Changelog

Since the 2.0 relaunch, we've shipped dozens of improvements based on pilot feedback. Here's a roundup of what's new, improved, and fixed.

Assessments & Study Sessions

• Redesigned Activity Page — New aesthetic matching the program admin modal, server-side pagination, a sticky Recent Assessment Cases column, expandable View Report per case, and an assessment completion card at the top.
• Filters on Both Assessment Pages — Filter by Topic and by Score; dropdowns aligned inline with headings.
• Expand All Button — Quickly expand all sections on assessment case pages; Ask Voxel AI button moved inline.
• Active Session Conflict Modal — Prevents getting trapped in stale sessions; mirrors the call-simulator pattern.
• Smarter Session Building — Attempted cases are excluded from new sessions, tag filtering added, and sessions auto-archive when the last case is graded.
• Performance by Topic — Replaced the modality breakdown with topic-based performance and completion metrics on the activity page.
• Refined AI Grading — More consistent scoring on the 0–100 scale.

DICOM Viewer

• Fullscreen Toolbar Fix — The Presets dropdown (and the rest of the toolbar) now stays visible in fullscreen mode for single-series cases.
• Faster Stack Loading — Smarter caching of spacing data speeds up large series.
• Keyboard Shortcuts — Refined shortcuts across the viewer and call simulator; duplicates removed.
• Ultrasound Key Images — No longer open in a new tab during call simulator sessions.

Call Simulator

• Fairer Grading — Brief but correct reports are no longer penalized.
• Classic/Practice Fix — Card redirects now work correctly on course pages.

Leaderboards & Gamification

• Dashboard Leaderboard — Now always shows the last 30 days.
• Cleaner Rankings — Long names no longer push case counts off-screen, and CaseStacks staff and demo programs are excluded.
• Badge Icons Restored — Fixed missing icons for Credit Earner, Top Ten, Call Veteran, and several other badges.

Search

• Better Relevance — Search results are now filtered to your selected language, so you only see matches from content you can actually read.

Voxel AI Tutor & Chat

• Session Ownership Hardening — Prevents stale chat sessions and ownership mismatches across devices.
• Safety Improvements — Additional safety handling across the Differential and Impression tools.

Text-to-Speech

• Higher-Quality Narration — Upgraded to a newer speech model for clearer, more natural case write-up narration.
• More Reliable Playback — Improved handling of edge cases to keep audio playing smoothly.

Multilanguage

• Language Switcher — Language selection now applies seamlessly across all pages, including case pages.
• Expanded Translations — Migration reminder emails, dashboard strings, and new UI strings translated across all 9 supported languages.
• Reviewed & Improved Translations — Ongoing translation quality review across all supported languages.

Pilot Experience

• Welcome Email & Setup Codes — New setup code flow for migrated users, improved welcome email wording, and scheduled daily migration reminders at 10 AM ET.
• Pilot Feedback Button — The pilot feedback modal now works on every page from the footer.
• Migrated User Notifications — A first-login changelog notification lets migrated users catch up on what changed in 2.0.
• Changelog Polish — Dark-mode styling improvements, muted dividers, and a proper show-page template.

Program Administrator Dashboard

• Cleaner PA Dashboard — Removed the redundant Dashboard tab (stats moved to the top of Users & Reports), removed the quick-export link, and cleaned up the period selector.
• User Modal Redesign — Courses/Assessments tabs moved into the modal header as pill buttons, a fixed 90vh height so tabs don't cause layout shift, and reorganized cards with balanced font sizes and independent column scrolling.

Coming Soon

• Public Launch Prep — We're continuing to expand the 2.0 platform ahead of public launch, with new upgrade options and a referral program in the works. Pilot users will continue to have their current access uninterrupted.

We want to hear from you. This update is the result of dozens of small improvements informed by pilot feedback. If you run into anything unexpected, have a suggestion, or want to tell us what's working, use the feedback button in the footer on any page — we read everything.

We've rebuilt CaseStacks from the ground up. The entire platform has been migrated to a modern tech stack, delivering significant improvements in performance, security, and maintainability — and laying the foundation for the features below.

Advanced DICOM Viewer

Our new DICOM viewer is a major leap forward with powerful tools for interacting with medical imaging.

