MEDICAI CASE STUDY
MEDICAL IMAGING INFRASTRUCTURE 

Redesigning Medical Imaging for the Modern Healthcare System

2020 - PRESENT // LEAD DESIGNER // WEB APP, MOBILE APP, WEBSITE // WWW.MEDICAI.IO

How do you design a medical imaging platform that radiologists trust with life-or-death decisions? When I joined Medicai as the lead product designer in 2020, we faced an audacious challenge: replace legacy PACS systems that doctors had used for decades with a modern, cloud-based, HIPAA-compliant solution.

KEY RESULTS

5x

revenue increase in the past two years

~2 million

imaging studies stored and shared on the platform

82%

overall return visitor rate

Summary

The Problem

Healthcare providers were trapped in a difficult position. They relied on $100k+ legacy systems that hadn't evolved in decades, yet any change risked patient safety.

Most healthcare organizations still rely on CDs to deliver medical imaging to their patients. These systems required massive local installations, making remote work impossible, a critical limitation we'd discover during COVID-19.

Doctors needed instant access to massive medical files (300MB+ DICOM studies) on any device, anywhere. The tolerance for errors was zero. A misread scan could mean a misdiagnosis, and a system crash during surgery could be catastrophic.

On top of technical requirements, we had to navigate HIPAA compliance, which traditionally favors conservative, established designs over innovation.

My Role in This Story

Medicai was my main project during my tenure at Atta Systems.

As the lead product designer starting 2020, I was responsible for the end-to-end product design process from initial research through implementation, including designing and building the marketing website that now serves 60k+ monthly users.

A screenshot of the Medicai web app, showing the cases list in light mode
The Cases list offers medical professionals a detailed overview of their ongoing cases, featuring filters, assignees, statuses, and more.

The Process

1 — 
Understanding the Medical Mind

When I joined the project, I spent months embedding myself in Romanian hospitals, interviewing doctors, managers, and even patients facing severe health issues in order to fully understand the magnitude of the issues we were facing. What I discovered challenged every assumption I had about modern UX.

Key Learnings — Doctors weren't necessarily resistant to new technology. They were traumatized by previous failed implementations. This realization shaped our entire design philosophy. I learned that ~75% of diagnostic errors happened during handoffs between systems.

The interface needed to be invisible, not innovative.

%%{init: {'theme': 'base', 'themeVariables': { 'fontSize': '16px' }}}%%
graph TB
  %% ENTRY & AUTH
  A0[Visitor lands on medicai.io] --> A1{Authenticated?}
  A1 -- "No" --> A2[Sign-up / Login]
  A2 --> A3["Verify Email
& Choose Plan"] A1 -- "Yes" --> D0[Dashboard] %% DASHBOARD HUB subgraph Main_Hub["Dashboard"] D0 --> F0[Studies] D0 --> S0[DICOM Viewer] D0 --> API0["API &
Integrations"] D0 --> P0["Profile &
Billing"] end %% FILE WORKFLOW subgraph Study_Management F0 --> F1["Upload
DICOM Files"] F1 --> F2["AI
Pre-processing"] F2 --> F3["Assign to
Doctor"] F3 --> F4["Set
Permissions"] F4 --> F5{Status} F5 -- "Available" --> S0 F5 -- "Archived" --> F0 F5 -- "Failed" --> ERR0["Retry or
Get Support"] end %% DICOM VIEWER subgraph Dicom_Viewer S0 --> DV1["View Scans
(CT, MRI, etc.)"] DV1 --> DV2["Annotation Tools
(Measure, Draw)"] DV1 --> DV3["Generate
AI Report"] DV1 --> EXP0[Export] EXP0 --> JPG[JPG/PNG] EXP0 --> PDF[PDF Report] DV1 --> SHARE0["Share
Study"] end %% DEV PORTAL subgraph Dev_Portal["API & Docs"] API0 --> DOCS0["View
API Docs"] DOCS0 --> KEYGEN["Generate
API Keys"] KEYGEN --> TEST0["Test
Endpoints"] TEST0 --> CALLBACK["Set
Webhook URL"] --> F2 end %% ACCOUNT subgraph Account P0 --> P1["Update
Profile Info"] P0 --> BILL["Manage
Billing"] BILL --> PAYHIST["View
Invoices"] BILL --> UPGRADE["Change
Subscription"] end %% ADMIN (internal) subgraph Admin_Only ADM0[Admin Login] --> ADM1["Manage
Hospitals"] ADM1 --> ADM2["Rollout
AI Models"] ADM2 --> ADM3["System
Monitoring"] ADM2 --> ADM4["Accuracy
Benchmarks"] end %% EXITS ERR0 -.-> SupportChat[Live Chat] D0 --> LOGOUT((Log out))
One of the user flow diagrams we've done over the years. Some things make it in the product, some things don't.

