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r/RadiationTherapy↗

All About Radiation Therapy

A subreddit for all things in the world of Radiation Therapy. From dosimetry and brachytherapy to proton therapy and MRI-LINACs, and everything in between.

9.3k subscribers84 posts / mo in Sep 202671 authors / mosince 2015

r/RadiationTherapy has 9.3k members (+27% over the last 12 months). It gets about 84 posts a month from 71 people. Top topics: Radiology Residency, Passed Exams and Traveling Roles and Perspectives.

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When to post on r/RadiationTherapy

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Size and growth

How r/RadiationTherapy has grown

r/RadiationTherapy

Subscriber growth

Subscribers over time

+27%in 12 months · +4.4% in 3 months · +1.4% in 1 month
Oct 20269.3k
Growing9.3k subscribers
Data since Sep 2018Live · through Oct 2026
r/RadiationTherapy

Monthly activity

Posts, comments and authors per month

−8.7%vs Sep 2025 · −8.3% last 3 months vs the 3 before
Sep 202684
QuieterPeaked at 145 in Jan 2025
Data through Sep 2026 · October usually lands mid-November

What people talk about

Topics and brands on r/RadiationTherapy

Top topics

Share of the subreddit's posts

  1. Radiology Residency6.1%
  2. Passed Exams1.0%
  3. Traveling Roles and Perspectives0.8%
  4. Nursing Jobs0.7%
  5. ParamedicineCanada0.6%

Brands people mention

Most-mentioned brands and sites, last 12 months

Can you post

Posting rules for r/RadiationTherapy

Which post types r/RadiationTherapy allows, the karma and account age it asks for, required flair, and every community rule — read from Reddit.

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Timing and removals

How often posts get removed on r/RadiationTherapy

The best day and hour for r/RadiationTherapy, how many posts moderators remove and which kinds, the shape of its year, and weekdays against weekends.

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What to post

What works on r/RadiationTherapy

Title and body length that does well on r/RadiationTherapy, and its mix of text posts, links, images, galleries and video.

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Who writes here

Who posts on r/RadiationTherapy

Gender and age of the people who write on r/RadiationTherapy, the countries and US states they live in, their jobs, and whether a few regulars carry the conversation.

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How they talk

What people ask for on r/RadiationTherapy

Requests for recommendations, help and alternatives on r/RadiationTherapy, its signature words and phrases, the brands and sites people link with counts, and the tone of the comments.

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The full report

See all of r/RadiationTherapy

Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research