobic though obviously I was very conscious of having to stay still.

The worst bit was trying to get the bladder fulness right, I tried to follow instructions but sometimes had to drink and wait more, or manage to wee a fraction of a bladder full. I was given instructions about eating non-gassy food and having a mild laxative daily to get the rectum right but that just about worked OK, there was just one time when I was apparently at the limit of what was acceptable.

I had 20 sessions, the regime with just 5 is a more recent development. For the first three weeks I cycled to the hospital which is about 5 miles from my home including a couple of short steep hills. By the last week I was feeling short of energy and chose to take the car. I can't remember how long it was after it finished before I got on my bike again, that feeling of exhaustion lasted about another month during which I took it easy with exercise. But we went away to the Alps after that where we did a few decent walks.

My situation was different because it was salvage radiotherapy after my PSA started rising after previous prostatectomy. I already had slightly compromised continence (wearing a pad a day) which became slightly worse. Having no prostate I couldn't ejaculate but still had reasonable erectile function and that again worsened. The radiotherapy did affect my bowel function slightly (no problem after the operation) and I find I need to "go" rather more often than before, mostly that just produces a bit of urgency in the mornings not long after I get out of bed and happily when I am close to a toilet. PSA has stayed low so far.

Good luck.

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User
Posted 28 Oct 2026 at 13:20

Hello.

I have no experience of the MR-Linac procedure. However here are a couple of conversations that may be helpful.

https://community.prostatecanceruk.org/posts/t33580-MR-Linac-RT

https://community.prostatecanceruk.org/default.aspx?g=posts&m=317827#post317827

I see you contributed to the second conversation, but thought it might be worth reading again.

Hopefully those who have had the treatment will respond and are able to answer some of your queries.

On behalf of our community, I'd like to thank you for your kind remarks and the appreciation you've showed us.

I hope your treatment is a complete success.

Please keep us updated, and good luck. 👍 

Edited by member 28 Oct 2026 at 13:23  | Reason: Additional text

User
Posted 28 Oct 2026 at 15:35

Hi,

How long did you wait? I waited a couple of months out of choice, but I could have started treatment pretty much straight away.

Were additional examinations necessary? I had to have a pre scan / measure up on the MRI-Linac machine a weeks prior to starting treatment. 

How many treatment sessions did you have? 5 over 8 days. The first two were back to back days.

How did your PSA respond? Pre treatment 7.49, 3 months after treatment 2.2 and then 2.0. I'm due another in December. 

And perhaps most importantly, what side effects did you experience? Towards the end and straight after treatment - slow flow and the feeling of peeing glass, Tamsulosin sorted that out, still taking it but have been told I can try weening off it. No bowel issues. No ED, ejaculations are different, sometimes dry possibly retrograde, sometimes fluid but with different discolouration. Fatigue was noticeable after treatment and I'm not 100% back to normal after 8 months. 

Hope this helps,

 

User
Posted 28 Oct 2026 at 22:31

To "pac1208":

Thank you so very much for taking the time to answer my questions. I deeply appreciate it. 

If you care to answer a few more: May I ask why you waited a couple of months to start treatment? 

If, on Nov. 4 (my consultation), I am told I can start the following week, I will. I can't see that anything will improve unless I actually start the treatment (not that I'm eagerly looking forward to it). 

Well, your PSA dropped to an acceptable number, and I guess that is one of the goals of this treatment. 

I had two prostate biopsies. Urination was hell, but I was able to. The ability to urinate was more important to me than the hellish feeling I endured. That lasted for perhaps several weeks. 

In between your 5 treatments (the same course I believe I will follow), was your diet restricted? Did you have to take an enema before the treatment began? And did you have to have a full or semi-full bladder before treatment began? 

Thank you in advance. I'm planning to keep a journal to share with others as this "experience" unfolds. 

Thank you!

User
Posted 29 Oct 2026 at 12:01
Hi, glad to help,

 

I chose to wait, firstly because although the treatment required was relatively urgent, I was advised that a couple of months wait wouldn't make a difference. Secondly because I had to travel for treatment, I decided to stay near to the hospital for 10 days and so I was able to plan that around family and work.

 

I had no diet restrictions and no enema, bowels (or gas) weren't mentioned at any stage. 

 

On treatment days I was required to empty my bladder on arrival at the hospital and then about 20 mins before starting treatment I had to drink 2 full cups of warm water.