2 — 
Mapping the Chaos

I documented dozens of different user flows across multiple user types, including radiologists who need speed and precision above all, referring physicians who want quick answers, patients confused by medical terminology, administrators who care about compliance, and technicians who manage the daily workflow.

The existing workflow was shockingly antiquated. Image sharing still happened via burned CDs in 2019 (and it still happens that way today in a lot of cases). Uploading a single study required multiple steps across multiple systems, and most users shared their imaging files using WeTransfer, which was never designed for sending sensitive medical data. Email chains with 50MB attachment limits meant critical images often arrived pixelated or not at all.

Lost studies sometimes required repeated radiation exposure: an unacceptable risk we had to eliminate.

A screenshot of the Medicai Web App, showing the Case Details screen
Case Details view showing in-depth information about the Patient, as well as all of the relevant medical imaging and documents, including comments.

3 —
The Shadow-Sketch-Test Methodology

I pioneered a rapid iteration approach that compressed months of traditional design into days. One day of shadowing would yield observations of real workflows and pain points. Those insights immediately translated into dozens of wireframes exploring solutions while the insights were fresh.

Within days, we'd have multiple prototypes tested with actual users, on 1:1 interviews via video calls or visits on location.

This methodology led to breakthrough insights, like discovering that doctors preferred darker interfaces not (just) for aesthetics, but mainly because they review images in dimly lit reading rooms to better perceive subtle contrast differences in scans.

A screenshot of the Medicai web app, showing the cases list in light modeA screenshot of the Medicai web app, showing the cases list in dark mode
Light
Dark
Dark mode is not just a stylistic choice; it is essential for radiologists who work with medical imaging in dimly lit rooms.

4 —
Designing For Trust

Implementing a zero-footprint DICOM viewer that could replace $100k desktop software became one of our centerpiece challenges.

I studied how radiologists actually read images, spending hours learning to read scans myself. The workflow was intricate: window/level adjustments every 3-5 seconds, rapid scrolling through 200+ slices, constant measurement and annotation, and side-by-side historical comparisons.

Besides that, healthcare professionals needed an easy and secure way to collaborate on medical imaging, regardless of their location or their device. We had to ensure they can easily access patient files, respond to comments, and upload and view any relevant documents (PDFs, images, Word documents, etc.) besides DICOM imaging files.

The Medicai platform maintains full HIPAA and GDPR compliance, plus ISO 27001 certification for information security management and ISO 9001 for quality management systems, meeting regulatory requirements across the US, EU, and international markets.

The Solution

1 —
Zero-Footprint Architecture

Over the past two years, working with the software engineers at Atta Systems, we replaced the old, install-heavy PACS with a true zero-footprint stack: every layer—PACS, VNA and diagnostic viewer—now runs inside a standard browser.

A plug-and-play DICOM Node dropped on-prem streams studies to the cloud in minutes, while Medicai’s DICOM viewer renders CT, MRI and X-ray series on any device—no VPNs, plugins or local storage required.  

The Medicai DICOM viewer is powered by FDA-approved technology from FlexView. The platform operates on Microsoft Azure healthcare-specific cloud infrastructure, with Medicai being a certified Microsoft Partner.

To date, Medicai holds almost 2 million imaging studies just like the one below, accessibile from anywhere, on any device.

Responsive DICOM Viewer
Loading DICOM Viewer…
The DICOM viewer, as shown in the Medicai Web and Mobile apps. Go ahead, play around with it, I've turned off the lights for you.

2 —
Unified Experience Across Complexity

Rather than building one interface that satisfies no one, we've created a three-tier interface strategy. Patients see one-click viewing with plain language and simple sharing via link. Referring physicians get essential tools with a focus on comparison.

Screen of Medicai Mobile App showing the Cases list viewScreen of Medicai Mobile App showing the Case Details viewScreen of Medicai Mobile App showing the DICOM Viewer
The Medicai Mobile App provides a streamlined version of the platform, designed for effective medical imaging visualization and collaboration on the go. Available on iOS and Android.