• Measurement Tools — Length, angle, and bidirectional measurement tools let you quantify findings directly on the image.
• Region of Interest (ROI) — Draw elliptical or rectangular ROIs with automatic Hounsfield Unit calculations.
• Linked Annotations — Click any annotation referenced in the case findings and the viewer automatically navigates to that exact location on the image.
• W/L Presets — One-click windowing presets for soft tissue, lung, bone, brain, subdural, and stroke windows.
• Custom Sensitivity Controls — Fine-tune scroll speed and window/level drag sensitivity to your preference. Settings are saved to your account and persist across sessions.
• Improved Series Performance — Optimized loading with two-phase prefetching (priority images first, then full stack), memory management, and circuit-breaker fault tolerance for large series.

Study Tools

New tools built directly into the case viewing experience to support focused, uninterrupted study sessions.

• Text-to-Speech — Have case write-ups read aloud with high-quality AI voices. Choose from 8 voices, 4 playback speeds, and read individual sections or the full case. Great for auditory learners or reviewing on the go.
• Notes — Take private, rich-text notes on any case. Notes are saved to your account and linked to the case for easy reference later.
• Pomodoro Timer — A built-in study timer using the Pomodoro Technique with customizable work and break intervals. Completed sessions are tracked in your activity history.
• Lo-fi Music Player — Curated lo-fi playlists and live radio stations (Lofi Girl, Chillhop, Coffee Shop, Jazz Hop) you can listen to while studying — no need to leave the site.

AI Tools (Beta)

A suite of AI-powered assistants designed to support radiology education. All tools include safety measures and are grounded in evidence-based guidelines where applicable.

• Voxel — An AI chat tutor that lives in a sidebar panel. Ask questions, discuss cases, or get help understanding findings. Voxel can search PubMed for peer-reviewed literature and look up incidental findings guidelines mid-conversation. Adapts responses to your training level.
• Impression Generator — Paste your findings and clinical history to generate a structured radiology impression. Supports multiple report styles and modalities. Can also flag potential incidental findings with guideline-based recommendations.
• Differential Assistant — Enter imaging findings to generate an evidence-based differential diagnosis. Uses real-time web search grounding to provide current literature citations. Supports a clarifying-questions workflow to refine results, and you can save differentials for later reference.
• Incidental Findings Assistant — A deterministic lookup tool (not AI-generated) for evidence-based follow-up recommendations. Covers ACR and Fleischner guidelines for pulmonary nodules, thyroid nodules, adrenal nodules, liver lesions, adnexal findings, and gallbladder polyps. Returns exact citations, follow-up intervals, and clinical caveats every time.

Redesigned Call Simulator

The call simulator has been overhauled from a simple random-shuffle format into a structured, session-based experience.

• Sessions — Cases are now organized into discrete sessions rather than an endless random shuffle. You can configure each session before starting and review your performance afterward.
• Time & Case Limits — Set a time limit (up to 3 hours) or a case limit (up to 50 cases) per session, or run unlimited. Time-limited sessions show a live countdown.
• Resume Prior Sessions — Leave a session and pick up exactly where you left off. Active sessions are detected automatically when you return.
• Distractions Mode — Simulate the reality of a call shift. Enable distractions and the simulator will interrupt you with realistic scenarios — ED physicians calling about emergencies, ICU nurses requesting urgent reads, techs asking protocol questions. Choose from quiet, moderate, or busy frequency. You respond in real time, and your interactions are saved with the session.
• AI-Graded Preliminary Reports — Write a preliminary report for each case just like you would on a real call shift. After submission, an AI grading engine evaluates your report on a 0–10 scale against the expert findings and diagnosis. You receive detailed feedback highlighting what you identified correctly, what you missed, and educational context explaining why those findings matter. The grading rubric prioritizes diagnostic accuracy first, then finding identification and report quality.

Revamped Assessments

Assessments have been rebuilt with the same session-based structure and AI grading engine used in the call simulator, creating a more rigorous and flexible evaluation experience.

• Session-Based Structure — Assessments are now organized into configurable sessions. Set a time limit, case limit, or run unlimited. Name your sessions for easy reference later.
• AI-Graded Reports — Submit a preliminary report for each case and receive AI-powered feedback using the same grading rubric as the call simulator. Reports are scored on a 0–10 scale with detailed, educational feedback.
• Grade Display Options — Choose to see your grade and feedback after each case, or wait until the end of the session to review all results together.
• Modality Filtering — Filter available cases by imaging modality (CT, MRI, radiograph, ultrasound, nuclear medicine) when configuring a session.
• Case Locking — Once a case is graded in an assessment session, it's locked to preserve the integrity of your score. You can still attempt new cases.
• Performance Analytics — Track your average scores, score distributions, and progress over time. Program administrators can view aggregate statistics across their residents.

Multilanguage Support

CaseStacks is now available in 9 languages:

English, German, French, Spanish, Japanese, Portuguese, Chinese, Italian, and Korean.