 

The treatment session lasted around an hour (end to end) so it was getting a little bit uncomfortable towards the end with a full bladder. At the start of the treatment, they check how full your bladder is and if it isn't full enough, they will either leave you in the machine for a while to see if your bladder fills up a bit more or they bring you out of the machine and give you more water to drink. 

 

I'd say try not to worry too much about the full bladder. You don't get into the machine at the start feeling like you need a wee, it's towards the end of the treatment you're likely to be thinking about it. 

 

I'm happy with my PSA levels for now,  I think they can take up to two years before settling down.  

 

The journal idea sounds great. It will really help people.

 

Cheers
User
Posted 29 Oct 2026 at 12:53

pac1208: Many thanks again. I don't know how it was for you, but I have no family here, only my partner. I have no support group, so sites like this make a big difference for me. 

Because it's about a 90-minute commute to the hospital, I'm not keen on returning in between sessions and am considering staying at a hotel near the hospital. 

My friend said he had to have an enema before starting the procedure, which is why I asked. But I hope I will not have to. 

Have you been able to resume daily activities? My main concern is that I will not be able to go biking (regular 6-speed bike), which is my main transport other than subways and trains. I'd like to do stretching and light weights at home. Were you told to restrict your movements or limit your exercise? 

Thank you again. 


User
Posted 29 Oct 2026 at 14:27

Staying nearby takes away some of the stress, I'd recommend it.

I forgot to mention, on the day of my measure up on the MRI-Linac, I also had a CT Scan, which was straight forward.

I'm a keen runner, I took a couple of weeks off but then started running again, the main issue for me was some fatigue that I hadn't figured on. I wasn't told to restrict anything, just to be sensible and build back up slowly.

I imagine cycling will be slightly different as your applying 'direct' pressure to the groin area. But it will only be a temporary thing, you'll be back cycling soon after.

This site and the online community made a huge difference for me too. 

Do you know what to expect on the MRI-Linac machine? 

User
Posted 29 Oct 2026 at 21:09

pac1208:

I'm happy to know you were able to resume running. I'll make sure I ask about biking, but, as you said, direct pressure to the groin area so I may be told to stay off it for a while. 

As for the actual MR-Linac experience, I assume it's similar to having an MRI where one is placed inside a tube and told not to move. I'm not keen on it, but as long as I close my eyes, I'm all right. I imagine it's the same claustrophobic feeling. My friend said they allowed him to listen to music. In that regard, I don't know if I'll be given that option. 

Having a CT Scan beforehand makes sense to me. 

Thank you again for these follow-ups. 

User
Posted 29 Oct 2026 at 21:53
While I don't know about MR-LINAC, it sounds similar to my experience with a machine that combined CT and LINAC. Basically it did a quick scan every time so that it could adjust the beam to exactly how I was positioned within the machine and variations in bladder and rectum fullness compared with the detailed reference scan I had before treatment.

The machine was a doughnut shape with a moving table. Once I was placed on the table as accurately as possible the table was moved through the machine to scan my pelvic area (they gave me a couple of tiny tattooed dots to locate me accurately, along with cushions to position my knees and feet). The table then reset itself for the radiotherapy and although you couldn't tell I think the beam came from various positions around the doughnut as the table moved me slowly a couple of inches to include the entire prostate target.

Once I was positioned my head was moved to the far side of the doughnut (which was then around my pelvis), so it wasn't actually that claustrophobic though obviously I was very conscious of having to stay still.

The worst bit was trying to get the bladder fulness right, I tried to follow instructions but sometimes had to drink and wait more, or manage to wee a fraction of a bladder full. I was given instructions about eating non-gassy food and having a mild laxative daily to get the rectum right but that just about worked OK, there was just one time when I was apparently at the limit of what was acceptable.

I had 20 sessions, the regime with just 5 is a more recent development. For the first three weeks I cycled to the hospital which is about 5 miles from my home including a couple of short steep hills. By the last week I was feeling short of energy and chose to take the car. I can't remember how long it was after it finished before I got on my bike again, that feeling of exhaustion lasted about another month during which I took it easy with exercise. But we went away to the Alps after that where we did a few decent walks.

My situation was different because it was salvage radiotherapy after my PSA started rising after previous prostatectomy. I already had slightly compromised continence (wearing a pad a day) which became slightly worse. Having no prostate I couldn't ejaculate but still had reasonable erectile function and that again worsened. The radiotherapy did affect my bowel function slightly (no problem after the operation) and I find I need to "go" rather more often than before, mostly that just produces a bit of urgency in the mornings not long after I get out of bed and happily when I am close to a toilet. PSA has stayed low so far.

Good luck.

 
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