3 — 
The Medicai Design System

Building a design system from scratch for healthcare required balancing flexibility with strict compliance needs.

The system, implemented using Figma, includes hundreds of components optimized for healthcare workflows, with every interaction tested in real medical environments. Design tokens maintain consistency across platforms while allowing for necessary platform-specific optimizations.

This systematic approach effectively reduced design-to-development time by half.

Medicai Design SystemMedicai Design SystemMedicai Design SystemMedicai Design System
A quick glimpse at the Medicai Design System, which has been continuously refined and expanded over the years

4 —
Marketing Website at Enterprise Scale

Beyond the product, my other major contribution is building Medicai's entire website using Webflow. This wasn't just a marketing site, it became a critical growth engine. The challenge was competing with established medical software giants while maintaining startup agility.

Together with the Medicai Marketing Team, I've contributed to designing and building over 30,000 pages, implementing a programmatic, API-driven SEO strategy with templates for condition-specific and modality-specific landing pages, as well as healthcare organization and doctor profile pages. The website supports 5 languages with regional content variations and achieves 90+ PageSpeed scores despite heavy medical imagery.

The CMS architecture I developed in Webflow handles complex medical taxonomies while remaining maintainable by non-technical team members. Integrations with tools like Posthog, Ahrefs, and Intercom ensure we track multiple growth funnels, continuously optimize SEO, and accelerate support ticket responses.

A screenshot of the Medicai website, early 2023, before the redesignA screenshot of the Medicai website, Q2 2025, after the redesign
Early 2022
Q2 2025
The evolution of the Medicai Website — www.medicai.io — Q2 2022 vs. 3 years later, Q2 2025; Notice the shift in positioning.
Over the last two years, the website has experienced a steady increase in daily traffic, according to average figures from Google Analytics
Mircea Popa, CEO, Medicai

"In the high-stakes world of medical imaging, trust is everything. Ever since Medicai was in its infancy, Călin’s design leadership was crucial in building that trust with clinicians. He embedded himself in our users' world, understanding their workflows in a way that allowed him to design a platform that felt both innovative and incredibly familiar.

The results speak for themselves: his work on the user experience was a key factor in achieving an 80+% return-visitor rate, a number that proves we built a tool that medical professionals can truly rely on."

— Mircea Popa, CEO @ Medicai

Impact

All insights in this case study are based on internal analytics data from the past 2 years and public financial data.

1 — 
Platform Growth & Adoption

3× increase in website traffic
driven by a successful organic search strategy

3x increase in monthly active users
growing the platform to a total user base of over 20k individuals

50+ enterprise-level organizations
including major hospitals and clinical groups who now rely on Medicai for their imaging infrastructure

2 million imaging studies
stored and managed securely within the platform, demonstrating robust, at-scale performance

2 — 
User Engagement

82% Return-Visitor Rate
vastly outperforming the typical 20-40% for B2B SaaS and proving the platform's long-term value to professionals

55% Overall Engagement Rate
highlighting a highly effective UX that captures and retains user attention

52-min avg. session
using the DICOM viewer, indicating that radiologists stay engaged 5–10x longer than the industry norm

3 — 
Business & Real-World Outcomes

5x revenue increase
over the past two years, directly linking platform adoption to financial success

$1.6M in Venture Funding
secured from notable investors, providing strong external validation of the company's trajectory and the product's market fit

5+ work-years
of clinician time spent inside Medicai in just two years

Starting in 2022, via our "Tumour Board" initiative, with support from Heal 21 Association and Blue Heron Foundation, Medicai has enabled remote consultations for Ukraine-based patients conducted by healthcare professionals across the globe.

The "Tumour Board" project continues to this day, and has since impacted the lives of thousands of patients, all fully remote.

Read more about it on TechCrunch

In Retrospect

Designing for healthcare taught me that innovation isn't always about reinventing the wheel. Sometimes it's about understanding why the wheel was shaped that way in the first place, then making it roll more smoothly.

Key Learnings — Trust is hardly earned in today's digital products, and can be lost in milliseconds. In healthcare, every interaction carries weight. Familiar patterns can be more innovative than novel interfaces when they unlock new capabilities. Performance is a feature in life-critical applications. Every second saved could be a life saved.

Perhaps most importantly, designing the product and the website creates powerful synergies that accelerate growth.

Let's Connect

Got a complex product that needs to feel simple? Get in touch and let's figure out how to make it happen.

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