The interface, navigation, dashboard, settings, and feature descriptions are fully translated. Select your preferred language from the language selector and your choice is saved to your account.

Social & Gamification

New features to keep you motivated and connected to the CaseStacks community.

• Leaderboard — See who's completing the most cases and who holds the longest study streaks. Leaderboards also rank radiology programs by total cases completed. Privacy controls let you opt out if you prefer.
• Badges — Earn badges for milestones and achievements across 7 categories: progress (cases and quizzes completed), streaks (consistent daily study), performance (perfect scores), specialty mastery (neuro, chest, MSK), engagement (call simulator, forum activity, saved items), and more. Showcase up to 5 favorite badges on your profile. 30 badges to earn in total, including 2 secret badges.
• Streaks — Track your daily study consistency. Hit 7 days for Week Warrior, 30 for Consistent Learner, and 100 for Dedicated Scholar.

Enhanced Progress Page

The progress page has been redesigned with interactive charts and visualizations to give you a clearer picture of your learning.

• Daily Progress Chart — Track your case completions over time with configurable views (7, 30, 90 days, or all-time).
• Category Breakdown — See your completion rates across course categories at a glance with doughnut and bar charts.
• Activity Heatmap — Visualize your study patterns across days of the week and hours of the day over the past 12 weeks.
• Session Statistics — Review your call simulator and assessment performance including cases reviewed, reports written, average grades, and time spent.

Program Admin Dashboard

An overhauled and improved dashboard for program administrators to manage their residents, track progress, and oversee their subscription — all from a single interface.

Contact us for a demo.

Expanded Help Center

The help center has been completely rewritten with 20+ articles organized across 6 categories — covering everything from getting started and account management to the DICOM viewer, AI tools, assessments, CME credits, and more. A built-in search lets you find answers instantly.

We are exhibiting at the AUR meeting in Boston April 1-5. If you are attending stop by and say hi!

We've slowed down trackpad scrolling on Mac laptops, which was previously too fast.

We've added 13 cases to the practice section of Body CT, including:

• Crohn's with obstruction and fistulas
• Gallstone ileus
• Prostatic abscess
• Duodenal diverticulum perforation secondary to small bowel obstruction
• Midgut volvulus
• Pylephlebitis
• Ruptured hepatic adenoma
• Splenosis
• Perforated appendicitis
• Hot quadrate sign
• SMV thrombosis in cirrhosis
• AAA impending rupture
• Transplant renal vein thrombosis

Our new course is on congenital hearing loss, part of the new "neuro fellowship." The following diagnoses are covered in depth:

• Brachio-oto-renal syndrome (BOR)
• CHARGE syndrome
• Cochlear hypoplasia
• Cochlear incomplete partition type I (IP-I)
• Cochlear incomplete partition type II (IP-II)
• Cochlear incomplete partition type III (IP-III)
• Cochlear nerve aplasia
• Common cavity malformation
• Congenital cholesteatoma
• External auditory canal atresia
• Labrynthitis ossificans
• Round window stenosis
• Semicircular canal stenosis

We're excited to release two new neuro courses on brain tumors and neurodegenerative disorders that are part of our new "neuro fellowship." These courses provide a more in depth review of neuro topics and more courses are planned.

Brain Tumors:

➡️ 105 Interactive Cases
➡️ Differentials
➡️ Clinical Pearls
➡️ Focused Discussion
➡️ Annotated Images
➡️ Earn up to 10.5 CME*

Neurodegenerative Diseases:

➡️ 13 Interactive Cases
➡️ Focused Discussion
➡️ Sample Reports
➡️ Annotated Images
➡️ Earn up to 1.3 CME*

*There is a fee to claim CME

We've simplified the pricing for CME claim fees, as detailed below. This change will allow us to add additional courses without making pricing overly complicated. For existing users this is unlikely to result in an increase in cost for a claim, but if it does we are happy to honor the old price. Please contact us if you have a question.

Thank you for your feedback and patience recently as we've made a few improvements:

👉 We've fixed an issue that was causing delays on page load. The site now loads significantly faster.

👉 We've fixed an issue that caused case write-ups to be shown for a prolonged time on case load.

You can now earn up to 91.25 AMA PRA category 1™ CME credits by completing cases on CaseStacks!

To earn CME you need to have PRO or Institution access. Then start completing cases and your earned CME will be automatically shown in the navigation and on your CME dashboard. When you're ready to claim your CME, complete this form (and pay the claim fee) and your certificate will be emailed to you immediately!

👉 FAQ, details, and terms.