Tools & Wizards About Us
radiopaedia.org screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    48% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

radiopaedia.org

Radiopaedia.org, the peer-reviewed collaborative radiology resource

Page Load Speed

2.6 sec in total

First Response

15 ms

Resources Loaded

2.3 sec

Page Rendered

297 ms

radiopaedia.org screenshot

About Website

Welcome to radiopaedia.org homepage info - get ready to check Radiopaedia best content for United States right away, or after learning these important things about radiopaedia.org

Radiopaedia.org, the online collaborative radiology resource.

Visit radiopaedia.org

Key Findings

We analyzed Radiopaedia.org page load time and found that the first response time was 15 ms and then it took 2.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

radiopaedia.org performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

43/100

10%

LCP (Largest Contentful Paint)

Value6.5 s

9/100

25%

SI (Speed Index)

Value6.7 s

36/100

10%

TBT (Total Blocking Time)

Value2,080 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value21.6 s

1/100

10%

Network Requests Diagram

radiopaedia.org

15 ms

css

30 ms

frameworks-0a3af18701824b1f9899c6efa24e5f54.css

5 ms

common-0bfa1aa66cc2b57ca60d209fb82af975.css

17 ms

jsapi

28 ms

Our browser made a total of 316 requests to load all elements on the main page. We found that 8% of them (24 requests) were addressed to the original Radiopaedia.org, 9% (28 requests) were made to Us-u.openx.net and 8% (25 requests) were made to Us-ads.openx.net. The less responsive or slowest element that took the longest time to load (372 ms) relates to the external source Search.spotxchange.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.2 MB (63%)

Content Size

1.8 MB

After Optimization

689.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Radiopaedia.org main page is 1.8 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 23.2 kB

  • Original 32.6 kB
  • After minification 30.7 kB
  • After compression 9.4 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 23.2 kB or 71% of the original size.

Image Optimization

-2%

Potential reduce by 4.1 kB

  • Original 209.7 kB
  • After minification 205.6 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Radiopaedia images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 879.3 kB

  • Original 1.3 MB
  • After minification 1.2 MB
  • After compression 417.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 879.3 kB or 68% of the original size.

CSS Optimization

-82%

Potential reduce by 252.8 kB

  • Original 309.4 kB
  • After minification 308.1 kB
  • After compression 56.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Radiopaedia.org needs all CSS files to be minified and compressed as it can save up to 252.8 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 199 (75%)

Requests Now

265

After Optimization

66

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 265 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Radiopaedia. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 57 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

radiopaedia.org

radiopaedia.org

15 ms

css

css

30 ms

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radiology;cat=radiology;cat=diagnosticimaging;pos=top;sz=728x90;dc_ref=http%3A%2F%2Fradiopaedia.org%2F;ord=7453237653654145

106 ms

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109 ms

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vpvast

vpvast

71 ms

getVast.aspx

getVast.aspx

23 ms

dt

dt

30 ms

3866364

3866364

84 ms

beacon

beacon

104 ms

TE4p1bO6ZARGAE6SAd3CiXRysRMTNpqke3nOzfbt9TpfeYcf+BygRd+RAeHdIY_fvVl_qGV1Nes=

TE4p1bO6ZARGAE6SAd3CiXRysRMTNpqke3nOzfbt9TpfeYcf+BygRd+RAeHdIY_fvVl_qGV1Nes=

21 ms

dt

dt

29 ms

Pug

Pug

28 ms

jsvpaid.js

jsvpaid.js

106 ms

411f1e96-3bde-4d85-b17e-63749e5f0695.js

411f1e96-3bde-4d85-b17e-63749e5f0695.js

85 ms

mobile-ad-source.html

mobile-ad-source.html

28 ms

ad_source.js

ad_source.js

40 ms

activeview

activeview

14 ms

activeview

activeview

15 ms

TE4p1bO6ZARGAE6SAd3CiXRysRMTNpqke3nOzfbt9TpfeYcf+BygRd+RAeHdIY_fvVl_qGV1Nes=

TE4p1bO6ZARGAE6SAd3CiXRysRMTNpqke3nOzfbt9TpfeYcf+BygRd+RAeHdIY_fvVl_qGV1Nes=

157 ms

411f1e96-3bde-4d85-b17e-63749e5f0695

411f1e96-3bde-4d85-b17e-63749e5f0695

46 ms

activeview

activeview

16 ms

Accessibility Review

radiopaedia.org accessibility score

74

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

radiopaedia.org best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

SEO Factors

radiopaedia.org SEO score

79

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Radiopaedia.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Radiopaedia.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

radiopaedia.org

Open Graph description is not detected on the main page of Radiopaedia. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: